2 Unix SMB/CIFS implementation.
4 Winbind daemon for ntdom nss module
6 Copyright (C) Tim Potter 2000-2001
7 Copyright (C) 2001 by Martin Pool <mbp@samba.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #define DBGC_CLASS DBGC_WINBIND
30 * @file winbindd_util.c
32 * Winbind daemon for NT domain authentication nss module.
37 * Used to clobber name fields that have an undefined value.
39 * Correct code should never look at a field that has this value.
42 static const fstring name_deadbeef = "<deadbeef>";
44 /* The list of trusted domains. Note that the list can be deleted and
45 recreated using the init_domain_list() function so pointers to
46 individual winbindd_domain structures cannot be made. Keep a copy of
47 the domain name instead. */
49 static struct winbindd_domain *_domain_list;
51 struct winbindd_domain *domain_list(void)
56 if (!init_domain_list())
62 /* Free all entries in the trusted domain list */
64 void free_domain_list(void)
66 struct winbindd_domain *domain = _domain_list;
69 struct winbindd_domain *next = domain->next;
71 DLIST_REMOVE(_domain_list, domain);
78 /* Add a trusted domain to our list of domains */
79 static struct winbindd_domain *add_trusted_domain(const char *domain_name, const char *alt_name,
80 struct winbindd_methods *methods,
83 struct winbindd_domain *domain;
84 const char *alternative_name = NULL;
86 /* ignore alt_name if we are not in an AD domain */
88 if ( (lp_security() == SEC_ADS) && alt_name && *alt_name) {
89 alternative_name = alt_name;
92 /* We can't call domain_list() as this function is called from
93 init_domain_list() and we'll get stuck in a loop. */
94 for (domain = _domain_list; domain; domain = domain->next) {
95 if (strequal(domain_name, domain->name) ||
96 strequal(domain_name, domain->alt_name)) {
99 if (alternative_name && *alternative_name) {
100 if (strequal(alternative_name, domain->name) ||
101 strequal(alternative_name, domain->alt_name)) {
107 /* Create new domain entry */
109 if ((domain = (struct winbindd_domain *)
110 malloc(sizeof(*domain))) == NULL)
115 ZERO_STRUCTP(domain);
117 /* prioritise the short name */
118 if (strchr_m(domain_name, '.') && alternative_name && *alternative_name) {
119 fstrcpy(domain->name, alternative_name);
120 fstrcpy(domain->alt_name, domain_name);
122 fstrcpy(domain->name, domain_name);
123 if (alternative_name) {
124 fstrcpy(domain->alt_name, alternative_name);
128 domain->methods = methods;
129 domain->backend = NULL;
130 domain->sequence_number = DOM_SEQUENCE_NONE;
131 domain->last_seq_check = 0;
133 sid_copy(&domain->sid, sid);
136 /* see if this is a native mode win2k domain */
138 domain->native_mode = cm_check_for_native_mode_win2k( domain );
140 DEBUG(3,("add_trusted_domain: %s is a %s mode domain\n", domain->name,
141 domain->native_mode ? "native" : "mixed (or NT4)" ));
143 /* Link to domain list */
144 DLIST_ADD(_domain_list, domain);
146 DEBUG(1,("Added domain %s %s %s\n",
147 domain->name, domain->alt_name,
148 sid?sid_string_static(&domain->sid):""));
153 /********************************************************************
154 Periodically we need to refresh the trusted domain cache for smbd
155 ********************************************************************/
157 void rescan_trusted_domains( void )
159 static time_t last_scan;
160 time_t now = time(NULL);
161 struct winbindd_domain *mydomain = NULL;
163 /* see if the time has come... */
165 if ( (now > last_scan) && ((now-last_scan) < WINBINDD_RESCAN_FREQ) )
168 if ( (mydomain = find_our_domain()) == NULL ) {
169 DEBUG(0,("rescan_trusted_domains: Can't find my own domain!\n"));
173 /* this will only add new domains we didn't already know about */
175 add_trusted_domains( mydomain );
182 /********************************************************************
183 rescan our domains looking for new trusted domains
184 ********************************************************************/
186 void add_trusted_domains( struct winbindd_domain *domain )
194 DOM_SID *dom_sids, null_sid;
196 struct winbindd_domain *new_domain;
198 /* trusted domains might be disabled */
199 if (!lp_allow_trusted_domains()) {
203 DEBUG(1, ("scanning trusted domain list\n"));
205 if (!(mem_ctx = talloc_init("init_domain_list")))
208 ZERO_STRUCTP(&null_sid);
212 /* ask the DC what domains it trusts */
214 result = domain->methods->trusted_domains(domain, mem_ctx, (unsigned int *)&num_domains,
215 &names, &alt_names, &dom_sids);
217 if ( NT_STATUS_IS_OK(result) ) {
219 /* Add each domain to the trusted domain list */
221 for(i = 0; i < num_domains; i++) {
222 DEBUG(10,("Found domain %s\n", names[i]));
223 add_trusted_domain(names[i], alt_names?alt_names[i]:NULL,
224 domain->methods, &dom_sids[i]);
226 /* if the SID was empty, we better set it now */
228 if ( sid_equal(&dom_sids[i], &null_sid) ) {
230 new_domain = find_domain_from_name(names[i]);
232 /* this should never happen */
234 DEBUG(0,("rescan_trust_domains: can't find the domain I just added! [%s]\n",
239 /* call the cache method; which will operate on the winbindd_domain \
240 passed in and choose either rpc or ads as appropriate */
242 result = domain->methods->domain_sid( new_domain, &new_domain->sid );
244 if ( NT_STATUS_IS_OK(result) )
245 sid_copy( &dom_sids[i], &new_domain->sid );
248 /* store trusted domain in the cache */
249 trustdom_cache_store(names[i], alt_names ? alt_names[i] : NULL,
250 &dom_sids[i], t + WINBINDD_RESCAN_FREQ);
254 talloc_destroy(mem_ctx);
257 /* Look up global info for the winbind daemon */
258 BOOL init_domain_list(void)
260 extern struct winbindd_methods cache_methods;
261 struct winbindd_domain *domain;
263 /* Free existing list */
266 /* Add ourselves as the first entry. It *must* be the first entry */
268 domain = add_trusted_domain( lp_workgroup(), lp_realm(), &cache_methods, NULL);
270 domain->primary = True;
272 /* get any alternate name for the primary domain */
274 cache_methods.alternate_name(domain);
276 /* now we have the correct netbios (short) domain name */
279 set_global_myworkgroup( domain->name );
281 if (!secrets_fetch_domain_sid(domain->name, &domain->sid)) {
282 DEBUG(1, ("Could not fetch sid for our domain %s\n",
287 /* do an initial scan for trusted domains */
288 add_trusted_domains(domain);
294 * Given a domain name, return the struct winbindd domain info for it
296 * @note Do *not* pass lp_workgroup() to this function. domain_list
297 * may modify it's value, and free that pointer. Instead, our local
298 * domain may be found by calling find_our_domain().
302 * @return The domain structure for the named domain, if it is working.
305 struct winbindd_domain *find_domain_from_name(const char *domain_name)
307 struct winbindd_domain *domain;
309 /* Search through list */
311 for (domain = domain_list(); domain != NULL; domain = domain->next) {
312 if (strequal(domain_name, domain->name) ||
313 (domain->alt_name[0] && strequal(domain_name, domain->alt_name))) {
323 /* Given a domain sid, return the struct winbindd domain info for it */
325 struct winbindd_domain *find_domain_from_sid(DOM_SID *sid)
327 struct winbindd_domain *domain;
329 /* Search through list */
331 for (domain = domain_list(); domain != NULL; domain = domain->next) {
332 if (sid_compare_domain(sid, &domain->sid) == 0)
341 /* Given a domain sid, return the struct winbindd domain info for it */
343 struct winbindd_domain *find_our_domain()
345 struct winbindd_domain *domain;
347 /* Search through list */
349 for (domain = domain_list(); domain != NULL; domain = domain->next) {
359 /* Lookup a sid in a domain from a name */
361 BOOL winbindd_lookup_sid_by_name(struct winbindd_domain *domain,
362 const char *name, DOM_SID *sid,
363 enum SID_NAME_USE *type)
367 /* Don't bother with machine accounts */
369 if (name[strlen(name) - 1] == '$')
372 mem_ctx = talloc_init("lookup_sid_by_name for %s\n", name);
377 result = domain->methods->name_to_sid(domain, mem_ctx, name, sid, type);
379 talloc_destroy(mem_ctx);
381 /* Return rid and type if lookup successful */
382 if (!NT_STATUS_IS_OK(result)) {
383 *type = SID_NAME_UNKNOWN;
386 return NT_STATUS_IS_OK(result);
390 * @brief Lookup a name in a domain from a sid.
392 * @param sid Security ID you want to look up.
393 * @param name On success, set to the name corresponding to @p sid.
394 * @param dom_name On success, set to the 'domain name' corresponding to @p sid.
395 * @param type On success, contains the type of name: alias, group or
397 * @retval True if the name exists, in which case @p name and @p type
398 * are set, otherwise False.
400 BOOL winbindd_lookup_name_by_sid(DOM_SID *sid,
403 enum SID_NAME_USE *type)
409 struct winbindd_domain *domain;
411 domain = find_domain_from_sid(sid);
414 DEBUG(1,("Can't find domain from sid\n"));
420 if (!(mem_ctx = talloc_init("winbindd_lookup_name_by_sid")))
423 result = domain->methods->sid_to_name(domain, mem_ctx, sid, &names, type);
425 /* Return name and type if successful */
427 if ((rv = NT_STATUS_IS_OK(result))) {
428 fstrcpy(dom_name, domain->name);
429 fstrcpy(name, names);
431 *type = SID_NAME_UNKNOWN;
432 fstrcpy(name, name_deadbeef);
435 talloc_destroy(mem_ctx);
441 /* Free state information held for {set,get,end}{pw,gr}ent() functions */
443 void free_getent_state(struct getent_state *state)
445 struct getent_state *temp;
447 /* Iterate over state list */
451 while(temp != NULL) {
452 struct getent_state *next;
454 /* Free sam entries then list entry */
456 SAFE_FREE(state->sam_entries);
457 DLIST_REMOVE(state, state);
465 /* Parse winbindd related parameters */
467 BOOL winbindd_param_init(void)
469 /* Parse winbind uid and winbind_gid parameters */
471 if (!lp_idmap_uid(&server_state.uid_low, &server_state.uid_high)) {
472 DEBUG(0, ("winbindd: idmap uid range missing or invalid\n"));
473 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
477 if (!lp_idmap_gid(&server_state.gid_low, &server_state.gid_high)) {
478 DEBUG(0, ("winbindd: idmap gid range missing or invalid\n"));
479 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
486 /* Check if a domain is present in a comma-separated list of domains */
488 BOOL check_domain_env(char *domain_env, char *domain)
491 const char *tmp = domain_env;
493 while(next_token(&tmp, name, ",", sizeof(fstring))) {
494 if (strequal(name, domain))
501 /* Is this a domain which we may assume no DOMAIN\ prefix? */
503 static BOOL assume_domain(const char *domain) {
504 if ((lp_winbind_use_default_domain()
505 || lp_winbind_trusted_domains_only()) &&
506 strequal(lp_workgroup(), domain))
509 if (strequal(get_global_sam_name(), domain))
515 /* Parse a string of the form DOMAIN/user into a domain and a user */
517 BOOL parse_domain_user(const char *domuser, fstring domain, fstring user)
519 char *p = strchr(domuser,*lp_winbind_separator());
522 fstrcpy(user, domuser);
524 if ( assume_domain(lp_workgroup())) {
525 fstrcpy(domain, lp_workgroup());
527 fstrcpy( domain, get_global_sam_name() );
532 fstrcpy(domain, domuser);
533 domain[PTR_DIFF(p, domuser)] = 0;
542 Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and
543 'winbind separator' options.
545 - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is
548 If we are a PDC or BDC, and this is for our domain, do likewise.
550 Also, if omit DOMAIN if 'winbind trusted domains only = true', as the
551 username is then unqualified in unix
554 void fill_domain_username(fstring name, const char *domain, const char *user)
556 if (assume_domain(domain)) {
557 strlcpy(name, user, sizeof(fstring));
559 slprintf(name, sizeof(fstring) - 1, "%s%s%s",
560 domain, lp_winbind_separator(),
566 * Winbindd socket accessor functions
569 char *get_winbind_priv_pipe_dir(void)
571 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
574 /* Open the winbindd socket */
576 static int _winbindd_socket = -1;
577 static int _winbindd_priv_socket = -1;
579 int open_winbindd_socket(void)
581 if (_winbindd_socket == -1) {
582 _winbindd_socket = create_pipe_sock(
583 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755);
584 DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n",
588 return _winbindd_socket;
591 int open_winbindd_priv_socket(void)
593 if (_winbindd_priv_socket == -1) {
594 _winbindd_priv_socket = create_pipe_sock(
595 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
596 DEBUG(10, ("open_winbindd_priv_socket: opened socket fd %d\n",
597 _winbindd_priv_socket));
600 return _winbindd_priv_socket;
603 /* Close the winbindd socket */
605 void close_winbindd_socket(void)
607 if (_winbindd_socket != -1) {
608 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
610 close(_winbindd_socket);
611 _winbindd_socket = -1;
613 if (_winbindd_priv_socket != -1) {
614 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
615 _winbindd_priv_socket));
616 close(_winbindd_priv_socket);
617 _winbindd_priv_socket = -1;
622 * Client list accessor functions
625 static struct winbindd_cli_state *_client_list;
626 static int _num_clients;
628 /* Return list of all connected clients */
630 struct winbindd_cli_state *winbindd_client_list(void)
635 /* Add a connection to the list */
637 void winbindd_add_client(struct winbindd_cli_state *cli)
639 DLIST_ADD(_client_list, cli);
643 /* Remove a client from the list */
645 void winbindd_remove_client(struct winbindd_cli_state *cli)
647 DLIST_REMOVE(_client_list, cli);
651 /* Close all open clients */
653 void winbindd_kill_all_clients(void)
655 struct winbindd_cli_state *cl = winbindd_client_list();
657 DEBUG(10, ("winbindd_kill_all_clients: going postal\n"));
660 struct winbindd_cli_state *next;
663 winbindd_remove_client(cl);
668 /* Return number of open clients */
670 int winbindd_num_clients(void)
675 /* Help with RID -> SID conversion */
677 DOM_SID *rid_to_talloced_sid(struct winbindd_domain *domain,
682 sid = talloc(mem_ctx, sizeof(*sid));
684 smb_panic("rid_to_to_talloced_sid: talloc for DOM_SID failed!\n");
686 sid_copy(sid, &domain->sid);
687 sid_append_rid(sid, rid);
691 /*****************************************************************************
692 For idmap conversion: convert one record to new format
693 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
695 *****************************************************************************/
696 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
698 struct winbindd_domain *domain;
705 BOOL *failed = (BOOL *)state;
707 DEBUG(10,("Converting %s\n", key.dptr));
709 p = strchr(key.dptr, '/');
714 fstrcpy(dom_name, key.dptr);
717 domain = find_domain_from_name(dom_name);
718 if (domain == NULL) {
719 /* We must delete the old record. */
720 DEBUG(0,("Unable to find domain %s\n", dom_name ));
721 DEBUG(0,("deleting record %s\n", key.dptr ));
723 if (tdb_delete(tdb, key) != 0) {
724 DEBUG(0, ("Unable to delete record %s\n", key.dptr));
734 sid_copy(&sid, &domain->sid);
735 sid_append_rid(&sid, rid);
737 sid_to_string(keystr, &sid);
739 key2.dsize = strlen(keystr) + 1;
741 if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
742 DEBUG(0,("Unable to add record %s\n", key2.dptr ));
747 if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
748 DEBUG(0,("Unable to update record %s\n", data.dptr ));
753 if (tdb_delete(tdb, key) != 0) {
754 DEBUG(0,("Unable to delete record %s\n", key.dptr ));
762 /* These definitions are from sam/idmap_tdb.c. Replicated here just
763 out of laziness.... :-( */
765 /* High water mark keys */
766 #define HWM_GROUP "GROUP HWM"
767 #define HWM_USER "USER HWM"
769 /* idmap version determines auto-conversion */
770 #define IDMAP_VERSION 2
773 /*****************************************************************************
774 Convert the idmap database from an older version.
775 *****************************************************************************/
777 static BOOL idmap_convert(const char *idmap_name)
780 BOOL bigendianheader;
782 TDB_CONTEXT *idmap_tdb;
784 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
787 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
791 bigendianheader = (idmap_tdb->flags & TDB_BIGENDIAN) ? True : False;
793 vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
795 if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
796 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
798 * high and low records were created on a
799 * big endian machine and will need byte-reversing.
804 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
809 wm = server_state.uid_low;
812 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
813 DEBUG(0, ("idmap_convert: Unable to byteswap user hwm in idmap database\n"));
814 tdb_close(idmap_tdb);
818 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
822 wm = server_state.gid_low;
825 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
826 DEBUG(0, ("idmap_convert: Unable to byteswap group hwm in idmap database\n"));
827 tdb_close(idmap_tdb);
832 /* the old format stored as DOMAIN/rid - now we store the SID direct */
833 tdb_traverse(idmap_tdb, convert_fn, &failed);
836 DEBUG(0, ("Problem during conversion\n"));
837 tdb_close(idmap_tdb);
841 if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
842 DEBUG(0, ("idmap_convert: Unable to dtore idmap version in databse\n"));
843 tdb_close(idmap_tdb);
847 tdb_close(idmap_tdb);
851 /*****************************************************************************
852 Convert the idmap database from an older version if necessary
853 *****************************************************************************/
855 BOOL winbindd_upgrade_idmap(void)
859 SMB_STRUCT_STAT stbuf;
860 TDB_CONTEXT *idmap_tdb;
862 pstrcpy(idmap_name, lock_path("winbindd_idmap.tdb"));
864 if (!file_exist(idmap_name, &stbuf)) {
865 /* nothing to convert return */
869 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
872 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
876 if (tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION") == IDMAP_VERSION) {
877 /* nothing to convert return */
878 tdb_close(idmap_tdb);
882 /* backup_tdb expects the tdb not to be open */
883 tdb_close(idmap_tdb);
885 DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
887 pstrcpy(backup_name, idmap_name);
888 pstrcat(backup_name, ".bak");
890 if (backup_tdb(idmap_name, backup_name) != 0) {
891 DEBUG(0, ("Could not backup idmap database\n"));
895 return idmap_convert(idmap_name);
898 /*******************************************************************
899 wrapper around retrieving the trust account password
900 *******************************************************************/
902 BOOL get_trust_pw(const char *domain, uint8 ret_pwd[16],
903 time_t *pass_last_set_time, uint32 *channel)
908 /* if we are a DC and this is not our domain, then lookup an account
909 for the domain trust */
911 if ( IS_DC && !strequal(domain, lp_workgroup()) && lp_allow_trusted_domains() )
913 if ( !secrets_fetch_trusted_domain_password(domain, &pwd, &sid,
914 pass_last_set_time) )
916 DEBUG(0, ("get_trust_pw: could not fetch trust account "
917 "password for trusted domain %s\n", domain));
921 *channel = SEC_CHAN_DOMAIN;
922 E_md4hash(pwd, ret_pwd);
927 else /* just get the account for our domain (covers
928 ROLE_DOMAIN_MEMBER as well */
930 /* get the machine trust account for our domain */
932 if ( !secrets_fetch_trust_account_password (lp_workgroup(), ret_pwd,
933 pass_last_set_time, channel) )
935 DEBUG(0, ("get_trust_pw: could not fetch trust account "
936 "password for my domain %s\n", domain));