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         if (requested_rangenum < hwm) {
 179                 /*
 180                  * Set a specified range below the HWM:
 181                  * We need to check that it is not yet taken.
 182                  */
 183
 184                 numstr = talloc_asprintf(mem_ctx, "%u", requested_rangenum);
 185                 if (!numstr) {
 186                         ret = NT_STATUS_NO_MEMORY;
 187                         goto error;
 188                 }
 189
 190                 if (dbwrap_exists(db, string_term_tdb_data(numstr))) {
 191                         DEBUG(1, ("Requested range already in use.\n"));
 192                         ret = NT_STATUS_INVALID_PARAMETER;
 193                         goto error;
 194                 }
 195
 196                 TALLOC_FREE(numstr);
 197         } else {
 198                 /*
 199                  * requested or automatic range >= HWM:
 200                  * increment the HWM.
 201                  */
 202
 203                 /* HWM always contains current max range + 1 */
 204                 increment = requested_rangenum + 1 - hwm;
 205
 206                 /* increase the HWM */
 207                 ret = dbwrap_change_uint32_atomic_bystring(db, HWM, &hwm,
 208                                                            increment);
 209                 if (!NT_STATUS_IS_OK(ret)) {
 210                         DEBUG(1, ("Fatal error while incrementing the HWM "
 211                                   "value in the database: %s\n",
 212                                   nt_errstr(ret)));
 213                         goto error;
 214                 }
 215         }
 216
 217         /*
 218          * store away the new mapping in both directions
 219          */
 220
 221         ret = dbwrap_store_uint32_bystring(db, keystr, requested_rangenum);
 222         if (!NT_STATUS_IS_OK(ret)) {
 223                 DEBUG(1, ("Fatal error while storing new "
 224                           "domain->range assignment: %s\n", nt_errstr(ret)));
 225                 goto error;
 226         }
 227
 228         numstr = talloc_asprintf(mem_ctx, "%u", requested_rangenum);
 229         if (!numstr) {
 230                 ret = NT_STATUS_NO_MEMORY;
 231                 goto error;
 232         }
 233
 234         ret = dbwrap_store_bystring(db, numstr,
 235                         string_term_tdb_data(keystr), TDB_INSERT);
 236
 237         if (!NT_STATUS_IS_OK(ret)) {
 238                 DEBUG(1, ("Fatal error while storing new "
 239                           "domain->range assignment: %s\n", nt_errstr(ret)));
 240                 goto error;
 241         }
 242         DEBUG(5, ("Acquired new range #%d for domain %s "
 243                   "(domain_range_index=%"PRIu32")\n", requested_rangenum, keystr,
 244                   range->domain_range_index));
 245
 246         range->rangenum = requested_rangenum;
 247
 248         range->low_id = globalcfg->minvalue
 249                       + range->rangenum * globalcfg->rangesize;
 250
 251         ret = NT_STATUS_OK;
 252
 253 error:
 254         talloc_free(mem_ctx);
 255         return ret;
 256 }
 257
 258 static NTSTATUS idmap_autorid_addrange(struct db_context *db,
 259                                        struct autorid_range_config *range,
 260                                        bool acquire)
 261 {
 262         NTSTATUS status;
 263         struct idmap_autorid_addrange_ctx ctx;
 264
 265         ctx.acquire = acquire;
 266         ctx.range = range;
 267
 268         status = dbwrap_trans_do(db, idmap_autorid_addrange_action, &ctx);
 269         return status;
 270 }
 271
 272 NTSTATUS idmap_autorid_setrange(struct db_context *db,
 273                                 const char *domsid,
 274                                 uint32_t domain_range_index,
 275                                 uint32_t rangenum)
 276 {
 277         NTSTATUS status;
 278         struct autorid_range_config range;
 279
 280         ZERO_STRUCT(range);
 281         fstrcpy(range.domsid, domsid);
 282         range.domain_range_index = domain_range_index;
 283         range.rangenum = rangenum;
 284
 285         status = idmap_autorid_addrange(db, &range, false);
 286         return status;
 287 }
 288
 289 static NTSTATUS idmap_autorid_acquire_range(struct db_context *db,
 290                                             struct autorid_range_config *range)
 291 {
 292         return idmap_autorid_addrange(db, range, true);
 293 }
 294
 295 static NTSTATUS idmap_autorid_getrange_int(struct db_context *db,
 296                                            struct autorid_range_config *range)
 297 {
 298         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 299         struct autorid_global_config *globalcfg = NULL;
 300         fstring keystr;
 301
 302         if (db == NULL || range == NULL) {
 303                 DEBUG(3, ("Invalid arguments received\n"));
 304                 goto done;
 305         }
 306
 307         if (!idmap_autorid_validate_sid(range->domsid)) {
 308                 DEBUG(3, ("Invalid SID: '%s'\n", range->domsid));
 309                 status = NT_STATUS_INVALID_PARAMETER;
 310                 goto done;
 311         }
 312
 313         idmap_autorid_build_keystr(range->domsid, range->domain_range_index,
 314                                    keystr);
 315
 316         DEBUG(10, ("reading domain range for key %s\n", keystr));
 317         status = dbwrap_fetch_uint32_bystring(db, keystr, &(range->rangenum));
 318         if (!NT_STATUS_IS_OK(status)) {
 319                 DEBUG(1, ("Failed to read database for key '%s': %s\n",
 320                           keystr, nt_errstr(status)));
 321                 goto done;
 322         }
 323
 324         status = idmap_autorid_loadconfig(db, talloc_tos(), &globalcfg);
 325         if (!NT_STATUS_IS_OK(status)) {
 326                 DEBUG(1, ("Failed to read global configuration"));
 327                 goto done;
 328         }
 329         range->low_id = globalcfg->minvalue
 330                       + range->rangenum * globalcfg->rangesize;
 331
 332         TALLOC_FREE(globalcfg);
 333 done:
 334         return status;
 335 }
 336
 337 NTSTATUS idmap_autorid_getrange(struct db_context *db,
 338                                 const char *domsid,
 339                                 uint32_t domain_range_index,
 340                                 uint32_t *rangenum,
 341                                 uint32_t *low_id)
 342 {
 343         NTSTATUS status;
 344         struct autorid_range_config range;
 345
 346         if (rangenum == NULL) {
 347                 return NT_STATUS_INVALID_PARAMETER;
 348         }
 349
 350         ZERO_STRUCT(range);
 351         fstrcpy(range.domsid, domsid);
 352         range.domain_range_index = domain_range_index;
 353
 354         status = idmap_autorid_getrange_int(db, &range);
 355         if (!NT_STATUS_IS_OK(status)) {
 356                 return status;
 357         }
 358
 359         *rangenum = range.rangenum;
 360
 361         if (low_id != NULL) {
 362                 *low_id = range.low_id;
 363         }
 364
 365         return NT_STATUS_OK;
 366 }
 367
 368 NTSTATUS idmap_autorid_get_domainrange(struct db_context *db,
 369                                        struct autorid_range_config *range,
 370                                        bool read_only)
 371 {
 372         NTSTATUS ret;
 373
 374         ret = idmap_autorid_getrange_int(db, range);
 375         if (!NT_STATUS_IS_OK(ret)) {
 376                 if (read_only) {
 377                         return NT_STATUS_NOT_FOUND;
 378                 }
 379
 380                 ret = idmap_autorid_acquire_range(db, range);
 381         }
 382
 383         DEBUG(10, ("Using range #%d for domain %s "
 384                    "(domain_range_index=%"PRIu32", low_id=%"PRIu32")\n",
 385                    range->rangenum, range->domsid, range->domain_range_index,
 386                    range->low_id));
 387
 388         return ret;
 389 }
 390
 391 /* initialize the given HWM to 0 if it does not exist yet */
 392 NTSTATUS idmap_autorid_init_hwm(struct db_context *db, const char *hwm)
 393 {
 394         NTSTATUS status;
 395         uint32_t hwmval;
 396
 397         status = dbwrap_fetch_uint32_bystring(db, hwm, &hwmval);
 398         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND))  {
 399                 status = dbwrap_trans_store_uint32_bystring(db, hwm, 0);
 400                 if (!NT_STATUS_IS_OK(status)) {
 401                         DEBUG(0,
 402                               ("Unable to initialise HWM (%s) in autorid "
 403                                "database: %s\n", hwm, nt_errstr(status)));
 404                         return NT_STATUS_INTERNAL_DB_ERROR;
 405                 }
 406         } else if (!NT_STATUS_IS_OK(status)) {
 407                 DEBUG(0, ("unable to fetch HWM (%s) from autorid "
 408                           "database: %s\n", hwm,  nt_errstr(status)));
 409                 return status;
 410         }
 411
 412         return NT_STATUS_OK;
 413 }
 414
 415 /*
 416  * Delete a domain#index <-> range mapping from the database.
 417  * The mapping is specified by the sid and index.
 418  * If force == true, invalid mapping records are deleted as far
 419  * as possible, otherwise they are left untouched.
 420  */
 421
 422 struct idmap_autorid_delete_range_by_sid_ctx {
 423         const char *domsid;
 424         uint32_t domain_range_index;
 425         bool force;
 426 };
 427
 428 static NTSTATUS idmap_autorid_delete_range_by_sid_action(struct db_context *db,
 429                                                          void *private_data)
 430 {
 431         struct idmap_autorid_delete_range_by_sid_ctx *ctx =
 432                 (struct idmap_autorid_delete_range_by_sid_ctx *)private_data;
 433         const char *domsid;
 434         uint32_t domain_range_index;
 435         uint32_t rangenum;
 436         char *keystr;
 437         char *range_keystr;
 438         TDB_DATA data;
 439         NTSTATUS status;
 440         TALLOC_CTX *frame = talloc_stackframe();
 441         bool is_valid_range_mapping = true;
 442         bool force;
 443
 444         domsid = ctx->domsid;
 445         domain_range_index = ctx->domain_range_index;
 446         force = ctx->force;
 447
 448         keystr = idmap_autorid_build_keystr_talloc(frame, domsid,
 449                                                    domain_range_index);
 450         if (keystr == NULL) {
 451                 status = NT_STATUS_NO_MEMORY;
 452                 goto done;
 453         }
 454
 455         status = dbwrap_fetch_uint32_bystring(db, keystr, &rangenum);
 456         if (!NT_STATUS_IS_OK(status)) {
 457                 goto done;
 458         }
 459
 460         range_keystr = talloc_asprintf(frame, "%"PRIu32, rangenum);
 461         if (range_keystr == NULL) {
 462                 status = NT_STATUS_NO_MEMORY;
 463                 goto done;
 464         }
 465
 466         status = dbwrap_fetch_bystring(db, frame, range_keystr, &data);
 467         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 468                 DEBUG(1, ("Incomplete mapping %s -> %s: no backward mapping\n",
 469                           keystr, range_keystr));
 470                 is_valid_range_mapping = false;
 471         } else if (!NT_STATUS_IS_OK(status)) {
 472                 DEBUG(1, ("Error fetching reverse mapping for %s -> %s:  %s\n",
 473                           keystr, range_keystr, nt_errstr(status)));
 474                 goto done;
 475         } else if (strncmp((const char *)data.dptr, keystr, strlen(keystr))
 476                    != 0)
 477         {
 478                 DEBUG(1, ("Invalid mapping: %s -> %s -> %s\n",
 479                           keystr, range_keystr, (const char *)data.dptr));
 480                 is_valid_range_mapping = false;
 481         }
 482
 483         if (!is_valid_range_mapping && !force) {
 484                 DEBUG(10, ("Not deleting invalid mapping, since not in force "
 485                            "mode.\n"));
 486                 status = NT_STATUS_FILE_INVALID;
 487                 goto done;
 488         }
 489
 490         status = dbwrap_delete_bystring(db, keystr);
 491         if (!NT_STATUS_IS_OK(status)) {
 492                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 493                           keystr, nt_errstr(status)));
 494                 goto done;
 495         }
 496
 497         if (!is_valid_range_mapping) {
 498                 goto done;
 499         }
 500
 501         status = dbwrap_delete_bystring(db, range_keystr);
 502         if (!NT_STATUS_IS_OK(status)) {
 503                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 504                           range_keystr, nt_errstr(status)));
 505                 goto done;
 506         }
 507
 508         DEBUG(10, ("Deleted range mapping %s <--> %s\n", keystr,
 509                    range_keystr));
 510
 511 done:
 512         TALLOC_FREE(frame);
 513         return status;
 514 }
 515
 516 NTSTATUS idmap_autorid_delete_range_by_sid(struct db_context *db,
 517                                            const char *domsid,
 518                                            uint32_t domain_range_index,
 519                                            bool force)
 520 {
 521         NTSTATUS status;
 522         struct idmap_autorid_delete_range_by_sid_ctx ctx;
 523
 524         ctx.domain_range_index = domain_range_index;
 525         ctx.domsid = domsid;
 526         ctx.force = force;
 527
 528         status = dbwrap_trans_do(db, idmap_autorid_delete_range_by_sid_action,
 529                                  &ctx);
 530         return status;
 531 }
 532
 533 /*
 534  * Delete a domain#index <-> range mapping from the database.
 535  * The mapping is specified by the range number.
 536  * If force == true, invalid mapping records are deleted as far
 537  * as possible, otherwise they are left untouched.
 538  */
 539 struct idmap_autorid_delete_range_by_num_ctx {
 540         uint32_t rangenum;
 541         bool force;
 542 };
 543
 544 static NTSTATUS idmap_autorid_delete_range_by_num_action(struct db_context *db,
 545                                                            void *private_data)
 546 {
 547         struct idmap_autorid_delete_range_by_num_ctx *ctx =
 548                 (struct idmap_autorid_delete_range_by_num_ctx *)private_data;
 549         uint32_t rangenum;
 550         char *keystr;
 551         char *range_keystr;
 552         TDB_DATA val;
 553         NTSTATUS status;
 554         TALLOC_CTX *frame = talloc_stackframe();
 555         bool is_valid_range_mapping = true;
 556         bool force;
 557
 558         rangenum = ctx->rangenum;
 559         force = ctx->force;
 560
 561         range_keystr = talloc_asprintf(frame, "%"PRIu32, rangenum);
 562         if (range_keystr == NULL) {
 563                 status = NT_STATUS_NO_MEMORY;
 564                 goto done;
 565         }
 566
 567         ZERO_STRUCT(val);
 568
 569         status = dbwrap_fetch_bystring(db, frame, range_keystr, &val);
 570         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 571                 DEBUG(10, ("Did not find range '%s' in database.\n",
 572                            range_keystr));
 573                 goto done;
 574         } else if (!NT_STATUS_IS_OK(status)) {
 575                 DEBUG(5, ("Error fetching rang key: %s\n", nt_errstr(status)));
 576                 goto done;
 577         }
 578
 579         if (val.dptr == NULL) {
 580                 DEBUG(1, ("Invalid mapping: %s -> empty value\n",
 581                           range_keystr));
 582                 is_valid_range_mapping = false;
 583         } else {
 584                 uint32_t reverse_rangenum = 0;
 585
 586                 keystr = (char *)val.dptr;
 587
 588                 status = dbwrap_fetch_uint32_bystring(db, keystr,
 589                                                       &reverse_rangenum);
 590                 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 591                         DEBUG(1, ("Incomplete mapping %s -> %s: "
 592                                   "no backward mapping\n",
 593                                   range_keystr, keystr));
 594                         is_valid_range_mapping = false;
 595                 } else if (!NT_STATUS_IS_OK(status)) {
 596                         DEBUG(1, ("Error fetching reverse mapping for "
 597                                   "%s -> %s: %s\n",
 598                                   range_keystr, keystr, nt_errstr(status)));
 599                         goto done;
 600                 } else if (rangenum != reverse_rangenum) {
 601                         is_valid_range_mapping = false;
 602                 }
 603         }
 604
 605         if (!is_valid_range_mapping && !force) {
 606                 DEBUG(10, ("Not deleting invalid mapping, since not in force "
 607                            "mode.\n"));
 608                 status = NT_STATUS_FILE_INVALID;
 609                 goto done;
 610         }
 611
 612         status = dbwrap_delete_bystring(db, range_keystr);
 613         if (!NT_STATUS_IS_OK(status)) {
 614                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 615                           range_keystr, nt_errstr(status)));
 616                 goto done;
 617         }
 618
 619         if (!is_valid_range_mapping) {
 620                 goto done;
 621         }
 622
 623         status = dbwrap_delete_bystring(db, keystr);
 624         if (!NT_STATUS_IS_OK(status)) {
 625                 DEBUG(1, ("Deletion of '%s' failed: %s\n",
 626                           keystr, nt_errstr(status)));
 627                 goto done;
 628         }
 629
 630         DEBUG(10, ("Deleted range mapping %s <--> %s\n", range_keystr,
 631                    keystr));
 632
 633 done:
 634         talloc_free(frame);
 635         return status;
 636 }
 637
 638 NTSTATUS idmap_autorid_delete_range_by_num(struct db_context *db,
 639                                            uint32_t rangenum,
 640                                            bool force)
 641 {
 642         NTSTATUS status;
 643         struct idmap_autorid_delete_range_by_num_ctx ctx;
 644
 645         ctx.rangenum = rangenum;
 646         ctx.force = force;
 647
 648         status = dbwrap_trans_do(db, idmap_autorid_delete_range_by_num_action,
 649                                  &ctx);
 650         return status;
 651 }
 652
 653 /*
 654  * open and initialize the database which stores the ranges for the domains
 655  */
 656 NTSTATUS idmap_autorid_db_init(const char *path,
 657                                TALLOC_CTX *mem_ctx,
 658                                struct db_context **db)
 659 {
 660         NTSTATUS status;
 661
 662         if (*db != NULL) {
 663                 /* its already open */
 664                 return NT_STATUS_OK;
 665         }
 666
 667         /* Open idmap repository */
 668         *db = db_open(mem_ctx, path, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644,
 669                       DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
 670
 671         if (*db == NULL) {
 672                 DEBUG(0, ("Unable to open idmap_autorid database '%s'\n", path));
 673                 return NT_STATUS_UNSUCCESSFUL;
 674         }
 675
 676         /* Initialize high water mark for the currently used range to 0 */
 677
 678         status = idmap_autorid_init_hwm(*db, HWM);
 679         NT_STATUS_NOT_OK_RETURN(status);
 680
 681         status = idmap_autorid_init_hwm(*db, ALLOC_HWM_UID);
 682         NT_STATUS_NOT_OK_RETURN(status);
 683
 684         status = idmap_autorid_init_hwm(*db, ALLOC_HWM_GID);
 685
 686         return status;
 687 }
 688
 689 struct idmap_autorid_fetch_config_state {
 690         TALLOC_CTX *mem_ctx;
 691         char *configstr;
 692 };
 693
 694 static void idmap_autorid_config_parser(TDB_DATA key, TDB_DATA value,
 695                                         void *private_data)
 696 {
 697         struct idmap_autorid_fetch_config_state *state;
 698
 699         state = (struct idmap_autorid_fetch_config_state *)private_data;
 700
 701         /*
 702          * strndup because we have non-nullterminated strings in the db
 703          */
 704         state->configstr = talloc_strndup(
 705                 state->mem_ctx, (const char *)value.dptr, value.dsize);
 706 }
 707
 708 NTSTATUS idmap_autorid_getconfigstr(struct db_context *db, TALLOC_CTX *mem_ctx,
 709                                     char **result)
 710 {
 711         TDB_DATA key;
 712         NTSTATUS status;
 713         struct idmap_autorid_fetch_config_state state;
 714
 715         if (result == NULL) {
 716                 return NT_STATUS_INVALID_PARAMETER;
 717         }
 718
 719         key = string_term_tdb_data(CONFIGKEY);
 720
 721         state.mem_ctx = mem_ctx;
 722         state.configstr = NULL;
 723
 724         status = dbwrap_parse_record(db, key, idmap_autorid_config_parser,
 725                                      &state);
 726         if (!NT_STATUS_IS_OK(status)) {
 727                 DEBUG(1, ("Error while retrieving config: %s\n",
 728                           nt_errstr(status)));
 729                 return status;
 730         }
 731
 732         if (state.configstr == NULL) {
 733                 DEBUG(1, ("Error while retrieving config\n"));
 734                 return NT_STATUS_NO_MEMORY;
 735         }
 736
 737         DEBUG(5, ("found CONFIG: %s\n", state.configstr));
 738
 739         *result = state.configstr;
 740         return NT_STATUS_OK;
 741 }
 742
 743 bool idmap_autorid_parse_configstr(const char *configstr,
 744                                    struct autorid_global_config *cfg)
 745 {
 746         unsigned long minvalue, rangesize, maxranges;
 747
 748         if (sscanf(configstr,
 749                    "minvalue:%lu rangesize:%lu maxranges:%lu",
 750                    &minvalue, &rangesize, &maxranges) != 3) {
 751                 DEBUG(1,
 752                       ("Found invalid configuration data. "
 753                        "Creating new config\n"));
 754                 return false;
 755         }
 756
 757         cfg->minvalue = minvalue;
 758         cfg->rangesize = rangesize;
 759         cfg->maxranges = maxranges;
 760
 761         return true;
 762 }
 763
 764 NTSTATUS idmap_autorid_loadconfig(struct db_context *db,
 765                                   TALLOC_CTX *mem_ctx,
 766                                   struct autorid_global_config **result)
 767 {
 768         struct autorid_global_config *cfg;
 769         NTSTATUS status;
 770         bool ok;
 771         char *configstr = NULL;
 772
 773         if (result == NULL) {
 774                 return NT_STATUS_INVALID_PARAMETER;
 775         }
 776
 777         status = idmap_autorid_getconfigstr(db, mem_ctx, &configstr);
 778         if (!NT_STATUS_IS_OK(status)) {
 779                 return status;
 780         }
 781
 782         cfg = talloc_zero(mem_ctx, struct autorid_global_config);
 783         if (cfg == NULL) {
 784                 return NT_STATUS_NO_MEMORY;
 785         }
 786
 787         ok = idmap_autorid_parse_configstr(configstr, cfg);
 788         if (!ok) {
 789                 talloc_free(cfg);
 790                 return NT_STATUS_INVALID_PARAMETER;
 791         }
 792
 793         DEBUG(10, ("Loaded previously stored configuration "
 794                    "minvalue:%d rangesize:%d\n",
 795                    cfg->minvalue, cfg->rangesize));
 796
 797         *result = cfg;
 798
 799         return NT_STATUS_OK;
 800 }
 801
 802 NTSTATUS idmap_autorid_saveconfig(struct db_context *db,
 803                                   struct autorid_global_config *cfg)
 804 {
 805
 806         struct autorid_global_config *storedconfig = NULL;
 807         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 808         TDB_DATA data;
 809         char *cfgstr;
 810         uint32_t hwm;
 811         TALLOC_CTX *frame = talloc_stackframe();
 812
 813         DEBUG(10, ("New configuration provided for storing is "
 814                    "minvalue:%d rangesize:%d maxranges:%d\n",
 815                    cfg->minvalue, cfg->rangesize, cfg->maxranges));
 816
 817         if (cfg->rangesize < 2000) {
 818                 DEBUG(1, ("autorid rangesize must be at least 2000\n"));
 819                 goto done;
 820         }
 821
 822         if (cfg->maxranges == 0) {
 823                 DEBUG(1, ("An autorid maxranges value of 0 is invalid. "
 824                           "Must have at least one range available.\n"));
 825                 goto done;
 826         }
 827
 828         status = idmap_autorid_loadconfig(db, frame, &storedconfig);
 829         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 830                 DEBUG(5, ("No configuration found. Storing initial "
 831                           "configuration.\n"));
 832         } else if (!NT_STATUS_IS_OK(status)) {
 833                 goto done;
 834         }
 835
 836         /* did the minimum value or rangesize change? */
 837         if (storedconfig &&
 838             ((storedconfig->minvalue != cfg->minvalue) ||
 839              (storedconfig->rangesize != cfg->rangesize)))
 840         {
 841                 DEBUG(1, ("New configuration values for rangesize or "
 842                           "minimum uid value conflict with previously "
 843                           "used values! Not storing new config.\n"));
 844                 status = NT_STATUS_INVALID_PARAMETER;
 845                 goto done;
 846         }
 847
 848         status = dbwrap_fetch_uint32_bystring(db, HWM, &hwm);
 849         if (!NT_STATUS_IS_OK(status)) {
 850                 DEBUG(1, ("Fatal error while fetching current "
 851                           "HWM value: %s\n", nt_errstr(status)));
 852                 status = NT_STATUS_INTERNAL_ERROR;
 853                 goto done;
 854         }
 855
 856         /*
 857          * has the highest uid value been reduced to setting that is not
 858          * sufficient any more for already existing ranges?
 859          */
 860         if (hwm > cfg->maxranges) {
 861                 DEBUG(1, ("New upper uid limit is too low to cover "
 862                           "existing mappings! Not storing new config.\n"));
 863                 status = NT_STATUS_INVALID_PARAMETER;
 864                 goto done;
 865         }
 866
 867         cfgstr =
 868             talloc_asprintf(frame,
 869                             "minvalue:%u rangesize:%u maxranges:%u",
 870                             cfg->minvalue, cfg->rangesize, cfg->maxranges);
 871
 872         if (cfgstr == NULL) {
 873                 status = NT_STATUS_NO_MEMORY;
 874                 goto done;
 875         }
 876
 877         data = string_tdb_data(cfgstr);
 878
 879         status = dbwrap_trans_store_bystring(db, CONFIGKEY, data, TDB_REPLACE);
 880
 881 done:
 882         TALLOC_FREE(frame);
 883         return status;
 884 }
 885
 886 NTSTATUS idmap_autorid_saveconfigstr(struct db_context *db,
 887                                      const char *configstr)
 888 {
 889         bool ok;
 890         NTSTATUS status;
 891         struct autorid_global_config cfg;
 892
 893         ok = idmap_autorid_parse_configstr(configstr, &cfg);
 894         if (!ok) {
 895                 return NT_STATUS_INVALID_PARAMETER;
 896         }
 897
 898         status = idmap_autorid_saveconfig(db, &cfg);
 899         return status;
 900 }
 901
 902
 903 /*
 904  * iteration: Work on all range mappings for a given domain
 905  */
 906
 907 struct domain_range_visitor_ctx {
 908         const char *domsid;
 909         NTSTATUS (*fn)(struct db_context *db,
 910                        const char *domsid,
 911                        uint32_t index,
 912                        uint32_t rangenum,
 913                        void *private_data);
 914         void *private_data;
 915         int count; /* number of records worked on */
 916 };
 917
 918 static int idmap_autorid_visit_domain_range(struct db_record *rec,
 919                                             void *private_data)
 920 {
 921         struct domain_range_visitor_ctx *vi;
 922         char *domsid;
 923         char *sep;
 924         uint32_t range_index = 0;
 925         uint32_t rangenum = 0;
 926         TDB_DATA key, value;
 927         NTSTATUS status;
 928         int ret = 0;
 929         struct db_context *db;
 930
 931         vi = talloc_get_type_abort(private_data,
 932                                    struct domain_range_visitor_ctx);
 933
 934         key = dbwrap_record_get_key(rec);
 935
 936         /*
 937          * split string "<sid>[#<index>]" into sid string and index number
 938          */
 939
 940         domsid = (char *)key.dptr;
 941
 942         DEBUG(10, ("idmap_autorid_visit_domain_range: visiting key '%s'\n",
 943                    domsid));
 944
 945         sep = strrchr(domsid, '#');
 946         if (sep != NULL) {
 947                 char *index_str;
 948                 *sep = '\0';
 949                 index_str = sep+1;
 950                 if (sscanf(index_str, "%"SCNu32, &range_index) != 1) {
 951                         DEBUG(10, ("Found separator '#' but '%s' is not a "
 952                                    "valid range index. Skipping record\n",
 953                                    index_str));
 954                         goto done;
 955                 }
 956         }
 957
 958         if (!idmap_autorid_validate_sid(domsid)) {
 959                 DEBUG(10, ("String '%s' is not a valid sid. "
 960                            "Skipping record.\n", domsid));
 961                 goto done;
 962         }
 963
 964         if ((vi->domsid != NULL) && (strcmp(domsid, vi->domsid) != 0)) {
 965                 DEBUG(10, ("key sid '%s' does not match requested sid '%s'.\n",
 966                            domsid, vi->domsid));
 967                 goto done;
 968         }
 969
 970         value = dbwrap_record_get_value(rec);
 971
 972         if (value.dsize != sizeof(uint32_t)) {
 973                 /* it might be a mapping of a well known sid */
 974                 DEBUG(10, ("value size %u != sizeof(uint32_t) for sid '%s', "
 975                            "skipping.\n", (unsigned)value.dsize, vi->domsid));
 976                 goto done;
 977         }
 978
 979         rangenum = IVAL(value.dptr, 0);
 980
 981         db = dbwrap_record_get_db(rec);
 982
 983         status = vi->fn(db, domsid, range_index, rangenum, vi->private_data);
 984         if (!NT_STATUS_IS_OK(status)) {
 985                 ret = -1;
 986                 goto done;
 987         }
 988
 989         vi->count++;
 990         ret = 0;
 991
 992 done:
 993         return ret;
 994 }
 995
 996 static NTSTATUS idmap_autorid_iterate_domain_ranges_int(struct db_context *db,
 997                                 const char *domsid,
 998                                 NTSTATUS (*fn)(struct db_context *db,
 999                                                const char *domsid,
1000                                                uint32_t index,
1001                                                uint32_t rangnum,
1002                                                void *private_data),
1003                                 void *private_data,
1004                                 int *count,
1005                                 NTSTATUS (*traverse)(struct db_context *db,
1006                                           int (*f)(struct db_record *, void *),
1007                                           void *private_data,
1008                                           int *count))
1009 {
1010         NTSTATUS status;
1011         struct domain_range_visitor_ctx *vi;
1012         TALLOC_CTX *frame = talloc_stackframe();
1013
1014         if (domsid == NULL) {
1015                 DEBUG(10, ("No sid provided, operating on all ranges\n"));
1016         }
1017
1018         if (fn == NULL) {
1019                 DEBUG(1, ("Error: missing visitor callback\n"));
1020                 status = NT_STATUS_INVALID_PARAMETER;
1021                 goto done;
1022         }
1023
1024         vi = talloc_zero(frame, struct domain_range_visitor_ctx);
1025         if (vi == NULL) {
1026                 status = NT_STATUS_NO_MEMORY;
1027                 goto done;
1028         }
1029
1030         vi->domsid = domsid;
1031         vi->fn = fn;
1032         vi->private_data = private_data;
1033
1034         status = traverse(db, idmap_autorid_visit_domain_range, vi, NULL);
1035         if (!NT_STATUS_IS_OK(status)) {
1036                 goto done;
1037         }
1038
1039         if (count != NULL) {
1040                 *count = vi->count;
1041         }
1042
1043 done:
1044         talloc_free(frame);
1045         return status;
1046 }
1047
1048 NTSTATUS idmap_autorid_iterate_domain_ranges(struct db_context *db,
1049                                         const char *domsid,
1050                                         NTSTATUS (*fn)(struct db_context *db,
1051                                                        const char *domsid,
1052                                                        uint32_t index,
1053                                                        uint32_t rangenum,
1054                                                        void *private_data),
1055                                         void *private_data,
1056                                         int *count)
1057 {
1058         NTSTATUS status;
1059
1060         status = idmap_autorid_iterate_domain_ranges_int(db,
1061                                                          domsid,
1062                                                          fn,
1063                                                          private_data,
1064                                                          count,
1065                                                          dbwrap_traverse);
1066
1067         return status;
1068 }
1069
1070
1071 NTSTATUS idmap_autorid_iterate_domain_ranges_read(struct db_context *db,
1072                                         const char *domsid,
1073                                         NTSTATUS (*fn)(struct db_context *db,
1074                                                        const char *domsid,
1075                                                        uint32_t index,
1076                                                        uint32_t rangenum,
1077                                                        void *count),
1078                                         void *private_data,
1079                                         int *count)
1080 {
1081         NTSTATUS status;
1082
1083         status = idmap_autorid_iterate_domain_ranges_int(db,
1084                                                          domsid,
1085                                                          fn,
1086                                                          private_data,
1087                                                          count,
1088                                                          dbwrap_traverse_read);
1089
1090         return status;
1091 }
1092
1093
1094 /*
1095  * Delete all ranges configured for a given domain
1096  */
1097
1098 struct delete_domain_ranges_visitor_ctx {
1099         bool force;
1100 };
1101
1102 static NTSTATUS idmap_autorid_delete_domain_ranges_visitor(
1103                                                 struct db_context *db,
1104                                                 const char *domsid,
1105                                                 uint32_t domain_range_index,
1106                                                 uint32_t rangenum,
1107                                                 void *private_data)
1108 {
1109         struct delete_domain_ranges_visitor_ctx *ctx;
1110         NTSTATUS status;
1111
1112         ctx = (struct delete_domain_ranges_visitor_ctx *)private_data;
1113
1114         status = idmap_autorid_delete_range_by_sid(
1115                                 db, domsid, domain_range_index, ctx->force);
1116         return status;
1117 }
1118
1119 struct idmap_autorid_delete_domain_ranges_ctx {
1120         const char *domsid;
1121         bool force;
1122         int count; /* output: count records operated on */
1123 };
1124
1125 static NTSTATUS idmap_autorid_delete_domain_ranges_action(struct db_context *db,
1126                                                           void *private_data)
1127 {
1128         struct idmap_autorid_delete_domain_ranges_ctx *ctx;
1129         struct delete_domain_ranges_visitor_ctx visitor_ctx;
1130         int count;
1131         NTSTATUS status;
1132
1133         ctx = (struct idmap_autorid_delete_domain_ranges_ctx *)private_data;
1134
1135         ZERO_STRUCT(visitor_ctx);
1136         visitor_ctx.force = ctx->force;
1137
1138         status = idmap_autorid_iterate_domain_ranges(db,
1139                                 ctx->domsid,
1140                                 idmap_autorid_delete_domain_ranges_visitor,
1141                                 &visitor_ctx,
1142                                 &count);
1143         if (!NT_STATUS_IS_OK(status)) {
1144                 return status;
1145         }
1146
1147         ctx->count = count;
1148
1149         return NT_STATUS_OK;
1150 }
1151
1152 NTSTATUS idmap_autorid_delete_domain_ranges(struct db_context *db,
1153                                             const char *domsid,
1154                                             bool force,
1155                                             int *count)
1156 {
1157         NTSTATUS status;
1158         struct idmap_autorid_delete_domain_ranges_ctx ctx;
1159
1160         ZERO_STRUCT(ctx);
1161         ctx.domsid = domsid;
1162         ctx.force = force;
1163
1164         status = dbwrap_trans_do(db, idmap_autorid_delete_domain_ranges_action,
1165                                  &ctx);
1166         if (!NT_STATUS_IS_OK(status)) {
1167                 return status;
1168         }
1169
1170         *count = ctx.count;
1171
1172         return NT_STATUS_OK;
1173 }