source3/winbindd/idmap_autorid_tdb.c

   1 /*
   2  *  idmap_autorid_tdb: This file contains common code used by
   3  *  idmap_autorid and net idmap autorid utilities. The common
   4  *  code provides functions for performing various operations
   5  *  on autorid.tdb
   6  *
   7  *  Copyright (C) Christian Ambach, 2010-2012
   8  *  Copyright (C) Atul Kulkarni, 2013
   9  *  Copyright (C) Michael Adam, 2012-2013
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 3 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  23  *
  24  */
  25
  26 #include "idmap_autorid_tdb.h"
  27 #include "../libcli/security/dom_sid.h"
  28
  29 /**
  30  * Build the database keystring for getting a range
  31  * belonging to a domain sid and a range index.
  32  */
  33 static void idmap_autorid_build_keystr(const char *domsid,
  34                                        uint32_t domain_range_index,
  35                                        fstring keystr)
  36 {
  37         if (domain_range_index > 0) {
  38                 fstr_sprintf(keystr, "%s#%"PRIu32,
  39                              domsid, domain_range_index);
  40         } else {
  41                 fstrcpy(keystr, domsid);
  42         }
  43 }
  44
  45 static char *idmap_autorid_build_keystr_talloc(TALLOC_CTX *mem_ctx,
  46                                               const char *domsid,
  47                                               uint32_t domain_range_index)
  48 {
  49         char *keystr;
  50
  51         if (domain_range_index > 0) {
  52                 keystr = talloc_asprintf(mem_ctx, "%s#%"PRIu32, domsid,
  53                                          domain_range_index);
  54         } else {
  55                 keystr = talloc_strdup(mem_ctx, domsid);
  56         }
  57
  58         return keystr;
  59 }
  60
  61
  62 static bool idmap_autorid_validate_sid(const char *sid)
  63 {
  64         struct dom_sid ignore;
  65         if (sid == NULL) {
  66                 return false;
  67         }
  68
  69         if (strcmp(sid, ALLOC_RANGE) == 0) {
  70                 return true;
  71         }
  72
  73         return dom_sid_parse(sid, &ignore);
  74 }
  75
  76 struct idmap_autorid_addrange_ctx {
  77         struct autorid_range_config *range;
  78         bool acquire;
  79 };
  80
  81 static NTSTATUS idmap_autorid_addrange_action(struct db_context *db,
  82                                               void *private_data)
  83 {
  84         struct idmap_autorid_addrange_ctx *ctx;
  85         uint32_t requested_rangenum, stored_rangenum;
  86         struct autorid_range_config *range;
  87         bool acquire;
  88         NTSTATUS ret;
  89         uint32_t hwm;
  90         char *numstr;
  91         struct autorid_global_config *globalcfg;
  92         fstring keystr;
  93         uint32_t increment;
  94         TALLOC_CTX *mem_ctx = NULL;
  95
  96         ctx = (struct idmap_autorid_addrange_ctx *)private_data;
  97         range = ctx->range;
  98         acquire = ctx->acquire;
  99         requested_rangenum = range->rangenum;
 100
 101         if (db == NULL) {
 102                 DEBUG(3, ("Invalid database argument: NULL"));
 103                 return NT_STATUS_INVALID_PARAMETER;
 104         }
 105
 106         if (range == NULL) {
 107                 DEBUG(3, ("Invalid range argument: NULL"));
 108                 return NT_STATUS_INVALID_PARAMETER;
 109         }
 110
 111         DEBUG(10, ("Adding new range for domain %s "
 112                    "(domain_range_index=%"PRIu32")\n",
 113                    range->domsid, range->domain_range_index));
 114
 115         if (!idmap_autorid_validate_sid(range->domsid)) {
 116                 DEBUG(3, ("Invalid SID: %s\n", range->domsid));
 117                 return NT_STATUS_INVALID_PARAMETER;
 118         }
 119
 120         idmap_autorid_build_keystr(range->domsid, range->domain_range_index,
 121                                    keystr);
 122
 123         ret = dbwrap_fetch_uint32_bystring(db, keystr, &stored_rangenum);
 124
 125         if (NT_STATUS_IS_OK(ret)) {
 126                 /* entry is already present*/
 127                 if (acquire) {
 128                         DEBUG(10, ("domain range already allocated - "
 129                                    "Not adding!\n"));
 130                         return NT_STATUS_OK;
 131                 }
 132
 133                 if (stored_rangenum != requested_rangenum) {
 134                         DEBUG(1, ("Error: requested rangenumber (%u) differs "
 135                                   "from stored one (%u).\n",
 136                                   requested_rangenum, stored_rangenum));
 137                         return NT_STATUS_UNSUCCESSFUL;
 138                 }
 139
 140                 DEBUG(10, ("Note: stored range agrees with requested "
 141                            "one - ok\n"));
 142                 return NT_STATUS_OK;
 143         }
 144
 145         /* fetch the current HWM */
 146         ret = dbwrap_fetch_uint32_bystring(db, HWM, &hwm);
 147         if (!NT_STATUS_IS_OK(ret)) {
 148                 DEBUG(1, ("Fatal error while fetching current "
 149                           "HWM value: %s\n", nt_errstr(ret)));
 150                 return NT_STATUS_INTERNAL_ERROR;
 151         }
 152
 153         mem_ctx = talloc_stackframe();
 154
 155         ret = idmap_autorid_loadconfig(db, mem_ctx, &globalcfg);
 156         if (!NT_STATUS_IS_OK(ret)) {
 157                 DEBUG(1, ("Fatal error while fetching configuration: %s\n",
 158                           nt_errstr(ret)));
 159                 goto error;
 160         }
 161
 162         if (acquire) {
 163                 /*
 164                  * automatically acquire the next range
 165                  */
 166                 requested_rangenum = hwm;
 167         }
 168
 169         if (requested_rangenum >= globalcfg->maxranges) {
 170                 DEBUG(1, ("Not enough ranges available: New range %u must be "
 171                           "smaller than configured maximum number of ranges "
 172                           "(%u).\n",
 173                           requested_rangenum, globalcfg->maxranges));
 174                 ret = NT_STATUS_NO_MEMORY;
 175                 goto error;
 176         }
 177
 178         /*
 179          * Check that it is not yet taken.
 180          * If the range is requested and < HWM, we need
 181          * to check anyways, and otherwise, we also better
 182          * check in order to prevent further corruption
 183          * in case the db has been externally modified.
 184          */
 185
 186         numstr = talloc_asprintf(mem_ctx, "%u", requested_rangenum);
 187         if (!numstr) {
 188                 DEBUG(1, ("Talloc failed!\n"));
 189                 ret = NT_STATUS_NO_MEMORY;
 190                 goto error;
 191         }
 192
 193         if (dbwrap_exists(db, string_term_tdb_data(numstr))) {
 194                 DEBUG(1, ("Requested range '%s' is already in use.\n", numstr));
 195
 196                 if (requested_rangenum < hwm) {
 197                         ret = NT_STATUS_INVALID_PARAMETER;
 198                 } else {
 199                         ret = NT_STATUS_INTERNAL_DB_CORRUPTION;
 200                 }
 201
 202                 goto error;
 203         }
 204
 205         if (requested_rangenum >= hwm) {
 206                 /*
 207                  * requested or automatic range >= HWM:
 208                  * increment the HWM.
 209                  */
 210
 211                 /* HWM always contains current max range + 1 */
 212                 increment = requested_rangenum + 1 - hwm;
 213
 214                 /* increase the HWM */
 215                 ret = dbwrap_change_uint32_atomic_bystring(db, HWM, &hwm,
 216                                                            increment);
 217                 if (!NT_STATUS_IS_OK(ret)) {
 218                         DEBUG(1, ("Fatal error while incrementing the HWM "
 219                                   "value in the database: %s\n",
 220                                   nt_errstr(ret)));
 221                         goto error;
 222                 }
 223         }
 224
 225         /*
 226          * store away the new mapping in both directions
 227          */
 228
 229         ret = dbwrap_store_uint32_bystring(db, keystr, requested_rangenum);
 230         if (!NT_STATUS_IS_OK(ret)) {
 231                 DEBUG(1, ("Fatal error while storing new "
 232                           "domain->range assignment: %s\n", nt_errstr(ret)));
 233                 goto error;
 234         }
 235
 236         numstr = talloc_asprintf(mem_ctx, "%u", requested_rangenum);
 237         if (!numstr) {
 238                 ret = NT_STATUS_NO_MEMORY;
 239                 goto error;
 240         }
 241
 242         ret = dbwrap_store_bystring(db, numstr,
 243                         string_term_tdb_data(keystr), TDB_INSERT);
 244
 245         if (!NT_STATUS_IS_OK(ret)) {
 246                 DEBUG(1, ("Fatal error while storing new "
 247                           "domain->range assignment: %s\n", nt_errstr(ret)));
 248                 goto error;
 249         }
 250
 251         DEBUG(5, ("%s new range #%d for domain %s "
 252                   "(domain_range_index=%"PRIu32")\n",
 253                   (acquire?"Acquired":"Stored"),
 254                   requested_rangenum, keystr,
 255                   range->domain_range_index));
 256
 257         range->rangenum = requested_rangenum;
 258
 259         range->low_id = globalcfg->minvalue
 260                       + range->rangenum * globalcfg->rangesize;
 261
 262         ret = NT_STATUS_OK;
 263
 264 error:
 265         talloc_free(mem_ctx);
 266         return ret;
 267 }
 268
 269 static NTSTATUS idmap_autorid_addrange(struct db_context *db,
 270                                        struct autorid_range_config *range,
 271                                        bool acquire)
 272 {
 273         NTSTATUS status;
 274         struct idmap_autorid_addrange_ctx ctx;
 275
 276         ctx.acquire = acquire;
 277         ctx.range = range;
 278
 279         status = dbwrap_trans_do(db, idmap_autorid_addrange_action, &ctx);
 280         return status;
 281 }
 282
 283 NTSTATUS idmap_autorid_setrange(struct db_context *db,
 284                                 const char *domsid,
 285                                 uint32_t domain_range_index,
 286                                 uint32_t rangenum)
 287 {
 288         NTSTATUS status;
 289         struct autorid_range_config range;
 290
 291         ZERO_STRUCT(range);
 292         fstrcpy(range.domsid, domsid);
 293         range.domain_range_index = domain_range_index;
 294         range.rangenum = rangenum;
 295
 296         status = idmap_autorid_addrange(db, &range, false);
 297         return status;
 298 }
 299
 300 static NTSTATUS idmap_autorid_acquire_range(struct db_context *db,
 301                                             struct autorid_range_config *range)
 302 {
 303         return idmap_autorid_addrange(db, range, true);
 304 }
 305
 306 static NTSTATUS idmap_autorid_getrange_int(struct db_context *db,
 307                                            struct autorid_range_config *range)
 308 {
 309         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 310         struct autorid_global_config *globalcfg = NULL;
 311         fstring keystr;
 312
 313         if (db == NULL || range == NULL) {
 314                 DEBUG(3, ("Invalid arguments received\n"));
 315                 goto done;
 316         }
 317
 318         if (!idmap_autorid_validate_sid(range->domsid)) {
 319                 DEBUG(3, ("Invalid SID: '%s'\n", range->domsid));
 320                 status = NT_STATUS_INVALID_PARAMETER;
 321                 goto done;
 322         }
 323
 324         idmap_autorid_build_keystr(range->domsid, range->domain_range_index,
 325                                    keystr);
 326
 327         DEBUG(10, ("reading domain range for key %s\n", keystr));
 328         status = dbwrap_fetch_uint32_bystring(db, keystr, &(range->rangenum));
 329         if (!NT_STATUS_IS_OK(status)) {
 330                 DEBUG(1, ("Failed to read database for key '%s': %s\n",
 331                           keystr, nt_errstr(status)));
 332                 goto done;
 333         }
 334
 335         status = idmap_autorid_loadconfig(db, talloc_tos(), &globalcfg);
 336         if (!NT_STATUS_IS_OK(status)) {
 337                 DEBUG(1, ("Failed to read global configuration"));
 338                 goto done;
 339         }
 340         range->low_id = globalcfg->minvalue
 341                       + range->rangenum * globalcfg->rangesize;
 342
 343         TALLOC_FREE(globalcfg);
 344 done:
 345         return status;
 346 }
 347
 348 NTSTATUS idmap_autorid_getrange(struct db_context *db,
 349                                 const char *domsid,
 350                                 uint32_t domain_range_index,
 351                                 uint32_t *rangenum,
 352                                 uint32_t *low_id)
 353 {
 354         NTSTATUS status;
 355         struct autorid_range_config range;
 356
 357         if (rangenum == NULL) {
 358                 return NT_STATUS_INVALID_PARAMETER;
 359         }
 360
 361         ZERO_STRUCT(range);
 362         fstrcpy(range.domsid, domsid);
 363         range.domain_range_index = domain_range_index;
 364
 365         status = idmap_autorid_getrange_int(db, &range);
 366         if (!NT_STATUS_IS_OK(status)) {
 367                 return status;
 368         }
 369
 370         *rangenum = range.rangenum;
 371
 372         if (low_id != NULL) {
 373                 *low_id = range.low_id;
 374         }
 375
 376         return NT_STATUS_OK;
 377 }
 378
 379 NTSTATUS idmap_autorid_get_domainrange(struct db_context *db,
 380                                        struct autorid_range_config *range,
 381                                        bool read_only)
 382 {
 383         NTSTATUS ret;
 384
 385         ret = idmap_autorid_getrange_int(db, range);
 386         if (!NT_STATUS_IS_OK(ret)) {
 387                 if (read_only) {
 388                         return NT_STATUS_NOT_FOUND;
 389                 }
 390
 391                 ret = idmap_autorid_acquire_range(db, range);
 392         }
 393
 394         DEBUG(10, ("Using range #%d for domain %s "
 395                    "(domain_range_index=%"PRIu32", low_id=%"PRIu32")\n",
 396                    range->rangenum, range->domsid, range->domain_range_index,
 397                    range->low_id));
 398
 399         return ret;
 400 }
 401
 402 /* initialize the given HWM to 0 if it does not exist yet */
 403 static NTSTATUS idmap_autorid_init_hwm_action(struct db_context *db,
 404                                               void *private_data)
 405 {
 406         NTSTATUS status;
 407         uint32_t hwmval;
 408         const char *hwm;
 409
 410         hwm = (char *)private_data;
 411
 412         status = dbwrap_fetch_uint32_bystring(db, hwm, &hwmval);
 413         if (NT_STATUS_IS_OK(status)) {
 414                 DEBUG(1, ("HWM (%s) already initialized in autorid database "
 415                           "(value %"PRIu32").\n", hwm, hwmval));
 416                 return NT_STATUS_OK;
 417         }
 418         if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 419                 DEBUG(0, ("Error fetching HWM (%s) from autorid "
 420                           "database: %s\n", hwm, nt_errstr(status)));
 421                 return status;
 422         }
 423
 424         status = dbwrap_trans_store_uint32_bystring(db, hwm, 0);
 425         if (!NT_STATUS_IS_OK(status)) {
 426                 DEBUG(0, ("Error storing HWM (%s) in autorid database: %s\n",
 427                           hwm, nt_errstr(status)));
 428                 return status;
 429         }
 430
 431         return NT_STATUS_OK;
 432 }
 433
 434 NTSTATUS idmap_autorid_init_hwm(struct db_context *db, const char *hwm)
 435 {
 436         NTSTATUS status;
 437         uint32_t hwmval;
 438
 439         status = dbwrap_fetch_uint32_bystring(db, hwm, &hwmval);
 440         if (NT_STATUS_IS_OK(status)) {
 441                 DEBUG(1, ("HWM (%s) already initialized in autorid database "
 442                           "(value %"PRIu32").\n", hwm, hwmval));
 443                 return NT_STATUS_OK;
 444         }
 445         if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 446                 DEBUG(0, ("unable to fetch HWM (%s) from autorid "
 447                           "database: %s\n", hwm,  nt_errstr(status)));
 448                 return status;
 449         }
 450
 451         status = dbwrap_trans_do(db, idmap_autorid_init_hwm_action,
 452                                  (void *)hwm);
 453         if (!NT_STATUS_IS_OK(status)) {
 454                 DEBUG(0, ("Error initializing HWM (%s) in autorid database: "
 455                           "%s\n", hwm, nt_errstr(status)));
 456                 return NT_STATUS_INTERNAL_DB_ERROR;
 457         }
 458
 459         DEBUG(1, ("Initialized HWM (%s) in autorid database.\n", hwm));
 460
 461         return NT_STATUS_OK;
 462 }
 463
 464 /*
 465  * Delete a domain#index <-> range mapping from the database.
 466  * The mapping is specified by the sid and index.
 467  * If force == true, invalid mapping records are deleted as far
 468  * as possible, otherwise they are left untouched.
 469  */
 470
 471 struct idmap_autorid_delete_range_by_sid_ctx {
 472         const char *domsid;
 473         uint32_t domain_range_index;
 474         bool force;
 475 };
 476
 477 static NTSTATUS idmap_autorid_delete_range_by_sid_action(struct db_context *db,
 478                                                          void *private_data)
 479 {
 480         struct idmap_autorid_delete_range_by_sid_ctx *ctx =
 481                 (struct idmap_autorid_delete_range_by_sid_ctx *)private_data;
 482         const char *domsid;
 483         uint32_t domain_range_index;
 484         uint32_t rangenum;
 485         char *keystr;
 486         char *range_keystr;
 487         TDB_DATA data;
 488         NTSTATUS status;
 489         TALLOC_CTX *frame = talloc_stackframe();
 490         bool is_valid_range_mapping = true;
 491         bool force;
 492
 493         domsid = ctx->domsid;
 494         domain_range_index = ctx->domain_range_index;
 495         force = ctx->force;
 496
 497         keystr = idmap_autorid_build_keystr_talloc(frame, domsid,
 498                                                    domain_range_index);
 499         if (keystr == NULL) {
 500                 status = NT_STATUS_NO_MEMORY;
 501                 goto done;
 502         }
 503
 504         status = dbwrap_fetch_uint32_bystring(db, keystr, &rangenum);
 505         if (!NT_STATUS_IS_OK(status)) {
 506                 goto done;
 507         }
 508
 509         range_keystr = talloc_asprintf(frame, "%"PRIu32, rangenum);
 510         if (range_keystr == NULL) {
 511                 status = NT_STATUS_NO_MEMORY;
 512                 goto done;
 513         }
 514
 515         status = dbwrap_fetch_bystring(db, frame, range_keystr, &data);
 516         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 517                 DEBUG(1, ("Incomplete mapping %s -> %s: no backward mapping\n",
 518                           keystr, range_keystr));
 519                 is_valid_range_mapping = false;
 520         } else if (!NT_STATUS_IS_OK(status)) {
 521                 DEBUG(1, ("Error fetching reverse mapping for %s -> %s:  %s\n",
 522                           keystr, range_keystr, nt_errstr(status)));
 523                 goto done;
 524         } else if (strncmp((const char *)data.dptr, keystr, strlen(keystr))
 525                    != 0)
 526         {
 527                 DEBUG(1, ("Invalid mapping: %s -> %s -> %s\n",
 528                           keystr, range_keystr, (const char *)data.dptr));
 529                 is_valid_range_mapping = false;
 530         }
 531
 532         if (!is_valid_range_mapping && !force) {
 533                 DEBUG(10, ("Not deleting invalid mapping, since not in force "
 534                            "mode.\n"));
 535                 status = NT_STATUS_FILE_INVALID;
 536                 goto done;
 537         }
 538
 539         status = dbwrap_delete_bystring(db, keystr);
 540         if (!NT_STATUS_IS_OK(status)) {
 541                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 542                           keystr, nt_errstr(status)));
 543                 goto done;
 544         }
 545
 546         if (!is_valid_range_mapping) {
 547                 goto done;
 548         }
 549
 550         status = dbwrap_delete_bystring(db, range_keystr);
 551         if (!NT_STATUS_IS_OK(status)) {
 552                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 553                           range_keystr, nt_errstr(status)));
 554                 goto done;
 555         }
 556
 557         DEBUG(10, ("Deleted range mapping %s <--> %s\n", keystr,
 558                    range_keystr));
 559
 560 done:
 561         TALLOC_FREE(frame);
 562         return status;
 563 }
 564
 565 NTSTATUS idmap_autorid_delete_range_by_sid(struct db_context *db,
 566                                            const char *domsid,
 567                                            uint32_t domain_range_index,
 568                                            bool force)
 569 {
 570         NTSTATUS status;
 571         struct idmap_autorid_delete_range_by_sid_ctx ctx;
 572
 573         ctx.domain_range_index = domain_range_index;
 574         ctx.domsid = domsid;
 575         ctx.force = force;
 576
 577         status = dbwrap_trans_do(db, idmap_autorid_delete_range_by_sid_action,
 578                                  &ctx);
 579         return status;
 580 }
 581
 582 /*
 583  * Delete a domain#index <-> range mapping from the database.
 584  * The mapping is specified by the range number.
 585  * If force == true, invalid mapping records are deleted as far
 586  * as possible, otherwise they are left untouched.
 587  */
 588 struct idmap_autorid_delete_range_by_num_ctx {
 589         uint32_t rangenum;
 590         bool force;
 591 };
 592
 593 static NTSTATUS idmap_autorid_delete_range_by_num_action(struct db_context *db,
 594                                                            void *private_data)
 595 {
 596         struct idmap_autorid_delete_range_by_num_ctx *ctx =
 597                 (struct idmap_autorid_delete_range_by_num_ctx *)private_data;
 598         uint32_t rangenum;
 599         char *keystr;
 600         char *range_keystr;
 601         TDB_DATA val;
 602         NTSTATUS status;
 603         TALLOC_CTX *frame = talloc_stackframe();
 604         bool is_valid_range_mapping = true;
 605         bool force;
 606
 607         rangenum = ctx->rangenum;
 608         force = ctx->force;
 609
 610         range_keystr = talloc_asprintf(frame, "%"PRIu32, rangenum);
 611         if (range_keystr == NULL) {
 612                 status = NT_STATUS_NO_MEMORY;
 613                 goto done;
 614         }
 615
 616         ZERO_STRUCT(val);
 617
 618         status = dbwrap_fetch_bystring(db, frame, range_keystr, &val);
 619         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 620                 DEBUG(10, ("Did not find range '%s' in database.\n",
 621                            range_keystr));
 622                 goto done;
 623         } else if (!NT_STATUS_IS_OK(status)) {
 624                 DEBUG(5, ("Error fetching rang key: %s\n", nt_errstr(status)));
 625                 goto done;
 626         }
 627
 628         if (val.dptr == NULL) {
 629                 DEBUG(1, ("Invalid mapping: %s -> empty value\n",
 630                           range_keystr));
 631                 is_valid_range_mapping = false;
 632         } else {
 633                 uint32_t reverse_rangenum = 0;
 634
 635                 keystr = (char *)val.dptr;
 636
 637                 status = dbwrap_fetch_uint32_bystring(db, keystr,
 638                                                       &reverse_rangenum);
 639                 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 640                         DEBUG(1, ("Incomplete mapping %s -> %s: "
 641                                   "no backward mapping\n",
 642                                   range_keystr, keystr));
 643                         is_valid_range_mapping = false;
 644                 } else if (!NT_STATUS_IS_OK(status)) {
 645                         DEBUG(1, ("Error fetching reverse mapping for "
 646                                   "%s -> %s: %s\n",
 647                                   range_keystr, keystr, nt_errstr(status)));
 648                         goto done;
 649                 } else if (rangenum != reverse_rangenum) {
 650                         is_valid_range_mapping = false;
 651                 }
 652         }
 653
 654         if (!is_valid_range_mapping && !force) {
 655                 DEBUG(10, ("Not deleting invalid mapping, since not in force "
 656                            "mode.\n"));
 657                 status = NT_STATUS_FILE_INVALID;
 658                 goto done;
 659         }
 660
 661         status = dbwrap_delete_bystring(db, range_keystr);
 662         if (!NT_STATUS_IS_OK(status)) {
 663                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 664                           range_keystr, nt_errstr(status)));
 665                 goto done;
 666         }
 667
 668         if (!is_valid_range_mapping) {
 669                 goto done;
 670         }
 671
 672         status = dbwrap_delete_bystring(db, keystr);
 673         if (!NT_STATUS_IS_OK(status)) {
 674                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 675                           keystr, nt_errstr(status)));
 676                 goto done;
 677         }
 678
 679         DEBUG(10, ("Deleted range mapping %s <--> %s\n", range_keystr,
 680                    keystr));
 681
 682 done:
 683         talloc_free(frame);
 684         return status;
 685 }
 686
 687 NTSTATUS idmap_autorid_delete_range_by_num(struct db_context *db,
 688                                            uint32_t rangenum,
 689                                            bool force)
 690 {
 691         NTSTATUS status;
 692         struct idmap_autorid_delete_range_by_num_ctx ctx;
 693
 694         ctx.rangenum = rangenum;
 695         ctx.force = force;
 696
 697         status = dbwrap_trans_do(db, idmap_autorid_delete_range_by_num_action,
 698                                  &ctx);
 699         return status;
 700 }
 701
 702 /*
 703  * open and initialize the database which stores the ranges for the domains
 704  */
 705 NTSTATUS idmap_autorid_db_init(const char *path,
 706                                TALLOC_CTX *mem_ctx,
 707                                struct db_context **db)
 708 {
 709         NTSTATUS status;
 710
 711         if (*db != NULL) {
 712                 /* its already open */
 713                 return NT_STATUS_OK;
 714         }
 715
 716         /* Open idmap repository */
 717         *db = db_open(mem_ctx, path, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644,
 718                       DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
 719
 720         if (*db == NULL) {
 721                 DEBUG(0, ("Unable to open idmap_autorid database '%s'\n", path));
 722                 return NT_STATUS_UNSUCCESSFUL;
 723         }
 724
 725         /* Initialize high water mark for the currently used range to 0 */
 726
 727         status = idmap_autorid_init_hwm(*db, HWM);
 728         NT_STATUS_NOT_OK_RETURN(status);
 729
 730         status = idmap_autorid_init_hwm(*db, ALLOC_HWM_UID);
 731         NT_STATUS_NOT_OK_RETURN(status);
 732
 733         status = idmap_autorid_init_hwm(*db, ALLOC_HWM_GID);
 734
 735         return status;
 736 }
 737
 738 struct idmap_autorid_fetch_config_state {
 739         TALLOC_CTX *mem_ctx;
 740         char *configstr;
 741 };
 742
 743 static void idmap_autorid_config_parser(TDB_DATA key, TDB_DATA value,
 744                                         void *private_data)
 745 {
 746         struct idmap_autorid_fetch_config_state *state;
 747
 748         state = (struct idmap_autorid_fetch_config_state *)private_data;
 749
 750         /*
 751          * strndup because we have non-nullterminated strings in the db
 752          */
 753         state->configstr = talloc_strndup(
 754                 state->mem_ctx, (const char *)value.dptr, value.dsize);
 755 }
 756
 757 NTSTATUS idmap_autorid_getconfigstr(struct db_context *db, TALLOC_CTX *mem_ctx,
 758                                     char **result)
 759 {
 760         TDB_DATA key;
 761         NTSTATUS status;
 762         struct idmap_autorid_fetch_config_state state;
 763
 764         if (result == NULL) {
 765                 return NT_STATUS_INVALID_PARAMETER;
 766         }
 767
 768         key = string_term_tdb_data(CONFIGKEY);
 769
 770         state.mem_ctx = mem_ctx;
 771         state.configstr = NULL;
 772
 773         status = dbwrap_parse_record(db, key, idmap_autorid_config_parser,
 774                                      &state);
 775         if (!NT_STATUS_IS_OK(status)) {
 776                 DEBUG(1, ("Error while retrieving config: %s\n",
 777                           nt_errstr(status)));
 778                 return status;
 779         }
 780
 781         if (state.configstr == NULL) {
 782                 DEBUG(1, ("Error while retrieving config\n"));
 783                 return NT_STATUS_NO_MEMORY;
 784         }
 785
 786         DEBUG(5, ("found CONFIG: %s\n", state.configstr));
 787
 788         *result = state.configstr;
 789         return NT_STATUS_OK;
 790 }
 791
 792 bool idmap_autorid_parse_configstr(const char *configstr,
 793                                    struct autorid_global_config *cfg)
 794 {
 795         unsigned long minvalue, rangesize, maxranges;
 796
 797         if (sscanf(configstr,
 798                    "minvalue:%lu rangesize:%lu maxranges:%lu",
 799                    &minvalue, &rangesize, &maxranges) != 3) {
 800                 DEBUG(1,
 801                       ("Found invalid configuration data. "
 802                        "Creating new config\n"));
 803                 return false;
 804         }
 805
 806         cfg->minvalue = minvalue;
 807         cfg->rangesize = rangesize;
 808         cfg->maxranges = maxranges;
 809
 810         return true;
 811 }
 812
 813 NTSTATUS idmap_autorid_loadconfig(struct db_context *db,
 814                                   TALLOC_CTX *mem_ctx,
 815                                   struct autorid_global_config **result)
 816 {
 817         struct autorid_global_config *cfg;
 818         NTSTATUS status;
 819         bool ok;
 820         char *configstr = NULL;
 821
 822         if (result == NULL) {
 823                 return NT_STATUS_INVALID_PARAMETER;
 824         }
 825
 826         status = idmap_autorid_getconfigstr(db, mem_ctx, &configstr);
 827         if (!NT_STATUS_IS_OK(status)) {
 828                 return status;
 829         }
 830
 831         cfg = talloc_zero(mem_ctx, struct autorid_global_config);
 832         if (cfg == NULL) {
 833                 return NT_STATUS_NO_MEMORY;
 834         }
 835
 836         ok = idmap_autorid_parse_configstr(configstr, cfg);
 837         if (!ok) {
 838                 talloc_free(cfg);
 839                 return NT_STATUS_INVALID_PARAMETER;
 840         }
 841
 842         DEBUG(10, ("Loaded previously stored configuration "
 843                    "minvalue:%d rangesize:%d\n",
 844                    cfg->minvalue, cfg->rangesize));
 845
 846         *result = cfg;
 847
 848         return NT_STATUS_OK;
 849 }
 850
 851 NTSTATUS idmap_autorid_saveconfig(struct db_context *db,
 852                                   struct autorid_global_config *cfg)
 853 {
 854
 855         struct autorid_global_config *storedconfig = NULL;
 856         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 857         TDB_DATA data;
 858         char *cfgstr;
 859         uint32_t hwm;
 860         TALLOC_CTX *frame = talloc_stackframe();
 861
 862         DEBUG(10, ("New configuration provided for storing is "
 863                    "minvalue:%d rangesize:%d maxranges:%d\n",
 864                    cfg->minvalue, cfg->rangesize, cfg->maxranges));
 865
 866         if (cfg->rangesize < 2000) {
 867                 DEBUG(1, ("autorid rangesize must be at least 2000\n"));
 868                 goto done;
 869         }
 870
 871         if (cfg->maxranges == 0) {
 872                 DEBUG(1, ("An autorid maxranges value of 0 is invalid. "
 873                           "Must have at least one range available.\n"));
 874                 goto done;
 875         }
 876
 877         status = idmap_autorid_loadconfig(db, frame, &storedconfig);
 878         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 879                 DEBUG(5, ("No configuration found. Storing initial "
 880                           "configuration.\n"));
 881         } else if (!NT_STATUS_IS_OK(status)) {
 882                 DEBUG(1, ("Error loading configuration: %s\n",
 883                           nt_errstr(status)));
 884                 goto done;
 885         }
 886
 887         /* did the minimum value or rangesize change? */
 888         if (storedconfig &&
 889             ((storedconfig->minvalue != cfg->minvalue) ||
 890              (storedconfig->rangesize != cfg->rangesize)))
 891         {
 892                 DEBUG(1, ("New configuration values for rangesize or "
 893                           "minimum uid value conflict with previously "
 894                           "used values! Not storing new config.\n"));
 895                 status = NT_STATUS_INVALID_PARAMETER;
 896                 goto done;
 897         }
 898
 899         status = dbwrap_fetch_uint32_bystring(db, HWM, &hwm);
 900         if (!NT_STATUS_IS_OK(status)) {
 901                 DEBUG(1, ("Fatal error while fetching current "
 902                           "HWM value: %s\n", nt_errstr(status)));
 903                 status = NT_STATUS_INTERNAL_ERROR;
 904                 goto done;
 905         }
 906
 907         /*
 908          * has the highest uid value been reduced to setting that is not
 909          * sufficient any more for already existing ranges?
 910          */
 911         if (hwm > cfg->maxranges) {
 912                 DEBUG(1, ("New upper uid limit is too low to cover "
 913                           "existing mappings! Not storing new config.\n"));
 914                 status = NT_STATUS_INVALID_PARAMETER;
 915                 goto done;
 916         }
 917
 918         cfgstr =
 919             talloc_asprintf(frame,
 920                             "minvalue:%u rangesize:%u maxranges:%u",
 921                             cfg->minvalue, cfg->rangesize, cfg->maxranges);
 922
 923         if (cfgstr == NULL) {
 924                 status = NT_STATUS_NO_MEMORY;
 925                 goto done;
 926         }
 927
 928         data = string_tdb_data(cfgstr);
 929
 930         status = dbwrap_trans_store_bystring(db, CONFIGKEY, data, TDB_REPLACE);
 931
 932 done:
 933         TALLOC_FREE(frame);
 934         return status;
 935 }
 936
 937 NTSTATUS idmap_autorid_saveconfigstr(struct db_context *db,
 938                                      const char *configstr)
 939 {
 940         bool ok;
 941         NTSTATUS status;
 942         struct autorid_global_config cfg;
 943
 944         ok = idmap_autorid_parse_configstr(configstr, &cfg);
 945         if (!ok) {
 946                 return NT_STATUS_INVALID_PARAMETER;
 947         }
 948
 949         status = idmap_autorid_saveconfig(db, &cfg);
 950         return status;
 951 }
 952
 953
 954 /*
 955  * iteration: Work on all range mappings for a given domain
 956  */
 957
 958 struct domain_range_visitor_ctx {
 959         const char *domsid;
 960         NTSTATUS (*fn)(struct db_context *db,
 961                        const char *domsid,
 962                        uint32_t index,
 963                        uint32_t rangenum,
 964                        void *private_data);
 965         void *private_data;
 966         int count; /* number of records worked on */
 967 };
 968
 969 static int idmap_autorid_visit_domain_range(struct db_record *rec,
 970                                             void *private_data)
 971 {
 972         struct domain_range_visitor_ctx *vi;
 973         char *domsid;
 974         char *sep;
 975         uint32_t range_index = 0;
 976         uint32_t rangenum = 0;
 977         TDB_DATA key, value;
 978         NTSTATUS status;
 979         int ret = 0;
 980         struct db_context *db;
 981
 982         vi = talloc_get_type_abort(private_data,
 983                                    struct domain_range_visitor_ctx);
 984
 985         key = dbwrap_record_get_key(rec);
 986
 987         /*
 988          * split string "<sid>[#<index>]" into sid string and index number
 989          */
 990
 991         domsid = (char *)key.dptr;
 992
 993         DEBUG(10, ("idmap_autorid_visit_domain_range: visiting key '%s'\n",
 994                    domsid));
 995
 996         sep = strrchr(domsid, '#');
 997         if (sep != NULL) {
 998                 char *index_str;
 999                 *sep = '\0';
1000                 index_str = sep+1;
1001                 if (sscanf(index_str, "%"SCNu32, &range_index) != 1) {
1002                         DEBUG(10, ("Found separator '#' but '%s' is not a "
1003                                    "valid range index. Skipping record\n",
1004                                    index_str));
1005                         goto done;
1006                 }
1007         }
1008
1009         if (!idmap_autorid_validate_sid(domsid)) {
1010                 DEBUG(10, ("String '%s' is not a valid sid. "
1011                            "Skipping record.\n", domsid));
1012                 goto done;
1013         }
1014
1015         if ((vi->domsid != NULL) && (strcmp(domsid, vi->domsid) != 0)) {
1016                 DEBUG(10, ("key sid '%s' does not match requested sid '%s'.\n",
1017                            domsid, vi->domsid));
1018                 goto done;
1019         }
1020
1021         value = dbwrap_record_get_value(rec);
1022
1023         if (value.dsize != sizeof(uint32_t)) {
1024                 /* it might be a mapping of a well known sid */
1025                 DEBUG(10, ("value size %u != sizeof(uint32_t) for sid '%s', "
1026                            "skipping.\n", (unsigned)value.dsize, vi->domsid));
1027                 goto done;
1028         }
1029
1030         rangenum = IVAL(value.dptr, 0);
1031
1032         db = dbwrap_record_get_db(rec);
1033
1034         status = vi->fn(db, domsid, range_index, rangenum, vi->private_data);
1035         if (!NT_STATUS_IS_OK(status)) {
1036                 ret = -1;
1037                 goto done;
1038         }
1039
1040         vi->count++;
1041         ret = 0;
1042
1043 done:
1044         return ret;
1045 }
1046
1047 static NTSTATUS idmap_autorid_iterate_domain_ranges_int(struct db_context *db,
1048                                 const char *domsid,
1049                                 NTSTATUS (*fn)(struct db_context *db,
1050                                                const char *domsid,
1051                                                uint32_t index,
1052                                                uint32_t rangnum,
1053                                                void *private_data),
1054                                 void *private_data,
1055                                 int *count,
1056                                 NTSTATUS (*traverse)(struct db_context *db,
1057                                           int (*f)(struct db_record *, void *),
1058                                           void *private_data,
1059                                           int *count))
1060 {
1061         NTSTATUS status;
1062         struct domain_range_visitor_ctx *vi;
1063         TALLOC_CTX *frame = talloc_stackframe();
1064
1065         if (domsid == NULL) {
1066                 DEBUG(10, ("No sid provided, operating on all ranges\n"));
1067         }
1068
1069         if (fn == NULL) {
1070                 DEBUG(1, ("Error: missing visitor callback\n"));
1071                 status = NT_STATUS_INVALID_PARAMETER;
1072                 goto done;
1073         }
1074
1075         vi = talloc_zero(frame, struct domain_range_visitor_ctx);
1076         if (vi == NULL) {
1077                 status = NT_STATUS_NO_MEMORY;
1078                 goto done;
1079         }
1080
1081         vi->domsid = domsid;
1082         vi->fn = fn;
1083         vi->private_data = private_data;
1084
1085         status = traverse(db, idmap_autorid_visit_domain_range, vi, NULL);
1086         if (!NT_STATUS_IS_OK(status)) {
1087                 goto done;
1088         }
1089
1090         if (count != NULL) {
1091                 *count = vi->count;
1092         }
1093
1094 done:
1095         talloc_free(frame);
1096         return status;
1097 }
1098
1099 NTSTATUS idmap_autorid_iterate_domain_ranges(struct db_context *db,
1100                                         const char *domsid,
1101                                         NTSTATUS (*fn)(struct db_context *db,
1102                                                        const char *domsid,
1103                                                        uint32_t index,
1104                                                        uint32_t rangenum,
1105                                                        void *private_data),
1106                                         void *private_data,
1107                                         int *count)
1108 {
1109         NTSTATUS status;
1110
1111         status = idmap_autorid_iterate_domain_ranges_int(db,
1112                                                          domsid,
1113                                                          fn,
1114                                                          private_data,
1115                                                          count,
1116                                                          dbwrap_traverse);
1117
1118         return status;
1119 }
1120
1121
1122 NTSTATUS idmap_autorid_iterate_domain_ranges_read(struct db_context *db,
1123                                         const char *domsid,
1124                                         NTSTATUS (*fn)(struct db_context *db,
1125                                                        const char *domsid,
1126                                                        uint32_t index,
1127                                                        uint32_t rangenum,
1128                                                        void *count),
1129                                         void *private_data,
1130                                         int *count)
1131 {
1132         NTSTATUS status;
1133
1134         status = idmap_autorid_iterate_domain_ranges_int(db,
1135                                                          domsid,
1136                                                          fn,
1137                                                          private_data,
1138                                                          count,
1139                                                          dbwrap_traverse_read);
1140
1141         return status;
1142 }
1143
1144
1145 /*
1146  * Delete all ranges configured for a given domain
1147  */
1148
1149 struct delete_domain_ranges_visitor_ctx {
1150         bool force;
1151 };
1152
1153 static NTSTATUS idmap_autorid_delete_domain_ranges_visitor(
1154                                                 struct db_context *db,
1155                                                 const char *domsid,
1156                                                 uint32_t domain_range_index,
1157                                                 uint32_t rangenum,
1158                                                 void *private_data)
1159 {
1160         struct delete_domain_ranges_visitor_ctx *ctx;
1161         NTSTATUS status;
1162
1163         ctx = (struct delete_domain_ranges_visitor_ctx *)private_data;
1164
1165         status = idmap_autorid_delete_range_by_sid(
1166                                 db, domsid, domain_range_index, ctx->force);
1167         return status;
1168 }
1169
1170 struct idmap_autorid_delete_domain_ranges_ctx {
1171         const char *domsid;
1172         bool force;
1173         int count; /* output: count records operated on */
1174 };
1175
1176 static NTSTATUS idmap_autorid_delete_domain_ranges_action(struct db_context *db,
1177                                                           void *private_data)
1178 {
1179         struct idmap_autorid_delete_domain_ranges_ctx *ctx;
1180         struct delete_domain_ranges_visitor_ctx visitor_ctx;
1181         int count;
1182         NTSTATUS status;
1183
1184         ctx = (struct idmap_autorid_delete_domain_ranges_ctx *)private_data;
1185
1186         ZERO_STRUCT(visitor_ctx);
1187         visitor_ctx.force = ctx->force;
1188
1189         status = idmap_autorid_iterate_domain_ranges(db,
1190                                 ctx->domsid,
1191                                 idmap_autorid_delete_domain_ranges_visitor,
1192                                 &visitor_ctx,
1193                                 &count);
1194         if (!NT_STATUS_IS_OK(status)) {
1195                 return status;
1196         }
1197
1198         ctx->count = count;
1199
1200         return NT_STATUS_OK;
1201 }
1202
1203 NTSTATUS idmap_autorid_delete_domain_ranges(struct db_context *db,
1204                                             const char *domsid,
1205                                             bool force,
1206                                             int *count)
1207 {
1208         NTSTATUS status;
1209         struct idmap_autorid_delete_domain_ranges_ctx ctx;
1210
1211         ZERO_STRUCT(ctx);
1212         ctx.domsid = domsid;
1213         ctx.force = force;
1214
1215         status = dbwrap_trans_do(db, idmap_autorid_delete_domain_ranges_action,
1216                                  &ctx);
1217         if (!NT_STATUS_IS_OK(status)) {
1218                 return status;
1219         }
1220
1221         *count = ctx.count;
1222
1223         return NT_STATUS_OK;
1224 }