2 Unix SMB/CIFS implementation.
3 Copyright (C) Andrew Tridgell 1992-2001
4 Copyright (C) Andrew Bartlett 2002
5 Copyright (C) Rafal Szczesniak 2002
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.
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.
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.
22 /* the Samba secrets database stores any generated, private information
23 such as the local SID and machine trust password */
28 #define DBGC_CLASS DBGC_PASSDB
30 static TDB_CONTEXT *tdb;
32 /* open up the secrets database */
33 BOOL secrets_init(void)
40 pstrcpy(fname, lp_private_dir());
41 pstrcat(fname,"/secrets.tdb");
43 tdb = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
46 DEBUG(0,("Failed to open %s\n", fname));
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
55 void *secrets_fetch(const char *key, size_t *size)
62 kbuf.dsize = strlen(key);
63 dbuf = tdb_fetch(tdb, kbuf);
69 /* store a secrets entry
71 BOOL secrets_store(const char *key, const void *data, size_t size)
78 kbuf.dsize = strlen(key);
81 return tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) == 0;
85 /* delete a secets database entry
87 BOOL secrets_delete(const char *key)
94 kbuf.dsize = strlen(key);
95 return tdb_delete(tdb, kbuf) == 0;
98 BOOL secrets_store_domain_sid(const char *domain, const DOM_SID *sid)
102 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
104 return secrets_store(key, sid, sizeof(DOM_SID));
107 BOOL secrets_fetch_domain_sid(const char *domain, DOM_SID *sid)
113 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
115 dyn_sid = (DOM_SID *)secrets_fetch(key, &size);
120 if (size != sizeof(DOM_SID))
131 BOOL secrets_store_domain_guid(const char *domain, GUID *guid)
135 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
137 return secrets_store(key, guid, sizeof(GUID));
140 BOOL secrets_fetch_domain_guid(const char *domain, GUID *guid)
147 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
149 dyn_guid = (GUID *)secrets_fetch(key, &size);
151 DEBUG(6,("key is %s, size is %d\n", key, (int)size));
153 if ((NULL == dyn_guid) && (ROLE_DOMAIN_PDC == lp_server_role())) {
154 uuid_generate_random(&new_guid);
155 if (!secrets_store_domain_guid(domain, &new_guid))
157 dyn_guid = (GUID *)secrets_fetch(key, &size);
158 if (dyn_guid == NULL)
162 if (size != sizeof(GUID))
174 * Form a key for fetching the machine trust account password
176 * @param domain domain name
178 * @return stored password's key
180 const char *trust_keystr(const char *domain)
182 static fstring keystr;
184 slprintf(keystr,sizeof(keystr)-1,"%s/%s",
185 SECRETS_MACHINE_ACCT_PASS, domain);
192 * Form a key for fetching a trusted domain password
194 * @param domain trusted domain name
196 * @return stored password's key
198 char *trustdom_keystr(const char *domain)
202 asprintf(&keystr, "%s/%s", SECRETS_DOMTRUST_ACCT_PASS, domain);
208 /************************************************************************
209 Lock the trust password entry.
210 ************************************************************************/
212 BOOL secrets_lock_trust_account_password(const char *domain, BOOL dolock)
218 return (tdb_lock_bystring(tdb, trust_keystr(domain),0) == 0);
220 tdb_unlock_bystring(tdb, trust_keystr(domain));
224 /************************************************************************
225 Routine to get the default secure channel type for trust accounts
226 ************************************************************************/
228 uint32 get_default_sec_channel(void)
230 if (lp_server_role() == ROLE_DOMAIN_BDC ||
231 lp_server_role() == ROLE_DOMAIN_PDC) {
234 return SEC_CHAN_WKSTA;
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
242 ************************************************************************/
244 BOOL secrets_fetch_trust_account_password(const char *domain, uint8 ret_pwd[16],
245 time_t *pass_last_set_time,
248 struct machine_acct_pass *pass;
252 plaintext = secrets_fetch_machine_password(domain, pass_last_set_time,
255 /* we have an ADS password - use that */
256 DEBUG(4,("Using ADS machine password\n"));
257 E_md4hash(plaintext, ret_pwd);
258 SAFE_FREE(plaintext);
262 if (!(pass = secrets_fetch(trust_keystr(domain), &size))) {
263 DEBUG(5, ("secrets_fetch failed!\n"));
267 if (size != sizeof(*pass)) {
268 DEBUG(0, ("secrets were of incorrect size!\n"));
272 if (pass_last_set_time) *pass_last_set_time = pass->mod_time;
273 memcpy(ret_pwd, pass->hash, 16);
277 *channel = get_default_sec_channel();
282 /************************************************************************
283 Routine to get account password to trusted domain
284 ************************************************************************/
286 BOOL secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
287 DOM_SID *sid, time_t *pass_last_set_time)
289 struct trusted_dom_pass *pass;
292 /* fetching trusted domain password structure */
293 if (!(pass = secrets_fetch(trustdom_keystr(domain), &size))) {
294 DEBUG(5, ("secrets_fetch failed!\n"));
298 if (size != sizeof(*pass)) {
299 DEBUG(0, ("secrets were of incorrect size!\n"));
303 /* the trust's password */
305 *pwd = strdup(pass->pass);
311 /* last change time */
312 if (pass_last_set_time) *pass_last_set_time = pass->mod_time;
315 memcpy(&sid, &(pass->domain_sid), sizeof(sid));
322 /************************************************************************
323 Routine to set the trust account password for a domain.
324 ************************************************************************/
326 BOOL secrets_store_trust_account_password(const char *domain, uint8 new_pwd[16])
328 struct machine_acct_pass pass;
330 pass.mod_time = time(NULL);
331 memcpy(pass.hash, new_pwd, 16);
333 return secrets_store(trust_keystr(domain), (void *)&pass, sizeof(pass));
337 * Routine to set the password for trusted domain
339 * @param domain remote domain name
340 * @param pwd plain text password of trust relationship
341 * @param sid remote domain sid
343 * @return true if succeeded
346 BOOL secrets_store_trusted_domain_password(const char* domain, smb_ucs2_t *uni_dom_name,
347 size_t uni_name_len, const char* pwd,
350 struct trusted_dom_pass pass;
353 /* unicode domain name and its length */
357 strncpy_w(pass.uni_name, uni_dom_name, sizeof(pass.uni_name) - 1);
358 pass.uni_name_len = uni_name_len;
360 /* last change time */
361 pass.mod_time = time(NULL);
363 /* password of the trust */
364 pass.pass_len = strlen(pwd);
365 fstrcpy(pass.pass, pwd);
368 memcpy(&(pass.domain_sid), &sid, sizeof(sid));
370 return secrets_store(trustdom_keystr(domain), (void *)&pass, sizeof(pass));
373 /************************************************************************
374 Routine to set the plaintext machine account password for a realm
375 the password is assumed to be a null terminated ascii string
376 ************************************************************************/
378 BOOL secrets_store_machine_password(const char *pass, const char *domain, uint32 sec_channel)
382 uint32 last_change_time;
383 uint32 sec_channel_type;
385 asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, domain);
390 ret = secrets_store(key, pass, strlen(pass)+1);
396 asprintf(&key, "%s/%s", SECRETS_MACHINE_LAST_CHANGE_TIME, domain);
401 SIVAL(&last_change_time, 0, time(NULL));
402 ret = secrets_store(key, &last_change_time, sizeof(last_change_time));
405 asprintf(&key, "%s/%s", SECRETS_MACHINE_SEC_CHANNEL_TYPE, domain);
410 SIVAL(&sec_channel_type, 0, sec_channel);
411 ret = secrets_store(key, &sec_channel_type, sizeof(sec_channel_type));
418 /************************************************************************
419 Routine to fetch the plaintext machine account password for a realm
420 the password is assumed to be a null terminated ascii string
421 ************************************************************************/
422 char *secrets_fetch_machine_password(const char *domain,
423 time_t *pass_last_set_time,
428 asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, domain);
430 ret = (char *)secrets_fetch(key, NULL);
433 if (pass_last_set_time) {
435 uint32 *last_set_time;
436 asprintf(&key, "%s/%s", SECRETS_MACHINE_LAST_CHANGE_TIME, domain);
438 last_set_time = secrets_fetch(key, &size);
440 *pass_last_set_time = IVAL(last_set_time,0);
442 *pass_last_set_time = 0;
449 uint32 *channel_type;
450 asprintf(&key, "%s/%s", SECRETS_MACHINE_SEC_CHANNEL_TYPE, domain);
452 channel_type = secrets_fetch(key, &size);
454 *channel = IVAL(channel_type,0);
456 *channel = get_default_sec_channel();
466 /************************************************************************
467 Routine to delete the machine trust account password file for a domain.
468 ************************************************************************/
470 BOOL trust_password_delete(const char *domain)
472 return secrets_delete(trust_keystr(domain));
475 /************************************************************************
476 Routine to delete the password for trusted domain
477 ************************************************************************/
479 BOOL trusted_domain_password_delete(const char *domain)
481 return secrets_delete(trustdom_keystr(domain));
485 /*******************************************************************
486 Reset the 'done' variables so after a client process is created
487 from a fork call these calls will be re-done. This should be
488 expanded if more variables need reseting.
489 ******************************************************************/
491 void reset_globals_after_fork(void)
498 * Increment the global seed value to ensure every smbd starts
499 * with a new random seed.
503 uint32 initial_val = sys_getpid();
504 tdb_change_int32_atomic(tdb, "INFO/random_seed", (int *)&initial_val, 1);
505 set_rand_reseed_data((unsigned char *)&initial_val, sizeof(initial_val));
509 * Re-seed the random crypto generator, so all smbd's
510 * started from the same parent won't generate the same
513 generate_random_buffer( &dummy, 1, True);
516 BOOL secrets_store_ldap_pw(const char* dn, char* pw)
521 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
522 DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
526 ret = secrets_store(key, pw, strlen(pw)+1);
534 * Get trusted domains info from secrets.tdb.
536 * The linked list is allocated on the supplied talloc context, caller gets to destroy
539 * @param ctx Allocation context
540 * @param enum_ctx Starting index, eg. we can start fetching at third
541 * or sixth trusted domain entry. Zero is the first index.
542 * Value it is set to is the enum context for the next enumeration.
543 * @param num_domains Number of domain entries to fetch at one call
544 * @param domains Pointer to array of trusted domain structs to be filled up
546 * @return nt status code of rpc response
549 NTSTATUS secrets_get_trusted_domains(TALLOC_CTX* ctx, int* enum_ctx, unsigned int max_num_domains, int *num_domains, TRUSTDOM ***domains)
551 TDB_LIST_NODE *keys, *k;
552 TRUSTDOM *dom = NULL;
554 unsigned int start_idx;
558 struct trusted_dom_pass *pass;
561 if (!secrets_init()) return NT_STATUS_ACCESS_DENIED;
564 start_idx = *enum_ctx;
566 /* generate searching pattern */
567 if (!(pattern = talloc_asprintf(ctx, "%s/*", SECRETS_DOMTRUST_ACCT_PASS))) {
568 DEBUG(0, ("secrets_get_trusted_domains: talloc_asprintf() failed!\n"));
569 return NT_STATUS_NO_MEMORY;
572 DEBUG(5, ("secrets_get_trusted_domains: looking for %d domains, starting at index %d\n",
573 max_num_domains, *enum_ctx));
575 *domains = talloc_zero(ctx, sizeof(**domains)*max_num_domains);
577 /* fetching trusted domains' data and collecting them in a list */
578 keys = tdb_search_keys(tdb, pattern);
581 * if there's no keys returned ie. no trusted domain,
582 * return "no more entries" code
584 status = NT_STATUS_NO_MORE_ENTRIES;
586 /* searching for keys in sectrets db -- way to go ... */
587 for (k = keys; k; k = k->next) {
590 /* important: ensure null-termination of the key string */
591 secrets_key = strndup(k->node_key.dptr, k->node_key.dsize);
593 DEBUG(0, ("strndup failed!\n"));
594 return NT_STATUS_NO_MEMORY;
597 pass = secrets_fetch(secrets_key, &size);
599 if (size != sizeof(*pass)) {
600 DEBUG(2, ("Secrets record %s is invalid!\n", secrets_key));
605 pull_ucs2_fstring(dom_name, pass->uni_name);
606 DEBUG(18, ("Fetched secret record num %d.\nDomain name: %s, SID: %s\n",
607 idx, dom_name, sid_string_static(&pass->domain_sid)));
609 SAFE_FREE(secrets_key);
611 if (idx >= start_idx && idx < start_idx + max_num_domains) {
612 dom = talloc_zero(ctx, sizeof(*dom));
614 /* free returned tdb record */
617 return NT_STATUS_NO_MEMORY;
620 /* copy domain sid */
621 SMB_ASSERT(sizeof(dom->sid) == sizeof(pass->domain_sid));
622 memcpy(&(dom->sid), &(pass->domain_sid), sizeof(dom->sid));
624 /* copy unicode domain name */
625 dom->name = talloc_strdup_w(ctx, pass->uni_name);
627 (*domains)[idx - start_idx] = dom;
629 DEBUG(18, ("Secret record is in required range.\n \
630 start_idx = %d, max_num_domains = %d. Added to returned array.\n",
631 start_idx, max_num_domains));
636 /* set proper status code to return */
638 /* there are yet some entries to enumerate */
639 status = STATUS_MORE_ENTRIES;
641 /* this is the last entry in the whole enumeration */
642 status = NT_STATUS_OK;
645 DEBUG(18, ("Secret is outside the required range.\n \
646 start_idx = %d, max_num_domains = %d. Not added to returned array\n",
647 start_idx, max_num_domains));
652 /* free returned tdb record */
656 DEBUG(5, ("secrets_get_trusted_domains: got %d domains\n", *num_domains));
658 /* free the results of searching the keys */
659 tdb_search_list_free(keys);
664 /*******************************************************************************
665 Lock the secrets tdb based on a string - this is used as a primitive form of mutex
666 between smbd instances.
667 *******************************************************************************/
669 BOOL secrets_named_mutex(const char *name, unsigned int timeout)
676 ret = tdb_lock_bystring(tdb, name, timeout);
678 DEBUG(10,("secrets_named_mutex: got mutex for %s\n", name ));
683 /*******************************************************************************
684 Unlock a named mutex.
685 *******************************************************************************/
687 void secrets_named_mutex_release(const char *name)
689 tdb_unlock_bystring(tdb, name);
690 DEBUG(10,("secrets_named_mutex: released mutex for %s\n", name ));
693 /*********************************************************
694 Check to see if we must talk to the PDC to avoid sam
696 ********************************************************/
698 BOOL must_use_pdc( const char *domain )
700 time_t now = time(NULL);
701 time_t last_change_time;
702 unsigned char passwd[16];
704 if ( !secrets_fetch_trust_account_password(domain, passwd, &last_change_time, NULL) )
708 * If the time the machine password has changed
709 * was less than about 15 minutes then we need to contact
710 * the PDC only, as we cannot be sure domain replication
711 * has yet taken place. Bug found by Gerald (way to go
715 if ( now - last_change_time < SAM_SYNC_WINDOW )