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 if (!(req->direction & _IDMAP_F_LOOKUP_AD)) 1884 /* Entry that wasn't marked for AD lookup - skip */ 1885 continue; 1886 1887 if (retcode != IDMAP_SUCCESS) { 1888 res->retcode = retcode; 1889 continue; 1890 } 1891 1892 if (!add) 1893 continue; 1894 1895 res = &result->ids.ids_val[i]; 1896 1897 if (IS_REQUEST_SID(*req, 1)) { 1898 if (res->retcode != IDMAP_SUCCESS) 1899 continue; 1900 switch (type) { 1901 case _IDMAP_T_USER: 1902 if (res->id.idtype == IDMAP_POSIXID) 1903 res->id.idtype = IDMAP_UID; 1904 req->id1.idtype = IDMAP_USID; 1905 break; 1906 case _IDMAP_T_GROUP: 1907 if (res->id.idtype == IDMAP_POSIXID) 1908 res->id.idtype = IDMAP_GID; 1909 req->id1.idtype = IDMAP_GSID; 1910 break; 1911 default: 1912 res->retcode = IDMAP_ERR_SID; 1913 break; 1914 } 1915 } else if (IS_REQUEST_UID(*req) || IS_REQUEST_GID(*req)) { 1916 if (res->retcode != IDMAP_SUCCESS) { 1917 if ((!(IDMAP_FATAL_ERROR(res->retcode))) && 1918 res->id.idmap_id_u.sid.prefix == NULL && 1919 req->id2name == NULL && /* no winname */ 1920 req->id1name != NULL) /* unixname */ 1921 /* 1922 * Here we have a pid2sid request 1923 * that was marked for AD lookup 1924 * with no SID, no winname but with 1925 * unixname. This request was 1926 * added to the batch to do AD lookup 1927 * by unixname but it failed with non 1928 * fatal error. In such case we 1929 * ignore the error (i.e set 1930 * res->retcode to success) so that 1931 * next pass considers it for name 1932 * based mapping rules or ephemeral 1933 * mapping. 1934 */ 1935 res->retcode = IDMAP_SUCCESS; 1936 continue; 1937 } 1938 switch (type) { 1939 case _IDMAP_T_USER: 1940 if (res->id.idtype == IDMAP_SID) 1941 res->id.idtype = IDMAP_USID; 1942 break; 1943 case _IDMAP_T_GROUP: 1944 if (res->id.idtype == IDMAP_SID) 1945 res->id.idtype = IDMAP_GSID; 1946 break; 1947 default: 1948 res->retcode = IDMAP_ERR_SID; 1949 break; 1950 } 1951 } 1952 } 1953 1954 /* AD lookups done. Reset state->ad_nqueries and return */ 1955 state->ad_nqueries = 0; 1956 return (retcode); 1957 } 1958 1959 /* 1960 * Convention when processing win2unix requests: 1961 * 1962 * Windows identity: 1963 * req->id1name = 1964 * winname if given otherwise winname found will be placed 1965 * here. 1966 * req->id1domain = 1967 * windomain if given otherwise windomain found will be 1968 * placed here. 1969 * req->id1.idtype = 1970 * Either IDMAP_SID/USID/GSID. If this is IDMAP_SID then it'll 1971 * be set to IDMAP_USID/GSID depending upon whether the 1972 * given SID is user or group respectively. The user/group-ness 1973 * is determined either when looking up well-known SIDs table OR 1974 * if the SID is found in namecache OR by ad_lookup() OR by 1975 * ad_lookup_batch(). 1976 * req->id1..sid.[prefix, rid] = 1977 * SID if given otherwise SID found will be placed here. 1978 * 1979 * Unix identity: 1980 * req->id2name = 1981 * unixname found will be placed here. 1982 * req->id2domain = 1983 * NOT USED 1984 * res->id.idtype = 1985 * Target type initialized from req->id2.idtype. If 1986 * it is IDMAP_POSIXID then actual type (IDMAP_UID/GID) found 1987 * will be placed here. 1988 * res->id..[uid or gid] = 1989 * UID/GID found will be placed here. 1990 * 1991 * Others: 1992 * res->retcode = 1993 * Return status for this request will be placed here. 1994 * res->direction = 1995 * Direction found will be placed here. Direction 1996 * meaning whether the resultant mapping is valid 1997 * only from win2unix or bi-directional. 1998 * req->direction = 1999 * INTERNAL USE. Used by idmapd to set various 2000 * flags (_IDMAP_F_xxxx) to aid in processing 2001 * of the request. 2002 * req->id2.idtype = 2003 * INTERNAL USE. Initially this is the requested target 2004 * type and is used to initialize res->id.idtype. 2005 * ad_lookup_batch() uses this field temporarily to store 2006 * sid_type obtained by the batched AD lookups and after 2007 * use resets it to IDMAP_NONE to prevent xdr from 2008 * mis-interpreting the contents of req->id2. 2009 * req->id2..[uid or gid or sid] = 2010 * NOT USED 2011 */ 2012 2013 /* 2014 * This function does the following: 2015 * 1. Lookup well-known SIDs table. 2016 * 2. Check if the given SID is a local-SID and if so extract UID/GID from it. 2017 * 3. Lookup cache. 2018 * 4. Check if the client does not want new mapping to be allocated 2019 * in which case this pass is the final pass. 2020 * 5. Set AD lookup flag if it determines that the next stage needs 2021 * to do AD lookup. 2022 */ 2023 idmap_retcode 2024 sid2pid_first_pass(lookup_state_t *state, sqlite *cache, idmap_mapping *req, 2025 idmap_id_res *res) 2026 { 2027 idmap_retcode retcode; 2028 int wksid; 2029 2030 /* Initialize result */ 2031 res->id.idtype = req->id2.idtype; 2032 res->id.idmap_id_u.uid = SENTINEL_PID; 2033 res->direction = IDMAP_DIRECTION_UNDEF; 2034 wksid = 0; 2035 2036 if (EMPTY_STRING(req->id1.idmap_id_u.sid.prefix)) { 2037 if (req->id1name == NULL) { 2038 retcode = IDMAP_ERR_ARG; 2039 goto out; 2040 } 2041 /* sanitize sidprefix */ 2042 free(req->id1.idmap_id_u.sid.prefix); 2043 req->id1.idmap_id_u.sid.prefix = NULL; 2044 } 2045 2046 /* Lookup well-known SIDs table */ 2047 retcode = lookup_wksids_sid2pid(req, res, &wksid); 2048 if (retcode != IDMAP_ERR_NOTFOUND) 2049 goto out; 2050 2051 /* Check if this is a localsid */ 2052 if (!wksid) { 2053 retcode = lookup_localsid2pid(req, res); 2054 if (retcode != IDMAP_ERR_NOTFOUND) 2055 goto out; 2056 } 2057 2058 /* Lookup cache */ 2059 retcode = lookup_cache_sid2pid(cache, req, res); 2060 if (retcode != IDMAP_ERR_NOTFOUND) 2061 goto out; 2062 2063 if (DO_NOT_ALLOC_NEW_ID_MAPPING(req) || AVOID_NAMESERVICE(req)) { 2064 retcode = IDMAP_ERR_NOMAPPING; 2065 goto out; 2066 } 2067 2068 /* 2069 * Failed to find non-expired entry in cache. Next step is 2070 * to determine if this request needs to be batched for AD lookup. 2071 * 2072 * At this point we have either sid or winname or both. If we don't 2073 * have both then lookup name_cache for the sid or winname 2074 * whichever is missing. If not found then this request will be 2075 * batched for AD lookup. 2076 */ 2077 retcode = lookup_name_cache(cache, req, res); 2078 if (retcode != IDMAP_SUCCESS && retcode != IDMAP_ERR_NOTFOUND) 2079 goto out; 2080 2081 /* 2082 * Set the flag to indicate that we are not done yet so that 2083 * subsequent passes considers this request for name-based 2084 * mapping and ephemeral mapping. 2085 */ 2086 state->sid2pid_done = FALSE; 2087 req->direction |= _IDMAP_F_NOTDONE; 2088 2089 /* 2090 * Even if we have both sid and winname, we still may need to batch 2091 * this request for AD lookup if we don't have unixname and 2092 * directory-based name mapping (AD or mixed) is enabled. 2093 * We avoid AD lookup for well-known SIDs because they don't have 2094 * regular AD objects. 2095 */ 2096 if (retcode != IDMAP_SUCCESS || 2097 (!wksid && req->id2name == NULL && 2098 AD_OR_MIXED_MODE(res->id.idtype, state))) { 2099 retcode = IDMAP_SUCCESS; 2100 req->direction |= _IDMAP_F_LOOKUP_AD; 2101 state->ad_nqueries++; 2102 } 2103 2104 2105 out: 2106 res->retcode = idmap_stat4prot(retcode); 2107 /* 2108 * If we are done and there was an error then set fallback pid 2109 * in the result. 2110 */ 2111 if (ARE_WE_DONE(req->direction) && res->retcode != IDMAP_SUCCESS) 2112 res->id.idmap_id_u.uid = UID_NOBODY; 2113 return (retcode); 2114 } 2115 2116 /* 2117 * Generate SID using the following convention 2118 * <machine-sid-prefix>-<1000 + uid> 2119 * <machine-sid-prefix>-<2^31 + gid> 2120 */ 2121 static 2122 idmap_retcode 2123 generate_localsid(idmap_mapping *req, idmap_id_res *res, int is_user) 2124 { 2125 free(res->id.idmap_id_u.sid.prefix); 2126 res->id.idmap_id_u.sid.prefix = NULL; 2127 2128 /* 2129 * Diagonal mapping for localSIDs not supported because of the 2130 * way we generate localSIDs. 2131 */ 2132 if (is_user && res->id.idtype == IDMAP_GSID) 2133 return (IDMAP_ERR_NOMAPPING); 2134 if (!is_user && res->id.idtype == IDMAP_USID) 2135 return (IDMAP_ERR_NOMAPPING); 2136 2137 /* Skip 1000 UIDs */ 2138 if (is_user && req->id1.idmap_id_u.uid > 2139 (INT32_MAX - LOCALRID_MIN)) 2140 return (IDMAP_ERR_NOMAPPING); 2141 2142 RDLOCK_CONFIG(); 2143 /* 2144 * machine_sid is never NULL because if it is we won't be here. 2145 * No need to assert because stdrup(NULL) will core anyways. 2146 */ 2147 res->id.idmap_id_u.sid.prefix = 2148 strdup(_idmapdstate.cfg->pgcfg.machine_sid); 2149 if (res->id.idmap_id_u.sid.prefix == NULL) { 2150 UNLOCK_CONFIG(); 2151 idmapdlog(LOG_ERR, "Out of memory"); 2152 return (IDMAP_ERR_MEMORY); 2153 } 2154 UNLOCK_CONFIG(); 2155 res->id.idmap_id_u.sid.rid = 2156 (is_user) ? req->id1.idmap_id_u.uid + LOCALRID_MIN : 2157 req->id1.idmap_id_u.gid + INT32_MAX + 1; 2158 res->direction = IDMAP_DIRECTION_BI; 2159 if (res->id.idtype == IDMAP_SID) 2160 res->id.idtype = is_user ? IDMAP_USID : IDMAP_GSID; 2161 2162 /* 2163 * Don't update name_cache because local sids don't have 2164 * valid windows names. 2165 */ 2166 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 2167 return (IDMAP_SUCCESS); 2168 } 2169 2170 static 2171 idmap_retcode 2172 lookup_localsid2pid(idmap_mapping *req, idmap_id_res *res) 2173 { 2174 char *sidprefix; 2175 uint32_t rid; 2176 int s; 2177 2178 /* 2179 * If the sidprefix == localsid then UID = last RID - 1000 or 2180 * GID = last RID - 2^31. 2181 */ 2182 if ((sidprefix = req->id1.idmap_id_u.sid.prefix) == NULL) 2183 /* This means we are looking up by winname */ 2184 return (IDMAP_ERR_NOTFOUND); 2185 rid = req->id1.idmap_id_u.sid.rid; 2186 2187 RDLOCK_CONFIG(); 2188 s = (_idmapdstate.cfg->pgcfg.machine_sid) ? 2189 strcasecmp(sidprefix, _idmapdstate.cfg->pgcfg.machine_sid) : 1; 2190 UNLOCK_CONFIG(); 2191 2192 /* 2193 * If the given sidprefix does not match machine_sid then this is 2194 * not a local SID. 2195 */ 2196 if (s != 0) 2197 return (IDMAP_ERR_NOTFOUND); 2198 2199 switch (res->id.idtype) { 2200 case IDMAP_UID: 2201 if (rid > INT32_MAX || rid < LOCALRID_MIN) 2202 return (IDMAP_ERR_ARG); 2203 res->id.idmap_id_u.uid = rid - LOCALRID_MIN; 2204 break; 2205 case IDMAP_GID: 2206 if (rid <= INT32_MAX) 2207 return (IDMAP_ERR_ARG); 2208 res->id.idmap_id_u.gid = rid - INT32_MAX - 1; 2209 break; 2210 case IDMAP_POSIXID: 2211 if (rid > INT32_MAX) { 2212 res->id.idmap_id_u.gid = rid - INT32_MAX - 1; 2213 res->id.idtype = IDMAP_GID; 2214 } else if (rid < LOCALRID_MIN) { 2215 return (IDMAP_ERR_ARG); 2216 } else { 2217 res->id.idmap_id_u.uid = rid - LOCALRID_MIN; 2218 res->id.idtype = IDMAP_UID; 2219 } 2220 break; 2221 default: 2222 return (IDMAP_ERR_NOTSUPPORTED); 2223 } 2224 return (IDMAP_SUCCESS); 2225 } 2226 2227 /* 2228 * Name service lookup by unixname to get pid 2229 */ 2230 static 2231 idmap_retcode 2232 ns_lookup_byname(const char *name, const char *lower_name, idmap_id *id) 2233 { 2234 struct passwd pwd, *pwdp; 2235 struct group grp, *grpp; 2236 char buf[1024]; 2237 int errnum; 2238 const char *me = "ns_lookup_byname"; 2239 2240 switch (id->idtype) { 2241 case IDMAP_UID: 2242 pwdp = getpwnam_r(name, &pwd, buf, sizeof (buf)); 2243 if (pwdp == NULL && errno == 0 && lower_name != NULL && 2244 name != lower_name && strcmp(name, lower_name) != 0) 2245 pwdp = getpwnam_r(lower_name, &pwd, buf, sizeof (buf)); 2246 if (pwdp == NULL) { 2247 errnum = errno; 2248 idmapdlog(LOG_WARNING, 2249 "%s: getpwnam_r(%s) failed (%s).", 2250 me, name, errnum ? strerror(errnum) : "not found"); 2251 if (errnum == 0) 2252 return (IDMAP_ERR_NOTFOUND); 2253 else 2254 return (IDMAP_ERR_INTERNAL); 2255 } 2256 id->idmap_id_u.uid = pwd.pw_uid; 2257 break; 2258 case IDMAP_GID: 2259 grpp = getgrnam_r(name, &grp, buf, sizeof (buf)); 2260 if (grpp == NULL && errno == 0 && lower_name != NULL && 2261 name != lower_name && strcmp(name, lower_name) != 0) 2262 grpp = getgrnam_r(lower_name, &grp, buf, sizeof (buf)); 2263 if (grpp == NULL) { 2264 errnum = errno; 2265 idmapdlog(LOG_WARNING, 2266 "%s: getgrnam_r(%s) failed (%s).", 2267 me, name, errnum ? strerror(errnum) : "not found"); 2268 if (errnum == 0) 2269 return (IDMAP_ERR_NOTFOUND); 2270 else 2271 return (IDMAP_ERR_INTERNAL); 2272 } 2273 id->idmap_id_u.gid = grp.gr_gid; 2274 break; 2275 default: 2276 return (IDMAP_ERR_ARG); 2277 } 2278 return (IDMAP_SUCCESS); 2279 } 2280 2281 2282 /* 2283 * Name service lookup by pid to get unixname 2284 */ 2285 static 2286 idmap_retcode 2287 ns_lookup_bypid(uid_t pid, int is_user, char **unixname) 2288 { 2289 struct passwd pwd; 2290 struct group grp; 2291 char buf[1024]; 2292 int errnum; 2293 const char *me = "ns_lookup_bypid"; 2294 2295 if (is_user) { 2296 errno = 0; 2297 if (getpwuid_r(pid, &pwd, buf, sizeof (buf)) == NULL) { 2298 errnum = errno; 2299 idmapdlog(LOG_WARNING, 2300 "%s: getpwuid_r(%u) failed (%s).", 2301 me, pid, errnum ? strerror(errnum) : "not found"); 2302 if (errnum == 0) 2303 return (IDMAP_ERR_NOTFOUND); 2304 else 2305 return (IDMAP_ERR_INTERNAL); 2306 } 2307 *unixname = strdup(pwd.pw_name); 2308 } else { 2309 errno = 0; 2310 if (getgrgid_r(pid, &grp, buf, sizeof (buf)) == NULL) { 2311 errnum = errno; 2312 idmapdlog(LOG_WARNING, 2313 "%s: getgrgid_r(%u) failed (%s).", 2314 me, pid, errnum ? strerror(errnum) : "not found"); 2315 if (errnum == 0) 2316 return (IDMAP_ERR_NOTFOUND); 2317 else 2318 return (IDMAP_ERR_INTERNAL); 2319 } 2320 *unixname = strdup(grp.gr_name); 2321 } 2322 if (*unixname == NULL) 2323 return (IDMAP_ERR_MEMORY); 2324 return (IDMAP_SUCCESS); 2325 } 2326 2327 /* 2328 * Name-based mapping 2329 * 2330 * Case 1: If no rule matches do ephemeral 2331 * 2332 * Case 2: If rule matches and unixname is "" then return no mapping. 2333 * 2334 * Case 3: If rule matches and unixname is specified then lookup name 2335 * service using the unixname. If unixname not found then return no mapping. 2336 * 2337 * Case 4: If rule matches and unixname is * then lookup name service 2338 * using winname as the unixname. If unixname not found then process 2339 * other rules using the lookup order. If no other rule matches then do 2340 * ephemeral. Otherwise, based on the matched rule do Case 2 or 3 or 4. 2341 * This allows us to specify a fallback unixname per _domain_ or no mapping 2342 * instead of the default behaviour of doing ephemeral mapping. 2343 * 2344 * Example 1: 2345 * *@sfbay == * 2346 * If looking up windows users foo@sfbay and foo does not exists in 2347 * the name service then foo@sfbay will be mapped to an ephemeral id. 2348 * 2349 * Example 2: 2350 * *@sfbay == * 2351 * *@sfbay => guest 2352 * If looking up windows users foo@sfbay and foo does not exists in 2353 * the name service then foo@sfbay will be mapped to guest. 2354 * 2355 * Example 3: 2356 * *@sfbay == * 2357 * *@sfbay => "" 2358 * If looking up windows users foo@sfbay and foo does not exists in 2359 * the name service then we will return no mapping for foo@sfbay. 2360 * 2361 */ 2362 static 2363 idmap_retcode 2364 name_based_mapping_sid2pid(sqlite *db, idmap_mapping *req, idmap_id_res *res) 2365 { 2366 const char *unixname, *windomain; 2367 char *sql = NULL, *errmsg = NULL, *lower_winname = NULL; 2368 idmap_retcode retcode; 2369 char *end, *lower_unixname, *winname; 2370 const char **values; 2371 sqlite_vm *vm = NULL; 2372 int ncol, r, i, is_user, is_wuser; 2373 const char *me = "name_based_mapping_sid2pid"; 2374 2375 assert(req->id1name != NULL); /* We have winname */ 2376 assert(req->id2name == NULL); /* We don't have unixname */ 2377 2378 winname = req->id1name; 2379 windomain = req->id1domain; 2380 2381 switch (req->id1.idtype) { 2382 case IDMAP_USID: 2383 is_wuser = 1; 2384 break; 2385 case IDMAP_GSID: 2386 is_wuser = 0; 2387 break; 2388 default: 2389 idmapdlog(LOG_ERR, "%s: Unable to determine if the " 2390 "given Windows id is user or group.", me); 2391 return (IDMAP_ERR_INTERNAL); 2392 } 2393 2394 switch (res->id.idtype) { 2395 case IDMAP_UID: 2396 is_user = 1; 2397 break; 2398 case IDMAP_GID: 2399 is_user = 0; 2400 break; 2401 case IDMAP_POSIXID: 2402 is_user = is_wuser; 2403 res->id.idtype = is_user ? IDMAP_UID : IDMAP_GID; 2404 break; 2405 } 2406 2407 i = 0; 2408 if (windomain == NULL) { 2409 windomain = ""; 2410 } else { 2411 RDLOCK_CONFIG(); 2412 if (_idmapdstate.cfg->pgcfg.default_domain != NULL) { 2413 if (strcasecmp(_idmapdstate.cfg->pgcfg.default_domain, 2414 windomain) == 0) 2415 i = 1; 2416 } 2417 UNLOCK_CONFIG(); 2418 } 2419 2420 if ((lower_winname = tolower_u8(winname)) == NULL) 2421 lower_winname = winname; /* hope for the best */ 2422 sql = sqlite_mprintf( 2423 "SELECT unixname, u2w_order FROM namerules WHERE " 2424 "w2u_order > 0 AND is_user = %d AND is_wuser = %d AND " 2425 "(winname = %Q OR winname = '*') AND " 2426 "(windomain = %Q OR windomain = '*' %s) " 2427 "ORDER BY w2u_order ASC;", 2428 is_user, is_wuser, lower_winname, windomain, 2429 i ? "OR windomain ISNULL OR windomain = ''" : ""); 2430 if (sql == NULL) { 2431 idmapdlog(LOG_ERR, "Out of memory"); 2432 retcode = IDMAP_ERR_MEMORY; 2433 goto out; 2434 } 2435 2436 if (sqlite_compile(db, sql, NULL, &vm, &errmsg) != SQLITE_OK) { 2437 retcode = IDMAP_ERR_INTERNAL; 2438 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 2439 CHECK_NULL(errmsg)); 2440 sqlite_freemem(errmsg); 2441 goto out; 2442 } 2443 2444 for (; ; ) { 2445 r = sqlite_step(vm, &ncol, &values, NULL); 2446 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 2447 2448 if (r == SQLITE_ROW) { 2449 if (ncol < 2) { 2450 retcode = IDMAP_ERR_INTERNAL; 2451 goto out; 2452 } 2453 if (values[0] == NULL) { 2454 retcode = IDMAP_ERR_INTERNAL; 2455 goto out; 2456 } 2457 2458 if (EMPTY_NAME(values[0])) { 2459 retcode = IDMAP_ERR_NOMAPPING; 2460 goto out; 2461 } 2462 unixname = (values[0][0] == '*') ? winname : values[0]; 2463 lower_unixname = (values[0][0] == '*') ? 2464 lower_winname : NULL; 2465 retcode = ns_lookup_byname(unixname, lower_unixname, 2466 &res->id); 2467 if (retcode == IDMAP_ERR_NOTFOUND) { 2468 if (unixname == winname) 2469 /* Case 4 */ 2470 continue; 2471 else 2472 /* Case 3 */ 2473 retcode = IDMAP_ERR_NOMAPPING; 2474 } 2475 goto out; 2476 } else if (r == SQLITE_DONE) { 2477 retcode = IDMAP_ERR_NOTFOUND; 2478 goto out; 2479 } else { 2480 (void) sqlite_finalize(vm, &errmsg); 2481 vm = NULL; 2482 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 2483 CHECK_NULL(errmsg)); 2484 sqlite_freemem(errmsg); 2485 retcode = IDMAP_ERR_INTERNAL; 2486 goto out; 2487 } 2488 } 2489 2490 out: 2491 sqlite_freemem(sql); 2492 if (retcode == IDMAP_SUCCESS) { 2493 if (values[1] != NULL) 2494 res->direction = 2495 (strtol(values[1], &end, 10) == 0)? 2496 IDMAP_DIRECTION_W2U:IDMAP_DIRECTION_BI; 2497 else 2498 res->direction = IDMAP_DIRECTION_W2U; 2499 req->id2name = strdup(unixname); 2500 } 2501 if (lower_winname != NULL && lower_winname != winname) 2502 free(lower_winname); 2503 if (vm != NULL) 2504 (void) sqlite_finalize(vm, NULL); 2505 return (retcode); 2506 } 2507 2508 static 2509 int 2510 get_next_eph_uid(uid_t *next_uid) 2511 { 2512 uid_t uid; 2513 gid_t gid; 2514 int err; 2515 2516 *next_uid = (uid_t)-1; 2517 uid = _idmapdstate.next_uid++; 2518 if (uid >= _idmapdstate.limit_uid) { 2519 if ((err = allocids(0, 8192, &uid, 0, &gid)) != 0) 2520 return (err); 2521 2522 _idmapdstate.limit_uid = uid + 8192; 2523 _idmapdstate.next_uid = uid; 2524 } 2525 *next_uid = uid; 2526 2527 return (0); 2528 } 2529 2530 static 2531 int 2532 get_next_eph_gid(gid_t *next_gid) 2533 { 2534 uid_t uid; 2535 gid_t gid; 2536 int err; 2537 2538 *next_gid = (uid_t)-1; 2539 gid = _idmapdstate.next_gid++; 2540 if (gid >= _idmapdstate.limit_gid) { 2541 if ((err = allocids(0, 0, &uid, 8192, &gid)) != 0) 2542 return (err); 2543 2544 _idmapdstate.limit_gid = gid + 8192; 2545 _idmapdstate.next_gid = gid; 2546 } 2547 *next_gid = gid; 2548 2549 return (0); 2550 } 2551 2552 static 2553 int 2554 gethash(const char *str, uint32_t num, uint_t htsize) 2555 { 2556 uint_t hval, i, len; 2557 2558 if (str == NULL) 2559 return (0); 2560 for (len = strlen(str), hval = 0, i = 0; i < len; i++) { 2561 hval += str[i]; 2562 hval += (hval << 10); 2563 hval ^= (hval >> 6); 2564 } 2565 for (str = (const char *)&num, i = 0; i < sizeof (num); i++) { 2566 hval += str[i]; 2567 hval += (hval << 10); 2568 hval ^= (hval >> 6); 2569 } 2570 hval += (hval << 3); 2571 hval ^= (hval >> 11); 2572 hval += (hval << 15); 2573 return (hval % htsize); 2574 } 2575 2576 static 2577 int 2578 get_from_sid_history(lookup_state_t *state, const char *prefix, uint32_t rid, 2579 uid_t *pid) 2580 { 2581 uint_t next, key; 2582 uint_t htsize = state->sid_history_size; 2583 idmap_sid *sid; 2584 2585 next = gethash(prefix, rid, htsize); 2586 while (next != htsize) { 2587 key = state->sid_history[next].key; 2588 if (key == htsize) 2589 return (0); 2590 sid = &state->batch->idmap_mapping_batch_val[key].id1. 2591 idmap_id_u.sid; 2592 if (sid->rid == rid && strcmp(sid->prefix, prefix) == 0) { 2593 *pid = state->result->ids.ids_val[key].id. 2594 idmap_id_u.uid; 2595 return (1); 2596 } 2597 next = state->sid_history[next].next; 2598 } 2599 return (0); 2600 } 2601 2602 static 2603 void 2604 add_to_sid_history(lookup_state_t *state, const char *prefix, uint32_t rid) 2605 { 2606 uint_t hash, next; 2607 uint_t htsize = state->sid_history_size; 2608 2609 hash = next = gethash(prefix, rid, htsize); 2610 while (state->sid_history[next].key != htsize) { 2611 next++; 2612 next %= htsize; 2613 } 2614 state->sid_history[next].key = state->curpos; 2615 if (hash == next) 2616 return; 2617 state->sid_history[next].next = state->sid_history[hash].next; 2618 state->sid_history[hash].next = next; 2619 } 2620 2621 void 2622 cleanup_lookup_state(lookup_state_t *state) 2623 { 2624 free(state->sid_history); 2625 free(state->ad_unixuser_attr); 2626 free(state->ad_unixgroup_attr); 2627 } 2628 2629 /* ARGSUSED */ 2630 static 2631 idmap_retcode 2632 dynamic_ephemeral_mapping(lookup_state_t *state, sqlite *cache, 2633 idmap_mapping *req, idmap_id_res *res) 2634 { 2635 2636 uid_t next_pid; 2637 2638 res->direction = IDMAP_DIRECTION_BI; 2639 2640 if (IS_EPHEMERAL(res->id.idmap_id_u.uid)) 2641 return (IDMAP_SUCCESS); 2642 2643 if (state->sid_history != NULL && 2644 get_from_sid_history(state, req->id1.idmap_id_u.sid.prefix, 2645 req->id1.idmap_id_u.sid.rid, &next_pid)) { 2646 res->id.idmap_id_u.uid = next_pid; 2647 return (IDMAP_SUCCESS); 2648 } 2649 2650 if (res->id.idtype == IDMAP_UID) { 2651 if (get_next_eph_uid(&next_pid) != 0) 2652 return (IDMAP_ERR_INTERNAL); 2653 res->id.idmap_id_u.uid = next_pid; 2654 } else { 2655 if (get_next_eph_gid(&next_pid) != 0) 2656 return (IDMAP_ERR_INTERNAL); 2657 res->id.idmap_id_u.gid = next_pid; 2658 } 2659 2660 if (state->sid_history != NULL) 2661 add_to_sid_history(state, req->id1.idmap_id_u.sid.prefix, 2662 req->id1.idmap_id_u.sid.rid); 2663 2664 return (IDMAP_SUCCESS); 2665 } 2666 2667 idmap_retcode 2668 sid2pid_second_pass(lookup_state_t *state, sqlite *cache, sqlite *db, 2669 idmap_mapping *req, idmap_id_res *res) 2670 { 2671 idmap_retcode retcode; 2672 2673 /* Check if second pass is needed */ 2674 if (ARE_WE_DONE(req->direction)) 2675 return (res->retcode); 2676 2677 /* Get status from previous pass */ 2678 retcode = res->retcode; 2679 if (retcode != IDMAP_SUCCESS) 2680 goto out; 2681 2682 /* 2683 * If directory-based name mapping is enabled then the unixname 2684 * may already have been retrieved from the AD object (AD-mode or 2685 * mixed-mode) or from native LDAP object (nldap-mode) -- done. 2686 */ 2687 if (req->id2name != NULL) { 2688 assert(res->id.idtype != IDMAP_POSIXID); 2689 if (AD_MODE(res->id.idtype, state)) 2690 res->direction = IDMAP_DIRECTION_BI; 2691 else if (NLDAP_MODE(res->id.idtype, state)) 2692 res->direction = IDMAP_DIRECTION_BI; 2693 else if (MIXED_MODE(res->id.idtype, state)) 2694 res->direction = IDMAP_DIRECTION_W2U; 2695 2696 /* 2697 * Special case: (1) If the ad_unixuser_attr and 2698 * ad_unixgroup_attr uses the same attribute 2699 * name and (2) if this is a diagonal mapping 2700 * request and (3) the unixname has been retrieved 2701 * from the AD object -- then we ignore it and fallback 2702 * to name-based mapping rules and ephemeral mapping 2703 * 2704 * Example: 2705 * Properties: 2706 * config/ad_unixuser_attr = "unixname" 2707 * config/ad_unixgroup_attr = "unixname" 2708 * AD user object: 2709 * dn: cn=bob ... 2710 * objectclass: user 2711 * sam: bob 2712 * unixname: bob1234 2713 * AD group object: 2714 * dn: cn=winadmins ... 2715 * objectclass: group 2716 * sam: winadmins 2717 * unixname: unixadmins 2718 * 2719 * In this example whether "unixname" refers to a unixuser 2720 * or unixgroup depends upon the AD object. 2721 * 2722 * $idmap show -c winname:bob gid 2723 * AD lookup by "samAccountName=bob" for 2724 * "ad_unixgroup_attr (i.e unixname)" for directory-based 2725 * mapping would get "bob1234" which is not what we want. 2726 * Now why not getgrnam_r("bob1234") and use it if it 2727 * is indeed a unixgroup? That's because Unix can have 2728 * users and groups with the same name and we clearly 2729 * don't know the intention of the admin here. 2730 * Therefore we ignore this and fallback to name-based 2731 * mapping rules or ephemeral mapping. 2732 */ 2733 if ((AD_MODE(res->id.idtype, state) || 2734 MIXED_MODE(res->id.idtype, state)) && 2735 state->ad_unixuser_attr != NULL && 2736 state->ad_unixgroup_attr != NULL && 2737 strcasecmp(state->ad_unixuser_attr, 2738 state->ad_unixgroup_attr) == 0 && 2739 ((req->id1.idtype == IDMAP_USID && 2740 res->id.idtype == IDMAP_GID) || 2741 (req->id1.idtype == IDMAP_GSID && 2742 res->id.idtype == IDMAP_UID))) { 2743 free(req->id2name); 2744 req->id2name = NULL; 2745 res->id.idmap_id_u.uid = SENTINEL_PID; 2746 /* fallback */ 2747 } else { 2748 if (res->id.idmap_id_u.uid == SENTINEL_PID) 2749 retcode = ns_lookup_byname(req->id2name, 2750 NULL, &res->id); 2751 /* 2752 * We don't fallback to name-based mapping rules 2753 * or ephemeral mapping. 2754 */ 2755 goto out; 2756 } 2757 } 2758 2759 /* 2760 * If we don't have unixname then evaluate local name-based 2761 * mapping rules. 2762 */ 2763 retcode = name_based_mapping_sid2pid(db, req, res); 2764 if (retcode != IDMAP_ERR_NOTFOUND) 2765 goto out; 2766 2767 /* If not found, do ephemeral mapping */ 2768 retcode = dynamic_ephemeral_mapping(state, cache, req, res); 2769 2770 out: 2771 res->retcode = idmap_stat4prot(retcode); 2772 if (res->retcode != IDMAP_SUCCESS) { 2773 req->direction = _IDMAP_F_DONE; 2774 res->id.idmap_id_u.uid = UID_NOBODY; 2775 } 2776 if (!ARE_WE_DONE(req->direction)) 2777 state->sid2pid_done = FALSE; 2778 return (retcode); 2779 } 2780 2781 idmap_retcode 2782 update_cache_pid2sid(lookup_state_t *state, sqlite *cache, 2783 idmap_mapping *req, idmap_id_res *res) 2784 { 2785 char *sql = NULL; 2786 idmap_retcode retcode; 2787 2788 /* Check if we need to cache anything */ 2789 if (ARE_WE_DONE(req->direction)) 2790 return (IDMAP_SUCCESS); 2791 2792 /* We don't cache negative entries */ 2793 if (res->retcode != IDMAP_SUCCESS) 2794 return (IDMAP_SUCCESS); 2795 2796 assert(res->direction != IDMAP_DIRECTION_UNDEF); 2797 2798 /* 2799 * Using NULL for u2w instead of 0 so that our trigger allows 2800 * the same pid to be the destination in multiple entries 2801 */ 2802 sql = sqlite_mprintf("INSERT OR REPLACE into idmap_cache " 2803 "(sidprefix, rid, windomain, canon_winname, pid, unixname, " 2804 "is_user, is_wuser, expiration, w2u, u2w) " 2805 "VALUES(%Q, %u, %Q, %Q, %u, %Q, %d, %d, " 2806 "strftime('%%s','now') + 600, %q, 1); ", 2807 res->id.idmap_id_u.sid.prefix, res->id.idmap_id_u.sid.rid, 2808 req->id2domain, req->id2name, req->id1.idmap_id_u.uid, 2809 req->id1name, (req->id1.idtype == IDMAP_UID) ? 1 : 0, 2810 (res->id.idtype == IDMAP_USID) ? 1 : 0, 2811 (res->direction == 0) ? "1" : NULL); 2812 2813 if (sql == NULL) { 2814 retcode = IDMAP_ERR_INTERNAL; 2815 idmapdlog(LOG_ERR, "Out of memory"); 2816 goto out; 2817 } 2818 2819 retcode = sql_exec_no_cb(cache, sql); 2820 if (retcode != IDMAP_SUCCESS) 2821 goto out; 2822 2823 state->pid2sid_done = FALSE; 2824 sqlite_freemem(sql); 2825 sql = NULL; 2826 2827 /* Check if we need to update namecache */ 2828 if (req->direction & _IDMAP_F_DONT_UPDATE_NAMECACHE) 2829 goto out; 2830 2831 if (req->id2name == NULL) 2832 goto out; 2833 2834 sql = sqlite_mprintf("INSERT OR REPLACE into name_cache " 2835 "(sidprefix, rid, canon_name, domain, type, expiration) " 2836 "VALUES(%Q, %u, %Q, %Q, %d, strftime('%%s','now') + 3600); ", 2837 res->id.idmap_id_u.sid.prefix, res->id.idmap_id_u.sid.rid, 2838 req->id2name, req->id2domain, 2839 (res->id.idtype == IDMAP_USID) ? _IDMAP_T_USER : _IDMAP_T_GROUP); 2840 2841 if (sql == NULL) { 2842 retcode = IDMAP_ERR_INTERNAL; 2843 idmapdlog(LOG_ERR, "Out of memory"); 2844 goto out; 2845 } 2846 2847 retcode = sql_exec_no_cb(cache, sql); 2848 2849 out: 2850 if (sql != NULL) 2851 sqlite_freemem(sql); 2852 return (retcode); 2853 } 2854 2855 idmap_retcode 2856 update_cache_sid2pid(lookup_state_t *state, sqlite *cache, 2857 idmap_mapping *req, idmap_id_res *res) 2858 { 2859 char *sql = NULL; 2860 idmap_retcode retcode; 2861 int is_eph_user; 2862 2863 /* Check if we need to cache anything */ 2864 if (ARE_WE_DONE(req->direction)) 2865 return (IDMAP_SUCCESS); 2866 2867 /* We don't cache negative entries */ 2868 if (res->retcode != IDMAP_SUCCESS) 2869 return (IDMAP_SUCCESS); 2870 2871 if (req->direction & _IDMAP_F_EXP_EPH_UID) 2872 is_eph_user = 1; 2873 else if (req->direction & _IDMAP_F_EXP_EPH_GID) 2874 is_eph_user = 0; 2875 else 2876 is_eph_user = -1; 2877 2878 if (is_eph_user >= 0 && !IS_EPHEMERAL(res->id.idmap_id_u.uid)) { 2879 sql = sqlite_mprintf("UPDATE idmap_cache " 2880 "SET w2u = 0 WHERE " 2881 "sidprefix = %Q AND rid = %u AND w2u = 1 AND " 2882 "pid >= 2147483648 AND is_user = %d;", 2883 req->id1.idmap_id_u.sid.prefix, 2884 req->id1.idmap_id_u.sid.rid, 2885 is_eph_user); 2886 if (sql == NULL) { 2887 retcode = IDMAP_ERR_INTERNAL; 2888 idmapdlog(LOG_ERR, "Out of memory"); 2889 goto out; 2890 } 2891 2892 retcode = sql_exec_no_cb(cache, sql); 2893 if (retcode != IDMAP_SUCCESS) 2894 goto out; 2895 2896 sqlite_freemem(sql); 2897 sql = NULL; 2898 } 2899 2900 assert(res->direction != IDMAP_DIRECTION_UNDEF); 2901 2902 sql = sqlite_mprintf("INSERT OR REPLACE into idmap_cache " 2903 "(sidprefix, rid, windomain, canon_winname, pid, unixname, " 2904 "is_user, is_wuser, expiration, w2u, u2w) " 2905 "VALUES(%Q, %u, %Q, %Q, %u, %Q, %d, %d, " 2906 "strftime('%%s','now') + 600, 1, %q); ", 2907 req->id1.idmap_id_u.sid.prefix, req->id1.idmap_id_u.sid.rid, 2908 (req->id1domain != NULL) ? req->id1domain : "", req->id1name, 2909 res->id.idmap_id_u.uid, req->id2name, 2910 (res->id.idtype == IDMAP_UID) ? 1 : 0, 2911 (req->id1.idtype == IDMAP_USID) ? 1 : 0, 2912 (res->direction == 0) ? "1" : NULL); 2913 2914 if (sql == NULL) { 2915 retcode = IDMAP_ERR_INTERNAL; 2916 idmapdlog(LOG_ERR, "Out of memory"); 2917 goto out; 2918 } 2919 2920 retcode = sql_exec_no_cb(cache, sql); 2921 if (retcode != IDMAP_SUCCESS) 2922 goto out; 2923 2924 state->sid2pid_done = FALSE; 2925 sqlite_freemem(sql); 2926 sql = NULL; 2927 2928 /* Check if we need to update namecache */ 2929 if (req->direction & _IDMAP_F_DONT_UPDATE_NAMECACHE) 2930 goto out; 2931 2932 if (EMPTY_STRING(req->id1name)) 2933 goto out; 2934 2935 sql = sqlite_mprintf("INSERT OR REPLACE into name_cache " 2936 "(sidprefix, rid, canon_name, domain, type, expiration) " 2937 "VALUES(%Q, %u, %Q, %Q, %d, strftime('%%s','now') + 3600); ", 2938 req->id1.idmap_id_u.sid.prefix, req->id1.idmap_id_u.sid.rid, 2939 req->id1name, req->id1domain, 2940 (req->id1.idtype == IDMAP_USID) ? _IDMAP_T_USER : _IDMAP_T_GROUP); 2941 2942 if (sql == NULL) { 2943 retcode = IDMAP_ERR_INTERNAL; 2944 idmapdlog(LOG_ERR, "Out of memory"); 2945 goto out; 2946 } 2947 2948 retcode = sql_exec_no_cb(cache, sql); 2949 2950 out: 2951 if (sql != NULL) 2952 sqlite_freemem(sql); 2953 return (retcode); 2954 } 2955 2956 static 2957 idmap_retcode 2958 lookup_cache_pid2sid(sqlite *cache, idmap_mapping *req, idmap_id_res *res, 2959 int is_user, int getname) 2960 { 2961 char *end; 2962 char *sql = NULL; 2963 const char **values; 2964 sqlite_vm *vm = NULL; 2965 int ncol; 2966 idmap_retcode retcode = IDMAP_SUCCESS; 2967 time_t curtime; 2968 idmap_id_type idtype; 2969 2970 /* Current time */ 2971 errno = 0; 2972 if ((curtime = time(NULL)) == (time_t)-1) { 2973 idmapdlog(LOG_ERR, "Failed to get current time (%s)", 2974 strerror(errno)); 2975 retcode = IDMAP_ERR_INTERNAL; 2976 goto out; 2977 } 2978 2979 /* SQL to lookup the cache by pid or by unixname */ 2980 if (req->id1.idmap_id_u.uid != SENTINEL_PID) { 2981 sql = sqlite_mprintf("SELECT sidprefix, rid, canon_winname, " 2982 "windomain, w2u, is_wuser " 2983 "FROM idmap_cache WHERE " 2984 "pid = %u AND u2w = 1 AND is_user = %d AND " 2985 "(pid >= 2147483648 OR " 2986 "(expiration = 0 OR expiration ISNULL OR " 2987 "expiration > %d));", 2988 req->id1.idmap_id_u.uid, is_user, curtime); 2989 } else if (req->id1name != NULL) { 2990 sql = sqlite_mprintf("SELECT sidprefix, rid, canon_winname, " 2991 "windomain, w2u, is_wuser " 2992 "FROM idmap_cache WHERE " 2993 "unixname = %Q AND u2w = 1 AND is_user = %d AND " 2994 "(pid >= 2147483648 OR " 2995 "(expiration = 0 OR expiration ISNULL OR " 2996 "expiration > %d));", 2997 req->id1name, is_user, curtime); 2998 } 2999 3000 if (sql == NULL) { 3001 idmapdlog(LOG_ERR, "Out of memory"); 3002 retcode = IDMAP_ERR_MEMORY; 3003 goto out; 3004 } 3005 retcode = sql_compile_n_step_once(cache, sql, &vm, &ncol, 5, &values); 3006 sqlite_freemem(sql); 3007 3008 if (retcode == IDMAP_ERR_NOTFOUND) 3009 goto out; 3010 else if (retcode == IDMAP_SUCCESS) { 3011 /* sanity checks */ 3012 if (values[0] == NULL || values[1] == NULL) { 3013 retcode = IDMAP_ERR_CACHE; 3014 goto out; 3015 } 3016 3017 switch (res->id.idtype) { 3018 case IDMAP_SID: 3019 case IDMAP_USID: 3020 case IDMAP_GSID: 3021 idtype = strtol(values[5], &end, 10) == 1 3022 ? IDMAP_USID : IDMAP_GSID; 3023 3024 if (res->id.idtype == IDMAP_USID && 3025 idtype != IDMAP_USID) { 3026 retcode = IDMAP_ERR_NOTUSER; 3027 goto out; 3028 } else if (res->id.idtype == IDMAP_GSID && 3029 idtype != IDMAP_GSID) { 3030 retcode = IDMAP_ERR_NOTGROUP; 3031 goto out; 3032 } 3033 res->id.idtype = idtype; 3034 3035 res->id.idmap_id_u.sid.rid = 3036 strtoul(values[1], &end, 10); 3037 res->id.idmap_id_u.sid.prefix = strdup(values[0]); 3038 if (res->id.idmap_id_u.sid.prefix == NULL) { 3039 idmapdlog(LOG_ERR, "Out of memory"); 3040 retcode = IDMAP_ERR_MEMORY; 3041 goto out; 3042 } 3043 3044 if (values[4] != NULL) 3045 res->direction = 3046 (strtol(values[4], &end, 10) == 0)? 3047 IDMAP_DIRECTION_U2W:IDMAP_DIRECTION_BI; 3048 else 3049 res->direction = IDMAP_DIRECTION_U2W; 3050 3051 if (getname == 0 || values[2] == NULL) 3052 break; 3053 req->id2name = strdup(values[2]); 3054 if (req->id2name == NULL) { 3055 idmapdlog(LOG_ERR, "Out of memory"); 3056 retcode = IDMAP_ERR_MEMORY; 3057 goto out; 3058 } 3059 3060 if (values[3] == NULL) 3061 break; 3062 req->id2domain = strdup(values[3]); 3063 if (req->id2domain == NULL) { 3064 idmapdlog(LOG_ERR, "Out of memory"); 3065 retcode = IDMAP_ERR_MEMORY; 3066 goto out; 3067 } 3068 3069 break; 3070 default: 3071 retcode = IDMAP_ERR_NOTSUPPORTED; 3072 break; 3073 } 3074 } 3075 3076 out: 3077 if (vm != NULL) 3078 (void) sqlite_finalize(vm, NULL); 3079 return (retcode); 3080 } 3081 3082 static 3083 idmap_retcode 3084 lookup_cache_name2sid(sqlite *cache, const char *name, const char *domain, 3085 char **canonname, char **sidprefix, idmap_rid_t *rid, int *type) 3086 { 3087 char *end, *lower_name; 3088 char *sql = NULL; 3089 const char **values; 3090 sqlite_vm *vm = NULL; 3091 int ncol; 3092 time_t curtime; 3093 idmap_retcode retcode = IDMAP_SUCCESS; 3094 3095 /* Get current time */ 3096 errno = 0; 3097 if ((curtime = time(NULL)) == (time_t)-1) { 3098 idmapdlog(LOG_ERR, "Failed to get current time (%s)", 3099 strerror(errno)); 3100 retcode = IDMAP_ERR_INTERNAL; 3101 goto out; 3102 } 3103 3104 /* SQL to lookup the cache */ 3105 if ((lower_name = tolower_u8(name)) == NULL) 3106 lower_name = (char *)name; 3107 sql = sqlite_mprintf("SELECT sidprefix, rid, type, canon_name " 3108 "FROM name_cache WHERE name = %Q AND domain = %Q AND " 3109 "(expiration = 0 OR expiration ISNULL OR " 3110 "expiration > %d);", lower_name, domain, curtime); 3111 if (lower_name != name) 3112 free(lower_name); 3113 if (sql == NULL) { 3114 idmapdlog(LOG_ERR, "Out of memory"); 3115 retcode = IDMAP_ERR_MEMORY; 3116 goto out; 3117 } 3118 retcode = sql_compile_n_step_once(cache, sql, &vm, &ncol, 4, &values); 3119 sqlite_freemem(sql); 3120 3121 if (retcode == IDMAP_SUCCESS) { 3122 if (type != NULL) { 3123 if (values[2] == NULL) { 3124 retcode = IDMAP_ERR_CACHE; 3125 goto out; 3126 } 3127 *type = strtol(values[2], &end, 10); 3128 } 3129 3130 if (values[0] == NULL || values[1] == NULL) { 3131 retcode = IDMAP_ERR_CACHE; 3132 goto out; 3133 } 3134 3135 if (canonname != NULL) { 3136 assert(values[3] != NULL); 3137 if ((*canonname = strdup(values[3])) == NULL) { 3138 idmapdlog(LOG_ERR, "Out of memory"); 3139 retcode = IDMAP_ERR_MEMORY; 3140 goto out; 3141 } 3142 } 3143 3144 if ((*sidprefix = strdup(values[0])) == NULL) { 3145 idmapdlog(LOG_ERR, "Out of memory"); 3146 retcode = IDMAP_ERR_MEMORY; 3147 if (canonname != NULL) { 3148 free(*canonname); 3149 *canonname = NULL; 3150 } 3151 goto out; 3152 } 3153 *rid = strtoul(values[1], &end, 10); 3154 } 3155 3156 out: 3157 if (vm != NULL) 3158 (void) sqlite_finalize(vm, NULL); 3159 return (retcode); 3160 } 3161 3162 static 3163 idmap_retcode 3164 ad_lookup_by_winname(lookup_state_t *state, 3165 const char *name, const char *domain, int eunixtype, 3166 char **canonname, char **sidprefix, 3167 idmap_rid_t *rid, int *wintype, char **unixname) 3168 { 3169 int retries = 0; 3170 idmap_query_state_t *qs = NULL; 3171 idmap_retcode rc, retcode; 3172 3173 retry: 3174 retcode = idmap_lookup_batch_start(_idmapdstate.ad, 1, &qs); 3175 if (retcode != IDMAP_SUCCESS) { 3176 degrade_svc(); 3177 idmapdlog(LOG_ERR, 3178 "Failed to create request for AD lookup by winname"); 3179 return (retcode); 3180 } 3181 3182 restore_svc(); 3183 3184 if (state != NULL) 3185 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 3186 state->ad_unixgroup_attr); 3187 3188 retcode = idmap_name2sid_batch_add1(qs, name, domain, eunixtype, 3189 canonname, sidprefix, rid, wintype, unixname, &rc); 3190 3191 if (retcode != IDMAP_SUCCESS) 3192 idmap_lookup_release_batch(&qs); 3193 else 3194 retcode = idmap_lookup_batch_end(&qs, NULL); 3195 3196 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 3197 goto retry; 3198 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 3199 degrade_svc(); 3200 3201 if (retcode != IDMAP_SUCCESS) { 3202 idmapdlog(LOG_NOTICE, "AD lookup by winname failed"); 3203 return (retcode); 3204 } 3205 return (rc); 3206 } 3207 3208 static 3209 idmap_retcode 3210 lookup_name2sid(sqlite *cache, const char *name, const char *domain, 3211 int *is_wuser, char **canonname, char **sidprefix, 3212 idmap_rid_t *rid, idmap_mapping *req) 3213 { 3214 int type; 3215 idmap_retcode retcode; 3216 3217 *sidprefix = NULL; 3218 if (canonname != NULL) 3219 *canonname = NULL; 3220 3221 /* Lookup well-known SIDs table */ 3222 retcode = lookup_wksids_name2sid(name, canonname, sidprefix, rid, 3223 &type); 3224 if (retcode == IDMAP_SUCCESS) { 3225 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 3226 goto out; 3227 } else if (retcode != IDMAP_ERR_NOTFOUND) { 3228 return (retcode); 3229 } 3230 3231 /* Lookup cache */ 3232 retcode = lookup_cache_name2sid(cache, name, domain, canonname, 3233 sidprefix, rid, &type); 3234 if (retcode == IDMAP_SUCCESS) { 3235 req->direction |= _IDMAP_F_DONT_UPDATE_NAMECACHE; 3236 goto out; 3237 } else if (retcode != IDMAP_ERR_NOTFOUND) { 3238 return (retcode); 3239 } 3240 3241 /* Lookup AD */ 3242 retcode = ad_lookup_by_winname(NULL, name, domain, _IDMAP_T_UNDEF, 3243 canonname, sidprefix, rid, &type, NULL); 3244 if (retcode != IDMAP_SUCCESS) 3245 return (retcode); 3246 /* Don't need to set req->direction |= _IDMAP_F_LOOKUP_AD; */ 3247 3248 out: 3249 /* 3250 * Entry found (cache or Windows lookup) 3251 * is_wuser is both input as well as output parameter 3252 */ 3253 if (*is_wuser == 1 && type != _IDMAP_T_USER) 3254 retcode = IDMAP_ERR_NOTUSER; 3255 else if (*is_wuser == 0 && type != _IDMAP_T_GROUP) 3256 retcode = IDMAP_ERR_NOTGROUP; 3257 else if (*is_wuser == -1) { 3258 /* Caller wants to know if its user or group */ 3259 if (type == _IDMAP_T_USER) 3260 *is_wuser = 1; 3261 else if (type == _IDMAP_T_GROUP) 3262 *is_wuser = 0; 3263 else 3264 retcode = IDMAP_ERR_SID; 3265 } 3266 3267 if (retcode != IDMAP_SUCCESS) { 3268 free(*sidprefix); 3269 *sidprefix = NULL; 3270 if (canonname != NULL) { 3271 free(*canonname); 3272 *canonname = NULL; 3273 } 3274 } 3275 return (retcode); 3276 } 3277 3278 static 3279 idmap_retcode 3280 name_based_mapping_pid2sid(sqlite *db, sqlite *cache, const char *unixname, 3281 int is_user, idmap_mapping *req, idmap_id_res *res) 3282 { 3283 const char *winname, *windomain; 3284 char *canonname; 3285 char *default_domain = NULL; 3286 char *sql = NULL, *errmsg = NULL; 3287 idmap_retcode retcode; 3288 char *end; 3289 const char **values; 3290 sqlite_vm *vm = NULL; 3291 int ncol, r, nrow; 3292 int is_wuser; 3293 const char *me = "name_based_mapping_pid2sid"; 3294 3295 assert(unixname != NULL); /* We have unixname */ 3296 assert(req->id2name == NULL); /* We don't have winname */ 3297 assert(res->id.idmap_id_u.sid.prefix == NULL); /* No SID either */ 3298 3299 RDLOCK_CONFIG(); 3300 if (_idmapdstate.cfg->pgcfg.default_domain != NULL) { 3301 default_domain = 3302 strdup(_idmapdstate.cfg->pgcfg.default_domain); 3303 if (default_domain == NULL) { 3304 UNLOCK_CONFIG(); 3305 idmapdlog(LOG_ERR, "Out of memory"); 3306 retcode = IDMAP_ERR_MEMORY; 3307 goto out; 3308 } 3309 } 3310 UNLOCK_CONFIG(); 3311 3312 sql = sqlite_mprintf( 3313 "SELECT winname_display, windomain, w2u_order FROM namerules WHERE " 3314 "u2w_order > 0 AND is_user = %d AND " 3315 "(unixname = %Q OR unixname = '*') " 3316 "ORDER BY u2w_order ASC;", is_user, unixname); 3317 if (sql == NULL) { 3318 idmapdlog(LOG_ERR, "Out of memory"); 3319 retcode = IDMAP_ERR_MEMORY; 3320 goto out; 3321 } 3322 3323 if (sqlite_compile(db, sql, NULL, &vm, &errmsg) != SQLITE_OK) { 3324 retcode = IDMAP_ERR_INTERNAL; 3325 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 3326 CHECK_NULL(errmsg)); 3327 sqlite_freemem(errmsg); 3328 goto out; 3329 } 3330 3331 for (nrow = 0; ; ) { 3332 r = sqlite_step(vm, &ncol, &values, NULL); 3333 assert(r != SQLITE_LOCKED && r != SQLITE_BUSY); 3334 if (r == SQLITE_ROW) { 3335 nrow++; 3336 if (ncol < 3) { 3337 retcode = IDMAP_ERR_INTERNAL; 3338 goto out; 3339 } 3340 if (values[0] == NULL) { 3341 /* values [1] and [2] can be null */ 3342 retcode = IDMAP_ERR_INTERNAL; 3343 goto out; 3344 } 3345 if (EMPTY_NAME(values[0])) { 3346 retcode = IDMAP_ERR_NOMAPPING; 3347 goto out; 3348 } 3349 3350 if (values[0][0] == '*') { 3351 if (nrow > 1) { 3352 /* 3353 * There were non-wildcard rules where 3354 * windows identity doesn't exist 3355 */ 3356 retcode = IDMAP_ERR_NOMAPPING; 3357 goto out; 3358 } 3359 winname = unixname; 3360 } else { 3361 winname = values[0]; 3362 } 3363 3364 if (values[1] != NULL) 3365 windomain = values[1]; 3366 else if (default_domain != NULL) 3367 windomain = default_domain; 3368 else { 3369 idmapdlog(LOG_ERR, "%s: no domain", me); 3370 retcode = IDMAP_ERR_DOMAIN_NOTFOUND; 3371 goto out; 3372 } 3373 /* Lookup winname@domain to sid */ 3374 3375 is_wuser = res->id.idtype == IDMAP_USID ? 1 3376 : res->id.idtype == IDMAP_GSID ? 0 3377 : -1; 3378 3379 retcode = lookup_name2sid(cache, winname, windomain, 3380 &is_wuser, &canonname, 3381 &res->id.idmap_id_u.sid.prefix, 3382 &res->id.idmap_id_u.sid.rid, req); 3383 3384 if (retcode == IDMAP_ERR_NOTFOUND) { 3385 continue; 3386 } 3387 3388 goto out; 3389 } else if (r == SQLITE_DONE) { 3390 retcode = IDMAP_ERR_NOTFOUND; 3391 goto out; 3392 } else { 3393 (void) sqlite_finalize(vm, &errmsg); 3394 vm = NULL; 3395 idmapdlog(LOG_ERR, "%s: database error (%s)", me, 3396 CHECK_NULL(errmsg)); 3397 sqlite_freemem(errmsg); 3398 retcode = IDMAP_ERR_INTERNAL; 3399 goto out; 3400 } 3401 } 3402 3403 out: 3404 if (sql != NULL) 3405 sqlite_freemem(sql); 3406 if (retcode == IDMAP_SUCCESS) { 3407 res->id.idtype = is_wuser ? IDMAP_USID : IDMAP_GSID; 3408 3409 if (values[2] != NULL) 3410 res->direction = 3411 (strtol(values[2], &end, 10) == 0)? 3412 IDMAP_DIRECTION_U2W:IDMAP_DIRECTION_BI; 3413 else 3414 res->direction = IDMAP_DIRECTION_U2W; 3415 3416 req->id2name = canonname; 3417 if (req->id2name != NULL) { 3418 if (windomain == default_domain) { 3419 req->id2domain = (char *)windomain; 3420 default_domain = NULL; 3421 } else { 3422 req->id2domain = strdup(windomain); 3423 } 3424 } 3425 } 3426 if (vm != NULL) 3427 (void) sqlite_finalize(vm, NULL); 3428 if (default_domain != NULL) 3429 free(default_domain); 3430 return (retcode); 3431 } 3432 3433 /* 3434 * Convention when processing unix2win requests: 3435 * 3436 * Unix identity: 3437 * req->id1name = 3438 * unixname if given otherwise unixname found will be placed 3439 * here. 3440 * req->id1domain = 3441 * NOT USED 3442 * req->id1.idtype = 3443 * Given type (IDMAP_UID or IDMAP_GID) 3444 * req->id1..[uid or gid] = 3445 * UID/GID if given otherwise UID/GID found will be placed here. 3446 * 3447 * Windows identity: 3448 * req->id2name = 3449 * winname found will be placed here. 3450 * req->id2domain = 3451 * windomain found will be placed here. 3452 * res->id.idtype = 3453 * Target type initialized from req->id2.idtype. If 3454 * it is IDMAP_SID then actual type (IDMAP_USID/GSID) found 3455 * will be placed here. 3456 * req->id..sid.[prefix, rid] = 3457 * SID found will be placed here. 3458 * 3459 * Others: 3460 * res->retcode = 3461 * Return status for this request will be placed here. 3462 * res->direction = 3463 * Direction found will be placed here. Direction 3464 * meaning whether the resultant mapping is valid 3465 * only from unix2win or bi-directional. 3466 * req->direction = 3467 * INTERNAL USE. Used by idmapd to set various 3468 * flags (_IDMAP_F_xxxx) to aid in processing 3469 * of the request. 3470 * req->id2.idtype = 3471 * INTERNAL USE. Initially this is the requested target 3472 * type and is used to initialize res->id.idtype. 3473 * ad_lookup_batch() uses this field temporarily to store 3474 * sid_type obtained by the batched AD lookups and after 3475 * use resets it to IDMAP_NONE to prevent xdr from 3476 * mis-interpreting the contents of req->id2. 3477 * req->id2..[uid or gid or sid] = 3478 * NOT USED 3479 */ 3480 3481 /* 3482 * This function does the following: 3483 * 1. Lookup well-known SIDs table. 3484 * 2. Lookup cache. 3485 * 3. Check if the client does not want new mapping to be allocated 3486 * in which case this pass is the final pass. 3487 * 4. Set AD/NLDAP lookup flags if it determines that the next stage needs 3488 * to do AD/NLDAP lookup. 3489 */ 3490 idmap_retcode 3491 pid2sid_first_pass(lookup_state_t *state, sqlite *cache, 3492 idmap_mapping *req, idmap_id_res *res, int is_user, 3493 int getname) 3494 { 3495 idmap_retcode retcode; 3496 bool_t gen_localsid_on_err = FALSE; 3497 3498 /* Initialize result */ 3499 res->id.idtype = req->id2.idtype; 3500 res->direction = IDMAP_DIRECTION_UNDEF; 3501 3502 if (req->id2.idmap_id_u.sid.prefix != NULL) { 3503 /* sanitize sidprefix */ 3504 free(req->id2.idmap_id_u.sid.prefix); 3505 req->id2.idmap_id_u.sid.prefix = NULL; 3506 } 3507 3508 /* Lookup well-known SIDs table */ 3509 retcode = lookup_wksids_pid2sid(req, res, is_user); 3510 if (retcode != IDMAP_ERR_NOTFOUND) 3511 goto out; 3512 3513 /* Lookup cache */ 3514 retcode = lookup_cache_pid2sid(cache, req, res, is_user, getname); 3515 if (retcode != IDMAP_ERR_NOTFOUND) 3516 goto out; 3517 3518 /* Ephemeral ids cannot be allocated during pid2sid */ 3519 if (IS_EPHEMERAL(req->id1.idmap_id_u.uid)) { 3520 retcode = IDMAP_ERR_NOMAPPING; 3521 goto out; 3522 } 3523 3524 if (DO_NOT_ALLOC_NEW_ID_MAPPING(req) || AVOID_NAMESERVICE(req)) { 3525 gen_localsid_on_err = TRUE; 3526 retcode = IDMAP_ERR_NOMAPPING; 3527 goto out; 3528 } 3529 3530 /* Set flags for the next stage */ 3531 if (AD_MODE(req->id1.idtype, state)) { 3532 /* 3533 * If AD-based name mapping is enabled then the next stage 3534 * will need to lookup AD using unixname to get the 3535 * corresponding winname. 3536 */ 3537 if (req->id1name == NULL) { 3538 /* Get unixname if only pid is given. */ 3539 retcode = ns_lookup_bypid(req->id1.idmap_id_u.uid, 3540 is_user, &req->id1name); 3541 if (retcode != IDMAP_SUCCESS) 3542 goto out; 3543 } 3544 req->direction |= _IDMAP_F_LOOKUP_AD; 3545 state->ad_nqueries++; 3546 } else if (NLDAP_OR_MIXED_MODE(req->id1.idtype, state)) { 3547 /* 3548 * If native LDAP or mixed mode is enabled for name mapping 3549 * then the next stage will need to lookup native LDAP using 3550 * unixname/pid to get the corresponding winname. 3551 */ 3552 req->direction |= _IDMAP_F_LOOKUP_NLDAP; 3553 state->nldap_nqueries++; 3554 } 3555 3556 /* 3557 * Failed to find non-expired entry in cache. Set the flag to 3558 * indicate that we are not done yet. 3559 */ 3560 state->pid2sid_done = FALSE; 3561 req->direction |= _IDMAP_F_NOTDONE; 3562 retcode = IDMAP_SUCCESS; 3563 3564 out: 3565 res->retcode = idmap_stat4prot(retcode); 3566 if (ARE_WE_DONE(req->direction) && res->retcode != IDMAP_SUCCESS) 3567 if (gen_localsid_on_err == TRUE) 3568 (void) generate_localsid(req, res, is_user); 3569 return (retcode); 3570 } 3571 3572 idmap_retcode 3573 pid2sid_second_pass(lookup_state_t *state, sqlite *cache, sqlite *db, 3574 idmap_mapping *req, idmap_id_res *res, int is_user) 3575 { 3576 bool_t gen_localsid_on_err = TRUE; 3577 idmap_retcode retcode = IDMAP_SUCCESS; 3578 3579 /* Check if second pass is needed */ 3580 if (ARE_WE_DONE(req->direction)) 3581 return (res->retcode); 3582 3583 /* Get status from previous pass */ 3584 retcode = res->retcode; 3585 if (retcode != IDMAP_SUCCESS) 3586 goto out; 3587 3588 /* 3589 * If directory-based name mapping is enabled then the winname 3590 * may already have been retrieved from the AD object (AD-mode) 3591 * or from native LDAP object (nldap-mode or mixed-mode) -- done. 3592 */ 3593 if (res->id.idmap_id_u.sid.prefix != NULL || req->id2name != NULL) { 3594 if (AD_MODE(req->id1.idtype, state)) 3595 res->direction = IDMAP_DIRECTION_BI; 3596 else if (NLDAP_MODE(req->id1.idtype, state)) 3597 res->direction = IDMAP_DIRECTION_BI; 3598 else if (MIXED_MODE(req->id1.idtype, state)) 3599 res->direction = IDMAP_DIRECTION_W2U; 3600 goto out; 3601 } 3602 3603 if (req->id1name == NULL) { 3604 /* Get unixname from name service */ 3605 retcode = ns_lookup_bypid(req->id1.idmap_id_u.uid, is_user, 3606 &req->id1name); 3607 if (retcode != IDMAP_SUCCESS) 3608 goto out; 3609 } else if (req->id1.idmap_id_u.uid == SENTINEL_PID) { 3610 /* Get pid from name service */ 3611 retcode = ns_lookup_byname(req->id1name, NULL, &req->id1); 3612 if (retcode != IDMAP_SUCCESS) { 3613 gen_localsid_on_err = FALSE; 3614 goto out; 3615 } 3616 } 3617 3618 /* Use unixname to evaluate local name-based mapping rules */ 3619 retcode = name_based_mapping_pid2sid(db, cache, req->id1name, is_user, 3620 req, res); 3621 if (retcode == IDMAP_ERR_NOTFOUND) { 3622 retcode = generate_localsid(req, res, is_user); 3623 gen_localsid_on_err = FALSE; 3624 } 3625 3626 out: 3627 res->retcode = idmap_stat4prot(retcode); 3628 if (res->retcode != IDMAP_SUCCESS) { 3629 req->direction = _IDMAP_F_DONE; 3630 if (gen_localsid_on_err == TRUE) 3631 (void) generate_localsid(req, res, is_user); 3632 } 3633 if (!ARE_WE_DONE(req->direction)) 3634 state->pid2sid_done = FALSE; 3635 return (retcode); 3636 } 3637 3638 static 3639 idmap_retcode 3640 ad_lookup_by_sid(lookup_state_t *state, 3641 const char *sidprefix, idmap_rid_t rid, int eunixtype, 3642 char **name, char **domain, int *type, char **unixname) 3643 { 3644 int retries = 0; 3645 idmap_query_state_t *qs = NULL; 3646 idmap_retcode rc, retcode; 3647 3648 retry: 3649 retcode = idmap_lookup_batch_start(_idmapdstate.ad, 1, &qs); 3650 if (retcode != IDMAP_SUCCESS) { 3651 degrade_svc(); 3652 idmapdlog(LOG_ERR, 3653 "Failed to create request for AD lookup by SID"); 3654 return (retcode); 3655 } 3656 3657 restore_svc(); 3658 3659 if (state != NULL) 3660 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 3661 state->ad_unixgroup_attr); 3662 3663 retcode = idmap_sid2name_batch_add1(qs, sidprefix, &rid, eunixtype, 3664 name, domain, type, unixname, &rc); 3665 3666 if (retcode != IDMAP_SUCCESS) 3667 idmap_lookup_release_batch(&qs); 3668 else 3669 retcode = idmap_lookup_batch_end(&qs, NULL); 3670 3671 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 3672 goto retry; 3673 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 3674 degrade_svc(); 3675 3676 if (retcode != IDMAP_SUCCESS) { 3677 idmapdlog(LOG_NOTICE, "AD lookup by SID failed"); 3678 return (retcode); 3679 } 3680 return (rc); 3681 } 3682 3683 static 3684 int 3685 copy_mapping_request(idmap_mapping *mapping, idmap_mapping *request) 3686 { 3687 (void) memset(mapping, 0, sizeof (*mapping)); 3688 3689 mapping->flag = request->flag; 3690 mapping->direction = _IDMAP_F_DONE; 3691 mapping->id2.idtype = request->id2.idtype; 3692 3693 mapping->id1.idtype = request->id1.idtype; 3694 if (IS_REQUEST_SID(*request, 1)) { 3695 mapping->id1.idmap_id_u.sid.rid = 3696 request->id1.idmap_id_u.sid.rid; 3697 if (!EMPTY_STRING(request->id1.idmap_id_u.sid.prefix)) { 3698 mapping->id1.idmap_id_u.sid.prefix = 3699 strdup(request->id1.idmap_id_u.sid.prefix); 3700 if (mapping->id1.idmap_id_u.sid.prefix == NULL) 3701 goto errout; 3702 } 3703 } else { 3704 mapping->id1.idmap_id_u.uid = request->id1.idmap_id_u.uid; 3705 } 3706 3707 if (!EMPTY_STRING(request->id1domain)) { 3708 mapping->id1domain = strdup(request->id1domain); 3709 if (mapping->id1domain == NULL) 3710 goto errout; 3711 } 3712 3713 if (!EMPTY_STRING(request->id1name)) { 3714 mapping->id1name = strdup(request->id1name); 3715 if (mapping->id1name == NULL) 3716 goto errout; 3717 } 3718 3719 /* We don't need the rest of the request i.e request->id2 */ 3720 return (0); 3721 3722 errout: 3723 if (mapping->id1.idmap_id_u.sid.prefix != NULL) 3724 free(mapping->id1.idmap_id_u.sid.prefix); 3725 if (mapping->id1domain != NULL) 3726 free(mapping->id1domain); 3727 if (mapping->id1name != NULL) 3728 free(mapping->id1name); 3729 3730 (void) memset(mapping, 0, sizeof (*mapping)); 3731 return (-1); 3732 } 3733 3734 3735 idmap_retcode 3736 get_w2u_mapping(sqlite *cache, sqlite *db, idmap_mapping *request, 3737 idmap_mapping *mapping) 3738 { 3739 idmap_id_res idres; 3740 lookup_state_t state; 3741 char *cp; 3742 idmap_retcode retcode; 3743 const char *winname, *windomain; 3744 3745 (void) memset(&idres, 0, sizeof (idres)); 3746 (void) memset(&state, 0, sizeof (state)); 3747 3748 /* Get directory-based name mapping info */ 3749 retcode = get_ds_namemap_type(&state); 3750 if (retcode != IDMAP_SUCCESS) 3751 goto out; 3752 3753 /* 3754 * Copy data from "request" to "mapping". Note that 3755 * empty strings are not copied from "request" to 3756 * "mapping" and therefore the coresponding strings in 3757 * "mapping" will be NULL. This eliminates having to 3758 * check for empty strings henceforth. 3759 */ 3760 if (copy_mapping_request(mapping, request) < 0) { 3761 retcode = IDMAP_ERR_MEMORY; 3762 goto out; 3763 } 3764 3765 winname = mapping->id1name; 3766 windomain = mapping->id1domain; 3767 3768 if (winname == NULL && windomain != NULL) { 3769 retcode = IDMAP_ERR_ARG; 3770 goto out; 3771 } 3772 3773 /* Need atleast winname or sid to proceed */ 3774 if (winname == NULL && mapping->id1.idmap_id_u.sid.prefix == NULL) { 3775 retcode = IDMAP_ERR_ARG; 3776 goto out; 3777 } 3778 3779 /* 3780 * If domainname is not given but we have a fully qualified 3781 * winname then extract the domainname from the winname, 3782 * otherwise use the default_domain from the config 3783 */ 3784 if (winname != NULL && windomain == NULL) { 3785 retcode = IDMAP_SUCCESS; 3786 if ((cp = strchr(winname, '@')) != NULL) { 3787 *cp = '\0'; 3788 mapping->id1domain = strdup(cp + 1); 3789 if (mapping->id1domain == NULL) 3790 retcode = IDMAP_ERR_MEMORY; 3791 } else if (lookup_wksids_name2sid(winname, NULL, NULL, NULL, 3792 NULL) != IDMAP_SUCCESS) { 3793 /* well-known SIDs don't need domain */ 3794 RDLOCK_CONFIG(); 3795 if (_idmapdstate.cfg->pgcfg.default_domain != NULL) { 3796 mapping->id1domain = 3797 strdup(_idmapdstate.cfg-> 3798 pgcfg.default_domain); 3799 if (mapping->id1domain == NULL) 3800 retcode = IDMAP_ERR_MEMORY; 3801 } else { 3802 retcode = IDMAP_ERR_DOMAIN_NOTFOUND; 3803 } 3804 UNLOCK_CONFIG(); 3805 } 3806 if (retcode != IDMAP_SUCCESS) 3807 goto out; 3808 } 3809 3810 /* 3811 * First pass looks up the well-known SIDs table and cache 3812 * and handles localSIDs 3813 */ 3814 state.sid2pid_done = TRUE; 3815 retcode = sid2pid_first_pass(&state, cache, mapping, &idres); 3816 if (IDMAP_ERROR(retcode) || state.sid2pid_done == TRUE) 3817 goto out; 3818 3819 /* AD lookup by winname or by sid */ 3820 if (state.ad_nqueries > 0) { 3821 retcode = ad_lookup(&state, mapping, &idres, 1, 1, 0); 3822 if (IDMAP_ERROR(retcode)) 3823 goto out; 3824 } 3825 3826 /* 3827 * If nldap-based name mapping is enabled then lookup native LDAP 3828 * directory service by winname to get pid and unixname. Ignore 3829 * non-fatal errors in which case we simply fallback to evaluating 3830 * local name-based mapping rules. 3831 */ 3832 if (mapping->id1name != NULL && NLDAP_MODE(idres.id.idtype, (&state))) { 3833 retcode = nldap_lookup(mapping, &idres, 1, 1); 3834 if (IDMAP_FATAL_ERROR(retcode)) 3835 goto out; 3836 idres.retcode = IDMAP_SUCCESS; 3837 } 3838 3839 /* Next pass performs name-based mapping and ephemeral mapping. */ 3840 state.sid2pid_done = TRUE; 3841 retcode = sid2pid_second_pass(&state, cache, db, mapping, &idres); 3842 if (IDMAP_ERROR(retcode) || state.sid2pid_done == TRUE) 3843 goto out; 3844 3845 /* Update cache */ 3846 (void) update_cache_sid2pid(&state, cache, mapping, &idres); 3847 3848 out: 3849 /* 3850 * Note that "mapping" is returned to the client. Therefore 3851 * copy whatever we have in "idres" to mapping->id2 and 3852 * free idres. 3853 */ 3854 mapping->direction = idres.direction; 3855 mapping->id2 = idres.id; 3856 (void) memset(&idres, 0, sizeof (idres)); 3857 if (retcode != IDMAP_SUCCESS) 3858 mapping->id2.idmap_id_u.uid = UID_NOBODY; 3859 xdr_free(xdr_idmap_id_res, (caddr_t)&idres); 3860 cleanup_lookup_state(&state); 3861 return (retcode); 3862 } 3863 3864 idmap_retcode 3865 get_u2w_mapping(sqlite *cache, sqlite *db, idmap_mapping *request, 3866 idmap_mapping *mapping, int is_user) 3867 { 3868 idmap_id_res idres; 3869 lookup_state_t state; 3870 idmap_retcode retcode; 3871 char *canonname; 3872 int is_wuser; 3873 3874 /* 3875 * In order to re-use the pid2sid code, we convert 3876 * our input data into structs that are expected by 3877 * pid2sid_first_pass. 3878 */ 3879 3880 (void) memset(&idres, 0, sizeof (idres)); 3881 (void) memset(&state, 0, sizeof (state)); 3882 3883 /* Get directory-based name mapping info */ 3884 retcode = get_ds_namemap_type(&state); 3885 if (retcode != IDMAP_SUCCESS) 3886 goto out; 3887 3888 /* 3889 * Copy data from "request" to "mapping". Note that 3890 * empty strings are not copied from "request" to 3891 * "mapping" and therefore the coresponding strings in 3892 * "mapping" will be NULL. This eliminates having to 3893 * check for empty strings henceforth. 3894 */ 3895 if (copy_mapping_request(mapping, request) < 0) { 3896 retcode = IDMAP_ERR_MEMORY; 3897 goto out; 3898 } 3899 3900 /* 3901 * For unix to windows mapping request, we need atleast a 3902 * unixname or uid/gid to proceed 3903 */ 3904 if (mapping->id1name == NULL && 3905 mapping->id1.idmap_id_u.uid == SENTINEL_PID) { 3906 retcode = IDMAP_ERR_ARG; 3907 goto out; 3908 } 3909 3910 /* First pass looks up cache and well-known SIDs */ 3911 state.pid2sid_done = TRUE; 3912 retcode = pid2sid_first_pass(&state, cache, mapping, &idres, 3913 is_user, 1); 3914 if (IDMAP_ERROR(retcode) || state.pid2sid_done == TRUE) 3915 goto out; 3916 3917 if (state.nldap_nqueries > 0) { 3918 /* 3919 * This means directory-based name mapping (nldap or mixed 3920 * mode) is enabled. Lookup native LDAP directory service 3921 * by unixname or pid to get the winname. Ignore non-fatal 3922 * errors in which case we simply fallback to local name 3923 * based mapping rules. 3924 */ 3925 retcode = nldap_lookup(mapping, &idres, 0, 0); 3926 if (IDMAP_FATAL_ERROR(retcode)) 3927 goto out; 3928 idres.retcode = IDMAP_SUCCESS; 3929 3930 /* 3931 * If we've winname then get SID. We use lookup_name2sid() 3932 * instead of ad_lookup() in order to first resolve name2sid 3933 * using well-known SIDs table and name_cache before trying 3934 * AD. 3935 */ 3936 if (mapping->id2name != NULL) { 3937 canonname = NULL; 3938 is_wuser = -1; 3939 retcode = lookup_name2sid(cache, mapping->id2name, 3940 mapping->id2domain, &is_wuser, &canonname, 3941 &idres.id.idmap_id_u.sid.prefix, 3942 &idres.id.idmap_id_u.sid.rid, mapping); 3943 if (canonname != NULL) { 3944 free(mapping->id2name); 3945 mapping->id2name = canonname; 3946 } 3947 if (retcode == IDMAP_SUCCESS) 3948 idres.id.idtype = is_wuser ? IDMAP_USID : 3949 IDMAP_GSID; 3950 idres.retcode = retcode; 3951 } 3952 } else if (state.ad_nqueries > 0) { 3953 /* 3954 * This means AD-based name mapping is enabled. 3955 * Lookup AD by unixname to get winname and sid. 3956 * Ignore non-fatal errors in which case we simply fallback 3957 * to local name based mapping rules. 3958 */ 3959 retcode = ad_lookup(&state, mapping, &idres, 0, 0, 1); 3960 if (IDMAP_FATAL_ERROR(retcode)) 3961 goto out; 3962 idres.retcode = IDMAP_SUCCESS; 3963 } 3964 3965 /* 3966 * Next pass processes the result of the preceding passes/lookups. 3967 * It returns if there's nothing more to be done otherwise it 3968 * evaluates local name-based mapping rules 3969 */ 3970 state.pid2sid_done = TRUE; 3971 retcode = pid2sid_second_pass(&state, cache, db, mapping, &idres, 3972 is_user); 3973 if (IDMAP_ERROR(retcode) || state.pid2sid_done == TRUE) 3974 goto out; 3975 3976 /* Update cache */ 3977 (void) update_cache_pid2sid(&state, cache, mapping, &idres); 3978 3979 out: 3980 /* 3981 * Note that "mapping" is returned to the client. Therefore 3982 * copy whatever we have in "idres" to mapping->id2 and 3983 * free idres. 3984 */ 3985 mapping->direction = idres.direction; 3986 mapping->id2 = idres.id; 3987 (void) memset(&idres, 0, sizeof (idres)); 3988 xdr_free(xdr_idmap_id_res, (caddr_t)&idres); 3989 cleanup_lookup_state(&state); 3990 return (retcode); 3991 } 3992 3993 static 3994 idmap_retcode 3995 ad_lookup_by_unixname(lookup_state_t *state, 3996 const char *unixname, int is_user, int is_wuser, 3997 char **sidprefix, idmap_rid_t *rid, char **winname, 3998 char **domain, int *type) 3999 { 4000 /* Lookup AD by unixname */ 4001 int retries = 0; 4002 idmap_query_state_t *qs = NULL; 4003 idmap_retcode rc, retcode; 4004 4005 retry: 4006 retcode = idmap_lookup_batch_start(_idmapdstate.ad, 1, &qs); 4007 if (retcode != IDMAP_SUCCESS) { 4008 degrade_svc(); 4009 idmapdlog(LOG_ERR, 4010 "Failed to create request for AD lookup by unixname"); 4011 return (IDMAP_ERR_INTERNAL); 4012 } 4013 4014 restore_svc(); 4015 4016 if (state != NULL) 4017 idmap_lookup_batch_set_unixattr(qs, state->ad_unixuser_attr, 4018 state->ad_unixgroup_attr); 4019 4020 retcode = idmap_unixname2sid_batch_add1(qs, unixname, is_user, 4021 is_wuser, sidprefix, rid, winname, domain, type, &rc); 4022 4023 if (retcode != IDMAP_SUCCESS) 4024 idmap_lookup_release_batch(&qs); 4025 else 4026 retcode = idmap_lookup_batch_end(&qs, NULL); 4027 4028 if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR && retries++ < 2) 4029 goto retry; 4030 else if (retcode == IDMAP_ERR_RETRIABLE_NET_ERR) 4031 degrade_svc(); 4032 4033 if (retcode != IDMAP_SUCCESS) { 4034 idmapdlog(LOG_NOTICE, "AD lookup by unixname failed"); 4035 return (retcode); 4036 } 4037 return (rc); 4038 } 4039 4040 /* 4041 * This function is called whenever a non-batched AD lookup needs to be 4042 * done (e.g. get_w2u_mapping() and get_u2w_mapping()). It's already 4043 * determined by the caller before calling this function that AD lookup is 4044 * needed and has already searched the well-known SIDs table and name_cache. 4045 */ 4046 static 4047 idmap_retcode 4048 ad_lookup(lookup_state_t *state, idmap_mapping *req, idmap_id_res *res, 4049 int w2u, int getunixattr, int byunixattr) 4050 { 4051 idmap_retcode retcode; 4052 int type, eunixtype, is_user, is_wuser; 4053 char *canonname = NULL; 4054 4055 if (w2u) { 4056 /* 4057 * win2unix lookup requests (get_w2u_mapping()) calls this 4058 * function to lookup by sid OR winname and to retrieve 4059 * SID, winname, sidtype (user or group) and unixnames 4060 * from AD. 4061 */ 4062 4063 /* Set the expected unixtype */ 4064 if (res->id.idtype == IDMAP_UID) 4065 eunixtype = _IDMAP_T_USER; 4066 else if (res->id.idtype == IDMAP_GID) 4067 eunixtype = _IDMAP_T_GROUP; 4068 else 4069 eunixtype = _IDMAP_T_UNDEF; 4070 4071 if (req->id1.idmap_id_u.sid.prefix != NULL) { 4072 /* AD lookup by sid */ 4073 retcode = ad_lookup_by_sid( 4074 state, req->id1.idmap_id_u.sid.prefix, 4075 req->id1.idmap_id_u.sid.rid, eunixtype, 4076 (req->id1name == NULL) ? &req->id1name : NULL, 4077 (req->id1domain == NULL) ? &req->id1domain : NULL, 4078 &type, (getunixattr && req->id2name == NULL) 4079 ? &req->id2name : NULL); 4080 } else { 4081 assert(req->id1name != NULL); 4082 /* AD lookup by winname */ 4083 retcode = ad_lookup_by_winname( 4084 state, req->id1name, req->id1domain, eunixtype, 4085 &canonname, &req->id1.idmap_id_u.sid.prefix, 4086 &req->id1.idmap_id_u.sid.rid, &type, 4087 (getunixattr && req->id2name == NULL) 4088 ? &req->id2name : NULL); 4089 4090 if (canonname != NULL) { 4091 free(req->id1name); 4092 req->id1name = canonname; 4093 } 4094 } 4095 if (retcode == IDMAP_SUCCESS) { 4096 switch (type) { 4097 case _IDMAP_T_USER: 4098 if (res->id.idtype == IDMAP_POSIXID) 4099 res->id.idtype = IDMAP_UID; 4100 req->id1.idtype = IDMAP_USID; 4101 break; 4102 case _IDMAP_T_GROUP: 4103 if (res->id.idtype == IDMAP_POSIXID) 4104 res->id.idtype = IDMAP_GID; 4105 req->id1.idtype = IDMAP_GSID; 4106 break; 4107 default: 4108 return (IDMAP_ERR_SID); 4109 } 4110 } 4111 return (retcode); 4112 } 4113 4114 /* 4115 * unix2win lookup requests (get_u2w_mapping()) calls this 4116 * function to lookup AD by unixname and to retrieve 4117 * SID, winname, and sidtype (user or group) from AD. 4118 */ 4119 4120 /* Set the expected unixtype */ 4121 eunixtype = (req->id1.idtype == IDMAP_UID) ? _IDMAP_T_USER : 4122 _IDMAP_T_GROUP; 4123 4124 if (byunixattr) { 4125 /* AD lookup by unixname */ 4126 is_user = (IS_REQUEST_UID(*req)) ? 1 : 0; 4127 if (res->id.idtype == IDMAP_USID) 4128 is_wuser = 1; 4129 else if (res->id.idtype == IDMAP_GSID) 4130 is_wuser = 0; 4131 else 4132 is_wuser = is_user; 4133 retcode = ad_lookup_by_unixname( 4134 state, req->id1name, is_user, is_wuser, 4135 (res->id.idmap_id_u.sid.prefix == NULL) ? 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.rid : NULL, 4139 (req->id2name == NULL) ? &req->id2name : NULL, 4140 (req->id2domain == NULL) ? &req->id2domain : NULL, NULL); 4141 } else if (res->id.idmap_id_u.sid.prefix != NULL) { 4142 /* AD lookup by sid */ 4143 retcode = ad_lookup_by_sid( 4144 state, res->id.idmap_id_u.sid.prefix, 4145 res->id.idmap_id_u.sid.rid, eunixtype, 4146 (req->id2name == NULL) ? &req->id2name : NULL, 4147 (req->id2domain == NULL) ? &req->id2domain : NULL, 4148 NULL, (getunixattr && req->id1name == NULL) 4149 ? &req->id1name : NULL); 4150 } else { 4151 /* AD lookup by winname */ 4152 assert(req->id2name != NULL); 4153 retcode = ad_lookup_by_winname( 4154 state, req->id2name, req->id2domain, eunixtype, 4155 &canonname, &res->id.idmap_id_u.sid.prefix, 4156 &res->id.idmap_id_u.sid.rid, NULL, 4157 (getunixattr && req->id1name == NULL) 4158 ? &req->id1name : NULL); 4159 4160 if (canonname != NULL) { 4161 free(req->id2name); 4162 req->id2name = canonname; 4163 } 4164 } 4165 4166 if (retcode == IDMAP_SUCCESS) { 4167 switch (type) { 4168 case _IDMAP_T_USER: 4169 if (res->id.idtype == IDMAP_SID) 4170 res->id.idtype = IDMAP_USID; 4171 break; 4172 case _IDMAP_T_GROUP: 4173 if (res->id.idtype == IDMAP_SID) 4174 res->id.idtype = IDMAP_GSID; 4175 break; 4176 default: 4177 return (IDMAP_ERR_SID); 4178 } 4179 } 4180 return (retcode); 4181 } 4182