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)
61 /* Free all entries in the trusted domain list */
63 void free_domain_list(void)
65 struct winbindd_domain *domain = _domain_list;
68 struct winbindd_domain *next = domain->next;
70 DLIST_REMOVE(_domain_list, domain);
77 /* Add a trusted domain to our list of domains */
78 static struct winbindd_domain *add_trusted_domain(const char *domain_name, const char *alt_name,
79 struct winbindd_methods *methods,
82 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 (strcasecmp(domain_name, domain->name) == 0 ||
96 strcasecmp(domain_name, domain->alt_name) == 0) {
99 if (alternative_name && *alternative_name) {
100 if (strcasecmp(alternative_name, domain->name) == 0 ||
101 strcasecmp(alternative_name, domain->alt_name) == 0) {
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 (use realm name if possible) */
138 contact_name = *domain->alt_name ? domain->alt_name : domain->name;
139 domain->native_mode = cm_check_for_native_mode_win2k( contact_name );
141 DEBUG(3,("add_trusted_domain: %s is a %s mode domain\n", contact_name,
142 domain->native_mode ? "native" : "mixed (or NT4)" ));
144 /* Link to domain list */
145 DLIST_ADD(_domain_list, domain);
147 DEBUG(1,("Added domain %s %s %s\n",
148 domain->name, domain->alt_name,
149 sid?sid_string_static(&domain->sid):""));
154 /********************************************************************
155 Periodically we need to refresh the trusted domain cache for smbd
156 ********************************************************************/
158 void rescan_trusted_domains( void )
160 static time_t last_scan;
161 time_t now = time(NULL);
162 struct winbindd_domain *mydomain = NULL;
164 /* see if the time has come... */
166 if ( (now > last_scan) && ((now-last_scan) < WINBINDD_RESCAN_FREQ) )
169 /* get the handle for our domain */
171 if ( (mydomain = find_domain_from_name(lp_workgroup())) == NULL ) {
172 DEBUG(0,("rescan_trusted_domains: Can't find my own domain!\n"));
176 /* this will only add new domains we didn't already know about */
178 add_trusted_domains( mydomain );
185 /********************************************************************
186 rescan our domains looking for new trusted domains
187 ********************************************************************/
189 void add_trusted_domains( struct winbindd_domain *domain )
197 DOM_SID *dom_sids, null_sid;
199 struct winbindd_domain *new_domain;
201 /* trusted domains might be disabled */
202 if (!lp_allow_trusted_domains()) {
206 DEBUG(1, ("scanning trusted domain list\n"));
208 if (!(mem_ctx = talloc_init("init_domain_list")))
211 ZERO_STRUCTP(&null_sid);
215 /* ask the DC what domains it trusts */
217 result = domain->methods->trusted_domains(domain, mem_ctx, (unsigned int *)&num_domains,
218 &names, &alt_names, &dom_sids);
220 if ( NT_STATUS_IS_OK(result) ) {
222 /* Add each domain to the trusted domain list */
224 for(i = 0; i < num_domains; i++) {
225 DEBUG(10,("Found domain %s\n", names[i]));
226 add_trusted_domain(names[i], alt_names?alt_names[i]:NULL,
227 domain->methods, &dom_sids[i]);
229 /* if the SID was empty, we better set it now */
231 if ( sid_equal(&dom_sids[i], &null_sid) ) {
233 new_domain = find_domain_from_name(names[i]);
235 /* this should never happen */
237 DEBUG(0,("rescan_trust_domains: can't find the domain I just added! [%s]\n",
242 /* call the cache method; which will operate on the winbindd_domain \
243 passed in and choose either rpc or ads as appropriate */
245 result = domain->methods->domain_sid( new_domain, &new_domain->sid );
247 if ( NT_STATUS_IS_OK(result) )
248 sid_copy( &dom_sids[i], &new_domain->sid );
251 /* store trusted domain in the cache */
252 trustdom_cache_store(names[i], alt_names ? alt_names[i] : NULL,
253 &dom_sids[i], t + WINBINDD_RESCAN_FREQ);
257 talloc_destroy(mem_ctx);
260 /* Look up global info for the winbind daemon */
261 BOOL init_domain_list(void)
263 extern struct winbindd_methods cache_methods;
264 struct winbindd_domain *domain;
266 /* Free existing list */
269 /* Add ourselves as the first entry */
271 domain = add_trusted_domain( lp_workgroup(), lp_realm(), &cache_methods, NULL);
273 /* get any alternate name for the primary domain */
275 cache_methods.alternate_name(domain);
277 /* now we have the correct netbios (short) domain name */
280 set_global_myworkgroup( domain->name );
282 if (!secrets_fetch_domain_sid(domain->name, &domain->sid)) {
283 DEBUG(1, ("Could not fetch sid for our domain %s\n",
288 /* do an initial scan for trusted domains */
289 add_trusted_domains(domain);
294 /* Given a domain name, return the struct winbindd domain info for it
295 if it is actually working. */
297 struct winbindd_domain *find_domain_from_name(const char *domain_name)
299 struct winbindd_domain *domain;
301 /* Search through list */
303 for (domain = domain_list(); domain != NULL; domain = domain->next) {
304 if (strequal(domain_name, domain->name) ||
305 (domain->alt_name[0] && strequal(domain_name, domain->alt_name)))
314 /* Given a domain sid, return the struct winbindd domain info for it */
316 struct winbindd_domain *find_domain_from_sid(DOM_SID *sid)
318 struct winbindd_domain *domain;
320 /* Search through list */
322 for (domain = domain_list(); domain != NULL; domain = domain->next) {
323 if (sid_compare_domain(sid, &domain->sid) == 0)
332 /* Lookup a sid in a domain from a name */
334 BOOL winbindd_lookup_sid_by_name(struct winbindd_domain *domain,
335 const char *name, DOM_SID *sid,
336 enum SID_NAME_USE *type)
340 /* Don't bother with machine accounts */
342 if (name[strlen(name) - 1] == '$')
345 mem_ctx = talloc_init("lookup_sid_by_name for %s\n", name);
350 result = domain->methods->name_to_sid(domain, mem_ctx, name, sid, type);
352 talloc_destroy(mem_ctx);
354 /* Return rid and type if lookup successful */
355 if (!NT_STATUS_IS_OK(result)) {
356 *type = SID_NAME_UNKNOWN;
359 return NT_STATUS_IS_OK(result);
363 * @brief Lookup a name in a domain from a sid.
365 * @param sid Security ID you want to look up.
366 * @param name On success, set to the name corresponding to @p sid.
367 * @param dom_name On success, set to the 'domain name' corresponding to @p sid.
368 * @param type On success, contains the type of name: alias, group or
370 * @retval True if the name exists, in which case @p name and @p type
371 * are set, otherwise False.
373 BOOL winbindd_lookup_name_by_sid(DOM_SID *sid,
376 enum SID_NAME_USE *type)
382 struct winbindd_domain *domain;
384 domain = find_domain_from_sid(sid);
387 DEBUG(1,("Can't find domain from sid\n"));
393 if (!(mem_ctx = talloc_init("winbindd_lookup_name_by_sid")))
396 result = domain->methods->sid_to_name(domain, mem_ctx, sid, &names, type);
398 /* Return name and type if successful */
400 if ((rv = NT_STATUS_IS_OK(result))) {
401 fstrcpy(dom_name, domain->name);
402 fstrcpy(name, names);
404 *type = SID_NAME_UNKNOWN;
405 fstrcpy(name, name_deadbeef);
408 talloc_destroy(mem_ctx);
414 /* Free state information held for {set,get,end}{pw,gr}ent() functions */
416 void free_getent_state(struct getent_state *state)
418 struct getent_state *temp;
420 /* Iterate over state list */
424 while(temp != NULL) {
425 struct getent_state *next;
427 /* Free sam entries then list entry */
429 SAFE_FREE(state->sam_entries);
430 DLIST_REMOVE(state, state);
438 /* Parse winbindd related parameters */
440 BOOL winbindd_param_init(void)
442 /* Parse winbind uid and winbind_gid parameters */
444 if (!lp_idmap_uid(&server_state.uid_low, &server_state.uid_high)) {
445 DEBUG(0, ("winbindd: idmap uid range missing or invalid\n"));
446 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
450 if (!lp_idmap_gid(&server_state.gid_low, &server_state.gid_high)) {
451 DEBUG(0, ("winbindd: idmap gid range missing or invalid\n"));
452 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
459 /* Check if a domain is present in a comma-separated list of domains */
461 BOOL check_domain_env(char *domain_env, char *domain)
464 const char *tmp = domain_env;
466 while(next_token(&tmp, name, ",", sizeof(fstring))) {
467 if (strequal(name, domain))
474 /* Parse a string of the form DOMAIN/user into a domain and a user */
476 BOOL parse_domain_user(const char *domuser, fstring domain, fstring user)
478 char *p = strchr(domuser,*lp_winbind_separator());
481 fstrcpy(user, domuser);
483 if ( lp_winbind_use_default_domain() )
484 fstrcpy(domain, lp_workgroup());
486 fstrcpy( domain, "" );
490 fstrcpy(domain, domuser);
491 domain[PTR_DIFF(p, domuser)] = 0;
500 Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and
501 'winbind separator' options.
503 - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is
507 void fill_domain_username(fstring name, const char *domain, const char *user)
509 if(lp_winbind_use_default_domain() &&
510 !strcmp(lp_workgroup(), domain)) {
511 strlcpy(name, user, sizeof(fstring));
513 slprintf(name, sizeof(fstring) - 1, "%s%s%s",
514 domain, lp_winbind_separator(),
520 * Winbindd socket accessor functions
523 char *get_winbind_priv_pipe_dir(void)
525 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
528 /* Open the winbindd socket */
530 static int _winbindd_socket = -1;
531 static int _winbindd_priv_socket = -1;
533 int open_winbindd_socket(void)
535 if (_winbindd_socket == -1) {
536 _winbindd_socket = create_pipe_sock(
537 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755);
538 DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n",
542 return _winbindd_socket;
545 int open_winbindd_priv_socket(void)
547 if (_winbindd_priv_socket == -1) {
548 _winbindd_priv_socket = create_pipe_sock(
549 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
550 DEBUG(10, ("open_winbindd_priv_socket: opened socket fd %d\n",
551 _winbindd_priv_socket));
554 return _winbindd_priv_socket;
557 /* Close the winbindd socket */
559 void close_winbindd_socket(void)
561 if (_winbindd_socket != -1) {
562 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
564 close(_winbindd_socket);
565 _winbindd_socket = -1;
567 if (_winbindd_priv_socket != -1) {
568 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
569 _winbindd_priv_socket));
570 close(_winbindd_priv_socket);
571 _winbindd_priv_socket = -1;
576 * Client list accessor functions
579 static struct winbindd_cli_state *_client_list;
580 static int _num_clients;
582 /* Return list of all connected clients */
584 struct winbindd_cli_state *winbindd_client_list(void)
589 /* Add a connection to the list */
591 void winbindd_add_client(struct winbindd_cli_state *cli)
593 DLIST_ADD(_client_list, cli);
597 /* Remove a client from the list */
599 void winbindd_remove_client(struct winbindd_cli_state *cli)
601 DLIST_REMOVE(_client_list, cli);
605 /* Close all open clients */
607 void winbindd_kill_all_clients(void)
609 struct winbindd_cli_state *cl = winbindd_client_list();
611 DEBUG(10, ("winbindd_kill_all_clients: going postal\n"));
614 struct winbindd_cli_state *next;
617 winbindd_remove_client(cl);
622 /* Return number of open clients */
624 int winbindd_num_clients(void)
629 /* Help with RID -> SID conversion */
631 DOM_SID *rid_to_talloced_sid(struct winbindd_domain *domain,
636 sid = talloc(mem_ctx, sizeof(*sid));
638 smb_panic("rid_to_to_talloced_sid: talloc for DOM_SID failed!\n");
640 sid_copy(sid, &domain->sid);
641 sid_append_rid(sid, rid);
645 /*****************************************************************************
646 For idmap conversion: convert one record to new format
647 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
649 *****************************************************************************/
650 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
652 struct winbindd_domain *domain;
659 BOOL *failed = (BOOL *)state;
661 DEBUG(10,("Converting %s\n", key.dptr));
663 p = strchr(key.dptr, '/');
668 fstrcpy(dom_name, key.dptr);
671 domain = find_domain_from_name(dom_name);
672 if (domain == NULL) {
673 /* We must delete the old record. */
674 DEBUG(0,("Unable to find domain %s\n", dom_name ));
675 DEBUG(0,("deleting record %s\n", key.dptr ));
677 if (tdb_delete(tdb, key) != 0) {
678 DEBUG(0, ("Unable to delete record %s\n", key.dptr));
688 sid_copy(&sid, &domain->sid);
689 sid_append_rid(&sid, rid);
691 sid_to_string(keystr, &sid);
693 key2.dsize = strlen(keystr) + 1;
695 if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
696 DEBUG(0,("Unable to add record %s\n", key2.dptr ));
701 if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
702 DEBUG(0,("Unable to update record %s\n", data.dptr ));
707 if (tdb_delete(tdb, key) != 0) {
708 DEBUG(0,("Unable to delete record %s\n", key.dptr ));
716 /* These definitions are from sam/idmap_tdb.c. Replicated here just
717 out of laziness.... :-( */
719 /* High water mark keys */
720 #define HWM_GROUP "GROUP HWM"
721 #define HWM_USER "USER HWM"
723 /* idmap version determines auto-conversion */
724 #define IDMAP_VERSION 2
727 /*****************************************************************************
728 Convert the idmap database from an older version.
729 *****************************************************************************/
731 static BOOL idmap_convert(const char *idmap_name)
734 BOOL bigendianheader;
736 TDB_CONTEXT *idmap_tdb;
738 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
741 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
745 bigendianheader = (idmap_tdb->flags & TDB_BIGENDIAN) ? True : False;
747 vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
749 if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
750 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
752 * high and low records were created on a
753 * big endian machine and will need byte-reversing.
758 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
763 wm = server_state.uid_low;
766 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
767 DEBUG(0, ("idmap_convert: Unable to byteswap user hwm in idmap database\n"));
768 tdb_close(idmap_tdb);
772 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
776 wm = server_state.gid_low;
779 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
780 DEBUG(0, ("idmap_convert: Unable to byteswap group hwm in idmap database\n"));
781 tdb_close(idmap_tdb);
786 /* the old format stored as DOMAIN/rid - now we store the SID direct */
787 tdb_traverse(idmap_tdb, convert_fn, &failed);
790 DEBUG(0, ("Problem during conversion\n"));
791 tdb_close(idmap_tdb);
795 if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
796 DEBUG(0, ("idmap_convert: Unable to dtore idmap version in databse\n"));
797 tdb_close(idmap_tdb);
801 tdb_close(idmap_tdb);
805 /*****************************************************************************
806 Convert the idmap database from an older version if necessary
807 *****************************************************************************/
809 BOOL winbindd_upgrade_idmap(void)
813 SMB_STRUCT_STAT stbuf;
814 TDB_CONTEXT *idmap_tdb;
816 pstrcpy(idmap_name, lock_path("winbindd_idmap.tdb"));
818 if (!file_exist(idmap_name, &stbuf)) {
819 /* nothing to convert return */
823 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
826 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
830 if (tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION") == IDMAP_VERSION) {
831 /* nothing to convert return */
832 tdb_close(idmap_tdb);
836 /* backup_tdb expects the tdb not to be open */
837 tdb_close(idmap_tdb);
839 DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
841 pstrcpy(backup_name, idmap_name);
842 pstrcat(backup_name, ".bak");
844 if (backup_tdb(idmap_name, backup_name) != 0) {
845 DEBUG(0, ("Could not backup idmap database\n"));
849 return idmap_convert(idmap_name);
852 /*******************************************************************
853 wrapper around retrieving the trust account password
854 *******************************************************************/
856 BOOL get_trust_pw(const char *domain, uint8 ret_pwd[16],
857 time_t *pass_last_set_time, uint32 *channel)
862 /* if we are a DC and this is not our domain, then lookup an account
863 for the domain trust */
865 if ( IS_DC && !strequal(domain, lp_workgroup()) && lp_allow_trusted_domains() )
867 if ( !secrets_fetch_trusted_domain_password(domain, &pwd, &sid,
868 pass_last_set_time) )
870 DEBUG(0, ("get_trust_pw: could not fetch trust account "
871 "password for trusted domain %s\n", domain));
875 *channel = SEC_CHAN_DOMAIN;
876 E_md4hash(pwd, ret_pwd);
881 else /* just get the account for our domain (covers
882 ROLE_DOMAIN_MEMBER as well */
884 /* get the machine trust account for our domain */
886 if ( !secrets_fetch_trust_account_password (lp_workgroup(), ret_pwd,
887 pass_last_set_time, channel) )
889 DEBUG(0, ("get_trust_pw: could not fetch trust account "
890 "password for my domain %s\n", domain));