source3/passdb/secrets.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Copyright (C) Andrew Tridgell 1992-2001
   4    Copyright (C) Andrew Bartlett      2002
   5    Copyright (C) Rafal Szczesniak     2002
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 /* the Samba secrets database stores any generated, private information
  23    such as the local SID and machine trust password */
  24
  25 #include "includes.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_PASSDB
  29
  30 static TDB_CONTEXT *tdb;
  31
  32 /* open up the secrets database */
  33 BOOL secrets_init(void)
  34 {
  35         pstring fname;
  36
  37         if (tdb)
  38                 return True;
  39
  40         pstrcpy(fname, lp_private_dir());
  41         pstrcat(fname,"/secrets.tdb");
  42
  43         tdb = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
  44
  45         if (!tdb) {
  46                 DEBUG(0,("Failed to open %s\n", fname));
  47                 return False;
  48         }
  49         return True;
  50 }
  51
  52 /* read a entry from the secrets database - the caller must free the result
  53    if size is non-null then the size of the entry is put in there
  54  */
  55 void *secrets_fetch(const char *key, size_t *size)
  56 {
  57         TDB_DATA kbuf, dbuf;
  58         secrets_init();
  59         if (!tdb)
  60                 return NULL;
  61         kbuf.dptr = key;
  62         kbuf.dsize = strlen(key);
  63         dbuf = tdb_fetch(tdb, kbuf);
  64         if (size)
  65                 *size = dbuf.dsize;
  66         return dbuf.dptr;
  67 }
  68
  69 /* store a secrets entry
  70  */
  71 BOOL secrets_store(const char *key, const void *data, size_t size)
  72 {
  73         TDB_DATA kbuf, dbuf;
  74         secrets_init();
  75         if (!tdb)
  76                 return False;
  77         kbuf.dptr = key;
  78         kbuf.dsize = strlen(key);
  79         dbuf.dptr = data;
  80         dbuf.dsize = size;
  81         return tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) == 0;
  82 }
  83
  84
  85 /* delete a secets database entry
  86  */
  87 BOOL secrets_delete(const char *key)
  88 {
  89         TDB_DATA kbuf;
  90         secrets_init();
  91         if (!tdb)
  92                 return False;
  93         kbuf.dptr = key;
  94         kbuf.dsize = strlen(key);
  95         return tdb_delete(tdb, kbuf) == 0;
  96 }
  97
  98 BOOL secrets_store_domain_sid(const char *domain, const DOM_SID *sid)
  99 {
 100         fstring key;
 101
 102         slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
 103         strupper_m(key);
 104         return secrets_store(key, sid, sizeof(DOM_SID));
 105 }
 106
 107 BOOL secrets_fetch_domain_sid(const char *domain, DOM_SID *sid)
 108 {
 109         DOM_SID *dyn_sid;
 110         fstring key;
 111         size_t size;
 112
 113         slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
 114         strupper_m(key);
 115         dyn_sid = (DOM_SID *)secrets_fetch(key, &size);
 116
 117         if (dyn_sid == NULL)
 118                 return False;
 119
 120         if (size != sizeof(DOM_SID))
 121         {
 122                 SAFE_FREE(dyn_sid);
 123                 return False;
 124         }
 125
 126         *sid = *dyn_sid;
 127         SAFE_FREE(dyn_sid);
 128         return True;
 129 }
 130
 131 BOOL secrets_store_domain_guid(const char *domain, GUID *guid)
 132 {
 133         fstring key;
 134
 135         slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
 136         strupper_m(key);
 137         return secrets_store(key, guid, sizeof(GUID));
 138 }
 139
 140 BOOL secrets_fetch_domain_guid(const char *domain, GUID *guid)
 141 {
 142         GUID *dyn_guid;
 143         fstring key;
 144         size_t size;
 145         GUID new_guid;
 146
 147         slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
 148         strupper_m(key);
 149         dyn_guid = (GUID *)secrets_fetch(key, &size);
 150
 151         DEBUG(6,("key is %s, size is %d\n", key, (int)size));
 152
 153         if ((NULL == dyn_guid) && (ROLE_DOMAIN_PDC == lp_server_role())) {
 154                 smb_uuid_generate_random(&new_guid);
 155                 if (!secrets_store_domain_guid(domain, &new_guid))
 156                         return False;
 157                 dyn_guid = (GUID *)secrets_fetch(key, &size);
 158                 if (dyn_guid == NULL)
 159                         return False;
 160         }
 161
 162         if (size != sizeof(GUID))
 163         {
 164                 SAFE_FREE(dyn_guid);
 165                 return False;
 166         }
 167
 168         *guid = *dyn_guid;
 169         SAFE_FREE(dyn_guid);
 170         return True;
 171 }
 172
 173 /**
 174  * Form a key for fetching the machine trust account password
 175  *
 176  * @param domain domain name
 177  *
 178  * @return stored password's key
 179  **/
 180 const char *trust_keystr(const char *domain)
 181 {
 182         static fstring keystr;
 183
 184         slprintf(keystr,sizeof(keystr)-1,"%s/%s",
 185                  SECRETS_MACHINE_ACCT_PASS, domain);
 186         strupper_m(keystr);
 187
 188         return keystr;
 189 }
 190
 191 /**
 192  * Form a key for fetching a trusted domain password
 193  *
 194  * @param domain trusted domain name
 195  *
 196  * @return stored password's key
 197  **/
 198 static char *trustdom_keystr(const char *domain)
 199 {
 200         static pstring keystr;
 201
 202         pstr_sprintf(keystr, "%s/%s", SECRETS_DOMTRUST_ACCT_PASS, domain);
 203         strupper_m(keystr);
 204
 205         return keystr;
 206 }
 207
 208 /************************************************************************
 209  Lock the trust password entry.
 210 ************************************************************************/
 211
 212 BOOL secrets_lock_trust_account_password(const char *domain, BOOL dolock)
 213 {
 214         if (!tdb)
 215                 return False;
 216
 217         if (dolock)
 218                 return (tdb_lock_bystring(tdb, trust_keystr(domain),0) == 0);
 219         else
 220                 tdb_unlock_bystring(tdb, trust_keystr(domain));
 221         return True;
 222 }
 223
 224 /************************************************************************
 225  Routine to get the default secure channel type for trust accounts
 226 ************************************************************************/
 227
 228 uint32 get_default_sec_channel(void)
 229 {
 230         if (lp_server_role() == ROLE_DOMAIN_BDC ||
 231             lp_server_role() == ROLE_DOMAIN_PDC) {
 232                 return SEC_CHAN_BDC;
 233         } else {
 234                 return SEC_CHAN_WKSTA;
 235         }
 236 }
 237
 238 /************************************************************************
 239  Routine to get the trust account password for a domain.
 240  The user of this function must have locked the trust password file using
 241  the above call.
 242 ************************************************************************/
 243
 244 BOOL secrets_fetch_trust_account_password(const char *domain, uint8 ret_pwd[16],
 245                                           time_t *pass_last_set_time,
 246                                           uint32 *channel)
 247 {
 248         struct machine_acct_pass *pass;
 249         char *plaintext;
 250         size_t size;
 251
 252         plaintext = secrets_fetch_machine_password(domain, pass_last_set_time,
 253                                                    channel);
 254         if (plaintext) {
 255                 DEBUG(4,("Using cleartext machine password\n"));
 256                 E_md4hash(plaintext, ret_pwd);
 257                 SAFE_FREE(plaintext);
 258                 return True;
 259         }
 260
 261         if (!(pass = secrets_fetch(trust_keystr(domain), &size))) {
 262                 DEBUG(5, ("secrets_fetch failed!\n"));
 263                 return False;
 264         }
 265
 266         if (size != sizeof(*pass)) {
 267                 DEBUG(0, ("secrets were of incorrect size!\n"));
 268                 return False;
 269         }
 270
 271         if (pass_last_set_time) *pass_last_set_time = pass->mod_time;
 272         memcpy(ret_pwd, pass->hash, 16);
 273         SAFE_FREE(pass);
 274
 275         if (channel)
 276                 *channel = get_default_sec_channel();
 277
 278         return True;
 279 }
 280
 281 /************************************************************************
 282  Routine to get account password to trusted domain
 283 ************************************************************************/
 284
 285 BOOL secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
 286                                            DOM_SID *sid, time_t *pass_last_set_time)
 287 {
 288         struct trusted_dom_pass pass;
 289         size_t size;
 290
 291         /* unpacking structures */
 292         char* pass_buf;
 293         int pass_len = 0;
 294
 295         ZERO_STRUCT(pass);
 296
 297         /* fetching trusted domain password structure */
 298         if (!(pass_buf = secrets_fetch(trustdom_keystr(domain), &size))) {
 299                 DEBUG(5, ("secrets_fetch failed!\n"));
 300                 return False;
 301         }
 302
 303         /* unpack trusted domain password */
 304         pass_len = tdb_trusted_dom_pass_unpack(pass_buf, size, &pass);
 305         SAFE_FREE(pass_buf);
 306
 307         if (pass_len != size) {
 308                 DEBUG(5, ("Invalid secrets size. Unpacked data doesn't match trusted_dom_pass structure.\n"));
 309                 return False;
 310         }
 311
 312         /* the trust's password */
 313         if (pwd) {
 314                 *pwd = strdup(pass.pass);
 315                 if (!*pwd) {
 316                         return False;
 317                 }
 318         }
 319
 320         /* last change time */
 321         if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
 322
 323         /* domain sid */
 324         sid_copy(sid, &pass.domain_sid);
 325
 326         return True;
 327 }
 328
 329 /************************************************************************
 330  Routine to set the trust account password for a domain.
 331 ************************************************************************/
 332
 333 BOOL secrets_store_trust_account_password(const char *domain, uint8 new_pwd[16])
 334 {
 335         struct machine_acct_pass pass;
 336
 337         pass.mod_time = time(NULL);
 338         memcpy(pass.hash, new_pwd, 16);
 339
 340         return secrets_store(trust_keystr(domain), (void *)&pass, sizeof(pass));
 341 }
 342
 343 /**
 344  * Routine to store the password for trusted domain
 345  *
 346  * @param domain remote domain name
 347  * @param pwd plain text password of trust relationship
 348  * @param sid remote domain sid
 349  *
 350  * @return true if succeeded
 351  **/
 352
 353 BOOL secrets_store_trusted_domain_password(const char* domain, smb_ucs2_t *uni_dom_name,
 354                                            size_t uni_name_len, const char* pwd,
 355                                            DOM_SID sid)
 356 {
 357         /* packing structures */
 358         pstring pass_buf;
 359         int pass_len = 0;
 360         int pass_buf_len = sizeof(pass_buf);
 361
 362         struct trusted_dom_pass pass;
 363         ZERO_STRUCT(pass);
 364
 365         /* unicode domain name and its length */
 366         if (!uni_dom_name)
 367                 return False;
 368
 369         strncpy_w(pass.uni_name, uni_dom_name, sizeof(pass.uni_name) - 1);
 370         pass.uni_name_len = uni_name_len;
 371
 372         /* last change time */
 373         pass.mod_time = time(NULL);
 374
 375         /* password of the trust */
 376         pass.pass_len = strlen(pwd);
 377         fstrcpy(pass.pass, pwd);
 378
 379         /* domain sid */
 380         sid_copy(&pass.domain_sid, &sid);
 381
 382         pass_len = tdb_trusted_dom_pass_pack(pass_buf, pass_buf_len, &pass);
 383
 384         return secrets_store(trustdom_keystr(domain), (void *)&pass_buf, pass_len);
 385 }
 386
 387 /************************************************************************
 388  Routine to set the plaintext machine account password for a realm
 389 the password is assumed to be a null terminated ascii string
 390 ************************************************************************/
 391
 392 BOOL secrets_store_machine_password(const char *pass, const char *domain, uint32 sec_channel)
 393 {
 394         char *key = NULL;
 395         BOOL ret;
 396         uint32 last_change_time;
 397         uint32 sec_channel_type;
 398
 399         asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, domain);
 400         if (!key)
 401                 return False;
 402         strupper_m(key);
 403
 404         ret = secrets_store(key, pass, strlen(pass)+1);
 405         SAFE_FREE(key);
 406
 407         if (!ret)
 408                 return ret;
 409
 410         asprintf(&key, "%s/%s", SECRETS_MACHINE_LAST_CHANGE_TIME, domain);
 411         if (!key)
 412                 return False;
 413         strupper_m(key);
 414
 415         SIVAL(&last_change_time, 0, time(NULL));
 416         ret = secrets_store(key, &last_change_time, sizeof(last_change_time));
 417         SAFE_FREE(key);
 418
 419         asprintf(&key, "%s/%s", SECRETS_MACHINE_SEC_CHANNEL_TYPE, domain);
 420         if (!key)
 421                 return False;
 422         strupper_m(key);
 423
 424         SIVAL(&sec_channel_type, 0, sec_channel);
 425         ret = secrets_store(key, &sec_channel_type, sizeof(sec_channel_type));
 426         SAFE_FREE(key);
 427
 428         return ret;
 429 }
 430
 431
 432 /************************************************************************
 433  Routine to fetch the plaintext machine account password for a realm
 434 the password is assumed to be a null terminated ascii string
 435 ************************************************************************/
 436 char *secrets_fetch_machine_password(const char *domain,
 437                                      time_t *pass_last_set_time,
 438                                      uint32 *channel)
 439 {
 440         char *key = NULL;
 441         char *ret;
 442         asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, domain);
 443         strupper_m(key);
 444         ret = (char *)secrets_fetch(key, NULL);
 445         SAFE_FREE(key);
 446
 447         if (pass_last_set_time) {
 448                 size_t size;
 449                 uint32 *last_set_time;
 450                 asprintf(&key, "%s/%s", SECRETS_MACHINE_LAST_CHANGE_TIME, domain);
 451                 strupper_m(key);
 452                 last_set_time = secrets_fetch(key, &size);
 453                 if (last_set_time) {
 454                         *pass_last_set_time = IVAL(last_set_time,0);
 455                         SAFE_FREE(last_set_time);
 456                 } else {
 457                         *pass_last_set_time = 0;
 458                 }
 459                 SAFE_FREE(key);
 460         }
 461
 462         if (channel) {
 463                 size_t size;
 464                 uint32 *channel_type;
 465                 asprintf(&key, "%s/%s", SECRETS_MACHINE_SEC_CHANNEL_TYPE, domain);
 466                 strupper_m(key);
 467                 channel_type = secrets_fetch(key, &size);
 468                 if (channel_type) {
 469                         *channel = IVAL(channel_type,0);
 470                         SAFE_FREE(channel_type);
 471                 } else {
 472                         *channel = get_default_sec_channel();
 473                 }
 474                 SAFE_FREE(key);
 475         }
 476
 477         return ret;
 478 }
 479
 480
 481
 482 /************************************************************************
 483  Routine to delete the machine trust account password file for a domain.
 484 ************************************************************************/
 485
 486 BOOL trust_password_delete(const char *domain)
 487 {
 488         return secrets_delete(trust_keystr(domain));
 489 }
 490
 491 /************************************************************************
 492  Routine to delete the password for trusted domain
 493 ************************************************************************/
 494
 495 BOOL trusted_domain_password_delete(const char *domain)
 496 {
 497         return secrets_delete(trustdom_keystr(domain));
 498 }
 499
 500
 501 /*******************************************************************
 502  Reset the 'done' variables so after a client process is created
 503  from a fork call these calls will be re-done. This should be
 504  expanded if more variables need reseting.
 505  ******************************************************************/
 506
 507 void reset_globals_after_fork(void)
 508 {
 509         unsigned char dummy;
 510
 511         secrets_init();
 512
 513         /*
 514          * Increment the global seed value to ensure every smbd starts
 515          * with a new random seed.
 516          */
 517
 518         if (tdb) {
 519                 uint32 initial_val = sys_getpid();
 520                 tdb_change_int32_atomic(tdb, "INFO/random_seed", (int *)&initial_val, 1);
 521                 set_rand_reseed_data((unsigned char *)&initial_val, sizeof(initial_val));
 522         }
 523
 524         /*
 525          * Re-seed the random crypto generator, so all smbd's
 526          * started from the same parent won't generate the same
 527          * sequence.
 528          */
 529         generate_random_buffer( &dummy, 1, True);
 530 }
 531
 532 BOOL secrets_store_ldap_pw(const char* dn, char* pw)
 533 {
 534         char *key = NULL;
 535         BOOL ret;
 536
 537         if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
 538                 DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
 539                 return False;
 540         }
 541
 542         ret = secrets_store(key, pw, strlen(pw)+1);
 543
 544         SAFE_FREE(key);
 545         return ret;
 546 }
 547
 548
 549 /**
 550  * Get trusted domains info from secrets.tdb.
 551  *
 552  * The linked list is allocated on the supplied talloc context, caller gets to destroy
 553  * when done.
 554  *
 555  * @param ctx Allocation context
 556  * @param enum_ctx Starting index, eg. we can start fetching at third
 557  *        or sixth trusted domain entry. Zero is the first index.
 558  *        Value it is set to is the enum context for the next enumeration.
 559  * @param num_domains Number of domain entries to fetch at one call
 560  * @param domains Pointer to array of trusted domain structs to be filled up
 561  *
 562  * @return nt status code of rpc response
 563  **/
 564
 565 NTSTATUS secrets_get_trusted_domains(TALLOC_CTX* ctx, int* enum_ctx, unsigned int max_num_domains, int *num_domains, TRUSTDOM ***domains)
 566 {
 567         TDB_LIST_NODE *keys, *k;
 568         TRUSTDOM *dom = NULL;
 569         char *pattern;
 570         unsigned int start_idx;
 571         uint32 idx = 0;
 572         size_t size, packed_size = 0;
 573         fstring dom_name;
 574         char *packed_pass;
 575         struct trusted_dom_pass *pass = talloc_zero(ctx, sizeof(struct trusted_dom_pass));
 576         NTSTATUS status;
 577
 578         if (!secrets_init()) return NT_STATUS_ACCESS_DENIED;
 579
 580         if (!pass) {
 581                 DEBUG(0, ("talloc_zero failed!\n"));
 582                 return NT_STATUS_NO_MEMORY;
 583         }
 584
 585         *num_domains = 0;
 586         start_idx = *enum_ctx;
 587
 588         /* generate searching pattern */
 589         if (!(pattern = talloc_asprintf(ctx, "%s/*", SECRETS_DOMTRUST_ACCT_PASS))) {
 590                 DEBUG(0, ("secrets_get_trusted_domains: talloc_asprintf() failed!\n"));
 591                 return NT_STATUS_NO_MEMORY;
 592         }
 593
 594         DEBUG(5, ("secrets_get_trusted_domains: looking for %d domains, starting at index %d\n",
 595                   max_num_domains, *enum_ctx));
 596
 597         *domains = talloc_zero(ctx, sizeof(**domains)*max_num_domains);
 598
 599         /* fetching trusted domains' data and collecting them in a list */
 600         keys = tdb_search_keys(tdb, pattern);
 601
 602         /*
 603          * if there's no keys returned ie. no trusted domain,
 604          * return "no more entries" code
 605          */
 606         status = NT_STATUS_NO_MORE_ENTRIES;
 607
 608         /* searching for keys in secrets db -- way to go ... */
 609         for (k = keys; k; k = k->next) {
 610                 char *secrets_key;
 611
 612                 /* important: ensure null-termination of the key string */
 613                 secrets_key = strndup(k->node_key.dptr, k->node_key.dsize);
 614                 if (!secrets_key) {
 615                         DEBUG(0, ("strndup failed!\n"));
 616                         return NT_STATUS_NO_MEMORY;
 617                 }
 618
 619                 packed_pass = secrets_fetch(secrets_key, &size);
 620                 packed_size = tdb_trusted_dom_pass_unpack(packed_pass, size, pass);
 621                 /* packed representation isn't needed anymore */
 622                 SAFE_FREE(packed_pass);
 623
 624                 if (size != packed_size) {
 625                         DEBUG(2, ("Secrets record %s is invalid!\n", secrets_key));
 626                         continue;
 627                 }
 628
 629                 pull_ucs2_fstring(dom_name, pass->uni_name);
 630                 DEBUG(18, ("Fetched secret record num %d.\nDomain name: %s, SID: %s\n",
 631                            idx, dom_name, sid_string_static(&pass->domain_sid)));
 632
 633                 SAFE_FREE(secrets_key);
 634
 635                 if (idx >= start_idx && idx < start_idx + max_num_domains) {
 636                         dom = talloc_zero(ctx, sizeof(*dom));
 637                         if (!dom) {
 638                                 /* free returned tdb record */
 639                                 return NT_STATUS_NO_MEMORY;
 640                         }
 641
 642                         /* copy domain sid */
 643                         SMB_ASSERT(sizeof(dom->sid) == sizeof(pass->domain_sid));
 644                         memcpy(&(dom->sid), &(pass->domain_sid), sizeof(dom->sid));
 645
 646                         /* copy unicode domain name */
 647                         dom->name = talloc_strdup_w(ctx, pass->uni_name);
 648
 649                         (*domains)[idx - start_idx] = dom;
 650
 651                         DEBUG(18, ("Secret record is in required range.\n \
 652                                    start_idx = %d, max_num_domains = %d. Added to returned array.\n",
 653                                    start_idx, max_num_domains));
 654
 655                         *enum_ctx = idx + 1;
 656                         (*num_domains)++;
 657
 658                         /* set proper status code to return */
 659                         if (k->next) {
 660                                 /* there are yet some entries to enumerate */
 661                                 status = STATUS_MORE_ENTRIES;
 662                         } else {
 663                                 /* this is the last entry in the whole enumeration */
 664                                 status = NT_STATUS_OK;
 665                         }
 666                 } else {
 667                         DEBUG(18, ("Secret is outside the required range.\n \
 668                                    start_idx = %d, max_num_domains = %d. Not added to returned array\n",
 669                                    start_idx, max_num_domains));
 670                 }
 671
 672                 idx++;
 673         }
 674
 675         DEBUG(5, ("secrets_get_trusted_domains: got %d domains\n", *num_domains));
 676
 677         /* free the results of searching the keys */
 678         tdb_search_list_free(keys);
 679
 680         return status;
 681 }
 682
 683 /*******************************************************************************
 684  Lock the secrets tdb based on a string - this is used as a primitive form of mutex
 685  between smbd instances.
 686 *******************************************************************************/
 687
 688 BOOL secrets_named_mutex(const char *name, unsigned int timeout)
 689 {
 690         int ret = 0;
 691
 692         if (!message_init())
 693                 return False;
 694
 695         ret = tdb_lock_bystring(tdb, name, timeout);
 696         if (ret == 0)
 697                 DEBUG(10,("secrets_named_mutex: got mutex for %s\n", name ));
 698
 699         return (ret == 0);
 700 }
 701
 702 /*******************************************************************************
 703  Unlock a named mutex.
 704 *******************************************************************************/
 705
 706 void secrets_named_mutex_release(const char *name)
 707 {
 708         tdb_unlock_bystring(tdb, name);
 709         DEBUG(10,("secrets_named_mutex: released mutex for %s\n", name ));
 710 }
 711
 712 /*********************************************************
 713  Check to see if we must talk to the PDC to avoid sam
 714  sync delays
 715  ********************************************************/
 716
 717 BOOL must_use_pdc( const char *domain )
 718 {
 719         time_t  now = time(NULL);
 720         time_t  last_change_time;
 721         unsigned char   passwd[16];
 722
 723         if ( !secrets_fetch_trust_account_password(domain, passwd, &last_change_time, NULL) )
 724                 return False;
 725
 726         /*
 727          * If the time the machine password has changed
 728          * was less than about 15 minutes then we need to contact
 729          * the PDC only, as we cannot be sure domain replication
 730          * has yet taken place. Bug found by Gerald (way to go
 731          * Gerald !). JRA.
 732          */
 733
 734         if ( now - last_change_time < SAM_SYNC_WINDOW )
 735                 return True;
 736
 737         return False;
 738
 739 }
 740