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 record 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 possibly create the database.
 704  */
 705 NTSTATUS idmap_autorid_db_open(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         return status;
 726 }
 727
 728 /**
 729  * Initialize the high watermark records in the database.
 730  */
 731 NTSTATUS idmap_autorid_init_hwms(struct db_context *db)
 732 {
 733         NTSTATUS status;
 734
 735         status = idmap_autorid_init_hwm(db, HWM);
 736         if (!NT_STATUS_IS_OK(status)) {
 737                 return status;
 738         }
 739
 740         status = idmap_autorid_init_hwm(db, ALLOC_HWM_UID);
 741         if (!NT_STATUS_IS_OK(status)) {
 742                 return status;
 743         }
 744
 745         status = idmap_autorid_init_hwm(db, ALLOC_HWM_GID);
 746
 747         return status;
 748 }
 749
 750 NTSTATUS idmap_autorid_db_init(const char *path,
 751                                TALLOC_CTX *mem_ctx,
 752                                struct db_context **db)
 753 {
 754         NTSTATUS status;
 755
 756         status = idmap_autorid_db_open(path, mem_ctx, db);
 757         if (!NT_STATUS_IS_OK(status)) {
 758                 return status;
 759         }
 760
 761         status = idmap_autorid_init_hwms(*db);
 762         return status;
 763 }
 764
 765
 766
 767 struct idmap_autorid_fetch_config_state {
 768         TALLOC_CTX *mem_ctx;
 769         char *configstr;
 770 };
 771
 772 static void idmap_autorid_config_parser(TDB_DATA key, TDB_DATA value,
 773                                         void *private_data)
 774 {
 775         struct idmap_autorid_fetch_config_state *state;
 776
 777         state = (struct idmap_autorid_fetch_config_state *)private_data;
 778
 779         /*
 780          * strndup because we have non-nullterminated strings in the db
 781          */
 782         state->configstr = talloc_strndup(
 783                 state->mem_ctx, (const char *)value.dptr, value.dsize);
 784 }
 785
 786 NTSTATUS idmap_autorid_getconfigstr(struct db_context *db, TALLOC_CTX *mem_ctx,
 787                                     char **result)
 788 {
 789         TDB_DATA key;
 790         NTSTATUS status;
 791         struct idmap_autorid_fetch_config_state state;
 792
 793         if (result == NULL) {
 794                 return NT_STATUS_INVALID_PARAMETER;
 795         }
 796
 797         key = string_term_tdb_data(CONFIGKEY);
 798
 799         state.mem_ctx = mem_ctx;
 800         state.configstr = NULL;
 801
 802         status = dbwrap_parse_record(db, key, idmap_autorid_config_parser,
 803                                      &state);
 804         if (!NT_STATUS_IS_OK(status)) {
 805                 DEBUG(1, ("Error while retrieving config: %s\n",
 806                           nt_errstr(status)));
 807                 return status;
 808         }
 809
 810         if (state.configstr == NULL) {
 811                 DEBUG(1, ("Error while retrieving config\n"));
 812                 return NT_STATUS_NO_MEMORY;
 813         }
 814
 815         DEBUG(5, ("found CONFIG: %s\n", state.configstr));
 816
 817         *result = state.configstr;
 818         return NT_STATUS_OK;
 819 }
 820
 821 bool idmap_autorid_parse_configstr(const char *configstr,
 822                                    struct autorid_global_config *cfg)
 823 {
 824         unsigned long minvalue, rangesize, maxranges;
 825
 826         if (sscanf(configstr,
 827                    "minvalue:%lu rangesize:%lu maxranges:%lu",
 828                    &minvalue, &rangesize, &maxranges) != 3) {
 829                 DEBUG(1,
 830                       ("Found invalid configuration data. "
 831                        "Creating new config\n"));
 832                 return false;
 833         }
 834
 835         cfg->minvalue = minvalue;
 836         cfg->rangesize = rangesize;
 837         cfg->maxranges = maxranges;
 838
 839         return true;
 840 }
 841
 842 NTSTATUS idmap_autorid_loadconfig(struct db_context *db,
 843                                   TALLOC_CTX *mem_ctx,
 844                                   struct autorid_global_config **result)
 845 {
 846         struct autorid_global_config *cfg;
 847         NTSTATUS status;
 848         bool ok;
 849         char *configstr = NULL;
 850
 851         if (result == NULL) {
 852                 return NT_STATUS_INVALID_PARAMETER;
 853         }
 854
 855         status = idmap_autorid_getconfigstr(db, mem_ctx, &configstr);
 856         if (!NT_STATUS_IS_OK(status)) {
 857                 return status;
 858         }
 859
 860         cfg = talloc_zero(mem_ctx, struct autorid_global_config);
 861         if (cfg == NULL) {
 862                 return NT_STATUS_NO_MEMORY;
 863         }
 864
 865         ok = idmap_autorid_parse_configstr(configstr, cfg);
 866         if (!ok) {
 867                 talloc_free(cfg);
 868                 return NT_STATUS_INVALID_PARAMETER;
 869         }
 870
 871         DEBUG(10, ("Loaded previously stored configuration "
 872                    "minvalue:%d rangesize:%d\n",
 873                    cfg->minvalue, cfg->rangesize));
 874
 875         *result = cfg;
 876
 877         return NT_STATUS_OK;
 878 }
 879
 880 NTSTATUS idmap_autorid_saveconfig(struct db_context *db,
 881                                   struct autorid_global_config *cfg)
 882 {
 883
 884         struct autorid_global_config *storedconfig = NULL;
 885         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 886         TDB_DATA data;
 887         char *cfgstr;
 888         uint32_t hwm;
 889         TALLOC_CTX *frame = talloc_stackframe();
 890
 891         DEBUG(10, ("New configuration provided for storing is "
 892                    "minvalue:%d rangesize:%d maxranges:%d\n",
 893                    cfg->minvalue, cfg->rangesize, cfg->maxranges));
 894
 895         if (cfg->rangesize < 2000) {
 896                 DEBUG(1, ("autorid rangesize must be at least 2000\n"));
 897                 goto done;
 898         }
 899
 900         if (cfg->maxranges == 0) {
 901                 DEBUG(1, ("An autorid maxranges value of 0 is invalid. "
 902                           "Must have at least one range available.\n"));
 903                 goto done;
 904         }
 905
 906         status = idmap_autorid_loadconfig(db, frame, &storedconfig);
 907         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 908                 DEBUG(5, ("No configuration found. Storing initial "
 909                           "configuration.\n"));
 910         } else if (!NT_STATUS_IS_OK(status)) {
 911                 DEBUG(1, ("Error loading configuration: %s\n",
 912                           nt_errstr(status)));
 913                 goto done;
 914         }
 915
 916         /* did the minimum value or rangesize change? */
 917         if (storedconfig &&
 918             ((storedconfig->minvalue != cfg->minvalue) ||
 919              (storedconfig->rangesize != cfg->rangesize)))
 920         {
 921                 DEBUG(1, ("New configuration values for rangesize or "
 922                           "minimum uid value conflict with previously "
 923                           "used values! Not storing new config.\n"));
 924                 status = NT_STATUS_INVALID_PARAMETER;
 925                 goto done;
 926         }
 927
 928         status = dbwrap_fetch_uint32_bystring(db, HWM, &hwm);
 929         if (!NT_STATUS_IS_OK(status)) {
 930                 DEBUG(1, ("Fatal error while fetching current "
 931                           "HWM value: %s\n", nt_errstr(status)));
 932                 status = NT_STATUS_INTERNAL_ERROR;
 933                 goto done;
 934         }
 935
 936         /*
 937          * has the highest uid value been reduced to setting that is not
 938          * sufficient any more for already existing ranges?
 939          */
 940         if (hwm > cfg->maxranges) {
 941                 DEBUG(1, ("New upper uid limit is too low to cover "
 942                           "existing mappings! Not storing new config.\n"));
 943                 status = NT_STATUS_INVALID_PARAMETER;
 944                 goto done;
 945         }
 946
 947         cfgstr =
 948             talloc_asprintf(frame,
 949                             "minvalue:%u rangesize:%u maxranges:%u",
 950                             cfg->minvalue, cfg->rangesize, cfg->maxranges);
 951
 952         if (cfgstr == NULL) {
 953                 status = NT_STATUS_NO_MEMORY;
 954                 goto done;
 955         }
 956
 957         data = string_tdb_data(cfgstr);
 958
 959         status = dbwrap_trans_store_bystring(db, CONFIGKEY, data, TDB_REPLACE);
 960
 961 done:
 962         TALLOC_FREE(frame);
 963         return status;
 964 }
 965
 966 NTSTATUS idmap_autorid_saveconfigstr(struct db_context *db,
 967                                      const char *configstr)
 968 {
 969         bool ok;
 970         NTSTATUS status;
 971         struct autorid_global_config cfg;
 972
 973         ok = idmap_autorid_parse_configstr(configstr, &cfg);
 974         if (!ok) {
 975                 return NT_STATUS_INVALID_PARAMETER;
 976         }
 977
 978         status = idmap_autorid_saveconfig(db, &cfg);
 979         return status;
 980 }
 981
 982
 983 /*
 984  * iteration: Work on all range mappings for a given domain
 985  */
 986
 987 struct domain_range_visitor_ctx {
 988         const char *domsid;
 989         NTSTATUS (*fn)(struct db_context *db,
 990                        const char *domsid,
 991                        uint32_t index,
 992                        uint32_t rangenum,
 993                        void *private_data);
 994         void *private_data;
 995         int count; /* number of records worked on */
 996 };
 997
 998 static int idmap_autorid_visit_domain_range(struct db_record *rec,
 999                                             void *private_data)
1000 {
1001         struct domain_range_visitor_ctx *vi;
1002         char *domsid;
1003         char *sep;
1004         uint32_t range_index = 0;
1005         uint32_t rangenum = 0;
1006         TDB_DATA key, value;
1007         NTSTATUS status;
1008         int ret = 0;
1009         struct db_context *db;
1010
1011         vi = talloc_get_type_abort(private_data,
1012                                    struct domain_range_visitor_ctx);
1013
1014         key = dbwrap_record_get_key(rec);
1015
1016         /*
1017          * split string "<sid>[#<index>]" into sid string and index number
1018          */
1019
1020         domsid = (char *)key.dptr;
1021
1022         DEBUG(10, ("idmap_autorid_visit_domain_range: visiting key '%s'\n",
1023                    domsid));
1024
1025         sep = strrchr(domsid, '#');
1026         if (sep != NULL) {
1027                 char *index_str;
1028                 *sep = '\0';
1029                 index_str = sep+1;
1030                 if (sscanf(index_str, "%"SCNu32, &range_index) != 1) {
1031                         DEBUG(10, ("Found separator '#' but '%s' is not a "
1032                                    "valid range index. Skipping record\n",
1033                                    index_str));
1034                         goto done;
1035                 }
1036         }
1037
1038         if (!idmap_autorid_validate_sid(domsid)) {
1039                 DEBUG(10, ("String '%s' is not a valid sid. "
1040                            "Skipping record.\n", domsid));
1041                 goto done;
1042         }
1043
1044         if ((vi->domsid != NULL) && (strcmp(domsid, vi->domsid) != 0)) {
1045                 DEBUG(10, ("key sid '%s' does not match requested sid '%s'.\n",
1046                            domsid, vi->domsid));
1047                 goto done;
1048         }
1049
1050         value = dbwrap_record_get_value(rec);
1051
1052         if (value.dsize != sizeof(uint32_t)) {
1053                 /* it might be a mapping of a well known sid */
1054                 DEBUG(10, ("value size %u != sizeof(uint32_t) for sid '%s', "
1055                            "skipping.\n", (unsigned)value.dsize, vi->domsid));
1056                 goto done;
1057         }
1058
1059         rangenum = IVAL(value.dptr, 0);
1060
1061         db = dbwrap_record_get_db(rec);
1062
1063         status = vi->fn(db, domsid, range_index, rangenum, vi->private_data);
1064         if (!NT_STATUS_IS_OK(status)) {
1065                 ret = -1;
1066                 goto done;
1067         }
1068
1069         vi->count++;
1070         ret = 0;
1071
1072 done:
1073         return ret;
1074 }
1075
1076 static NTSTATUS idmap_autorid_iterate_domain_ranges_int(struct db_context *db,
1077                                 const char *domsid,
1078                                 NTSTATUS (*fn)(struct db_context *db,
1079                                                const char *domsid,
1080                                                uint32_t index,
1081                                                uint32_t rangnum,
1082                                                void *private_data),
1083                                 void *private_data,
1084                                 int *count,
1085                                 NTSTATUS (*traverse)(struct db_context *db,
1086                                           int (*f)(struct db_record *, void *),
1087                                           void *private_data,
1088                                           int *count))
1089 {
1090         NTSTATUS status;
1091         struct domain_range_visitor_ctx *vi;
1092         TALLOC_CTX *frame = talloc_stackframe();
1093
1094         if (domsid == NULL) {
1095                 DEBUG(10, ("No sid provided, operating on all ranges\n"));
1096         }
1097
1098         if (fn == NULL) {
1099                 DEBUG(1, ("Error: missing visitor callback\n"));
1100                 status = NT_STATUS_INVALID_PARAMETER;
1101                 goto done;
1102         }
1103
1104         vi = talloc_zero(frame, struct domain_range_visitor_ctx);
1105         if (vi == NULL) {
1106                 status = NT_STATUS_NO_MEMORY;
1107                 goto done;
1108         }
1109
1110         vi->domsid = domsid;
1111         vi->fn = fn;
1112         vi->private_data = private_data;
1113
1114         status = traverse(db, idmap_autorid_visit_domain_range, vi, NULL);
1115         if (!NT_STATUS_IS_OK(status)) {
1116                 goto done;
1117         }
1118
1119         if (count != NULL) {
1120                 *count = vi->count;
1121         }
1122
1123 done:
1124         talloc_free(frame);
1125         return status;
1126 }
1127
1128 NTSTATUS idmap_autorid_iterate_domain_ranges(struct db_context *db,
1129                                         const char *domsid,
1130                                         NTSTATUS (*fn)(struct db_context *db,
1131                                                        const char *domsid,
1132                                                        uint32_t index,
1133                                                        uint32_t rangenum,
1134                                                        void *private_data),
1135                                         void *private_data,
1136                                         int *count)
1137 {
1138         NTSTATUS status;
1139
1140         status = idmap_autorid_iterate_domain_ranges_int(db,
1141                                                          domsid,
1142                                                          fn,
1143                                                          private_data,
1144                                                          count,
1145                                                          dbwrap_traverse);
1146
1147         return status;
1148 }
1149
1150
1151 NTSTATUS idmap_autorid_iterate_domain_ranges_read(struct db_context *db,
1152                                         const char *domsid,
1153                                         NTSTATUS (*fn)(struct db_context *db,
1154                                                        const char *domsid,
1155                                                        uint32_t index,
1156                                                        uint32_t rangenum,
1157                                                        void *count),
1158                                         void *private_data,
1159                                         int *count)
1160 {
1161         NTSTATUS status;
1162
1163         status = idmap_autorid_iterate_domain_ranges_int(db,
1164                                                          domsid,
1165                                                          fn,
1166                                                          private_data,
1167                                                          count,
1168                                                          dbwrap_traverse_read);
1169
1170         return status;
1171 }
1172
1173
1174 /*
1175  * Delete all ranges configured for a given domain
1176  */
1177
1178 struct delete_domain_ranges_visitor_ctx {
1179         bool force;
1180 };
1181
1182 static NTSTATUS idmap_autorid_delete_domain_ranges_visitor(
1183                                                 struct db_context *db,
1184                                                 const char *domsid,
1185                                                 uint32_t domain_range_index,
1186                                                 uint32_t rangenum,
1187                                                 void *private_data)
1188 {
1189         struct delete_domain_ranges_visitor_ctx *ctx;
1190         NTSTATUS status;
1191
1192         ctx = (struct delete_domain_ranges_visitor_ctx *)private_data;
1193
1194         status = idmap_autorid_delete_range_by_sid(
1195                                 db, domsid, domain_range_index, ctx->force);
1196         return status;
1197 }
1198
1199 struct idmap_autorid_delete_domain_ranges_ctx {
1200         const char *domsid;
1201         bool force;
1202         int count; /* output: count records operated on */
1203 };
1204
1205 static NTSTATUS idmap_autorid_delete_domain_ranges_action(struct db_context *db,
1206                                                           void *private_data)
1207 {
1208         struct idmap_autorid_delete_domain_ranges_ctx *ctx;
1209         struct delete_domain_ranges_visitor_ctx visitor_ctx;
1210         int count;
1211         NTSTATUS status;
1212
1213         ctx = (struct idmap_autorid_delete_domain_ranges_ctx *)private_data;
1214
1215         ZERO_STRUCT(visitor_ctx);
1216         visitor_ctx.force = ctx->force;
1217
1218         status = idmap_autorid_iterate_domain_ranges(db,
1219                                 ctx->domsid,
1220                                 idmap_autorid_delete_domain_ranges_visitor,
1221                                 &visitor_ctx,
1222                                 &count);
1223         if (!NT_STATUS_IS_OK(status)) {
1224                 return status;
1225         }
1226
1227         ctx->count = count;
1228
1229         return NT_STATUS_OK;
1230 }
1231
1232 NTSTATUS idmap_autorid_delete_domain_ranges(struct db_context *db,
1233                                             const char *domsid,
1234                                             bool force,
1235                                             int *count)
1236 {
1237         NTSTATUS status;
1238         struct idmap_autorid_delete_domain_ranges_ctx ctx;
1239
1240         ZERO_STRUCT(ctx);
1241         ctx.domsid = domsid;
1242         ctx.force = force;
1243
1244         status = dbwrap_trans_do(db, idmap_autorid_delete_domain_ranges_action,
1245                                  &ctx);
1246         if (!NT_STATUS_IS_OK(status)) {
1247                 return status;
1248         }
1249
1250         *count = ctx.count;
1251
1252         return NT_STATUS_OK;
1253 }