1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * Database related utility routines 30 */ 31 32 #include <atomic.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <errno.h> 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <rpc/rpc.h> 40 #include <sys/sid.h> 41 #include <time.h> 42 #include <pwd.h> 43 #include <grp.h> 44 #include <pthread.h> 45 #include <assert.h> 46 #include <sys/u8_textprep.h> 47 48 #include "idmapd.h" 49 #include "adutils.h" 50 #include "string.h" 51 #include "idmap_priv.h" 52 #include "schema.h" 53 #include "nldaputils.h" 54 55 56 static int degraded = 0; /* whether the FMRI has been marked degraded */ 57 58 static idmap_retcode sql_compile_n_step_once(sqlite *, char *, 59 sqlite_vm **, int *, int, const char ***); 60 static idmap_retcode lookup_wksids_name2sid(const char *, char **, char **, 61 idmap_rid_t *, int *); 62 static idmap_retcode ad_lookup(lookup_state_t *, idmap_mapping *, 63 idmap_id_res *, int, int, int); 64 static idmap_retcode lookup_localsid2pid(idmap_mapping *, idmap_id_res *); 65 static idmap_retcode lookup_cache_name2sid(sqlite *, const char *, 66 const char *, char **, char **, idmap_rid_t *, int *); 67 68 69 #define EMPTY_NAME(name) (*name == 0 || strcmp(name, "\"\"") == 0) 70 71 #define DO_NOT_ALLOC_NEW_ID_MAPPING(req)\ 72 (req->flag & IDMAP_REQ_FLG_NO_NEW_ID_ALLOC) 73 74 #define AVOID_NAMESERVICE(req)\ 75 (req->flag & IDMAP_REQ_FLG_NO_NAMESERVICE) 76 77 #define IS_EPHEMERAL(pid) (pid > INT32_MAX && pid != SENTINEL_PID) 78 79 #define LOCALRID_MIN 1000 80 81 82 typedef enum init_db_option { 83 FAIL_IF_CORRUPT = 0, 84 REMOVE_IF_CORRUPT = 1 85 } init_db_option_t; 86 87 /* 88 * Data structure to store well-known SIDs and 89 * associated mappings (if any) 90 */ 91 typedef struct wksids_table { 92 const char *sidprefix; 93 uint32_t rid; 94 const char *winname; 95 int is_wuser; 96 uid_t pid; 97 int is_user; 98 int direction; 99 } wksids_table_t; 100 101 /* 102 * Thread specfic data to hold the database handles so that the 103 * databaes are not opened and closed for every request. It also 104 * contains the sqlite busy handler structure. 105 */ 106 107 struct idmap_busy { 108 const char *name; 109 const int *delays; 110 int delay_size; 111 int total; 112 int sec; 113 }; 114 115 116 typedef struct idmap_tsd { 117 sqlite *db_db; 118 sqlite *cache_db; 119 struct idmap_busy cache_busy; 120 struct idmap_busy db_busy; 121 } idmap_tsd_t; 122 123 124 125 static const int cache_delay_table[] = 126 { 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 127 50, 50, 60, 70, 80, 90, 100}; 128 129 static const int db_delay_table[] = 130 { 5, 10, 15, 20, 30, 40, 55, 70, 100}; 131 132 133 static pthread_key_t idmap_tsd_key; 134 135 void 136 idmap_tsd_destroy(void *key) 137 { 138 139 idmap_tsd_t *tsd = (idmap_tsd_t *)key; 140 if (tsd) { 141 if (tsd->db_db) 142 (void) sqlite_close(tsd->db_db); 143 if (tsd->cache_db) 144 (void) sqlite_close(tsd->cache_db); 145 free(tsd); 146 } 147 } 148 149 int 150 idmap_init_tsd_key(void) 151 { 152 return (pthread_key_create(&idmap_tsd_key, idmap_tsd_destroy)); 153 } 154 155 156 157 idmap_tsd_t * 158 idmap_get_tsd(void) 159 { 160 idmap_tsd_t *tsd; 161 162 if ((tsd = pthread_getspecific(idmap_tsd_key)) == NULL) { 163 /* No thread specific data so create it */ 164 if ((tsd = malloc(sizeof (*tsd))) != NULL) { 165 /* Initialize thread specific data */ 166 (void) memset(tsd, 0, sizeof (*tsd)); 167 /* save the trhread specific data */ 168 if (pthread_setspecific(idmap_tsd_key, tsd) != 0) { 169 /* Can't store key */ 170 free(tsd); 171 tsd = NULL; 172 } 173 } else { 174 tsd = NULL; 175 } 176 } 177 178 return (tsd); 179 } 180 181 static 182 const char * 183 get_fmri(void) 184 { 185 static char *fmri = NULL; 186 static char buf[60]; 187 char *s; 188 189 membar_consumer(); 190 s = fmri; 191 if (s != NULL && *s == '\0') 192 return (NULL); 193 else if (s != NULL) 194 return (s); 195 196 if ((s = getenv("SMF_FMRI")) == NULL || strlen(s) >= sizeof (buf)) 197 buf[0] = '\0'; 198 else 199 (void) strlcpy(buf, s, sizeof (buf)); 200 201 membar_producer(); 202 fmri = buf; 203 204 return (get_fmri()); 205 } 206 207 /* 208 * Wrappers for smf_degrade/restore_instance() 209 * 210 * smf_restore_instance() is too heavy duty to be calling every time we 211 * have a successful AD name<->SID lookup. 212 */ 213 void 214 degrade_svc(void) 215 { 216 const char *fmri; 217 218 if ((fmri = get_fmri()) == NULL) 219 return; 220 221 membar_consumer(); 222 if (degraded) 223 return; 224 (void) smf_degrade_instance(fmri, 0); 225 membar_producer(); 226 degraded = 1; 227 } 228 229 230 void 231 restore_svc(void) 232 { 233 const char *fmri; 234 235 if ((fmri = get_fmri()) == NULL) 236 return; 237 238 membar_consumer(); 239 if (!degraded) 240 return; 241 (void) smf_restore_instance(fmri); 242 membar_producer(); 243 degraded = 0; 244 } 245 246 /* 247 * A simple wrapper around u8_textprep_str() that returns the Unicode 248 * lower-case version of some string. The result must be freed. 249 */ 250 char * 251 tolower_u8(const char *s) 252 { 253 char *res = NULL; 254 char *outs; 255 size_t inlen, outlen, inbytesleft, outbytesleft; 256 int rc, err; 257 258 /* 259 * u8_textprep_str() does not allocate memory. The input and 260 * output buffers may differ in size (though that would be more 261 * likely when normalization is done). We have to loop over it... 262 * 263 * To improve the chances that we can avoid looping we add 10 264 * bytes of output buffer room the first go around. 265 */ 266 inlen = inbytesleft = strlen(s); 267 outlen = outbytesleft = inlen + 10; 268 if ((res = malloc(outlen)) == NULL) 269 return (NULL); 270 outs = res; 271 272 while ((rc = u8_textprep_str((char *)s, &inbytesleft, outs, 273 &outbytesleft, U8_TEXTPREP_TOLOWER, U8_UNICODE_LATEST, &err)) < 0 && 274 err == E2BIG) { 275 if ((res = realloc(res, outlen + inbytesleft)) == NULL) 276 return (NULL); 277 /* adjust input/output buffer pointers */ 278 s += (inlen - inbytesleft); 279 outs = res + outlen - outbytesleft; 280 /* adjust outbytesleft and outlen */ 281 outlen += inbytesleft; 282 outbytesleft += inbytesleft; 283 } 284 285 if (rc < 0) { 286 free(res); 287 res = NULL; 288 return (NULL); 289 } 290 291 res[outlen - outbytesleft] = '\0'; 292 293 return (res); 294 } 295 296 static int sql_exec_tran_no_cb(sqlite *db, char *sql, const char *dbname, 297 const char *while_doing); 298 299 300 /* 301 * Initialize 'dbname' using 'sql' 302 */ 303 static 304 int 305 init_db_instance(const char *dbname, int version, 306 const char *detect_version_sql, char * const *sql, 307 init_db_option_t opt, int *created, int *upgraded) 308 { 309 int rc, curr_version; 310 int tries = 1; 311 int prio = LOG_NOTICE; 312 sqlite *db = NULL; 313 char *errmsg = NULL; 314 315 *created = 0; 316 *upgraded = 0; 317 318 if (opt == REMOVE_IF_CORRUPT) 319 tries = 3; 320 321 rinse_repeat: 322 if (tries == 0) { 323 idmapdlog(LOG_ERR, "Failed to initialize db %s", dbname); 324 return (-1); 325 } 326 if (tries-- == 1) 327 /* Last try, log errors */ 328 prio = LOG_ERR; 329 330 db = sqlite_open(dbname, 0600, &errmsg); 331 if (db == NULL) { 332 idmapdlog(prio, "Error creating database %s (%s)", 333 dbname, CHECK_NULL(errmsg)); 334 sqlite_freemem(errmsg); 335 if (opt == REMOVE_IF_CORRUPT) 336 (void) unlink(dbname); 337 goto rinse_repeat; 338 } 339 340 sqlite_busy_timeout(db, 3000); 341 342 /* Detect current version of schema in the db, if any */ 343 curr_version = 0; 344 if (detect_version_sql != NULL) { 345 char *end, **results; 346 int nrow; 347 348 #ifdef IDMAPD_DEBUG 349 (void) fprintf(stderr, "Schema version detection SQL: %s\n", 350 detect_version_sql); 351 #endif /* IDMAPD_DEBUG */ 352 rc = sqlite_get_table(db, detect_version_sql, &results, 353 &nrow, NULL, &errmsg); 354 if (rc != SQLITE_OK) { 355 idmapdlog(prio, 356 "Error detecting schema version of db %s (%s)", 357 dbname, errmsg); 358 sqlite_freemem(errmsg); 359 sqlite_free_table(results); 360 sqlite_close(db); 361 return (-1); 362 } 363 if (nrow != 1) { 364 idmapdlog(prio, 365 "Error detecting schema version of db %s", dbname); 366 sqlite_close(db); 367 sqlite_free_table(results); 368 return (-1); 369 } 370 curr_version = strtol(results[1], &end, 10); 371 sqlite_free_table(results); 372 } 373 374 if (curr_version < 0) { 375 if (opt == REMOVE_IF_CORRUPT) 376 (void) unlink(dbname); 377 goto rinse_repeat; 378 } 379 380 if (curr_version == version) 381 goto done; 382 383 /* Install or upgrade schema */ 384 #ifdef IDMAPD_DEBUG 385 (void) fprintf(stderr, "Schema init/upgrade SQL: %s\n", 386 sql[curr_version]); 387 #endif /* IDMAPD_DEBUG */ 388 rc = sql_exec_tran_no_cb(db, sql[curr_version], dbname, 389 (curr_version == 0) ? "installing schema" : "upgrading schema"); 390 if (rc != 0) { 391 idmapdlog(prio, "Error %s schema for db %s", dbname, 392 (curr_version == 0) ? "installing schema" : 393 "upgrading schema"); 394 if (opt == REMOVE_IF_CORRUPT) 395 (void) unlink(dbname); 396 goto rinse_repeat; 397 } 398 399 *upgraded = (curr_version > 0); 400 *created = (curr_version == 0); 401 402 done: 403 (void) sqlite_close(db); 404 return (0); 405 } 406 407 408 /* 409 * This is the SQLite database busy handler that retries the SQL 410 * operation until it is successful. 411 */ 412 int 413 /* LINTED E_FUNC_ARG_UNUSED */ 414 idmap_sqlite_busy_handler(void *arg, const char *table_name, int count) 415 { 416 struct idmap_busy *busy = arg; 417 int delay; 418 struct timespec rqtp; 419 420 if (count == 1) { 421 busy->total = 0; 422 busy->sec = 2; 423 } 424 if (busy->total > 1000 * busy->sec) { 425 idmapdlog(LOG_ERR, 426 "Thread %d waited %d sec for the %s database", 427 pthread_self(), busy->sec, busy->name); 428 busy->sec++; 429 } 430 431 if (count <= busy->delay_size) { 432 delay = busy->delays[count-1]; 433 } else { 434 delay = busy->delays[busy->delay_size - 1]; 435 } 436 busy->total += delay; 437 rqtp.tv_sec = 0; 438 rqtp.tv_nsec = delay * (NANOSEC / MILLISEC); 439 (void) nanosleep(&rqtp, NULL); 440 return (1); 441 } 442 443 444 /* 445 * Get the database handle 446 */ 447 idmap_retcode 448 get_db_handle(sqlite **db) 449 { 450 char *errmsg; 451 idmap_tsd_t *tsd; 452 453 /* 454 * Retrieve the db handle from thread-specific storage 455 * If none exists, open and store in thread-specific storage. 456 */ 457 if ((tsd = idmap_get_tsd()) == NULL) { 458 idmapdlog(LOG_ERR, 459 "Error getting thread specific data for %s", IDMAP_DBNAME); 460 return (IDMAP_ERR_MEMORY); 461 } 462 463 if (tsd->db_db == NULL) { 464 tsd->db_db = sqlite_open(IDMAP_DBNAME, 0, &errmsg); 465 if (tsd->db_db == NULL) { 466 idmapdlog(LOG_ERR, "Error opening database %s (%s)", 467 IDMAP_DBNAME, CHECK_NULL(errmsg)); 468 sqlite_freemem(errmsg); 469 return (IDMAP_ERR_DB); 470 } 471 472 tsd->db_busy.name = IDMAP_DBNAME; 473 tsd->db_busy.delays = db_delay_table; 474 tsd->db_busy.delay_size = sizeof (db_delay_table) / 475 sizeof (int); 476 sqlite_busy_handler(tsd->db_db, idmap_sqlite_busy_handler, 477 &tsd->db_busy); 478 } 479 *db = tsd->db_db; 480 return (IDMAP_SUCCESS); 481 } 482 483 /* 484 * Get the cache handle 485 */ 486 idmap_retcode 487 get_cache_handle(sqlite **cache) 488 { 489 char *errmsg; 490 idmap_tsd_t *tsd; 491 492 /* 493 * Retrieve the db handle from thread-specific storage 494 * If none exists, open and store in thread-specific storage. 495 */ 496 if ((tsd = idmap_get_tsd()) == NULL) { 497 idmapdlog(LOG_ERR, "Error getting thread specific data for %s", 498 IDMAP_DBNAME); 499 return (IDMAP_ERR_MEMORY); 500 } 501 502 if (tsd->cache_db == NULL) { 503 tsd->cache_db = sqlite_open(IDMAP_CACHENAME, 0, &errmsg); 504 if (tsd->cache_db == NULL) { 505 idmapdlog(LOG_ERR, "Error opening database %s (%s)", 506 IDMAP_CACHENAME, CHECK_NULL(errmsg)); 507 sqlite_freemem(errmsg); 508 return (IDMAP_ERR_DB); 509 } 510 511 tsd->cache_busy.name = IDMAP_CACHENAME; 512 tsd->cache_busy.delays = cache_delay_table; 513 tsd->cache_busy.delay_size = sizeof (cache_delay_table) / 514 sizeof (int); 515 sqlite_busy_handler(tsd->cache_db, idmap_sqlite_busy_handler, 516 &tsd->cache_busy); 517 } 518 *cache = tsd->cache_db; 519 return (IDMAP_SUCCESS); 520 } 521 522 /* 523 * Initialize cache and db 524 */ 525 int 526 init_dbs() 527 { 528 char *sql[2]; 529 int created, upgraded; 530 531 /* name-based mappings; probably OK to blow away in a pinch(?) */ 532 sql[0] = DB_INSTALL_SQL; 533 sql[1] = DB_UPGRADE_FROM_v1_SQL; 534 535 if (init_db_instance(IDMAP_DBNAME, DB_VERSION, DB_VERSION_SQL, sql, 536 FAIL_IF_CORRUPT, &created, &upgraded) < 0) 537 return (-1); 538 539 /* mappings, name/SID lookup cache + ephemeral IDs; OK to blow away */ 540 sql[0] = CACHE_INSTALL_SQL; 541 sql[1] = CACHE_UPGRADE_FROM_v1_SQL; 542 if (init_db_instance(IDMAP_CACHENAME, CACHE_VERSION, CACHE_VERSION_SQL, 543 sql, REMOVE_IF_CORRUPT, &created, &upgraded) < 0) 544 return (-1); 545 546 _idmapdstate.new_eph_db = (created || upgraded) ? 1 : 0; 547 548 return (0); 549 } 550 551 /* 552 * Finalize databases 553 */ 554 void 555 fini_dbs() 556 { 557 } 558 559 /* 560 * This table is a listing of status codes that will be returned to the 561 * client when a SQL command fails with the corresponding error message. 562 */ 563 static msg_table_t sqlmsgtable[] = { 564 {IDMAP_ERR_U2W_NAMERULE_CONFLICT, 565 "columns unixname, is_user, u2w_order are not unique"}, 566 {IDMAP_ERR_W2U_NAMERULE_CONFLICT, 567 "columns winname, windomain, is_user, is_wuser, w2u_order are not" 568 " unique"}, 569 {IDMAP_ERR_W2U_NAMERULE_CONFLICT, "Conflicting w2u namerules"}, 570 {-1, NULL} 571 }; 572 573 /* 574 * idmapd's version of string2stat to map SQLite messages to 575 * status codes 576 */ 577 idmap_retcode 578 idmapd_string2stat(const char *msg) 579 { 580 int i; 581 for (i = 0; sqlmsgtable[i].msg; i++) { 582 if (strcasecmp(sqlmsgtable[i].msg, msg) == 0) 583 return (sqlmsgtable[i].retcode); 584 } 585 return (IDMAP_ERR_OTHER); 586 } 587 588 /* 589 * Executes some SQL in a transaction. 590 * 591 * Returns 0 on success, -1 if it failed but the rollback succeeded, -2 592 * if the rollback failed. 593 */ 594 static 595 int 596 sql_exec_tran_no_cb(sqlite *db, char *sql, const char *dbname, 597 const char *while_doing) 598 { 599 char *errmsg = NULL; 600 int rc; 601 602 rc = sqlite_exec(db, "BEGIN TRANSACTION;", NULL, NULL, &errmsg); 603 if (rc != SQLITE_OK) { 604 idmapdlog(LOG_ERR, "Begin transaction failed (%s) " 605 "while %s (%s)", errmsg, while_doing, dbname); 606 sqlite_freemem(errmsg); 607 return (-1); 608 } 609 610 rc = sqlite_exec(db, sql, NULL, NULL, &errmsg); 611 if (rc != SQLITE_OK) { 612 idmapdlog(LOG_ERR, "Database error (%s) while %s (%s)", errmsg, 613 while_doing, dbname); 614 sqlite_freemem(errmsg); 615 errmsg = NULL; 616 goto rollback; 617 } 618 619 rc = sqlite_exec(db, "COMMIT TRANSACTION", NULL, NULL, &errmsg); 620 if (rc == SQLITE_OK) { 621 sqlite_freemem(errmsg); 622 return (0); 623 } 624 625 idmapdlog(LOG_ERR, "Database commit error (%s) while s (%s)", 626 errmsg, while_doing, dbname); 627 sqlite_freemem(errmsg); 628 errmsg = NULL; 629 630 rollback: 631 rc = sqlite_exec(db, "ROLLBACK TRANSACTION", NULL, NULL, &errmsg); 632 if (rc != SQLITE_OK) { 633 idmapdlog(LOG_ERR, "Rollback failed (%s) while %s (%s)", 634 errmsg, while_doing, dbname); 635 sqlite_freemem(errmsg); 636 return (-2); 637 } 638 sqlite_freemem(errmsg); 639 640 return (-1); 641 } 642 643 /* 644 * Execute the given SQL statment without using any callbacks 645 */ 646 idmap_retcode 647 sql_exec_no_cb(sqlite *db, char *sql) 648 { 649 char *errmsg = NULL; 650 int r; 651 idmap_retcode retcode; 652 653 r = sqlite_exec(db, sql, NULL, NULL, &errmsg); 654 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 655 656 if (r != SQLITE_OK) { 657 idmapdlog(LOG_ERR, "Database error during %s (%s)", sql, 658 CHECK_NULL(errmsg)); 659 retcode = idmapd_string2stat(errmsg); 660 if (errmsg != NULL) 661 sqlite_freemem(errmsg); 662 return (retcode); 663 } 664 665 return (IDMAP_SUCCESS); 666 } 667 668 /* 669 * Generate expression that can be used in WHERE statements. 670 * Examples: 671 * <prefix> <col> <op> <value> <suffix> 672 * "" "unixuser" "=" "foo" "AND" 673 */ 674 idmap_retcode 675 gen_sql_expr_from_rule(idmap_namerule *rule, char **out) 676 { 677 char *s_windomain = NULL, *s_winname = NULL; 678 char *s_unixname = NULL; 679 char *lower_winname; 680 int retcode = IDMAP_SUCCESS; 681 682 if (out == NULL) 683 return (IDMAP_ERR_ARG); 684 685 686 if (!EMPTY_STRING(rule->windomain)) { 687 s_windomain = sqlite_mprintf("AND windomain = %Q ", 688 rule->windomain); 689 if (s_windomain == NULL) { 690 retcode = IDMAP_ERR_MEMORY; 691 goto out; 692 } 693 } 694 695 if (!EMPTY_STRING(rule->winname)) { 696 if ((lower_winname = tolower_u8(rule->winname)) == NULL) 697 lower_winname = rule->winname; 698 s_winname = sqlite_mprintf( 699 "AND winname = %Q AND is_wuser = %d ", 700 lower_winname, rule->is_wuser ? 1 : 0); 701 if (lower_winname != rule->winname) 702 free(lower_winname); 703 if (s_winname == NULL) { 704 retcode = IDMAP_ERR_MEMORY; 705 goto out; 706 } 707 } 708 709 if (!EMPTY_STRING(rule->unixname)) { 710 s_unixname = sqlite_mprintf( 711 "AND unixname = %Q AND is_user = %d ", 712 rule->unixname, rule->is_user ? 1 : 0); 713 if (s_unixname == NULL) { 714 retcode = IDMAP_ERR_MEMORY; 715 goto out; 716 } 717 } 718 719 *out = sqlite_mprintf("%s %s %s", 720 s_windomain ? s_windomain : "", 721 s_winname ? s_winname : "", 722 s_unixname ? s_unixname : ""); 723 724 if (*out == NULL) { 725 retcode = IDMAP_ERR_MEMORY; 726 idmapdlog(LOG_ERR, "Out of memory"); 727 goto out; 728 } 729 730 out: 731 if (s_windomain != NULL) 732 sqlite_freemem(s_windomain); 733 if (s_winname != NULL) 734 sqlite_freemem(s_winname); 735 if (s_unixname != NULL) 736 sqlite_freemem(s_unixname); 737 738 return (retcode); 739 } 740 741 742 743 /* 744 * Generate and execute SQL statement for LIST RPC calls 745 */ 746 idmap_retcode 747 process_list_svc_sql(sqlite *db, char *sql, uint64_t limit, 748 list_svc_cb cb, void *result) 749 { 750 list_cb_data_t cb_data; 751 char *errmsg = NULL; 752 int r; 753 idmap_retcode retcode = IDMAP_ERR_INTERNAL; 754 755 (void) memset(&cb_data, 0, sizeof (cb_data)); 756 cb_data.result = result; 757 cb_data.limit = limit; 758 759 760 r = sqlite_exec(db, sql, cb, &cb_data, &errmsg); 761 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 762 switch (r) { 763 case SQLITE_OK: 764 retcode = IDMAP_SUCCESS; 765 break; 766 767 default: 768 retcode = IDMAP_ERR_INTERNAL; 769 idmapdlog(LOG_ERR, "Database error during %s (%s)", sql, 770 CHECK_NULL(errmsg)); 771 break; 772 } 773 if (errmsg != NULL) 774 sqlite_freemem(errmsg); 775 return (retcode); 776 } 777 778 /* 779 * This routine is called by callbacks that process the results of 780 * LIST RPC calls to validate data and to allocate memory for 781 * the result array. 782 */ 783 idmap_retcode 784 validate_list_cb_data(list_cb_data_t *cb_data, int argc, char **argv, 785 int ncol, uchar_t **list, size_t valsize) 786 { 787 size_t nsize; 788 void *tmplist; 789 790 if (cb_data->limit > 0 && cb_data->next == cb_data->limit) 791 return (IDMAP_NEXT); 792 793 if (argc < ncol || argv == NULL) { 794 idmapdlog(LOG_ERR, "Invalid data"); 795 return (IDMAP_ERR_INTERNAL); 796 } 797 798 /* alloc in bulk to reduce number of reallocs */ 799 if (cb_data->next >= cb_data->len) { 800 nsize = (cb_data->len + SIZE_INCR) * valsize; 801 tmplist = realloc(*list, nsize); 802 if (tmplist == NULL) { 803 idmapdlog(LOG_ERR, "Out of memory"); 804 return (IDMAP_ERR_MEMORY); 805 } 806 *list = tmplist; 807 (void) memset(*list + (cb_data->len * valsize), 0, 808 SIZE_INCR * valsize); 809 cb_data->len += SIZE_INCR; 810 } 811 return (IDMAP_SUCCESS); 812 } 813 814 static 815 idmap_retcode 816 get_namerule_order(char *winname, char *windomain, char *unixname, 817 int direction, int is_diagonal, int *w2u_order, int *u2w_order) 818 { 819 *w2u_order = 0; 820 *u2w_order = 0; 821 822 /* 823 * Windows to UNIX lookup order: 824 * 1. winname@domain (or winname) to "" 825 * 2. winname@domain (or winname) to unixname 826 * 3. winname@* to "" 827 * 4. winname@* to unixname 828 * 5. *@domain (or *) to * 829 * 6. *@domain (or *) to "" 830 * 7. *@domain (or *) to unixname 831 * 8. *@* to * 832 * 9. *@* to "" 833 * 10. *@* to unixname 834 * 835 * winname is a special case of winname@domain when domain is the 836 * default domain. Similarly * is a special case of *@domain when 837 * domain is the default domain. 838 * 839 * Note that "" has priority over specific names because "" inhibits 840 * mappings and traditionally deny rules always had higher priority. 841 */ 842 if (direction != IDMAP_DIRECTION_U2W) { 843 /* bi-directional or from windows to unix */ 844 if (winname == NULL) 845 return (IDMAP_ERR_W2U_NAMERULE); 846 else if (unixname == NULL) 847 return (IDMAP_ERR_W2U_NAMERULE); 848 else if (EMPTY_NAME(winname)) 849 return (IDMAP_ERR_W2U_NAMERULE); 850 else if (*winname == '*' && windomain && *windomain == '*') { 851 if (*unixname == '*') 852 *w2u_order = 8; 853 else if (EMPTY_NAME(unixname)) 854 *w2u_order = 9; 855 else /* unixname == name */ 856 *w2u_order = 10; 857 } else if (*winname == '*') { 858 if (*unixname == '*') 859 *w2u_order = 5; 860 else if (EMPTY_NAME(unixname)) 861 *w2u_order = 6; 862 else /* name */ 863 *w2u_order = 7; 864 } else if (windomain != NULL && *windomain == '*') { 865 /* winname == name */ 866 if (*unixname == '*') 867 return (IDMAP_ERR_W2U_NAMERULE); 868 else if (EMPTY_NAME(unixname)) 869 *w2u_order = 3; 870 else /* name */ 871 *w2u_order = 4; 872 } else { 873 /* winname == name && windomain == null or name */ 874 if (*unixname == '*') 875 return (IDMAP_ERR_W2U_NAMERULE); 876 else if (EMPTY_NAME(unixname)) 877 *w2u_order = 1; 878 else /* name */ 879 *w2u_order = 2; 880 } 881 882 } 883 884 /* 885 * 1. unixname to "", non-diagonal 886 * 2. unixname to winname@domain (or winname), non-diagonal 887 * 3. unixname to "", diagonal 888 * 4. unixname to winname@domain (or winname), diagonal 889 * 5. * to *@domain (or *), non-diagonal 890 * 5. * to *@domain (or *), diagonal 891 * 7. * to "" 892 * 8. * to winname@domain (or winname) 893 * 9. * to "", non-diagonal 894 * 10. * to winname@domain (or winname), diagonal 895 */ 896 if (direction != IDMAP_DIRECTION_W2U) { 897 int diagonal = is_diagonal ? 1 : 0; 898 899 /* bi-directional or from unix to windows */ 900 if (unixname == NULL || EMPTY_NAME(unixname)) 901 return (IDMAP_ERR_U2W_NAMERULE); 902 else if (winname == NULL) 903 return (IDMAP_ERR_U2W_NAMERULE); 904 else if (windomain != NULL && *windomain == '*') 905 return (IDMAP_ERR_U2W_NAMERULE); 906 else if (*unixname == '*') { 907 if (*winname == '*') 908 *u2w_order = 5 + diagonal; 909 else if (EMPTY_NAME(winname)) 910 *u2w_order = 7 + 2 * diagonal; 911 else 912 *u2w_order = 8 + 2 * diagonal; 913 } else { 914 if (*winname == '*') 915 return (IDMAP_ERR_U2W_NAMERULE); 916 else if (EMPTY_NAME(winname)) 917 *u2w_order = 1 + 2 * diagonal; 918 else 919 *u2w_order = 2 + 2 * diagonal; 920 } 921 } 922 return (IDMAP_SUCCESS); 923 } 924 925 /* 926 * Generate and execute SQL statement to add name-based mapping rule 927 */ 928 idmap_retcode 929 add_namerule(sqlite *db, idmap_namerule *rule) 930 { 931 char *sql = NULL; 932 idmap_stat retcode; 933 char *dom = NULL; 934 int w2u_order, u2w_order; 935 char w2ubuf[11], u2wbuf[11]; 936 937 retcode = get_namerule_order(rule->winname, rule->windomain, 938 rule->unixname, rule->direction, 939 rule->is_user == rule->is_wuser ? 0 : 1, &w2u_order, &u2w_order); 940 if (retcode != IDMAP_SUCCESS) 941 goto out; 942 943 if (w2u_order) 944 (void) snprintf(w2ubuf, sizeof (w2ubuf), "%d", w2u_order); 945 if (u2w_order) 946 (void) snprintf(u2wbuf, sizeof (u2wbuf), "%d", u2w_order); 947 948 /* 949 * For the triggers on namerules table to work correctly: 950 * 1) Use NULL instead of 0 for w2u_order and u2w_order 951 * 2) Use "" instead of NULL for "no domain" 952 */ 953 954 if (!EMPTY_STRING(rule->windomain)) 955 dom = rule->windomain; 956 else if (lookup_wksids_name2sid(rule->winname, NULL, NULL, NULL, NULL) 957 == IDMAP_SUCCESS) { 958 /* well-known SIDs don't need domain */ 959 dom = ""; 960 } 961 962 RDLOCK_CONFIG(); 963 if (dom == NULL) { 964 if (_idmapdstate.cfg->pgcfg.default_domain) 965 dom = _idmapdstate.cfg->pgcfg.default_domain; 966 else 967 dom = ""; 968 } 969 sql = sqlite_mprintf("INSERT into namerules " 970 "(is_user, is_wuser, windomain, winname_display, is_nt4, " 971 "unixname, w2u_order, u2w_order) " 972 "VALUES(%d, %d, %Q, %Q, %d, %Q, %q, %q);", 973 rule->is_user ? 1 : 0, rule->is_wuser ? 1 : 0, dom, 974 rule->winname, rule->is_nt4 ? 1 : 0, rule->unixname, 975 w2u_order ? w2ubuf : NULL, u2w_order ? u2wbuf : NULL); 976 UNLOCK_CONFIG(); 977 978 if (sql == NULL) { 979 retcode = IDMAP_ERR_INTERNAL; 980 idmapdlog(LOG_ERR, "Out of memory"); 981 goto out; 982 } 983 984 retcode = sql_exec_no_cb(db, sql); 985 986 if (retcode == IDMAP_ERR_OTHER) 987 retcode = IDMAP_ERR_CFG; 988 989 out: 990 if (sql != NULL) 991 sqlite_freemem(sql); 992 return (retcode); 993 } 994 995 /* 996 * Flush name-based mapping rules 997 */ 998 idmap_retcode 999 flush_namerules(sqlite *db) 1000 { 1001 idmap_stat retcode; 1002 1003 retcode = sql_exec_no_cb(db, "DELETE FROM namerules;"); 1004 1005 return (retcode); 1006 } 1007 1008 /* 1009 * Generate and execute SQL statement to remove a name-based mapping rule 1010 */ 1011 idmap_retcode 1012 rm_namerule(sqlite *db, idmap_namerule *rule) 1013 { 1014 char *sql = NULL; 1015 idmap_stat retcode; 1016 char buf[80]; 1017 char *expr = NULL; 1018 1019 if (rule->direction < 0 && EMPTY_STRING(rule->windomain) && 1020 EMPTY_STRING(rule->winname) && EMPTY_STRING(rule->unixname)) 1021 return (IDMAP_SUCCESS); 1022 1023 buf[0] = 0; 1024 1025 if (rule->direction == IDMAP_DIRECTION_BI) 1026 (void) snprintf(buf, sizeof (buf), "AND w2u_order > 0" 1027 " AND u2w_order > 0"); 1028 else if (rule->direction == IDMAP_DIRECTION_W2U) 1029 (void) snprintf(buf, sizeof (buf), "AND w2u_order > 0" 1030 " AND (u2w_order = 0 OR u2w_order ISNULL)"); 1031 else if (rule->direction == IDMAP_DIRECTION_U2W) 1032 (void) snprintf(buf, sizeof (buf), "AND u2w_order > 0" 1033 " AND (w2u_order = 0 OR w2u_order ISNULL)"); 1034 1035 retcode = gen_sql_expr_from_rule(rule, &expr); 1036 if (retcode != IDMAP_SUCCESS) 1037 goto out; 1038 1039 sql = sqlite_mprintf("DELETE FROM namerules WHERE 1 %s %s;", expr, 1040 buf); 1041 1042 if (sql == NULL) { 1043 retcode = IDMAP_ERR_INTERNAL; 1044 idmapdlog(LOG_ERR, "Out of memory"); 1045 goto out; 1046 } 1047 1048 1049 retcode = sql_exec_no_cb(db, sql); 1050 1051 out: 1052 if (expr != NULL) 1053 sqlite_freemem(expr); 1054 if (sql != NULL) 1055 sqlite_freemem(sql); 1056 return (retcode); 1057 } 1058 1059 /* 1060 * Compile the given SQL query and step just once. 1061 * 1062 * Input: 1063 * db - db handle 1064 * sql - SQL statement 1065 * 1066 * Output: 1067 * vm - virtual SQL machine 1068 * ncol - number of columns in the result 1069 * values - column values 1070 * 1071 * Return values: 1072 * IDMAP_SUCCESS 1073 * IDMAP_ERR_NOTFOUND 1074 * IDMAP_ERR_INTERNAL 1075 */ 1076 1077 static 1078 idmap_retcode 1079 sql_compile_n_step_once(sqlite *db, char *sql, sqlite_vm **vm, int *ncol, 1080 int reqcol, const char ***values) 1081 { 1082 char *errmsg = NULL; 1083 int r; 1084 1085 if ((r = sqlite_compile(db, sql, NULL, vm, &errmsg)) != SQLITE_OK) { 1086 idmapdlog(LOG_ERR, "Database error during %s (%s)", sql, 1087 CHECK_NULL(errmsg)); 1088 sqlite_freemem(errmsg); 1089 return (IDMAP_ERR_INTERNAL); 1090 } 1091 1092 r = sqlite_step(*vm, ncol, values, NULL); 1093 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 1094 1095 if (r == SQLITE_ROW) { 1096 if (ncol != NULL && *ncol < reqcol) { 1097 (void) sqlite_finalize(*vm, NULL); 1098 *vm = NULL; 1099 return (IDMAP_ERR_INTERNAL); 1100 } 1101 /* Caller will call finalize after using the results */ 1102 return (IDMAP_SUCCESS); 1103 } else if (r == SQLITE_DONE) { 1104 (void) sqlite_finalize(*vm, NULL); 1105 *vm = NULL; 1106 return (IDMAP_ERR_NOTFOUND); 1107 } 1108 1109 (void) sqlite_finalize(*vm, &errmsg); 1110 *vm = NULL; 1111 idmapdlog(LOG_ERR, "Database error during %s (%s)", sql, 1112 CHECK_NULL(errmsg)); 1113 sqlite_freemem(errmsg); 1114 return (IDMAP_ERR_INTERNAL); 1115 } 1116 1117 /* 1118 * Update nm_siduid and nm_sidgid fields in the lookup state. 1119 * 1120 * state->nm_siduid represents mode used by sid2uid and uid2sid 1121 * requests for directory-based name mappings. Similarly, 1122 * state->nm_sidgid represents mode used by sid2gid and gid2sid 1123 * requests. 1124 * 1125 * sid2uid/uid2sid: 1126 * none -> ds_name_mapping_enabled != true 1127 * AD-mode -> !nldap_winname_attr && ad_unixuser_attr 1128 * nldap-mode -> nldap_winname_attr && !ad_unixuser_attr 1129 * mixed-mode -> nldap_winname_attr && ad_unixuser_attr 1130 * 1131 * sid2gid/gid2sid: 1132 * none -> ds_name_mapping_enabled != true 1133 * AD-mode -> !nldap_winname_attr && ad_unixgroup_attr 1134 * nldap-mode -> nldap_winname_attr && !ad_unixgroup_attr 1135 * mixed-mode -> nldap_winname_attr && ad_unixgroup_attr 1136 */ 1137 idmap_retcode 1138 get_ds_namemap_type(lookup_state_t *state) 1139 { 1140 state->nm_siduid = IDMAP_NM_NONE; 1141 state->nm_sidgid = IDMAP_NM_NONE; 1142 RDLOCK_CONFIG(); 1143 if (_idmapdstate.cfg->pgcfg.ds_name_mapping_enabled == FALSE) { 1144 UNLOCK_CONFIG(); 1145 return (IDMAP_SUCCESS); 1146 } 1147 if (_idmapdstate.cfg->pgcfg.nldap_winname_attr != NULL) { 1148 state->nm_siduid = 1149 (_idmapdstate.cfg->pgcfg.ad_unixuser_attr != NULL) 1150 ? IDMAP_NM_MIXED : IDMAP_NM_NLDAP; 1151 state->nm_sidgid = 1152 (_idmapdstate.cfg->pgcfg.ad_unixgroup_attr != NULL) 1153 ? IDMAP_NM_MIXED : IDMAP_NM_NLDAP; 1154 } else { 1155 state->nm_siduid = 1156 (_idmapdstate.cfg->pgcfg.ad_unixuser_attr != NULL) 1157 ? IDMAP_NM_AD : IDMAP_NM_NONE; 1158 state->nm_sidgid = 1159 (_idmapdstate.cfg->pgcfg.ad_unixgroup_attr != NULL) 1160 ? IDMAP_NM_AD : IDMAP_NM_NONE; 1161 } 1162 if (_idmapdstate.cfg->pgcfg.ad_unixuser_attr != NULL) { 1163 state->ad_unixuser_attr = 1164 strdup(_idmapdstate.cfg->pgcfg.ad_unixuser_attr); 1165 if (state->ad_unixuser_attr == NULL) { 1166 UNLOCK_CONFIG(); 1167 return (IDMAP_ERR_MEMORY); 1168 } 1169 } 1170 if (_idmapdstate.cfg->pgcfg.ad_unixgroup_attr != NULL) { 1171 state->ad_unixgroup_attr = 1172 strdup(_idmapdstate.cfg->pgcfg.ad_unixgroup_attr); 1173 if (state->ad_unixgroup_attr == NULL) { 1174 UNLOCK_CONFIG(); 1175 return (IDMAP_ERR_MEMORY); 1176 } 1177 } 1178 UNLOCK_CONFIG(); 1179 return (IDMAP_SUCCESS); 1180 } 1181 1182 /* 1183 * Table for well-known SIDs. 1184 * 1185 * Background: 1186 * 1187 * Some of the well-known principals are stored under: 1188 * cn=WellKnown Security Principals, cn=Configuration, dc=<forestRootDomain> 1189 * They belong to objectClass "foreignSecurityPrincipal". They don't have 1190 * "samAccountName" nor "userPrincipalName" attributes. Their names are 1191 * available in "cn" and "name" attributes. Some of these principals have a 1192 * second entry under CN=ForeignSecurityPrincipals,dc=<forestRootDomain> and 1193 * these duplicate entries have the stringified SID in the "name" and "cn" 1194 * attributes instead of the actual name. 1195 * 1196 * Those of the form S-1-5-32-X are Builtin groups and are stored in the 1197 * cn=builtin container (except, Power Users which is not stored in AD) 1198 * 1199 * These principals are and will remain constant. Therefore doing AD lookups 1200 * provides no benefit. Also, using hard-coded table (and thus avoiding AD 1201 * lookup) improves performance and avoids additional complexity in the 1202 * adutils.c code. Moreover these SIDs can be used when no Active Directory 1203 * is available (such as the CIFS server's "workgroup" mode). 1204 * 1205 * Notes: 1206 * 1. Currently we don't support localization of well-known SID names, 1207 * unlike Windows. 1208 * 1209 * 2. Other well-known SIDs i.e. S-1-5-<domain>-<w-k RID> are not stored 1210 * here. AD does have normal user/group objects for these objects and 1211 * can be looked up using the existing AD lookup code. 1212 * 1213 * 3. See comments above lookup_wksids_sid2pid() for more information 1214 * on how we lookup the wksids table. 1215 */ 1216 static wksids_table_t wksids[] = { 1217 {"S-1-0", 0, "Nobody", 0, SENTINEL_PID, -1, 1}, 1218 {"S-1-1", 0, "Everyone", 0, SENTINEL_PID, -1, -1}, 1219 {"S-1-3", 0, "Creator Owner", 1, IDMAP_WK_CREATOR_OWNER_UID, 1, 0}, 1220 {"S-1-3", 1, "Creator Group", 0, IDMAP_WK_CREATOR_GROUP_GID, 0, 0}, 1221 {"S-1-3", 2, "Creator Owner Server", 1, SENTINEL_PID, -1, -1}, 1222 {"S-1-3", 3, "Creator Group Server", 0, SENTINEL_PID, -1, 1}, 1223 {"S-1-3", 4, "Owner Rights", 0, SENTINEL_PID, -1, -1}, 1224 {"S-1-5", 1, "Dialup", 0, SENTINEL_PID, -1, -1}, 1225 {"S-1-5", 2, "Network", 0, SENTINEL_PID, -1, -1}, 1226 {"S-1-5", 3, "Batch", 0, SENTINEL_PID, -1, -1}, 1227 {"S-1-5", 4, "Interactive", 0, SENTINEL_PID, -1, -1}, 1228 {"S-1-5", 6, "Service", 0, SENTINEL_PID, -1, -1}, 1229 {"S-1-5", 7, "Anonymous Logon", 0, GID_NOBODY, 0, 0}, 1230 {"S-1-5", 7, "Anonymous Logon", 0, UID_NOBODY, 1, 0}, 1231 {"S-1-5", 8, "Proxy", 0, SENTINEL_PID, -1, -1}, 1232 {"S-1-5", 9, "Enterprise Domain Controllers", 0, SENTINEL_PID, -1, -1}, 1233 {"S-1-5", 10, "Self", 0, SENTINEL_PID, -1, -1}, 1234 {"S-1-5", 11, "Authenticated Users", 0, SENTINEL_PID, -1, -1}, 1235 {"S-1-5", 12, "Restricted Code", 0, SENTINEL_PID, -1, -1}, 1236 {"S-1-5", 13, "Terminal Server User", 0, SENTINEL_PID, -1, -1}, 1237 {"S-1-5", 14, "Remote Interactive Logon", 0, SENTINEL_PID, -1, -1}, 1238 {"S-1-5", 15, "This Organization", 0, SENTINEL_PID, -1, -1}, 1239 {"S-1-5", 17, "IUSR", 0, SENTINEL_PID, -1, -1}, 1240 {"S-1-5", 18, "Local System", 0, IDMAP_WK_LOCAL_SYSTEM_GID, 0, 0}, 1241 {"S-1-5", 19, "Local Service", 0, SENTINEL_PID, -1, -1}, 1242 {"S-1-5", 20, "Network Service", 0, SENTINEL_PID, -1, -1}, 1243 {"S-1-5", 1000, "Other Organization", 0, SENTINEL_PID, -1, -1}, 1244 {"S-1-5-32", 544, "Administrators", 0, SENTINEL_PID, -1, -1}, 1245 {"S-1-5-32", 545, "Users", 0, SENTINEL_PID, -1, -1}, 1246 {"S-1-5-32", 546, "Guests", 0, SENTINEL_PID, -1, -1}, 1247 {"S-1-5-32", 547, "Power Users", 0, SENTINEL_PID, -1, -1}, 1248 {"S-1-5-32", 548, "Account Operators", 0, SENTINEL_PID, -1, -1}, 1249 {"S-1-5-32", 549, "Server Operators", 0, SENTINEL_PID, -1, -1}, 1250 {"S-1-5-32", 550, "Print Operators", 0, SENTINEL_PID, -1, -1}, 1251 {"S-1-5-32", 551, "Backup Operators", 0, SENTINEL_PID, -1, -1}, 1252 {"S-1-5-32", 552, "Replicator", 0, SENTINEL_PID, -1, -1}, 1253 {"S-1-5-32", 554, "Pre-Windows 2000 Compatible Access", 0, 1254 SENTINEL_PID, -1, -1}, 1255 {"S-1-5-32", 555, "Remote Desktop Users", 0, SENTINEL_PID, -1, -1}, 1256 {"S-1-5-32", 556, "Network Configuration Operators", 0, 1257 SENTINEL_PID, -1, -1}, 1258 {"S-1-5-32", 557, "Incoming Forest Trust Builders", 0, 1259 SENTINEL_PID, -1, -1}, 1260 {"S-1-5-32", 558, "Performance Monitor Users", 0, SENTINEL_PID, -1, -1}, 1261 {"S-1-5-32", 559, "Performance Log Users", 0, SENTINEL_PID, -1, -1}, 1262 {"S-1-5-32", 560, "Windows Authorization Access Group", 0, 1263 SENTINEL_PID, -1, -1}, 1264 {"S-1-5-32", 561, "Terminal Server License Servers", 0, 1265 SENTINEL_PID, -1, -1}, 1266 {"S-1-5-32", 561, "Distributed COM Users", 0, SENTINEL_PID, -1, -1}, 1267 {"S-1-5-32", 568, "IIS_IUSRS", 0, SENTINEL_PID, -1, -1}, 1268 {"S-1-5-32", 569, "Cryptographic Operators", 0, SENTINEL_PID, -1, -1}, 1269 {"S-1-5-32", 573, "Event Log Readers", 0, SENTINEL_PID, -1, -1}, 1270 {"S-1-5-32", 574, "Certificate Service DCOM Access", 0, 1271 SENTINEL_PID, -1, -1}, 1272 {"S-1-5-64", 21, "Digest Authentication", 0, SENTINEL_PID, -1, -1}, 1273 {"S-1-5-64", 10, "NTLM Authentication", 0, SENTINEL_PID, -1, -1}, 1274 {"S-1-5-64", 14, "SChannel Authentication", 0, SENTINEL_PID, -1, -1}, 1275 {NULL, UINT32_MAX, NULL, -1, SENTINEL_PID, -1, -1} 1276 }; 1277 1278 /* 1279 * Lookup well-known SIDs table either by winname or by SID. 1280 * If the given winname or SID is a well-known SID then we set wksid 1281 * variable and then proceed to see if the SID has a hard mapping to 1282 * a particular UID/GID (Ex: Creator Owner/Creator Group mapped to 1283 * fixed ephemeral ids). If we find such mapping then we return 1284 * success otherwise notfound. If a well-known SID is mapped to 1285 * SENTINEL_PID and the direction field is set (bi-directional or 1286 * win2unix) then we treat it as inhibited mapping and return no 1287 * mapping (Ex. S-1-0-0). 1288 */ 1289 static 1290 idmap_retcode 1291 lookup_wksids_sid2pid(idmap_mapping *req, idmap_id_res *res, int *wksid) 1292 { 1293 int i; 1294 1295 *wksid = 0; 1296 1297 for (i = 0; wksids[i].sidprefix != NULL; i++) { 1298 if (req->id1.idmap_id_u.sid.prefix != NULL) { 1299 if ((strcasecmp(wksids[i].sidprefix, 1300 req->id1.idmap_id_u.sid.prefix) != 0) || 1301 wksids[i].rid != req->id1.idmap_id_u.sid.rid) 1302 /* this is not our SID */ 1303 continue; 1304 if (req->id1name == NULL) { 1305 req->id1name = strdup(wksids[i].winname); 1306 if (req->id1name == NULL) 1307 return (IDMAP_ERR_MEMORY); 1308 } 1309 } else if (req->id1name != NULL) { 1310 if (strcasecmp(wksids[i].winname, req->id1name) != 0) 1311 /* this is not our winname */ 1312 continue; 1313 req->id1.idmap_id_u.sid.prefix = 1314 strdup(wksids[i].sidprefix); 1315 if (req->id1.idmap_id_u.sid.prefix == NULL) 1316 return (IDMAP_ERR_MEMORY); 1317 req->id1.idmap_id_u.sid.rid = wksids[i].rid; 1318 } 1319 1320 *wksid = 1; 1321 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 1322 1323 req->id1.idtype = (wksids[i].is_wuser) ? 1324 IDMAP_USID : IDMAP_GSID; 1325 1326 if (wksids[i].pid == SENTINEL_PID) { 1327 if (wksids[i].direction == IDMAP_DIRECTION_BI || 1328 wksids[i].direction == IDMAP_DIRECTION_W2U) 1329 /* Inhibited */ 1330 return (IDMAP_ERR_NOMAPPING); 1331 /* Not mapped */ 1332 return (IDMAP_ERR_NOTFOUND); 1333 } else if (wksids[i].direction == IDMAP_DIRECTION_U2W) 1334 continue; 1335 1336 switch (res->id.idtype) { 1337 case IDMAP_UID: 1338 if (wksids[i].is_user == 0) 1339 continue; 1340 res->id.idmap_id_u.uid = wksids[i].pid; 1341 res->direction = wksids[i].direction; 1342 return (IDMAP_SUCCESS); 1343 case IDMAP_GID: 1344 if (wksids[i].is_user == 1) 1345 continue; 1346 res->id.idmap_id_u.gid = wksids[i].pid; 1347 res->direction = wksids[i].direction; 1348 return (IDMAP_SUCCESS); 1349 case IDMAP_POSIXID: 1350 res->id.idmap_id_u.uid = wksids[i].pid; 1351 res->id.idtype = (!wksids[i].is_user) ? 1352 IDMAP_GID : IDMAP_UID; 1353 res->direction = wksids[i].direction; 1354 return (IDMAP_SUCCESS); 1355 default: 1356 return (IDMAP_ERR_NOTSUPPORTED); 1357 } 1358 } 1359 return (IDMAP_ERR_NOTFOUND); 1360 } 1361 1362 1363 static 1364 idmap_retcode 1365 lookup_wksids_pid2sid(idmap_mapping *req, idmap_id_res *res, int is_user) 1366 { 1367 int i; 1368 if (req->id1.idmap_id_u.uid == SENTINEL_PID) 1369 return (IDMAP_ERR_NOTFOUND); 1370 for (i = 0; wksids[i].sidprefix != NULL; i++) { 1371 if (wksids[i].pid == req->id1.idmap_id_u.uid && 1372 wksids[i].is_user == is_user && 1373 wksids[i].direction != IDMAP_DIRECTION_W2U) { 1374 if (res->id.idtype == IDMAP_SID) { 1375 res->id.idtype = (wksids[i].is_wuser) ? 1376 IDMAP_USID : IDMAP_GSID; 1377 } 1378 res->id.idmap_id_u.sid.rid = wksids[i].rid; 1379 res->id.idmap_id_u.sid.prefix = 1380 strdup(wksids[i].sidprefix); 1381 if (res->id.idmap_id_u.sid.prefix == NULL) { 1382 idmapdlog(LOG_ERR, "Out of memory"); 1383 return (IDMAP_ERR_MEMORY); 1384 } 1385 res->direction = wksids[i].direction; 1386 return (IDMAP_SUCCESS); 1387 } 1388 } 1389 return (IDMAP_ERR_NOTFOUND); 1390 } 1391 1392 static 1393 idmap_retcode 1394 lookup_wksids_name2sid(const char *name, char **canonname, char **sidprefix, 1395 idmap_rid_t *rid, int *type) 1396 { 1397 int i; 1398 for (i = 0; wksids[i].sidprefix != NULL; i++) { 1399 if (strcasecmp(wksids[i].winname, name) != 0) 1400 continue; 1401 if (sidprefix != NULL && 1402 (*sidprefix = strdup(wksids[i].sidprefix)) == NULL) { 1403 idmapdlog(LOG_ERR, "Out of memory"); 1404 return (IDMAP_ERR_MEMORY); 1405 } 1406 if (canonname != NULL && 1407 (*canonname = strdup(wksids[i].winname)) == NULL) { 1408 idmapdlog(LOG_ERR, "Out of memory"); 1409 if (sidprefix != NULL) { 1410 free(*sidprefix); 1411 *sidprefix = NULL; 1412 } 1413 return (IDMAP_ERR_MEMORY); 1414 } 1415 if (type != NULL) 1416 *type = (wksids[i].is_wuser) ? 1417 _IDMAP_T_USER : _IDMAP_T_GROUP; 1418 if (rid != NULL) 1419 *rid = wksids[i].rid; 1420 return (IDMAP_SUCCESS); 1421 } 1422 return (IDMAP_ERR_NOTFOUND); 1423 } 1424 1425 static 1426 idmap_retcode 1427 lookup_cache_sid2pid(sqlite *cache, idmap_mapping *req, idmap_id_res *res) 1428 { 1429 char *end; 1430 char *sql = NULL; 1431 const char **values; 1432 sqlite_vm *vm = NULL; 1433 int ncol, is_user; 1434 uid_t pid; 1435 time_t curtime, exp; 1436 idmap_retcode retcode; 1437 char *is_user_string; 1438 1439 /* Current time */ 1440 errno = 0; 1441 if ((curtime = time(NULL)) == (time_t)-1) { 1442 idmapdlog(LOG_ERR, "Failed to get current time (%s)", 1443 strerror(errno)); 1444 retcode = IDMAP_ERR_INTERNAL; 1445 goto out; 1446 } 1447 1448 switch (res->id.idtype) { 1449 case IDMAP_UID: 1450 is_user_string = "1"; 1451 break; 1452 case IDMAP_GID: 1453 is_user_string = "0"; 1454 break; 1455 case IDMAP_POSIXID: 1456 /* the non-diagonal mapping */ 1457 is_user_string = "is_wuser"; 1458 break; 1459 default: 1460 retcode = IDMAP_ERR_NOTSUPPORTED; 1461 goto out; 1462 } 1463 1464 /* SQL to lookup the cache */ 1465 if (req->id1.idmap_id_u.sid.prefix != NULL) { 1466 sql = sqlite_mprintf("SELECT pid, is_user, expiration, " 1467 "unixname, u2w, is_wuser " 1468 "FROM idmap_cache WHERE is_user = %s AND " 1469 "sidprefix = %Q AND rid = %u AND w2u = 1 AND " 1470 "(pid >= 2147483648 OR " 1471 "(expiration = 0 OR expiration ISNULL OR " 1472 "expiration > %d));", 1473 is_user_string, req->id1.idmap_id_u.sid.prefix, 1474 req->id1.idmap_id_u.sid.rid, curtime); 1475 } else if (req->id1name != NULL) { 1476 sql = sqlite_mprintf("SELECT pid, is_user, expiration, " 1477 "unixname, u2w, is_wuser " 1478 "FROM idmap_cache WHERE is_user = %s AND " 1479 "winname = %Q AND windomain = %Q AND w2u = 1 AND " 1480 "(pid >= 2147483648 OR " 1481 "(expiration = 0 OR expiration ISNULL OR " 1482 "expiration > %d));", 1483 is_user_string, req->id1name, req->id1domain, curtime); 1484 } else { 1485 retcode = IDMAP_ERR_ARG; 1486 goto out; 1487 } 1488 1489 if (sql == NULL) { 1490 idmapdlog(LOG_ERR, "Out of memory"); 1491 retcode = IDMAP_ERR_MEMORY; 1492 goto out; 1493 } 1494 retcode = sql_compile_n_step_once(cache, sql, &vm, &ncol, 6, &values); 1495 sqlite_freemem(sql); 1496 1497 if (retcode == IDMAP_ERR_NOTFOUND) { 1498 goto out; 1499 } else if (retcode == IDMAP_SUCCESS) { 1500 /* sanity checks */ 1501 if (values[0] == NULL || values[1] == NULL) { 1502 retcode = IDMAP_ERR_CACHE; 1503 goto out; 1504 } 1505 1506 pid = strtoul(values[0], &end, 10); 1507 is_user = strncmp(values[1], "0", 2) ? 1 : 0; 1508 1509 if (is_user) { 1510 res->id.idtype = IDMAP_UID; 1511 res->id.idmap_id_u.uid = pid; 1512 } else { 1513 res->id.idtype = IDMAP_GID; 1514 res->id.idmap_id_u.gid = pid; 1515 } 1516 1517 /* 1518 * We may have an expired ephemeral mapping. Consider 1519 * the expired entry as valid if we are not going to 1520 * perform name-based mapping. But do not renew the 1521 * expiration. 1522 * If we will be doing name-based mapping then store the 1523 * ephemeral pid in the result so that we can use it 1524 * if we end up doing dynamic mapping again. 1525 */ 1526 if (!DO_NOT_ALLOC_NEW_ID_MAPPING(req) && 1527 !AVOID_NAMESERVICE(req) && 1528 IS_EPHEMERAL(pid) && values[2] != NULL) { 1529 exp = strtoll(values[2], &end, 10); 1530 if (exp && exp <= curtime) { 1531 /* Store the ephemeral pid */ 1532 res->direction = IDMAP_DIRECTION_BI; 1533 req->direction |= is_user 1534 ? _IDMAP_F_EXP_EPH_UID 1535 : _IDMAP_F_EXP_EPH_GID; 1536 retcode = IDMAP_ERR_NOTFOUND; 1537 } 1538 } 1539 } 1540 1541 out: 1542 if (retcode == IDMAP_SUCCESS) { 1543 if (values[4] != NULL) 1544 res->direction = 1545 (strtol(values[4], &end, 10) == 0)? 1546 IDMAP_DIRECTION_W2U:IDMAP_DIRECTION_BI; 1547 else 1548 res->direction = IDMAP_DIRECTION_W2U; 1549 1550 if (values[3] != NULL) { 1551 if (req->id2name != NULL) 1552 free(req->id2name); 1553 req->id2name = strdup(values[3]); 1554 if (req->id2name == NULL) { 1555 idmapdlog(LOG_ERR, "Out of memory"); 1556 retcode = IDMAP_ERR_MEMORY; 1557 } 1558 } 1559 1560 req->id1.idtype = strncmp(values[5], "0", 2) ? 1561 IDMAP_USID : IDMAP_GSID; 1562 } 1563 if (vm != NULL) 1564 (void) sqlite_finalize(vm, NULL); 1565 return (retcode); 1566 } 1567 1568 static 1569 idmap_retcode 1570 lookup_cache_sid2name(sqlite *cache, const char *sidprefix, idmap_rid_t rid, 1571 char **name, char **domain, int *type) 1572 { 1573 char *end; 1574 char *sql = NULL; 1575 const char **values; 1576 sqlite_vm *vm = NULL; 1577 int ncol; 1578 time_t curtime; 1579 idmap_retcode retcode = IDMAP_SUCCESS; 1580 1581 /* Get current time */ 1582 errno = 0; 1583 if ((curtime = time(NULL)) == (time_t)-1) { 1584 idmapdlog(LOG_ERR, "Failed to get current time (%s)", 1585 strerror(errno)); 1586 retcode = IDMAP_ERR_INTERNAL; 1587 goto out; 1588 } 1589 1590 /* SQL to lookup the cache */ 1591 sql = sqlite_mprintf("SELECT canon_name, domain, type " 1592 "FROM name_cache WHERE " 1593 "sidprefix = %Q AND rid = %u AND " 1594 "(expiration = 0 OR expiration ISNULL OR " 1595 "expiration > %d);", 1596 sidprefix, rid, curtime); 1597 if (sql == NULL) { 1598 idmapdlog(LOG_ERR, "Out of memory"); 1599 retcode = IDMAP_ERR_MEMORY; 1600 goto out; 1601 } 1602 retcode = sql_compile_n_step_once(cache, sql, &vm, &ncol, 3, &values); 1603 sqlite_freemem(sql); 1604 1605 if (retcode == IDMAP_SUCCESS) { 1606 if (type != NULL) { 1607 if (values[2] == NULL) { 1608 retcode = IDMAP_ERR_CACHE; 1609 goto out; 1610 } 1611 *type = strtol(values[2], &end, 10); 1612 } 1613 1614 if (name != NULL && values[0] != NULL) { 1615 if ((*name = strdup(values[0])) == NULL) { 1616 idmapdlog(LOG_ERR, "Out of memory"); 1617 retcode = IDMAP_ERR_MEMORY; 1618 goto out; 1619 } 1620 } 1621 1622 if (domain != NULL && values[1] != NULL) { 1623 if ((*domain = strdup(values[1])) == NULL) { 1624 if (name != NULL && *name) { 1625 free(*name); 1626 *name = NULL; 1627 } 1628 idmapdlog(LOG_ERR, "Out of memory"); 1629 retcode = IDMAP_ERR_MEMORY; 1630 goto out; 1631 } 1632 } 1633 } 1634 1635 out: 1636 if (vm != NULL) 1637 (void) sqlite_finalize(vm, NULL); 1638 return (retcode); 1639 } 1640 1641 /* 1642 * Given SID, find winname using name_cache OR 1643 * Given winname, find SID using name_cache. 1644 * Used when mapping win to unix i.e. req->id1 is windows id and 1645 * req->id2 is unix id 1646 */ 1647 static 1648 idmap_retcode 1649 lookup_name_cache(sqlite *cache, idmap_mapping *req, idmap_id_res *res) 1650 { 1651 int type = -1; 1652 idmap_retcode retcode; 1653 char *sidprefix = NULL; 1654 idmap_rid_t rid; 1655 char *name = NULL, *domain = NULL; 1656 1657 /* Done if we've both sid and winname */ 1658 if (req->id1.idmap_id_u.sid.prefix != NULL && req->id1name != NULL) 1659 return (IDMAP_SUCCESS); 1660 1661 /* Lookup sid to winname */ 1662 if (req->id1.idmap_id_u.sid.prefix != NULL) { 1663 retcode = lookup_cache_sid2name(cache, 1664 req->id1.idmap_id_u.sid.prefix, 1665 req->id1.idmap_id_u.sid.rid, &name, &domain, &type); 1666 goto out; 1667 } 1668 1669 /* Lookup winame to sid */ 1670 retcode = lookup_cache_name2sid(cache, req->id1name, req->id1domain, 1671 &name, &sidprefix, &rid, &type); 1672 1673 out: 1674 if (retcode != IDMAP_SUCCESS) { 1675 free(name); 1676 free(domain); 1677 free(sidprefix); 1678 return (retcode); 1679 } 1680 1681 if (res->id.idtype == IDMAP_POSIXID) { 1682 res->id.idtype = (type == _IDMAP_T_USER) ? 1683 IDMAP_UID : IDMAP_GID; 1684 } 1685 req->id1.idtype = (type == _IDMAP_T_USER) ? 1686 IDMAP_USID : IDMAP_GSID; 1687 1688 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 1689 if (name != NULL) { 1690 free(req->id1name); /* Free existing winname */ 1691 req->id1name = name; /* and use canonical name instead */ 1692 } 1693 if (req->id1domain == NULL) 1694 req->id1domain = domain; 1695 if (req->id1.idmap_id_u.sid.prefix == NULL) { 1696 req->id1.idmap_id_u.sid.prefix = sidprefix; 1697 req->id1.idmap_id_u.sid.rid = rid; 1698 } 1699 return (retcode); 1700 } 1701 1702 /* 1703 * Batch AD lookups 1704 */ 1705 idmap_retcode 1706 ad_lookup_batch(lookup_state_t *state, idmap_mapping_batch *batch, 1707 idmap_ids_res *result) 1708 { 1709 idmap_retcode retcode; 1710 int i, add, type, is_wuser, is_user; 1711 int retries = 0, eunixtype; 1712 char **unixname; 1713 idmap_mapping *req; 1714 idmap_id_res *res; 1715 idmap_query_state_t *qs = NULL; 1716 1717 /* 1718 * Since req->id2.idtype is unused, we will use it here 1719 * to retrieve the value of sid_type. But it needs to be 1720 * reset to IDMAP_NONE before we return to prevent xdr 1721 * from mis-interpreting req->id2 when it tries to free 1722 * the input argument. Other option is to allocate an 1723 * array of integers and use it instead for the batched 1724 * call. But why un-necessarily allocate memory. That may 1725 * be an option if req->id2.idtype cannot be re-used in 1726 * future. 1727 */ 1728 1729 if (state->ad_nqueries == 0) 1730 return (IDMAP_SUCCESS); 1731 1732 retry: 1733 retcode = idmap_lookup_batch_start(_idmapdstate.ad, state->ad_nqueries, 1734 &qs); 1735 if (retcode != IDMAP_SUCCESS) { 1736 degrade_svc(); 1737 idmapdlog(LOG_ERR, 1738 "Failed to create batch for AD lookup"); 1739 goto out; 1740 } 1741 1742 restore_svc(); 1743 1744 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 1745 state->ad_unixgroup_attr); 1746 1747 for (i = 0, add = 0; i < batch->idmap_mapping_batch_len; i++) { 1748 req = &batch->idmap_mapping_batch_val[i]; 1749 res = &result->ids.ids_val[i]; 1750 retcode = IDMAP_SUCCESS; 1751 req->id2.idtype = IDMAP_NONE; 1752 1753 /* Skip if not marked for AD lookup */ 1754 if (!(req->direction & _IDMAP_F_LOOKUP_AD)) 1755 continue; 1756 1757 if (retries == 0) 1758 res->retcode = IDMAP_ERR_RETRIABLE_NET_ERR; 1759 else if (res->retcode != IDMAP_ERR_RETRIABLE_NET_ERR) 1760 continue; 1761 1762 if (IS_REQUEST_SID(*req, 1)) { 1763 /* win to unix */ 1764 1765 assert(req->id1.idmap_id_u.sid.prefix != NULL); 1766 1767 /* Lookup AD by SID */ 1768 unixname = NULL; 1769 eunixtype = _IDMAP_T_UNDEF; 1770 if (req->id2name == NULL) { 1771 if (res->id.idtype == IDMAP_UID && 1772 AD_OR_MIXED(state->nm_siduid)) { 1773 eunixtype = _IDMAP_T_USER; 1774 unixname = &req->id2name; 1775 } else if (res->id.idtype == IDMAP_GID && 1776 AD_OR_MIXED(state->nm_sidgid)) { 1777 eunixtype = _IDMAP_T_GROUP; 1778 unixname = &req->id2name; 1779 } else if (AD_OR_MIXED(state->nm_siduid) || 1780 AD_OR_MIXED(state->nm_sidgid)) { 1781 unixname = &req->id2name; 1782 } 1783 } 1784 add = 1; 1785 retcode = idmap_sid2name_batch_add1( 1786 qs, req->id1.idmap_id_u.sid.prefix, 1787 &req->id1.idmap_id_u.sid.rid, eunixtype, 1788 (req->id1name == NULL) ? &req->id1name : NULL, 1789 (req->id1domain == NULL) ? &req->id1domain : NULL, 1790 (int *)&req->id2.idtype, unixname, &res->retcode); 1791 1792 } else if (IS_REQUEST_UID(*req) || IS_REQUEST_GID(*req)) { 1793 /* unix to win */ 1794 1795 if (res->id.idmap_id_u.sid.prefix != NULL && 1796 req->id2name != NULL) { 1797 /* Already have SID and winname -- done */ 1798 res->retcode = IDMAP_SUCCESS; 1799 continue; 1800 } 1801 1802 if (res->id.idmap_id_u.sid.prefix != NULL) { 1803 /* 1804 * SID but no winname -- lookup AD by 1805 * SID to get winname. 1806 */ 1807 add = 1; 1808 retcode = idmap_sid2name_batch_add1( 1809 qs, res->id.idmap_id_u.sid.prefix, 1810 &res->id.idmap_id_u.sid.rid, 1811 _IDMAP_T_UNDEF, &req->id2name, 1812 &req->id2domain, (int *)&req->id2.idtype, 1813 NULL, &res->retcode); 1814 } else if (req->id2name != NULL) { 1815 /* 1816 * winname but no SID -- lookup AD by 1817 * winname to get SID. 1818 */ 1819 add = 1; 1820 retcode = idmap_name2sid_batch_add1( 1821 qs, req->id2name, req->id2domain, 1822 _IDMAP_T_UNDEF, NULL, 1823 &res->id.idmap_id_u.sid.prefix, 1824 &res->id.idmap_id_u.sid.rid, 1825 (int *)&req->id2.idtype, NULL, 1826 &res->retcode); 1827 } else if (req->id1name != NULL) { 1828 /* 1829 * No SID and no winname but we've unixname -- 1830 * lookup AD by unixname to get SID. 1831 */ 1832 is_user = (IS_REQUEST_UID(*req)) ? 1 : 0; 1833 if (res->id.idtype == IDMAP_USID) 1834 is_wuser = 1; 1835 else if (res->id.idtype == IDMAP_GSID) 1836 is_wuser = 0; 1837 else 1838 is_wuser = is_user; 1839 add = 1; 1840 retcode = idmap_unixname2sid_batch_add1( 1841 qs, req->id1name, is_user, is_wuser, 1842 &res->id.idmap_id_u.sid.prefix, 1843 &res->id.idmap_id_u.sid.rid, 1844 &req->id2name, &req->id2domain, 1845 (int *)&req->id2.idtype, &res->retcode); 1846 } 1847 } 1848 if (retcode != IDMAP_SUCCESS) { 1849 idmap_lookup_release_batch(&qs); 1850 break; 1851 } 1852 } 1853 1854 if (retcode == IDMAP_SUCCESS && add) 1855 retcode = idmap_lookup_batch_end(&qs, NULL); 1856 1857 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 1858 goto retry; 1859 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 1860 degrade_svc(); 1861 1862 if (retcode != IDMAP_SUCCESS) 1863 idmapdlog(LOG_NOTICE, "Failed to batch AD lookup requests"); 1864 1865 out: 1866 /* 1867 * This loop does the following: 1868 * 1) If there are errors in creating or submitting the batch then 1869 * we set the retcode for each request (res->retcode) that's part 1870 * of the batch to that error. If there were no such errors then 1871 * res->retcode for each request will reflect the status of AD 1872 * lookup for that particular request. Initial value of 1873 * res->retcode is IDMAP_ERR_RETRIABLE_NET_ERR. 1874 * 2) If AD lookup for a given request succeeds then evaluate the 1875 * type of the AD object (i.e user or group) and update the 1876 * idtype in res and req. 1877 * 3) Reset req->id2.idtype to IDMAP_NONE. 1878 */ 1879 for (i = 0; i < batch->idmap_mapping_batch_len; i++) { 1880 req = &batch->idmap_mapping_batch_val[i]; 1881 type = req->id2.idtype; 1882 req->id2.idtype = IDMAP_NONE; 1883 res = &result->ids.ids_val[i]; 1884 1885 if (!(req->direction & _IDMAP_F_LOOKUP_AD)) 1886 /* Entry that wasn't marked for AD lookup - skip */ 1887 continue; 1888 1889 if (retcode != IDMAP_SUCCESS) { 1890 res->retcode = retcode; 1891 continue; 1892 } 1893 1894 if (!add) 1895 continue; 1896 1897 1898 if (IS_REQUEST_SID(*req, 1)) { 1899 if (res->retcode != IDMAP_SUCCESS) 1900 continue; 1901 switch (type) { 1902 case _IDMAP_T_USER: 1903 if (res->id.idtype == IDMAP_POSIXID) 1904 res->id.idtype = IDMAP_UID; 1905 req->id1.idtype = IDMAP_USID; 1906 break; 1907 case _IDMAP_T_GROUP: 1908 if (res->id.idtype == IDMAP_POSIXID) 1909 res->id.idtype = IDMAP_GID; 1910 req->id1.idtype = IDMAP_GSID; 1911 break; 1912 default: 1913 res->retcode = IDMAP_ERR_SID; 1914 break; 1915 } 1916 } else if (IS_REQUEST_UID(*req) || IS_REQUEST_GID(*req)) { 1917 if (res->retcode != IDMAP_SUCCESS) { 1918 if ((!(IDMAP_FATAL_ERROR(res->retcode))) && 1919 res->id.idmap_id_u.sid.prefix == NULL && 1920 req->id2name == NULL && /* no winname */ 1921 req->id1name != NULL) /* unixname */ 1922 /* 1923 * Here we have a pid2sid request 1924 * that was marked for AD lookup 1925 * with no SID, no winname but with 1926 * unixname. This request was 1927 * added to the batch to do AD lookup 1928 * by unixname but it failed with non 1929 * fatal error. In such case we 1930 * ignore the error (i.e set 1931 * res->retcode to success) so that 1932 * next pass considers it for name 1933 * based mapping rules or ephemeral 1934 * mapping. 1935 */ 1936 res->retcode = IDMAP_SUCCESS; 1937 continue; 1938 } 1939 switch (type) { 1940 case _IDMAP_T_USER: 1941 if (res->id.idtype == IDMAP_SID) 1942 res->id.idtype = IDMAP_USID; 1943 break; 1944 case _IDMAP_T_GROUP: 1945 if (res->id.idtype == IDMAP_SID) 1946 res->id.idtype = IDMAP_GSID; 1947 break; 1948 default: 1949 res->retcode = IDMAP_ERR_SID; 1950 break; 1951 } 1952 } 1953 } 1954 1955 /* AD lookups done. Reset state->ad_nqueries and return */ 1956 state->ad_nqueries = 0; 1957 return (retcode); 1958 } 1959 1960 /* 1961 * Convention when processing win2unix requests: 1962 * 1963 * Windows identity: 1964 * req->id1name = 1965 * winname if given otherwise winname found will be placed 1966 * here. 1967 * req->id1domain = 1968 * windomain if given otherwise windomain found will be 1969 * placed here. 1970 * req->id1.idtype = 1971 * Either IDMAP_SID/USID/GSID. If this is IDMAP_SID then it'll 1972 * be set to IDMAP_USID/GSID depending upon whether the 1973 * given SID is user or group respectively. The user/group-ness 1974 * is determined either when looking up well-known SIDs table OR 1975 * if the SID is found in namecache OR by ad_lookup() OR by 1976 * ad_lookup_batch(). 1977 * req->id1..sid.[prefix, rid] = 1978 * SID if given otherwise SID found will be placed here. 1979 * 1980 * Unix identity: 1981 * req->id2name = 1982 * unixname found will be placed here. 1983 * req->id2domain = 1984 * NOT USED 1985 * res->id.idtype = 1986 * Target type initialized from req->id2.idtype. If 1987 * it is IDMAP_POSIXID then actual type (IDMAP_UID/GID) found 1988 * will be placed here. 1989 * res->id..[uid or gid] = 1990 * UID/GID found will be placed here. 1991 * 1992 * Others: 1993 * res->retcode = 1994 * Return status for this request will be placed here. 1995 * res->direction = 1996 * Direction found will be placed here. Direction 1997 * meaning whether the resultant mapping is valid 1998 * only from win2unix or bi-directional. 1999 * req->direction = 2000 * INTERNAL USE. Used by idmapd to set various 2001 * flags (_IDMAP_F_xxxx) to aid in processing 2002 * of the request. 2003 * req->id2.idtype = 2004 * INTERNAL USE. Initially this is the requested target 2005 * type and is used to initialize res->id.idtype. 2006 * ad_lookup_batch() uses this field temporarily to store 2007 * sid_type obtained by the batched AD lookups and after 2008 * use resets it to IDMAP_NONE to prevent xdr from 2009 * mis-interpreting the contents of req->id2. 2010 * req->id2..[uid or gid or sid] = 2011 * NOT USED 2012 */ 2013 2014 /* 2015 * This function does the following: 2016 * 1. Lookup well-known SIDs table. 2017 * 2. Check if the given SID is a local-SID and if so extract UID/GID from it. 2018 * 3. Lookup cache. 2019 * 4. Check if the client does not want new mapping to be allocated 2020 * in which case this pass is the final pass. 2021 * 5. Set AD lookup flag if it determines that the next stage needs 2022 * to do AD lookup. 2023 */ 2024 idmap_retcode 2025 sid2pid_first_pass(lookup_state_t *state, sqlite *cache, idmap_mapping *req, 2026 idmap_id_res *res) 2027 { 2028 idmap_retcode retcode; 2029 int wksid; 2030 2031 /* Initialize result */ 2032 res->id.idtype = req->id2.idtype; 2033 res->id.idmap_id_u.uid = SENTINEL_PID; 2034 res->direction = IDMAP_DIRECTION_UNDEF; 2035 wksid = 0; 2036 2037 if (EMPTY_STRING(req->id1.idmap_id_u.sid.prefix)) { 2038 if (req->id1name == NULL) { 2039 retcode = IDMAP_ERR_ARG; 2040 goto out; 2041 } 2042 /* sanitize sidprefix */ 2043 free(req->id1.idmap_id_u.sid.prefix); 2044 req->id1.idmap_id_u.sid.prefix = NULL; 2045 } 2046 2047 /* Lookup well-known SIDs table */ 2048 retcode = lookup_wksids_sid2pid(req, res, &wksid); 2049 if (retcode != IDMAP_ERR_NOTFOUND) 2050 goto out; 2051 2052 /* Check if this is a localsid */ 2053 if (!wksid) { 2054 retcode = lookup_localsid2pid(req, res); 2055 if (retcode != IDMAP_ERR_NOTFOUND) 2056 goto out; 2057 } 2058 2059 /* Lookup cache */ 2060 retcode = lookup_cache_sid2pid(cache, req, res); 2061 if (retcode != IDMAP_ERR_NOTFOUND) 2062 goto out; 2063 2064 if (DO_NOT_ALLOC_NEW_ID_MAPPING(req) || AVOID_NAMESERVICE(req)) { 2065 retcode = IDMAP_ERR_NOMAPPING; 2066 goto out; 2067 } 2068 2069 /* 2070 * Failed to find non-expired entry in cache. Next step is 2071 * to determine if this request needs to be batched for AD lookup. 2072 * 2073 * At this point we have either sid or winname or both. If we don't 2074 * have both then lookup name_cache for the sid or winname 2075 * whichever is missing. If not found then this request will be 2076 * batched for AD lookup. 2077 */ 2078 retcode = lookup_name_cache(cache, req, res); 2079 if (retcode != IDMAP_SUCCESS && retcode != IDMAP_ERR_NOTFOUND) 2080 goto out; 2081 2082 /* 2083 * Set the flag to indicate that we are not done yet so that 2084 * subsequent passes considers this request for name-based 2085 * mapping and ephemeral mapping. 2086 */ 2087 state->sid2pid_done = FALSE; 2088 req->direction |= _IDMAP_F_NOTDONE; 2089 2090 /* 2091 * Even if we have both sid and winname, we still may need to batch 2092 * this request for AD lookup if we don't have unixname and 2093 * directory-based name mapping (AD or mixed) is enabled. 2094 * We avoid AD lookup for well-known SIDs because they don't have 2095 * regular AD objects. 2096 */ 2097 if (retcode != IDMAP_SUCCESS || 2098 (!wksid && req->id2name == NULL && 2099 AD_OR_MIXED_MODE(res->id.idtype, state))) { 2100 retcode = IDMAP_SUCCESS; 2101 req->direction |= _IDMAP_F_LOOKUP_AD; 2102 state->ad_nqueries++; 2103 } 2104 2105 2106 out: 2107 res->retcode = idmap_stat4prot(retcode); 2108 /* 2109 * If we are done and there was an error then set fallback pid 2110 * in the result. 2111 */ 2112 if (ARE_WE_DONE(req->direction) && res->retcode != IDMAP_SUCCESS) 2113 res->id.idmap_id_u.uid = UID_NOBODY; 2114 return (retcode); 2115 } 2116 2117 /* 2118 * Generate SID using the following convention 2119 * <machine-sid-prefix>-<1000 + uid> 2120 * <machine-sid-prefix>-<2^31 + gid> 2121 */ 2122 static 2123 idmap_retcode 2124 generate_localsid(idmap_mapping *req, idmap_id_res *res, int is_user) 2125 { 2126 free(res->id.idmap_id_u.sid.prefix); 2127 res->id.idmap_id_u.sid.prefix = NULL; 2128 2129 /* 2130 * Diagonal mapping for localSIDs not supported because of the 2131 * way we generate localSIDs. 2132 */ 2133 if (is_user && res->id.idtype == IDMAP_GSID) 2134 return (IDMAP_ERR_NOMAPPING); 2135 if (!is_user && res->id.idtype == IDMAP_USID) 2136 return (IDMAP_ERR_NOMAPPING); 2137 2138 /* Skip 1000 UIDs */ 2139 if (is_user && req->id1.idmap_id_u.uid > 2140 (INT32_MAX - LOCALRID_MIN)) 2141 return (IDMAP_ERR_NOMAPPING); 2142 2143 RDLOCK_CONFIG(); 2144 /* 2145 * machine_sid is never NULL because if it is we won't be here. 2146 * No need to assert because stdrup(NULL) will core anyways. 2147 */ 2148 res->id.idmap_id_u.sid.prefix = 2149 strdup(_idmapdstate.cfg->pgcfg.machine_sid); 2150 if (res->id.idmap_id_u.sid.prefix == NULL) { 2151 UNLOCK_CONFIG(); 2152 idmapdlog(LOG_ERR, "Out of memory"); 2153 return (IDMAP_ERR_MEMORY); 2154 } 2155 UNLOCK_CONFIG(); 2156 res->id.idmap_id_u.sid.rid = 2157 (is_user) ? req->id1.idmap_id_u.uid + LOCALRID_MIN : 2158 req->id1.idmap_id_u.gid + INT32_MAX + 1; 2159 res->direction = IDMAP_DIRECTION_BI; 2160 if (res->id.idtype == IDMAP_SID) 2161 res->id.idtype = is_user ? IDMAP_USID : IDMAP_GSID; 2162 2163 /* 2164 * Don't update name_cache because local sids don't have 2165 * valid windows names. 2166 */ 2167 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 2168 return (IDMAP_SUCCESS); 2169 } 2170 2171 static 2172 idmap_retcode 2173 lookup_localsid2pid(idmap_mapping *req, idmap_id_res *res) 2174 { 2175 char *sidprefix; 2176 uint32_t rid; 2177 int s; 2178 2179 /* 2180 * If the sidprefix == localsid then UID = last RID - 1000 or 2181 * GID = last RID - 2^31. 2182 */ 2183 if ((sidprefix = req->id1.idmap_id_u.sid.prefix) == NULL) 2184 /* This means we are looking up by winname */ 2185 return (IDMAP_ERR_NOTFOUND); 2186 rid = req->id1.idmap_id_u.sid.rid; 2187 2188 RDLOCK_CONFIG(); 2189 s = (_idmapdstate.cfg->pgcfg.machine_sid) ? 2190 strcasecmp(sidprefix, _idmapdstate.cfg->pgcfg.machine_sid) : 1; 2191 UNLOCK_CONFIG(); 2192 2193 /* 2194 * If the given sidprefix does not match machine_sid then this is 2195 * not a local SID. 2196 */ 2197 if (s != 0) 2198 return (IDMAP_ERR_NOTFOUND); 2199 2200 switch (res->id.idtype) { 2201 case IDMAP_UID: 2202 if (rid > INT32_MAX || rid < LOCALRID_MIN) 2203 return (IDMAP_ERR_ARG); 2204 res->id.idmap_id_u.uid = rid - LOCALRID_MIN; 2205 break; 2206 case IDMAP_GID: 2207 if (rid <= INT32_MAX) 2208 return (IDMAP_ERR_ARG); 2209 res->id.idmap_id_u.gid = rid - INT32_MAX - 1; 2210 break; 2211 case IDMAP_POSIXID: 2212 if (rid > INT32_MAX) { 2213 res->id.idmap_id_u.gid = rid - INT32_MAX - 1; 2214 res->id.idtype = IDMAP_GID; 2215 } else if (rid < LOCALRID_MIN) { 2216 return (IDMAP_ERR_ARG); 2217 } else { 2218 res->id.idmap_id_u.uid = rid - LOCALRID_MIN; 2219 res->id.idtype = IDMAP_UID; 2220 } 2221 break; 2222 default: 2223 return (IDMAP_ERR_NOTSUPPORTED); 2224 } 2225 return (IDMAP_SUCCESS); 2226 } 2227 2228 /* 2229 * Name service lookup by unixname to get pid 2230 */ 2231 static 2232 idmap_retcode 2233 ns_lookup_byname(const char *name, const char *lower_name, idmap_id *id) 2234 { 2235 struct passwd pwd, *pwdp; 2236 struct group grp, *grpp; 2237 char buf[1024]; 2238 int errnum; 2239 const char *me = "ns_lookup_byname"; 2240 2241 switch (id->idtype) { 2242 case IDMAP_UID: 2243 pwdp = getpwnam_r(name, &pwd, buf, sizeof (buf)); 2244 if (pwdp == NULL && errno == 0 && lower_name != NULL && 2245 name != lower_name && strcmp(name, lower_name) != 0) 2246 pwdp = getpwnam_r(lower_name, &pwd, buf, sizeof (buf)); 2247 if (pwdp == NULL) { 2248 errnum = errno; 2249 idmapdlog(LOG_WARNING, 2250 "%s: getpwnam_r(%s) failed (%s).", 2251 me, name, errnum ? strerror(errnum) : "not found"); 2252 if (errnum == 0) 2253 return (IDMAP_ERR_NOTFOUND); 2254 else 2255 return (IDMAP_ERR_INTERNAL); 2256 } 2257 id->idmap_id_u.uid = pwd.pw_uid; 2258 break; 2259 case IDMAP_GID: 2260 grpp = getgrnam_r(name, &grp, buf, sizeof (buf)); 2261 if (grpp == NULL && errno == 0 && lower_name != NULL && 2262 name != lower_name && strcmp(name, lower_name) != 0) 2263 grpp = getgrnam_r(lower_name, &grp, buf, sizeof (buf)); 2264 if (grpp == NULL) { 2265 errnum = errno; 2266 idmapdlog(LOG_WARNING, 2267 "%s: getgrnam_r(%s) failed (%s).", 2268 me, name, errnum ? strerror(errnum) : "not found"); 2269 if (errnum == 0) 2270 return (IDMAP_ERR_NOTFOUND); 2271 else 2272 return (IDMAP_ERR_INTERNAL); 2273 } 2274 id->idmap_id_u.gid = grp.gr_gid; 2275 break; 2276 default: 2277 return (IDMAP_ERR_ARG); 2278 } 2279 return (IDMAP_SUCCESS); 2280 } 2281 2282 2283 /* 2284 * Name service lookup by pid to get unixname 2285 */ 2286 static 2287 idmap_retcode 2288 ns_lookup_bypid(uid_t pid, int is_user, char **unixname) 2289 { 2290 struct passwd pwd; 2291 struct group grp; 2292 char buf[1024]; 2293 int errnum; 2294 const char *me = "ns_lookup_bypid"; 2295 2296 if (is_user) { 2297 errno = 0; 2298 if (getpwuid_r(pid, &pwd, buf, sizeof (buf)) == NULL) { 2299 errnum = errno; 2300 idmapdlog(LOG_WARNING, 2301 "%s: getpwuid_r(%u) failed (%s).", 2302 me, pid, errnum ? strerror(errnum) : "not found"); 2303 if (errnum == 0) 2304 return (IDMAP_ERR_NOTFOUND); 2305 else 2306 return (IDMAP_ERR_INTERNAL); 2307 } 2308 *unixname = strdup(pwd.pw_name); 2309 } else { 2310 errno = 0; 2311 if (getgrgid_r(pid, &grp, buf, sizeof (buf)) == NULL) { 2312 errnum = errno; 2313 idmapdlog(LOG_WARNING, 2314 "%s: getgrgid_r(%u) failed (%s).", 2315 me, pid, errnum ? strerror(errnum) : "not found"); 2316 if (errnum == 0) 2317 return (IDMAP_ERR_NOTFOUND); 2318 else 2319 return (IDMAP_ERR_INTERNAL); 2320 } 2321 *unixname = strdup(grp.gr_name); 2322 } 2323 if (*unixname == NULL) 2324 return (IDMAP_ERR_MEMORY); 2325 return (IDMAP_SUCCESS); 2326 } 2327 2328 /* 2329 * Name-based mapping 2330 * 2331 * Case 1: If no rule matches do ephemeral 2332 * 2333 * Case 2: If rule matches and unixname is "" then return no mapping. 2334 * 2335 * Case 3: If rule matches and unixname is specified then lookup name 2336 * service using the unixname. If unixname not found then return no mapping. 2337 * 2338 * Case 4: If rule matches and unixname is * then lookup name service 2339 * using winname as the unixname. If unixname not found then process 2340 * other rules using the lookup order. If no other rule matches then do 2341 * ephemeral. Otherwise, based on the matched rule do Case 2 or 3 or 4. 2342 * This allows us to specify a fallback unixname per _domain_ or no mapping 2343 * instead of the default behaviour of doing ephemeral mapping. 2344 * 2345 * Example 1: 2346 * *@sfbay == * 2347 * If looking up windows users foo@sfbay and foo does not exists in 2348 * the name service then foo@sfbay will be mapped to an ephemeral id. 2349 * 2350 * Example 2: 2351 * *@sfbay == * 2352 * *@sfbay => guest 2353 * If looking up windows users foo@sfbay and foo does not exists in 2354 * the name service then foo@sfbay will be mapped to guest. 2355 * 2356 * Example 3: 2357 * *@sfbay == * 2358 * *@sfbay => "" 2359 * If looking up windows users foo@sfbay and foo does not exists in 2360 * the name service then we will return no mapping for foo@sfbay. 2361 * 2362 */ 2363 static 2364 idmap_retcode 2365 name_based_mapping_sid2pid(sqlite *db, idmap_mapping *req, idmap_id_res *res) 2366 { 2367 const char *unixname, *windomain; 2368 char *sql = NULL, *errmsg = NULL, *lower_winname = NULL; 2369 idmap_retcode retcode; 2370 char *end, *lower_unixname, *winname; 2371 const char **values; 2372 sqlite_vm *vm = NULL; 2373 int ncol, r, i, is_user, is_wuser; 2374 const char *me = "name_based_mapping_sid2pid"; 2375 2376 assert(req->id1name != NULL); /* We have winname */ 2377 assert(req->id2name == NULL); /* We don't have unixname */ 2378 2379 winname = req->id1name; 2380 windomain = req->id1domain; 2381 2382 switch (req->id1.idtype) { 2383 case IDMAP_USID: 2384 is_wuser = 1; 2385 break; 2386 case IDMAP_GSID: 2387 is_wuser = 0; 2388 break; 2389 default: 2390 idmapdlog(LOG_ERR, "%s: Unable to determine if the " 2391 "given Windows id is user or group.", me); 2392 return (IDMAP_ERR_INTERNAL); 2393 } 2394 2395 switch (res->id.idtype) { 2396 case IDMAP_UID: 2397 is_user = 1; 2398 break; 2399 case IDMAP_GID: 2400 is_user = 0; 2401 break; 2402 case IDMAP_POSIXID: 2403 is_user = is_wuser; 2404 res->id.idtype = is_user ? IDMAP_UID : IDMAP_GID; 2405 break; 2406 } 2407 2408 i = 0; 2409 if (windomain == NULL) { 2410 windomain = ""; 2411 } else { 2412 RDLOCK_CONFIG(); 2413 if (_idmapdstate.cfg->pgcfg.default_domain != NULL) { 2414 if (strcasecmp(_idmapdstate.cfg->pgcfg.default_domain, 2415 windomain) == 0) 2416 i = 1; 2417 } 2418 UNLOCK_CONFIG(); 2419 } 2420 2421 if ((lower_winname = tolower_u8(winname)) == NULL) 2422 lower_winname = winname; /* hope for the best */ 2423 sql = sqlite_mprintf( 2424 "SELECT unixname, u2w_order FROM namerules WHERE " 2425 "w2u_order > 0 AND is_user = %d AND is_wuser = %d AND " 2426 "(winname = %Q OR winname = '*') AND " 2427 "(windomain = %Q OR windomain = '*' %s) " 2428 "ORDER BY w2u_order ASC;", 2429 is_user, is_wuser, lower_winname, windomain, 2430 i ? "OR windomain ISNULL OR windomain = ''" : ""); 2431 if (sql == NULL) { 2432 idmapdlog(LOG_ERR, "Out of memory"); 2433 retcode = IDMAP_ERR_MEMORY; 2434 goto out; 2435 } 2436 2437 if (sqlite_compile(db, sql, NULL, &vm, &errmsg) != SQLITE_OK) { 2438 retcode = IDMAP_ERR_INTERNAL; 2439 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 2440 CHECK_NULL(errmsg)); 2441 sqlite_freemem(errmsg); 2442 goto out; 2443 } 2444 2445 for (; ; ) { 2446 r = sqlite_step(vm, &ncol, &values, NULL); 2447 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 2448 2449 if (r == SQLITE_ROW) { 2450 if (ncol < 2) { 2451 retcode = IDMAP_ERR_INTERNAL; 2452 goto out; 2453 } 2454 if (values[0] == NULL) { 2455 retcode = IDMAP_ERR_INTERNAL; 2456 goto out; 2457 } 2458 2459 if (EMPTY_NAME(values[0])) { 2460 retcode = IDMAP_ERR_NOMAPPING; 2461 goto out; 2462 } 2463 unixname = (values[0][0] == '*') ? winname : values[0]; 2464 lower_unixname = (values[0][0] == '*') ? 2465 lower_winname : NULL; 2466 retcode = ns_lookup_byname(unixname, lower_unixname, 2467 &res->id); 2468 if (retcode == IDMAP_ERR_NOTFOUND) { 2469 if (unixname == winname) 2470 /* Case 4 */ 2471 continue; 2472 else 2473 /* Case 3 */ 2474 retcode = IDMAP_ERR_NOMAPPING; 2475 } 2476 goto out; 2477 } else if (r == SQLITE_DONE) { 2478 retcode = IDMAP_ERR_NOTFOUND; 2479 goto out; 2480 } else { 2481 (void) sqlite_finalize(vm, &errmsg); 2482 vm = NULL; 2483 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 2484 CHECK_NULL(errmsg)); 2485 sqlite_freemem(errmsg); 2486 retcode = IDMAP_ERR_INTERNAL; 2487 goto out; 2488 } 2489 } 2490 2491 out: 2492 sqlite_freemem(sql); 2493 if (retcode == IDMAP_SUCCESS) { 2494 if (values[1] != NULL) 2495 res->direction = 2496 (strtol(values[1], &end, 10) == 0)? 2497 IDMAP_DIRECTION_W2U:IDMAP_DIRECTION_BI; 2498 else 2499 res->direction = IDMAP_DIRECTION_W2U; 2500 req->id2name = strdup(unixname); 2501 } 2502 if (lower_winname != NULL && lower_winname != winname) 2503 free(lower_winname); 2504 if (vm != NULL) 2505 (void) sqlite_finalize(vm, NULL); 2506 return (retcode); 2507 } 2508 2509 static 2510 int 2511 get_next_eph_uid(uid_t *next_uid) 2512 { 2513 uid_t uid; 2514 gid_t gid; 2515 int err; 2516 2517 *next_uid = (uid_t)-1; 2518 uid = _idmapdstate.next_uid++; 2519 if (uid >= _idmapdstate.limit_uid) { 2520 if ((err = allocids(0, 8192, &uid, 0, &gid)) != 0) 2521 return (err); 2522 2523 _idmapdstate.limit_uid = uid + 8192; 2524 _idmapdstate.next_uid = uid; 2525 } 2526 *next_uid = uid; 2527 2528 return (0); 2529 } 2530 2531 static 2532 int 2533 get_next_eph_gid(gid_t *next_gid) 2534 { 2535 uid_t uid; 2536 gid_t gid; 2537 int err; 2538 2539 *next_gid = (uid_t)-1; 2540 gid = _idmapdstate.next_gid++; 2541 if (gid >= _idmapdstate.limit_gid) { 2542 if ((err = allocids(0, 0, &uid, 8192, &gid)) != 0) 2543 return (err); 2544 2545 _idmapdstate.limit_gid = gid + 8192; 2546 _idmapdstate.next_gid = gid; 2547 } 2548 *next_gid = gid; 2549 2550 return (0); 2551 } 2552 2553 static 2554 int 2555 gethash(const char *str, uint32_t num, uint_t htsize) 2556 { 2557 uint_t hval, i, len; 2558 2559 if (str == NULL) 2560 return (0); 2561 for (len = strlen(str), hval = 0, i = 0; i < len; i++) { 2562 hval += str[i]; 2563 hval += (hval << 10); 2564 hval ^= (hval >> 6); 2565 } 2566 for (str = (const char *)&num, i = 0; i < sizeof (num); i++) { 2567 hval += str[i]; 2568 hval += (hval << 10); 2569 hval ^= (hval >> 6); 2570 } 2571 hval += (hval << 3); 2572 hval ^= (hval >> 11); 2573 hval += (hval << 15); 2574 return (hval % htsize); 2575 } 2576 2577 static 2578 int 2579 get_from_sid_history(lookup_state_t *state, const char *prefix, uint32_t rid, 2580 uid_t *pid) 2581 { 2582 uint_t next, key; 2583 uint_t htsize = state->sid_history_size; 2584 idmap_sid *sid; 2585 2586 next = gethash(prefix, rid, htsize); 2587 while (next != htsize) { 2588 key = state->sid_history[next].key; 2589 if (key == htsize) 2590 return (0); 2591 sid = &state->batch->idmap_mapping_batch_val[key].id1. 2592 idmap_id_u.sid; 2593 if (sid->rid == rid && strcmp(sid->prefix, prefix) == 0) { 2594 *pid = state->result->ids.ids_val[key].id. 2595 idmap_id_u.uid; 2596 return (1); 2597 } 2598 next = state->sid_history[next].next; 2599 } 2600 return (0); 2601 } 2602 2603 static 2604 void 2605 add_to_sid_history(lookup_state_t *state, const char *prefix, uint32_t rid) 2606 { 2607 uint_t hash, next; 2608 uint_t htsize = state->sid_history_size; 2609 2610 hash = next = gethash(prefix, rid, htsize); 2611 while (state->sid_history[next].key != htsize) { 2612 next++; 2613 next %= htsize; 2614 } 2615 state->sid_history[next].key = state->curpos; 2616 if (hash == next) 2617 return; 2618 state->sid_history[next].next = state->sid_history[hash].next; 2619 state->sid_history[hash].next = next; 2620 } 2621 2622 void 2623 cleanup_lookup_state(lookup_state_t *state) 2624 { 2625 free(state->sid_history); 2626 free(state->ad_unixuser_attr); 2627 free(state->ad_unixgroup_attr); 2628 } 2629 2630 /* ARGSUSED */ 2631 static 2632 idmap_retcode 2633 dynamic_ephemeral_mapping(lookup_state_t *state, sqlite *cache, 2634 idmap_mapping *req, idmap_id_res *res) 2635 { 2636 2637 uid_t next_pid; 2638 2639 res->direction = IDMAP_DIRECTION_BI; 2640 2641 if (IS_EPHEMERAL(res->id.idmap_id_u.uid)) 2642 return (IDMAP_SUCCESS); 2643 2644 if (state->sid_history != NULL && 2645 get_from_sid_history(state, req->id1.idmap_id_u.sid.prefix, 2646 req->id1.idmap_id_u.sid.rid, &next_pid)) { 2647 res->id.idmap_id_u.uid = next_pid; 2648 return (IDMAP_SUCCESS); 2649 } 2650 2651 if (res->id.idtype == IDMAP_UID) { 2652 if (get_next_eph_uid(&next_pid) != 0) 2653 return (IDMAP_ERR_INTERNAL); 2654 res->id.idmap_id_u.uid = next_pid; 2655 } else { 2656 if (get_next_eph_gid(&next_pid) != 0) 2657 return (IDMAP_ERR_INTERNAL); 2658 res->id.idmap_id_u.gid = next_pid; 2659 } 2660 2661 if (state->sid_history != NULL) 2662 add_to_sid_history(state, req->id1.idmap_id_u.sid.prefix, 2663 req->id1.idmap_id_u.sid.rid); 2664 2665 return (IDMAP_SUCCESS); 2666 } 2667 2668 idmap_retcode 2669 sid2pid_second_pass(lookup_state_t *state, sqlite *cache, sqlite *db, 2670 idmap_mapping *req, idmap_id_res *res) 2671 { 2672 idmap_retcode retcode; 2673 2674 /* Check if second pass is needed */ 2675 if (ARE_WE_DONE(req->direction)) 2676 return (res->retcode); 2677 2678 /* Get status from previous pass */ 2679 retcode = res->retcode; 2680 if (retcode != IDMAP_SUCCESS) 2681 goto out; 2682 2683 /* 2684 * If directory-based name mapping is enabled then the unixname 2685 * may already have been retrieved from the AD object (AD-mode or 2686 * mixed-mode) or from native LDAP object (nldap-mode) -- done. 2687 */ 2688 if (req->id2name != NULL) { 2689 assert(res->id.idtype != IDMAP_POSIXID); 2690 if (AD_MODE(res->id.idtype, state)) 2691 res->direction = IDMAP_DIRECTION_BI; 2692 else if (NLDAP_MODE(res->id.idtype, state)) 2693 res->direction = IDMAP_DIRECTION_BI; 2694 else if (MIXED_MODE(res->id.idtype, state)) 2695 res->direction = IDMAP_DIRECTION_W2U; 2696 2697 /* 2698 * Special case: (1) If the ad_unixuser_attr and 2699 * ad_unixgroup_attr uses the same attribute 2700 * name and (2) if this is a diagonal mapping 2701 * request and (3) the unixname has been retrieved 2702 * from the AD object -- then we ignore it and fallback 2703 * to name-based mapping rules and ephemeral mapping 2704 * 2705 * Example: 2706 * Properties: 2707 * config/ad_unixuser_attr = "unixname" 2708 * config/ad_unixgroup_attr = "unixname" 2709 * AD user object: 2710 * dn: cn=bob ... 2711 * objectclass: user 2712 * sam: bob 2713 * unixname: bob1234 2714 * AD group object: 2715 * dn: cn=winadmins ... 2716 * objectclass: group 2717 * sam: winadmins 2718 * unixname: unixadmins 2719 * 2720 * In this example whether "unixname" refers to a unixuser 2721 * or unixgroup depends upon the AD object. 2722 * 2723 * $idmap show -c winname:bob gid 2724 * AD lookup by "samAccountName=bob" for 2725 * "ad_unixgroup_attr (i.e unixname)" for directory-based 2726 * mapping would get "bob1234" which is not what we want. 2727 * Now why not getgrnam_r("bob1234") and use it if it 2728 * is indeed a unixgroup? That's because Unix can have 2729 * users and groups with the same name and we clearly 2730 * don't know the intention of the admin here. 2731 * Therefore we ignore this and fallback to name-based 2732 * mapping rules or ephemeral mapping. 2733 */ 2734 if ((AD_MODE(res->id.idtype, state) || 2735 MIXED_MODE(res->id.idtype, state)) && 2736 state->ad_unixuser_attr != NULL && 2737 state->ad_unixgroup_attr != NULL && 2738 strcasecmp(state->ad_unixuser_attr, 2739 state->ad_unixgroup_attr) == 0 && 2740 ((req->id1.idtype == IDMAP_USID && 2741 res->id.idtype == IDMAP_GID) || 2742 (req->id1.idtype == IDMAP_GSID && 2743 res->id.idtype == IDMAP_UID))) { 2744 free(req->id2name); 2745 req->id2name = NULL; 2746 res->id.idmap_id_u.uid = SENTINEL_PID; 2747 /* fallback */ 2748 } else { 2749 if (res->id.idmap_id_u.uid == SENTINEL_PID) 2750 retcode = ns_lookup_byname(req->id2name, 2751 NULL, &res->id); 2752 /* 2753 * We don't fallback to name-based mapping rules 2754 * or ephemeral mapping. 2755 */ 2756 goto out; 2757 } 2758 } 2759 2760 /* 2761 * If we don't have unixname then evaluate local name-based 2762 * mapping rules. 2763 */ 2764 retcode = name_based_mapping_sid2pid(db, req, res); 2765 if (retcode != IDMAP_ERR_NOTFOUND) 2766 goto out; 2767 2768 /* If not found, do ephemeral mapping */ 2769 retcode = dynamic_ephemeral_mapping(state, cache, req, res); 2770 2771 out: 2772 res->retcode = idmap_stat4prot(retcode); 2773 if (res->retcode != IDMAP_SUCCESS) { 2774 req->direction = _IDMAP_F_DONE; 2775 res->id.idmap_id_u.uid = UID_NOBODY; 2776 } 2777 if (!ARE_WE_DONE(req->direction)) 2778 state->sid2pid_done = FALSE; 2779 return (retcode); 2780 } 2781 2782 idmap_retcode 2783 update_cache_pid2sid(lookup_state_t *state, sqlite *cache, 2784 idmap_mapping *req, idmap_id_res *res) 2785 { 2786 char *sql = NULL; 2787 idmap_retcode retcode; 2788 2789 /* Check if we need to cache anything */ 2790 if (ARE_WE_DONE(req->direction)) 2791 return (IDMAP_SUCCESS); 2792 2793 /* We don't cache negative entries */ 2794 if (res->retcode != IDMAP_SUCCESS) 2795 return (IDMAP_SUCCESS); 2796 2797 assert(res->direction != IDMAP_DIRECTION_UNDEF); 2798 2799 /* 2800 * Using NULL for u2w instead of 0 so that our trigger allows 2801 * the same pid to be the destination in multiple entries 2802 */ 2803 sql = sqlite_mprintf("INSERT OR REPLACE into idmap_cache " 2804 "(sidprefix, rid, windomain, canon_winname, pid, unixname, " 2805 "is_user, is_wuser, expiration, w2u, u2w) " 2806 "VALUES(%Q, %u, %Q, %Q, %u, %Q, %d, %d, " 2807 "strftime('%%s','now') + 600, %q, 1); ", 2808 res->id.idmap_id_u.sid.prefix, res->id.idmap_id_u.sid.rid, 2809 req->id2domain, req->id2name, req->id1.idmap_id_u.uid, 2810 req->id1name, (req->id1.idtype == IDMAP_UID) ? 1 : 0, 2811 (res->id.idtype == IDMAP_USID) ? 1 : 0, 2812 (res->direction == 0) ? "1" : NULL); 2813 2814 if (sql == NULL) { 2815 retcode = IDMAP_ERR_INTERNAL; 2816 idmapdlog(LOG_ERR, "Out of memory"); 2817 goto out; 2818 } 2819 2820 retcode = sql_exec_no_cb(cache, sql); 2821 if (retcode != IDMAP_SUCCESS) 2822 goto out; 2823 2824 state->pid2sid_done = FALSE; 2825 sqlite_freemem(sql); 2826 sql = NULL; 2827 2828 /* Check if we need to update namecache */ 2829 if (req->direction & _IDMAP_F_DONT_UPDATE_NAMECACHE) 2830 goto out; 2831 2832 if (req->id2name == NULL) 2833 goto out; 2834 2835 sql = sqlite_mprintf("INSERT OR REPLACE into name_cache " 2836 "(sidprefix, rid, canon_name, domain, type, expiration) " 2837 "VALUES(%Q, %u, %Q, %Q, %d, strftime('%%s','now') + 3600); ", 2838 res->id.idmap_id_u.sid.prefix, res->id.idmap_id_u.sid.rid, 2839 req->id2name, req->id2domain, 2840 (res->id.idtype == IDMAP_USID) ? _IDMAP_T_USER : _IDMAP_T_GROUP); 2841 2842 if (sql == NULL) { 2843 retcode = IDMAP_ERR_INTERNAL; 2844 idmapdlog(LOG_ERR, "Out of memory"); 2845 goto out; 2846 } 2847 2848 retcode = sql_exec_no_cb(cache, sql); 2849 2850 out: 2851 if (sql != NULL) 2852 sqlite_freemem(sql); 2853 return (retcode); 2854 } 2855 2856 idmap_retcode 2857 update_cache_sid2pid(lookup_state_t *state, sqlite *cache, 2858 idmap_mapping *req, idmap_id_res *res) 2859 { 2860 char *sql = NULL; 2861 idmap_retcode retcode; 2862 int is_eph_user; 2863 2864 /* Check if we need to cache anything */ 2865 if (ARE_WE_DONE(req->direction)) 2866 return (IDMAP_SUCCESS); 2867 2868 /* We don't cache negative entries */ 2869 if (res->retcode != IDMAP_SUCCESS) 2870 return (IDMAP_SUCCESS); 2871 2872 if (req->direction & _IDMAP_F_EXP_EPH_UID) 2873 is_eph_user = 1; 2874 else if (req->direction & _IDMAP_F_EXP_EPH_GID) 2875 is_eph_user = 0; 2876 else 2877 is_eph_user = -1; 2878 2879 if (is_eph_user >= 0 && !IS_EPHEMERAL(res->id.idmap_id_u.uid)) { 2880 sql = sqlite_mprintf("UPDATE idmap_cache " 2881 "SET w2u = 0 WHERE " 2882 "sidprefix = %Q AND rid = %u AND w2u = 1 AND " 2883 "pid >= 2147483648 AND is_user = %d;", 2884 req->id1.idmap_id_u.sid.prefix, 2885 req->id1.idmap_id_u.sid.rid, 2886 is_eph_user); 2887 if (sql == NULL) { 2888 retcode = IDMAP_ERR_INTERNAL; 2889 idmapdlog(LOG_ERR, "Out of memory"); 2890 goto out; 2891 } 2892 2893 retcode = sql_exec_no_cb(cache, sql); 2894 if (retcode != IDMAP_SUCCESS) 2895 goto out; 2896 2897 sqlite_freemem(sql); 2898 sql = NULL; 2899 } 2900 2901 assert(res->direction != IDMAP_DIRECTION_UNDEF); 2902 2903 sql = sqlite_mprintf("INSERT OR REPLACE into idmap_cache " 2904 "(sidprefix, rid, windomain, canon_winname, pid, unixname, " 2905 "is_user, is_wuser, expiration, w2u, u2w) " 2906 "VALUES(%Q, %u, %Q, %Q, %u, %Q, %d, %d, " 2907 "strftime('%%s','now') + 600, 1, %q); ", 2908 req->id1.idmap_id_u.sid.prefix, req->id1.idmap_id_u.sid.rid, 2909 (req->id1domain != NULL) ? req->id1domain : "", req->id1name, 2910 res->id.idmap_id_u.uid, req->id2name, 2911 (res->id.idtype == IDMAP_UID) ? 1 : 0, 2912 (req->id1.idtype == IDMAP_USID) ? 1 : 0, 2913 (res->direction == 0) ? "1" : NULL); 2914 2915 if (sql == NULL) { 2916 retcode = IDMAP_ERR_INTERNAL; 2917 idmapdlog(LOG_ERR, "Out of memory"); 2918 goto out; 2919 } 2920 2921 retcode = sql_exec_no_cb(cache, sql); 2922 if (retcode != IDMAP_SUCCESS) 2923 goto out; 2924 2925 state->sid2pid_done = FALSE; 2926 sqlite_freemem(sql); 2927 sql = NULL; 2928 2929 /* Check if we need to update namecache */ 2930 if (req->direction & _IDMAP_F_DONT_UPDATE_NAMECACHE) 2931 goto out; 2932 2933 if (EMPTY_STRING(req->id1name)) 2934 goto out; 2935 2936 sql = sqlite_mprintf("INSERT OR REPLACE into name_cache " 2937 "(sidprefix, rid, canon_name, domain, type, expiration) " 2938 "VALUES(%Q, %u, %Q, %Q, %d, strftime('%%s','now') + 3600); ", 2939 req->id1.idmap_id_u.sid.prefix, req->id1.idmap_id_u.sid.rid, 2940 req->id1name, req->id1domain, 2941 (req->id1.idtype == IDMAP_USID) ? _IDMAP_T_USER : _IDMAP_T_GROUP); 2942 2943 if (sql == NULL) { 2944 retcode = IDMAP_ERR_INTERNAL; 2945 idmapdlog(LOG_ERR, "Out of memory"); 2946 goto out; 2947 } 2948 2949 retcode = sql_exec_no_cb(cache, sql); 2950 2951 out: 2952 if (sql != NULL) 2953 sqlite_freemem(sql); 2954 return (retcode); 2955 } 2956 2957 static 2958 idmap_retcode 2959 lookup_cache_pid2sid(sqlite *cache, idmap_mapping *req, idmap_id_res *res, 2960 int is_user, int getname) 2961 { 2962 char *end; 2963 char *sql = NULL; 2964 const char **values; 2965 sqlite_vm *vm = NULL; 2966 int ncol; 2967 idmap_retcode retcode = IDMAP_SUCCESS; 2968 time_t curtime; 2969 idmap_id_type idtype; 2970 2971 /* Current time */ 2972 errno = 0; 2973 if ((curtime = time(NULL)) == (time_t)-1) { 2974 idmapdlog(LOG_ERR, "Failed to get current time (%s)", 2975 strerror(errno)); 2976 retcode = IDMAP_ERR_INTERNAL; 2977 goto out; 2978 } 2979 2980 /* SQL to lookup the cache by pid or by unixname */ 2981 if (req->id1.idmap_id_u.uid != SENTINEL_PID) { 2982 sql = sqlite_mprintf("SELECT sidprefix, rid, canon_winname, " 2983 "windomain, w2u, is_wuser " 2984 "FROM idmap_cache WHERE " 2985 "pid = %u AND u2w = 1 AND is_user = %d AND " 2986 "(pid >= 2147483648 OR " 2987 "(expiration = 0 OR expiration ISNULL OR " 2988 "expiration > %d));", 2989 req->id1.idmap_id_u.uid, is_user, curtime); 2990 } else if (req->id1name != NULL) { 2991 sql = sqlite_mprintf("SELECT sidprefix, rid, canon_winname, " 2992 "windomain, w2u, is_wuser " 2993 "FROM idmap_cache WHERE " 2994 "unixname = %Q AND u2w = 1 AND is_user = %d AND " 2995 "(pid >= 2147483648 OR " 2996 "(expiration = 0 OR expiration ISNULL OR " 2997 "expiration > %d));", 2998 req->id1name, is_user, curtime); 2999 } 3000 3001 if (sql == NULL) { 3002 idmapdlog(LOG_ERR, "Out of memory"); 3003 retcode = IDMAP_ERR_MEMORY; 3004 goto out; 3005 } 3006 retcode = sql_compile_n_step_once(cache, sql, &vm, &ncol, 5, &values); 3007 sqlite_freemem(sql); 3008 3009 if (retcode == IDMAP_ERR_NOTFOUND) 3010 goto out; 3011 else if (retcode == IDMAP_SUCCESS) { 3012 /* sanity checks */ 3013 if (values[0] == NULL || values[1] == NULL) { 3014 retcode = IDMAP_ERR_CACHE; 3015 goto out; 3016 } 3017 3018 switch (res->id.idtype) { 3019 case IDMAP_SID: 3020 case IDMAP_USID: 3021 case IDMAP_GSID: 3022 idtype = strtol(values[5], &end, 10) == 1 3023 ? IDMAP_USID : IDMAP_GSID; 3024 3025 if (res->id.idtype == IDMAP_USID && 3026 idtype != IDMAP_USID) { 3027 retcode = IDMAP_ERR_NOTUSER; 3028 goto out; 3029 } else if (res->id.idtype == IDMAP_GSID && 3030 idtype != IDMAP_GSID) { 3031 retcode = IDMAP_ERR_NOTGROUP; 3032 goto out; 3033 } 3034 res->id.idtype = idtype; 3035 3036 res->id.idmap_id_u.sid.rid = 3037 strtoul(values[1], &end, 10); 3038 res->id.idmap_id_u.sid.prefix = strdup(values[0]); 3039 if (res->id.idmap_id_u.sid.prefix == NULL) { 3040 idmapdlog(LOG_ERR, "Out of memory"); 3041 retcode = IDMAP_ERR_MEMORY; 3042 goto out; 3043 } 3044 3045 if (values[4] != NULL) 3046 res->direction = 3047 (strtol(values[4], &end, 10) == 0)? 3048 IDMAP_DIRECTION_U2W:IDMAP_DIRECTION_BI; 3049 else 3050 res->direction = IDMAP_DIRECTION_U2W; 3051 3052 if (getname == 0 || values[2] == NULL) 3053 break; 3054 req->id2name = strdup(values[2]); 3055 if (req->id2name == NULL) { 3056 idmapdlog(LOG_ERR, "Out of memory"); 3057 retcode = IDMAP_ERR_MEMORY; 3058 goto out; 3059 } 3060 3061 if (values[3] == NULL) 3062 break; 3063 req->id2domain = strdup(values[3]); 3064 if (req->id2domain == NULL) { 3065 idmapdlog(LOG_ERR, "Out of memory"); 3066 retcode = IDMAP_ERR_MEMORY; 3067 goto out; 3068 } 3069 3070 break; 3071 default: 3072 retcode = IDMAP_ERR_NOTSUPPORTED; 3073 break; 3074 } 3075 } 3076 3077 out: 3078 if (vm != NULL) 3079 (void) sqlite_finalize(vm, NULL); 3080 return (retcode); 3081 } 3082 3083 static 3084 idmap_retcode 3085 lookup_cache_name2sid(sqlite *cache, const char *name, const char *domain, 3086 char **canonname, char **sidprefix, idmap_rid_t *rid, int *type) 3087 { 3088 char *end, *lower_name; 3089 char *sql = NULL; 3090 const char **values; 3091 sqlite_vm *vm = NULL; 3092 int ncol; 3093 time_t curtime; 3094 idmap_retcode retcode = IDMAP_SUCCESS; 3095 3096 /* Get current time */ 3097 errno = 0; 3098 if ((curtime = time(NULL)) == (time_t)-1) { 3099 idmapdlog(LOG_ERR, "Failed to get current time (%s)", 3100 strerror(errno)); 3101 retcode = IDMAP_ERR_INTERNAL; 3102 goto out; 3103 } 3104 3105 /* SQL to lookup the cache */ 3106 if ((lower_name = tolower_u8(name)) == NULL) 3107 lower_name = (char *)name; 3108 sql = sqlite_mprintf("SELECT sidprefix, rid, type, canon_name " 3109 "FROM name_cache WHERE name = %Q AND domain = %Q AND " 3110 "(expiration = 0 OR expiration ISNULL OR " 3111 "expiration > %d);", lower_name, domain, curtime); 3112 if (lower_name != name) 3113 free(lower_name); 3114 if (sql == NULL) { 3115 idmapdlog(LOG_ERR, "Out of memory"); 3116 retcode = IDMAP_ERR_MEMORY; 3117 goto out; 3118 } 3119 retcode = sql_compile_n_step_once(cache, sql, &vm, &ncol, 4, &values); 3120 sqlite_freemem(sql); 3121 3122 if (retcode == IDMAP_SUCCESS) { 3123 if (type != NULL) { 3124 if (values[2] == NULL) { 3125 retcode = IDMAP_ERR_CACHE; 3126 goto out; 3127 } 3128 *type = strtol(values[2], &end, 10); 3129 } 3130 3131 if (values[0] == NULL || values[1] == NULL) { 3132 retcode = IDMAP_ERR_CACHE; 3133 goto out; 3134 } 3135 3136 if (canonname != NULL) { 3137 assert(values[3] != NULL); 3138 if ((*canonname = strdup(values[3])) == NULL) { 3139 idmapdlog(LOG_ERR, "Out of memory"); 3140 retcode = IDMAP_ERR_MEMORY; 3141 goto out; 3142 } 3143 } 3144 3145 if ((*sidprefix = strdup(values[0])) == NULL) { 3146 idmapdlog(LOG_ERR, "Out of memory"); 3147 retcode = IDMAP_ERR_MEMORY; 3148 if (canonname != NULL) { 3149 free(*canonname); 3150 *canonname = NULL; 3151 } 3152 goto out; 3153 } 3154 *rid = strtoul(values[1], &end, 10); 3155 } 3156 3157 out: 3158 if (vm != NULL) 3159 (void) sqlite_finalize(vm, NULL); 3160 return (retcode); 3161 } 3162 3163 static 3164 idmap_retcode 3165 ad_lookup_by_winname(lookup_state_t *state, 3166 const char *name, const char *domain, int eunixtype, 3167 char **canonname, char **sidprefix, 3168 idmap_rid_t *rid, int *wintype, char **unixname) 3169 { 3170 int retries = 0; 3171 idmap_query_state_t *qs = NULL; 3172 idmap_retcode rc, retcode; 3173 3174 retry: 3175 retcode = idmap_lookup_batch_start(_idmapdstate.ad, 1, &qs); 3176 if (retcode != IDMAP_SUCCESS) { 3177 degrade_svc(); 3178 idmapdlog(LOG_ERR, 3179 "Failed to create request for AD lookup by winname"); 3180 return (retcode); 3181 } 3182 3183 restore_svc(); 3184 3185 if (state != NULL) 3186 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 3187 state->ad_unixgroup_attr); 3188 3189 retcode = idmap_name2sid_batch_add1(qs, name, domain, eunixtype, 3190 canonname, sidprefix, rid, wintype, unixname, &rc); 3191 3192 if (retcode != IDMAP_SUCCESS) 3193 idmap_lookup_release_batch(&qs); 3194 else 3195 retcode = idmap_lookup_batch_end(&qs, NULL); 3196 3197 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 3198 goto retry; 3199 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 3200 degrade_svc(); 3201 3202 if (retcode != IDMAP_SUCCESS) { 3203 idmapdlog(LOG_NOTICE, "AD lookup by winname failed"); 3204 return (retcode); 3205 } 3206 return (rc); 3207 } 3208 3209 static 3210 idmap_retcode 3211 lookup_name2sid(sqlite *cache, const char *name, const char *domain, 3212 int *is_wuser, char **canonname, char **sidprefix, 3213 idmap_rid_t *rid, idmap_mapping *req) 3214 { 3215 int type; 3216 idmap_retcode retcode; 3217 3218 *sidprefix = NULL; 3219 if (canonname != NULL) 3220 *canonname = NULL; 3221 3222 /* Lookup well-known SIDs table */ 3223 retcode = lookup_wksids_name2sid(name, canonname, sidprefix, rid, 3224 &type); 3225 if (retcode == IDMAP_SUCCESS) { 3226 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 3227 goto out; 3228 } else if (retcode != IDMAP_ERR_NOTFOUND) { 3229 return (retcode); 3230 } 3231 3232 /* Lookup cache */ 3233 retcode = lookup_cache_name2sid(cache, name, domain, canonname, 3234 sidprefix, rid, &type); 3235 if (retcode == IDMAP_SUCCESS) { 3236 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 3237 goto out; 3238 } else if (retcode != IDMAP_ERR_NOTFOUND) { 3239 return (retcode); 3240 } 3241 3242 /* Lookup AD */ 3243 retcode = ad_lookup_by_winname(NULL, name, domain, _IDMAP_T_UNDEF, 3244 canonname, sidprefix, rid, &type, NULL); 3245 if (retcode != IDMAP_SUCCESS) 3246 return (retcode); 3247 /* Don't need to set req->direction |= _IDMAP_F_LOOKUP_AD; */ 3248 3249 out: 3250 /* 3251 * Entry found (cache or Windows lookup) 3252 * is_wuser is both input as well as output parameter 3253 */ 3254 if (*is_wuser == 1 && type != _IDMAP_T_USER) 3255 retcode = IDMAP_ERR_NOTUSER; 3256 else if (*is_wuser == 0 && type != _IDMAP_T_GROUP) 3257 retcode = IDMAP_ERR_NOTGROUP; 3258 else if (*is_wuser == -1) { 3259 /* Caller wants to know if its user or group */ 3260 if (type == _IDMAP_T_USER) 3261 *is_wuser = 1; 3262 else if (type == _IDMAP_T_GROUP) 3263 *is_wuser = 0; 3264 else 3265 retcode = IDMAP_ERR_SID; 3266 } 3267 3268 if (retcode != IDMAP_SUCCESS) { 3269 free(*sidprefix); 3270 *sidprefix = NULL; 3271 if (canonname != NULL) { 3272 free(*canonname); 3273 *canonname = NULL; 3274 } 3275 } 3276 return (retcode); 3277 } 3278 3279 static 3280 idmap_retcode 3281 name_based_mapping_pid2sid(sqlite *db, sqlite *cache, const char *unixname, 3282 int is_user, idmap_mapping *req, idmap_id_res *res) 3283 { 3284 const char *winname, *windomain; 3285 char *canonname; 3286 char *default_domain = NULL; 3287 char *sql = NULL, *errmsg = NULL; 3288 idmap_retcode retcode; 3289 char *end; 3290 const char **values; 3291 sqlite_vm *vm = NULL; 3292 int ncol, r, nrow; 3293 int is_wuser; 3294 const char *me = "name_based_mapping_pid2sid"; 3295 3296 assert(unixname != NULL); /* We have unixname */ 3297 assert(req->id2name == NULL); /* We don't have winname */ 3298 assert(res->id.idmap_id_u.sid.prefix == NULL); /* No SID either */ 3299 3300 RDLOCK_CONFIG(); 3301 if (_idmapdstate.cfg->pgcfg.default_domain != NULL) { 3302 default_domain = 3303 strdup(_idmapdstate.cfg->pgcfg.default_domain); 3304 if (default_domain == NULL) { 3305 UNLOCK_CONFIG(); 3306 idmapdlog(LOG_ERR, "Out of memory"); 3307 retcode = IDMAP_ERR_MEMORY; 3308 goto out; 3309 } 3310 } 3311 UNLOCK_CONFIG(); 3312 3313 sql = sqlite_mprintf( 3314 "SELECT winname_display, windomain, w2u_order FROM namerules WHERE " 3315 "u2w_order > 0 AND is_user = %d AND " 3316 "(unixname = %Q OR unixname = '*') " 3317 "ORDER BY u2w_order ASC;", is_user, unixname); 3318 if (sql == NULL) { 3319 idmapdlog(LOG_ERR, "Out of memory"); 3320 retcode = IDMAP_ERR_MEMORY; 3321 goto out; 3322 } 3323 3324 if (sqlite_compile(db, sql, NULL, &vm, &errmsg) != SQLITE_OK) { 3325 retcode = IDMAP_ERR_INTERNAL; 3326 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 3327 CHECK_NULL(errmsg)); 3328 sqlite_freemem(errmsg); 3329 goto out; 3330 } 3331 3332 for (nrow = 0; ; ) { 3333 r = sqlite_step(vm, &ncol, &values, NULL); 3334 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 3335 if (r == SQLITE_ROW) { 3336 nrow++; 3337 if (ncol < 3) { 3338 retcode = IDMAP_ERR_INTERNAL; 3339 goto out; 3340 } 3341 if (values[0] == NULL) { 3342 /* values [1] and [2] can be null */ 3343 retcode = IDMAP_ERR_INTERNAL; 3344 goto out; 3345 } 3346 if (EMPTY_NAME(values[0])) { 3347 retcode = IDMAP_ERR_NOMAPPING; 3348 goto out; 3349 } 3350 3351 if (values[0][0] == '*') { 3352 if (nrow > 1) { 3353 /* 3354 * There were non-wildcard rules where 3355 * windows identity doesn't exist 3356 */ 3357 retcode = IDMAP_ERR_NOMAPPING; 3358 goto out; 3359 } 3360 winname = unixname; 3361 } else { 3362 winname = values[0]; 3363 } 3364 3365 if (values[1] != NULL) 3366 windomain = values[1]; 3367 else if (default_domain != NULL) 3368 windomain = default_domain; 3369 else { 3370 idmapdlog(LOG_ERR, "%s: no domain", me); 3371 retcode = IDMAP_ERR_DOMAIN_NOTFOUND; 3372 goto out; 3373 } 3374 /* Lookup winname@domain to sid */ 3375 3376 is_wuser = res->id.idtype == IDMAP_USID ? 1 3377 : res->id.idtype == IDMAP_GSID ? 0 3378 : -1; 3379 3380 retcode = lookup_name2sid(cache, winname, windomain, 3381 &is_wuser, &canonname, 3382 &res->id.idmap_id_u.sid.prefix, 3383 &res->id.idmap_id_u.sid.rid, req); 3384 3385 if (retcode == IDMAP_ERR_NOTFOUND) { 3386 continue; 3387 } 3388 3389 goto out; 3390 } else if (r == SQLITE_DONE) { 3391 retcode = IDMAP_ERR_NOTFOUND; 3392 goto out; 3393 } else { 3394 (void) sqlite_finalize(vm, &errmsg); 3395 vm = NULL; 3396 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 3397 CHECK_NULL(errmsg)); 3398 sqlite_freemem(errmsg); 3399 retcode = IDMAP_ERR_INTERNAL; 3400 goto out; 3401 } 3402 } 3403 3404 out: 3405 if (sql != NULL) 3406 sqlite_freemem(sql); 3407 if (retcode == IDMAP_SUCCESS) { 3408 res->id.idtype = is_wuser ? IDMAP_USID : IDMAP_GSID; 3409 3410 if (values[2] != NULL) 3411 res->direction = 3412 (strtol(values[2], &end, 10) == 0)? 3413 IDMAP_DIRECTION_U2W:IDMAP_DIRECTION_BI; 3414 else 3415 res->direction = IDMAP_DIRECTION_U2W; 3416 3417 req->id2name = canonname; 3418 if (req->id2name != NULL) { 3419 if (windomain == default_domain) { 3420 req->id2domain = (char *)windomain; 3421 default_domain = NULL; 3422 } else { 3423 req->id2domain = strdup(windomain); 3424 } 3425 } 3426 } 3427 if (vm != NULL) 3428 (void) sqlite_finalize(vm, NULL); 3429 if (default_domain != NULL) 3430 free(default_domain); 3431 return (retcode); 3432 } 3433 3434 /* 3435 * Convention when processing unix2win requests: 3436 * 3437 * Unix identity: 3438 * req->id1name = 3439 * unixname if given otherwise unixname found will be placed 3440 * here. 3441 * req->id1domain = 3442 * NOT USED 3443 * req->id1.idtype = 3444 * Given type (IDMAP_UID or IDMAP_GID) 3445 * req->id1..[uid or gid] = 3446 * UID/GID if given otherwise UID/GID found will be placed here. 3447 * 3448 * Windows identity: 3449 * req->id2name = 3450 * winname found will be placed here. 3451 * req->id2domain = 3452 * windomain found will be placed here. 3453 * res->id.idtype = 3454 * Target type initialized from req->id2.idtype. If 3455 * it is IDMAP_SID then actual type (IDMAP_USID/GSID) found 3456 * will be placed here. 3457 * req->id..sid.[prefix, rid] = 3458 * SID found will be placed here. 3459 * 3460 * Others: 3461 * res->retcode = 3462 * Return status for this request will be placed here. 3463 * res->direction = 3464 * Direction found will be placed here. Direction 3465 * meaning whether the resultant mapping is valid 3466 * only from unix2win or bi-directional. 3467 * req->direction = 3468 * INTERNAL USE. Used by idmapd to set various 3469 * flags (_IDMAP_F_xxxx) to aid in processing 3470 * of the request. 3471 * req->id2.idtype = 3472 * INTERNAL USE. Initially this is the requested target 3473 * type and is used to initialize res->id.idtype. 3474 * ad_lookup_batch() uses this field temporarily to store 3475 * sid_type obtained by the batched AD lookups and after 3476 * use resets it to IDMAP_NONE to prevent xdr from 3477 * mis-interpreting the contents of req->id2. 3478 * req->id2..[uid or gid or sid] = 3479 * NOT USED 3480 */ 3481 3482 /* 3483 * This function does the following: 3484 * 1. Lookup well-known SIDs table. 3485 * 2. Lookup cache. 3486 * 3. Check if the client does not want new mapping to be allocated 3487 * in which case this pass is the final pass. 3488 * 4. Set AD/NLDAP lookup flags if it determines that the next stage needs 3489 * to do AD/NLDAP lookup. 3490 */ 3491 idmap_retcode 3492 pid2sid_first_pass(lookup_state_t *state, sqlite *cache, 3493 idmap_mapping *req, idmap_id_res *res, int is_user, 3494 int getname) 3495 { 3496 idmap_retcode retcode; 3497 bool_t gen_localsid_on_err = FALSE; 3498 3499 /* Initialize result */ 3500 res->id.idtype = req->id2.idtype; 3501 res->direction = IDMAP_DIRECTION_UNDEF; 3502 3503 if (req->id2.idmap_id_u.sid.prefix != NULL) { 3504 /* sanitize sidprefix */ 3505 free(req->id2.idmap_id_u.sid.prefix); 3506 req->id2.idmap_id_u.sid.prefix = NULL; 3507 } 3508 3509 /* Lookup well-known SIDs table */ 3510 retcode = lookup_wksids_pid2sid(req, res, is_user); 3511 if (retcode != IDMAP_ERR_NOTFOUND) 3512 goto out; 3513 3514 /* Lookup cache */ 3515 retcode = lookup_cache_pid2sid(cache, req, res, is_user, getname); 3516 if (retcode != IDMAP_ERR_NOTFOUND) 3517 goto out; 3518 3519 /* Ephemeral ids cannot be allocated during pid2sid */ 3520 if (IS_EPHEMERAL(req->id1.idmap_id_u.uid)) { 3521 retcode = IDMAP_ERR_NOMAPPING; 3522 goto out; 3523 } 3524 3525 if (DO_NOT_ALLOC_NEW_ID_MAPPING(req) || AVOID_NAMESERVICE(req)) { 3526 gen_localsid_on_err = TRUE; 3527 retcode = IDMAP_ERR_NOMAPPING; 3528 goto out; 3529 } 3530 3531 /* Set flags for the next stage */ 3532 if (AD_MODE(req->id1.idtype, state)) { 3533 /* 3534 * If AD-based name mapping is enabled then the next stage 3535 * will need to lookup AD using unixname to get the 3536 * corresponding winname. 3537 */ 3538 if (req->id1name == NULL) { 3539 /* Get unixname if only pid is given. */ 3540 retcode = ns_lookup_bypid(req->id1.idmap_id_u.uid, 3541 is_user, &req->id1name); 3542 if (retcode != IDMAP_SUCCESS) 3543 goto out; 3544 } 3545 req->direction |= _IDMAP_F_LOOKUP_AD; 3546 state->ad_nqueries++; 3547 } else if (NLDAP_OR_MIXED_MODE(req->id1.idtype, state)) { 3548 /* 3549 * If native LDAP or mixed mode is enabled for name mapping 3550 * then the next stage will need to lookup native LDAP using 3551 * unixname/pid to get the corresponding winname. 3552 */ 3553 req->direction |= _IDMAP_F_LOOKUP_NLDAP; 3554 state->nldap_nqueries++; 3555 } 3556 3557 /* 3558 * Failed to find non-expired entry in cache. Set the flag to 3559 * indicate that we are not done yet. 3560 */ 3561 state->pid2sid_done = FALSE; 3562 req->direction |= _IDMAP_F_NOTDONE; 3563 retcode = IDMAP_SUCCESS; 3564 3565 out: 3566 res->retcode = idmap_stat4prot(retcode); 3567 if (ARE_WE_DONE(req->direction) && res->retcode != IDMAP_SUCCESS) 3568 if (gen_localsid_on_err == TRUE) 3569 (void) generate_localsid(req, res, is_user); 3570 return (retcode); 3571 } 3572 3573 idmap_retcode 3574 pid2sid_second_pass(lookup_state_t *state, sqlite *cache, sqlite *db, 3575 idmap_mapping *req, idmap_id_res *res, int is_user) 3576 { 3577 bool_t gen_localsid_on_err = TRUE; 3578 idmap_retcode retcode = IDMAP_SUCCESS; 3579 3580 /* Check if second pass is needed */ 3581 if (ARE_WE_DONE(req->direction)) 3582 return (res->retcode); 3583 3584 /* Get status from previous pass */ 3585 retcode = res->retcode; 3586 if (retcode != IDMAP_SUCCESS) 3587 goto out; 3588 3589 /* 3590 * If directory-based name mapping is enabled then the winname 3591 * may already have been retrieved from the AD object (AD-mode) 3592 * or from native LDAP object (nldap-mode or mixed-mode) -- done. 3593 */ 3594 if (res->id.idmap_id_u.sid.prefix != NULL || req->id2name != NULL) { 3595 if (AD_MODE(req->id1.idtype, state)) 3596 res->direction = IDMAP_DIRECTION_BI; 3597 else if (NLDAP_MODE(req->id1.idtype, state)) 3598 res->direction = IDMAP_DIRECTION_BI; 3599 else if (MIXED_MODE(req->id1.idtype, state)) 3600 res->direction = IDMAP_DIRECTION_W2U; 3601 goto out; 3602 } 3603 3604 if (req->id1name == NULL) { 3605 /* Get unixname from name service */ 3606 retcode = ns_lookup_bypid(req->id1.idmap_id_u.uid, is_user, 3607 &req->id1name); 3608 if (retcode != IDMAP_SUCCESS) 3609 goto out; 3610 } else if (req->id1.idmap_id_u.uid == SENTINEL_PID) { 3611 /* Get pid from name service */ 3612 retcode = ns_lookup_byname(req->id1name, NULL, &req->id1); 3613 if (retcode != IDMAP_SUCCESS) { 3614 gen_localsid_on_err = FALSE; 3615 goto out; 3616 } 3617 } 3618 3619 /* Use unixname to evaluate local name-based mapping rules */ 3620 retcode = name_based_mapping_pid2sid(db, cache, req->id1name, is_user, 3621 req, res); 3622 if (retcode == IDMAP_ERR_NOTFOUND) { 3623 retcode = generate_localsid(req, res, is_user); 3624 gen_localsid_on_err = FALSE; 3625 } 3626 3627 out: 3628 res->retcode = idmap_stat4prot(retcode); 3629 if (res->retcode != IDMAP_SUCCESS) { 3630 req->direction = _IDMAP_F_DONE; 3631 if (gen_localsid_on_err == TRUE) 3632 (void) generate_localsid(req, res, is_user); 3633 } 3634 if (!ARE_WE_DONE(req->direction)) 3635 state->pid2sid_done = FALSE; 3636 return (retcode); 3637 } 3638 3639 static 3640 idmap_retcode 3641 ad_lookup_by_sid(lookup_state_t *state, 3642 const char *sidprefix, idmap_rid_t rid, int eunixtype, 3643 char **name, char **domain, int *type, char **unixname) 3644 { 3645 int retries = 0; 3646 idmap_query_state_t *qs = NULL; 3647 idmap_retcode rc, retcode; 3648 3649 retry: 3650 retcode = idmap_lookup_batch_start(_idmapdstate.ad, 1, &qs); 3651 if (retcode != IDMAP_SUCCESS) { 3652 degrade_svc(); 3653 idmapdlog(LOG_ERR, 3654 "Failed to create request for AD lookup by SID"); 3655 return (retcode); 3656 } 3657 3658 restore_svc(); 3659 3660 if (state != NULL) 3661 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 3662 state->ad_unixgroup_attr); 3663 3664 retcode = idmap_sid2name_batch_add1(qs, sidprefix, &rid, eunixtype, 3665 name, domain, type, unixname, &rc); 3666 3667 if (retcode != IDMAP_SUCCESS) 3668 idmap_lookup_release_batch(&qs); 3669 else 3670 retcode = idmap_lookup_batch_end(&qs, NULL); 3671 3672 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 3673 goto retry; 3674 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 3675 degrade_svc(); 3676 3677 if (retcode != IDMAP_SUCCESS) { 3678 idmapdlog(LOG_NOTICE, "AD lookup by SID failed"); 3679 return (retcode); 3680 } 3681 return (rc); 3682 } 3683 3684 static 3685 int 3686 copy_mapping_request(idmap_mapping *mapping, idmap_mapping *request) 3687 { 3688 (void) memset(mapping, 0, sizeof (*mapping)); 3689 3690 mapping->flag = request->flag; 3691 mapping->direction = _IDMAP_F_DONE; 3692 mapping->id2.idtype = request->id2.idtype; 3693 3694 mapping->id1.idtype = request->id1.idtype; 3695 if (IS_REQUEST_SID(*request, 1)) { 3696 mapping->id1.idmap_id_u.sid.rid = 3697 request->id1.idmap_id_u.sid.rid; 3698 if (!EMPTY_STRING(request->id1.idmap_id_u.sid.prefix)) { 3699 mapping->id1.idmap_id_u.sid.prefix = 3700 strdup(request->id1.idmap_id_u.sid.prefix); 3701 if (mapping->id1.idmap_id_u.sid.prefix == NULL) 3702 goto errout; 3703 } 3704 } else { 3705 mapping->id1.idmap_id_u.uid = request->id1.idmap_id_u.uid; 3706 } 3707 3708 if (!EMPTY_STRING(request->id1domain)) { 3709 mapping->id1domain = strdup(request->id1domain); 3710 if (mapping->id1domain == NULL) 3711 goto errout; 3712 } 3713 3714 if (!EMPTY_STRING(request->id1name)) { 3715 mapping->id1name = strdup(request->id1name); 3716 if (mapping->id1name == NULL) 3717 goto errout; 3718 } 3719 3720 /* We don't need the rest of the request i.e request->id2 */ 3721 return (0); 3722 3723 errout: 3724 if (mapping->id1.idmap_id_u.sid.prefix != NULL) 3725 free(mapping->id1.idmap_id_u.sid.prefix); 3726 if (mapping->id1domain != NULL) 3727 free(mapping->id1domain); 3728 if (mapping->id1name != NULL) 3729 free(mapping->id1name); 3730 3731 (void) memset(mapping, 0, sizeof (*mapping)); 3732 return (-1); 3733 } 3734 3735 3736 idmap_retcode 3737 get_w2u_mapping(sqlite *cache, sqlite *db, idmap_mapping *request, 3738 idmap_mapping *mapping) 3739 { 3740 idmap_id_res idres; 3741 lookup_state_t state; 3742 char *cp; 3743 idmap_retcode retcode; 3744 const char *winname, *windomain; 3745 3746 (void) memset(&idres, 0, sizeof (idres)); 3747 (void) memset(&state, 0, sizeof (state)); 3748 3749 /* Get directory-based name mapping info */ 3750 retcode = get_ds_namemap_type(&state); 3751 if (retcode != IDMAP_SUCCESS) 3752 goto out; 3753 3754 /* 3755 * Copy data from "request" to "mapping". Note that 3756 * empty strings are not copied from "request" to 3757 * "mapping" and therefore the coresponding strings in 3758 * "mapping" will be NULL. This eliminates having to 3759 * check for empty strings henceforth. 3760 */ 3761 if (copy_mapping_request(mapping, request) < 0) { 3762 retcode = IDMAP_ERR_MEMORY; 3763 goto out; 3764 } 3765 3766 winname = mapping->id1name; 3767 windomain = mapping->id1domain; 3768 3769 if (winname == NULL && windomain != NULL) { 3770 retcode = IDMAP_ERR_ARG; 3771 goto out; 3772 } 3773 3774 /* Need atleast winname or sid to proceed */ 3775 if (winname == NULL && mapping->id1.idmap_id_u.sid.prefix == NULL) { 3776 retcode = IDMAP_ERR_ARG; 3777 goto out; 3778 } 3779 3780 /* 3781 * If domainname is not given but we have a fully qualified 3782 * winname then extract the domainname from the winname, 3783 * otherwise use the default_domain from the config 3784 */ 3785 if (winname != NULL && windomain == NULL) { 3786 retcode = IDMAP_SUCCESS; 3787 if ((cp = strchr(winname, '@')) != NULL) { 3788 *cp = '\0'; 3789 mapping->id1domain = strdup(cp + 1); 3790 if (mapping->id1domain == NULL) 3791 retcode = IDMAP_ERR_MEMORY; 3792 } else if (lookup_wksids_name2sid(winname, NULL, NULL, NULL, 3793 NULL) != IDMAP_SUCCESS) { 3794 /* well-known SIDs don't need domain */ 3795 RDLOCK_CONFIG(); 3796 if (_idmapdstate.cfg->pgcfg.default_domain != NULL) { 3797 mapping->id1domain = 3798 strdup(_idmapdstate.cfg-> 3799 pgcfg.default_domain); 3800 if (mapping->id1domain == NULL) 3801 retcode = IDMAP_ERR_MEMORY; 3802 } else { 3803 retcode = IDMAP_ERR_DOMAIN_NOTFOUND; 3804 } 3805 UNLOCK_CONFIG(); 3806 } 3807 if (retcode != IDMAP_SUCCESS) 3808 goto out; 3809 } 3810 3811 /* 3812 * First pass looks up the well-known SIDs table and cache 3813 * and handles localSIDs 3814 */ 3815 state.sid2pid_done = TRUE; 3816 retcode = sid2pid_first_pass(&state, cache, mapping, &idres); 3817 if (IDMAP_ERROR(retcode) || state.sid2pid_done == TRUE) 3818 goto out; 3819 3820 /* AD lookup by winname or by sid */ 3821 if (state.ad_nqueries > 0) { 3822 retcode = ad_lookup(&state, mapping, &idres, 1, 1, 0); 3823 if (IDMAP_ERROR(retcode)) 3824 goto out; 3825 } 3826 3827 /* 3828 * If nldap-based name mapping is enabled then lookup native LDAP 3829 * directory service by winname to get pid and unixname. Ignore 3830 * non-fatal errors in which case we simply fallback to evaluating 3831 * local name-based mapping rules. 3832 */ 3833 if (mapping->id1name != NULL && NLDAP_MODE(idres.id.idtype, (&state))) { 3834 retcode = nldap_lookup(mapping, &idres, 1, 1); 3835 if (IDMAP_FATAL_ERROR(retcode)) 3836 goto out; 3837 idres.retcode = IDMAP_SUCCESS; 3838 } 3839 3840 /* Next pass performs name-based mapping and ephemeral mapping. */ 3841 state.sid2pid_done = TRUE; 3842 retcode = sid2pid_second_pass(&state, cache, db, mapping, &idres); 3843 if (IDMAP_ERROR(retcode) || state.sid2pid_done == TRUE) 3844 goto out; 3845 3846 /* Update cache */ 3847 (void) update_cache_sid2pid(&state, cache, mapping, &idres); 3848 3849 out: 3850 /* 3851 * Note that "mapping" is returned to the client. Therefore 3852 * copy whatever we have in "idres" to mapping->id2 and 3853 * free idres. 3854 */ 3855 mapping->direction = idres.direction; 3856 mapping->id2 = idres.id; 3857 (void) memset(&idres, 0, sizeof (idres)); 3858 if (retcode != IDMAP_SUCCESS) 3859 mapping->id2.idmap_id_u.uid = UID_NOBODY; 3860 xdr_free(xdr_idmap_id_res, (caddr_t)&idres); 3861 cleanup_lookup_state(&state); 3862 return (retcode); 3863 } 3864 3865 idmap_retcode 3866 get_u2w_mapping(sqlite *cache, sqlite *db, idmap_mapping *request, 3867 idmap_mapping *mapping, int is_user) 3868 { 3869 idmap_id_res idres; 3870 lookup_state_t state; 3871 idmap_retcode retcode; 3872 char *canonname; 3873 int is_wuser; 3874 3875 /* 3876 * In order to re-use the pid2sid code, we convert 3877 * our input data into structs that are expected by 3878 * pid2sid_first_pass. 3879 */ 3880 3881 (void) memset(&idres, 0, sizeof (idres)); 3882 (void) memset(&state, 0, sizeof (state)); 3883 3884 /* Get directory-based name mapping info */ 3885 retcode = get_ds_namemap_type(&state); 3886 if (retcode != IDMAP_SUCCESS) 3887 goto out; 3888 3889 /* 3890 * Copy data from "request" to "mapping". Note that 3891 * empty strings are not copied from "request" to 3892 * "mapping" and therefore the coresponding strings in 3893 * "mapping" will be NULL. This eliminates having to 3894 * check for empty strings henceforth. 3895 */ 3896 if (copy_mapping_request(mapping, request) < 0) { 3897 retcode = IDMAP_ERR_MEMORY; 3898 goto out; 3899 } 3900 3901 /* 3902 * For unix to windows mapping request, we need atleast a 3903 * unixname or uid/gid to proceed 3904 */ 3905 if (mapping->id1name == NULL && 3906 mapping->id1.idmap_id_u.uid == SENTINEL_PID) { 3907 retcode = IDMAP_ERR_ARG; 3908 goto out; 3909 } 3910 3911 /* First pass looks up cache and well-known SIDs */ 3912 state.pid2sid_done = TRUE; 3913 retcode = pid2sid_first_pass(&state, cache, mapping, &idres, 3914 is_user, 1); 3915 if (IDMAP_ERROR(retcode) || state.pid2sid_done == TRUE) 3916 goto out; 3917 3918 if (state.nldap_nqueries > 0) { 3919 /* 3920 * This means directory-based name mapping (nldap or mixed 3921 * mode) is enabled. Lookup native LDAP directory service 3922 * by unixname or pid to get the winname. Ignore non-fatal 3923 * errors in which case we simply fallback to local name 3924 * based mapping rules. 3925 */ 3926 retcode = nldap_lookup(mapping, &idres, 0, 0); 3927 if (IDMAP_FATAL_ERROR(retcode)) 3928 goto out; 3929 idres.retcode = IDMAP_SUCCESS; 3930 3931 /* 3932 * If we've winname then get SID. We use lookup_name2sid() 3933 * instead of ad_lookup() in order to first resolve name2sid 3934 * using well-known SIDs table and name_cache before trying 3935 * AD. 3936 */ 3937 if (mapping->id2name != NULL) { 3938 canonname = NULL; 3939 is_wuser = -1; 3940 retcode = lookup_name2sid(cache, mapping->id2name, 3941 mapping->id2domain, &is_wuser, &canonname, 3942 &idres.id.idmap_id_u.sid.prefix, 3943 &idres.id.idmap_id_u.sid.rid, mapping); 3944 if (canonname != NULL) { 3945 free(mapping->id2name); 3946 mapping->id2name = canonname; 3947 } 3948 if (retcode == IDMAP_SUCCESS) 3949 idres.id.idtype = is_wuser ? IDMAP_USID : 3950 IDMAP_GSID; 3951 idres.retcode = retcode; 3952 } 3953 } else if (state.ad_nqueries > 0) { 3954 /* 3955 * This means AD-based name mapping is enabled. 3956 * Lookup AD by unixname to get winname and sid. 3957 * Ignore non-fatal errors in which case we simply fallback 3958 * to local name based mapping rules. 3959 */ 3960 retcode = ad_lookup(&state, mapping, &idres, 0, 0, 1); 3961 if (IDMAP_FATAL_ERROR(retcode)) 3962 goto out; 3963 idres.retcode = IDMAP_SUCCESS; 3964 } 3965 3966 /* 3967 * Next pass processes the result of the preceding passes/lookups. 3968 * It returns if there's nothing more to be done otherwise it 3969 * evaluates local name-based mapping rules 3970 */ 3971 state.pid2sid_done = TRUE; 3972 retcode = pid2sid_second_pass(&state, cache, db, mapping, &idres, 3973 is_user); 3974 if (IDMAP_ERROR(retcode) || state.pid2sid_done == TRUE) 3975 goto out; 3976 3977 /* Update cache */ 3978 (void) update_cache_pid2sid(&state, cache, mapping, &idres); 3979 3980 out: 3981 /* 3982 * Note that "mapping" is returned to the client. Therefore 3983 * copy whatever we have in "idres" to mapping->id2 and 3984 * free idres. 3985 */ 3986 mapping->direction = idres.direction; 3987 mapping->id2 = idres.id; 3988 (void) memset(&idres, 0, sizeof (idres)); 3989 xdr_free(xdr_idmap_id_res, (caddr_t)&idres); 3990 cleanup_lookup_state(&state); 3991 return (retcode); 3992 } 3993 3994 static 3995 idmap_retcode 3996 ad_lookup_by_unixname(lookup_state_t *state, 3997 const char *unixname, int is_user, int is_wuser, 3998 char **sidprefix, idmap_rid_t *rid, char **winname, 3999 char **domain, int *type) 4000 { 4001 /* Lookup AD by unixname */ 4002 int retries = 0; 4003 idmap_query_state_t *qs = NULL; 4004 idmap_retcode rc, retcode; 4005 4006 retry: 4007 retcode = idmap_lookup_batch_start(_idmapdstate.ad, 1, &qs); 4008 if (retcode != IDMAP_SUCCESS) { 4009 degrade_svc(); 4010 idmapdlog(LOG_ERR, 4011 "Failed to create request for AD lookup by unixname"); 4012 return (IDMAP_ERR_INTERNAL); 4013 } 4014 4015 restore_svc(); 4016 4017 if (state != NULL) 4018 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 4019 state->ad_unixgroup_attr); 4020 4021 retcode = idmap_unixname2sid_batch_add1(qs, unixname, is_user, 4022 is_wuser, sidprefix, rid, winname, domain, type, &rc); 4023 4024 if (retcode != IDMAP_SUCCESS) 4025 idmap_lookup_release_batch(&qs); 4026 else 4027 retcode = idmap_lookup_batch_end(&qs, NULL); 4028 4029 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 4030 goto retry; 4031 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 4032 degrade_svc(); 4033 4034 if (retcode != IDMAP_SUCCESS) { 4035 idmapdlog(LOG_NOTICE, "AD lookup by unixname failed"); 4036 return (retcode); 4037 } 4038 return (rc); 4039 } 4040 4041 /* 4042 * This function is called whenever a non-batched AD lookup needs to be 4043 * done (e.g. get_w2u_mapping() and get_u2w_mapping()). It's already 4044 * determined by the caller before calling this function that AD lookup is 4045 * needed and has already searched the well-known SIDs table and name_cache. 4046 */ 4047 static 4048 idmap_retcode 4049 ad_lookup(lookup_state_t *state, idmap_mapping *req, idmap_id_res *res, 4050 int w2u, int getunixattr, int byunixattr) 4051 { 4052 idmap_retcode retcode; 4053 int type, eunixtype, is_user, is_wuser; 4054 char *canonname = NULL; 4055 4056 if (w2u) { 4057 /* 4058 * win2unix lookup requests (get_w2u_mapping()) calls this 4059 * function to lookup by sid OR winname and to retrieve 4060 * SID, winname, sidtype (user or group) and unixnames 4061 * from AD. 4062 */ 4063 4064 /* Set the expected unixtype */ 4065 if (res->id.idtype == IDMAP_UID) 4066 eunixtype = _IDMAP_T_USER; 4067 else if (res->id.idtype == IDMAP_GID) 4068 eunixtype = _IDMAP_T_GROUP; 4069 else 4070 eunixtype = _IDMAP_T_UNDEF; 4071 4072 if (req->id1.idmap_id_u.sid.prefix != NULL) { 4073 /* AD lookup by sid */ 4074 retcode = ad_lookup_by_sid( 4075 state, req->id1.idmap_id_u.sid.prefix, 4076 req->id1.idmap_id_u.sid.rid, eunixtype, 4077 (req->id1name == NULL) ? &req->id1name : NULL, 4078 (req->id1domain == NULL) ? &req->id1domain : NULL, 4079 &type, (getunixattr && req->id2name == NULL) 4080 ? &req->id2name : NULL); 4081 } else { 4082 assert(req->id1name != NULL); 4083 /* AD lookup by winname */ 4084 retcode = ad_lookup_by_winname( 4085 state, req->id1name, req->id1domain, eunixtype, 4086 &canonname, &req->id1.idmap_id_u.sid.prefix, 4087 &req->id1.idmap_id_u.sid.rid, &type, 4088 (getunixattr && req->id2name == NULL) 4089 ? &req->id2name : NULL); 4090 4091 if (canonname != NULL) { 4092 free(req->id1name); 4093 req->id1name = canonname; 4094 } 4095 } 4096 if (retcode == IDMAP_SUCCESS) { 4097 switch (type) { 4098 case _IDMAP_T_USER: 4099 if (res->id.idtype == IDMAP_POSIXID) 4100 res->id.idtype = IDMAP_UID; 4101 req->id1.idtype = IDMAP_USID; 4102 break; 4103 case _IDMAP_T_GROUP: 4104 if (res->id.idtype == IDMAP_POSIXID) 4105 res->id.idtype = IDMAP_GID; 4106 req->id1.idtype = IDMAP_GSID; 4107 break; 4108 default: 4109 return (IDMAP_ERR_SID); 4110 } 4111 } 4112 return (retcode); 4113 } 4114 4115 /* 4116 * unix2win lookup requests (get_u2w_mapping()) calls this 4117 * function to lookup AD by unixname and to retrieve 4118 * SID, winname, and sidtype (user or group) from AD. 4119 */ 4120 4121 /* Set the expected unixtype */ 4122 eunixtype = (req->id1.idtype == IDMAP_UID) ? _IDMAP_T_USER : 4123 _IDMAP_T_GROUP; 4124 4125 if (byunixattr) { 4126 /* AD lookup by unixname */ 4127 is_user = (IS_REQUEST_UID(*req)) ? 1 : 0; 4128 if (res->id.idtype == IDMAP_USID) 4129 is_wuser = 1; 4130 else if (res->id.idtype == IDMAP_GSID) 4131 is_wuser = 0; 4132 else 4133 is_wuser = is_user; 4134 retcode = ad_lookup_by_unixname( 4135 state, req->id1name, is_user, is_wuser, 4136 (res->id.idmap_id_u.sid.prefix == NULL) ? 4137 &res->id.idmap_id_u.sid.prefix : NULL, 4138 (res->id.idmap_id_u.sid.prefix == NULL) ? 4139 &res->id.idmap_id_u.sid.rid : NULL, 4140 (req->id2name == NULL) ? &req->id2name : NULL, 4141 (req->id2domain == NULL) ? &req->id2domain : NULL, NULL); 4142 } else if (res->id.idmap_id_u.sid.prefix != NULL) { 4143 /* AD lookup by sid */ 4144 retcode = ad_lookup_by_sid( 4145 state, res->id.idmap_id_u.sid.prefix, 4146 res->id.idmap_id_u.sid.rid, eunixtype, 4147 (req->id2name == NULL) ? &req->id2name : NULL, 4148 (req->id2domain == NULL) ? &req->id2domain : NULL, 4149 NULL, (getunixattr && req->id1name == NULL) 4150 ? &req->id1name : NULL); 4151 } else { 4152 /* AD lookup by winname */ 4153 assert(req->id2name != NULL); 4154 retcode = ad_lookup_by_winname( 4155 state, req->id2name, req->id2domain, eunixtype, 4156 &canonname, &res->id.idmap_id_u.sid.prefix, 4157 &res->id.idmap_id_u.sid.rid, NULL, 4158 (getunixattr && req->id1name == NULL) 4159 ? &req->id1name : NULL); 4160 4161 if (canonname != NULL) { 4162 free(req->id2name); 4163 req->id2name = canonname; 4164 } 4165 } 4166 4167 if (retcode == IDMAP_SUCCESS) { 4168 switch (type) { 4169 case _IDMAP_T_USER: 4170 if (res->id.idtype == IDMAP_SID) 4171 res->id.idtype = IDMAP_USID; 4172 break; 4173 case _IDMAP_T_GROUP: 4174 if (res->id.idtype == IDMAP_SID) 4175 res->id.idtype = IDMAP_GSID; 4176 break; 4177 default: 4178 return (IDMAP_ERR_SID); 4179 } 4180 } 4181 return (retcode); 4182 } 4183