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;
85 const char *alternative_name = NULL;
87 /* ignore alt_name if we are not in an AD domain */
89 if ( (lp_security() == SEC_ADS) && alt_name && *alt_name) {
90 alternative_name = alt_name;
93 /* We can't call domain_list() as this function is called from
94 init_domain_list() and we'll get stuck in a loop. */
95 for (domain = _domain_list; domain; domain = domain->next) {
96 if (strequal(domain_name, domain->name) ||
97 strequal(domain_name, domain->alt_name)) {
100 if (alternative_name && *alternative_name) {
101 if (strequal(alternative_name, domain->name) ||
102 strequal(alternative_name, domain->alt_name)) {
108 /* Create new domain entry */
110 if ((domain = (struct winbindd_domain *)
111 malloc(sizeof(*domain))) == NULL)
116 ZERO_STRUCTP(domain);
118 /* prioritise the short name */
119 if (strchr_m(domain_name, '.') && alternative_name && *alternative_name) {
120 fstrcpy(domain->name, alternative_name);
121 fstrcpy(domain->alt_name, domain_name);
123 fstrcpy(domain->name, domain_name);
124 if (alternative_name) {
125 fstrcpy(domain->alt_name, alternative_name);
129 domain->methods = methods;
130 domain->backend = NULL;
131 domain->sequence_number = DOM_SEQUENCE_NONE;
132 domain->last_seq_check = 0;
134 sid_copy(&domain->sid, sid);
137 /* see if this is a native mode win2k domain (use realm name if possible) */
139 contact_name = *domain->alt_name ? domain->alt_name : domain->name;
140 domain->native_mode = cm_check_for_native_mode_win2k( contact_name );
142 DEBUG(3,("add_trusted_domain: %s is a %s mode domain\n", contact_name,
143 domain->native_mode ? "native" : "mixed (or NT4)" ));
145 /* Link to domain list */
146 DLIST_ADD(_domain_list, domain);
148 DEBUG(1,("Added domain %s %s %s\n",
149 domain->name, domain->alt_name,
150 sid?sid_string_static(&domain->sid):""));
155 /********************************************************************
156 Periodically we need to refresh the trusted domain cache for smbd
157 ********************************************************************/
159 void rescan_trusted_domains( void )
161 static time_t last_scan;
162 time_t now = time(NULL);
163 struct winbindd_domain *mydomain = NULL;
165 /* see if the time has come... */
167 if ( (now > last_scan) && ((now-last_scan) < WINBINDD_RESCAN_FREQ) )
170 if ( (mydomain = find_our_domain()) == NULL ) {
171 DEBUG(0,("rescan_trusted_domains: Can't find my own domain!\n"));
175 /* this will only add new domains we didn't already know about */
177 add_trusted_domains( mydomain );
184 /********************************************************************
185 rescan our domains looking for new trusted domains
186 ********************************************************************/
188 void add_trusted_domains( struct winbindd_domain *domain )
196 DOM_SID *dom_sids, null_sid;
198 struct winbindd_domain *new_domain;
200 /* trusted domains might be disabled */
201 if (!lp_allow_trusted_domains()) {
205 DEBUG(1, ("scanning trusted domain list\n"));
207 if (!(mem_ctx = talloc_init("init_domain_list")))
210 ZERO_STRUCTP(&null_sid);
214 /* ask the DC what domains it trusts */
216 result = domain->methods->trusted_domains(domain, mem_ctx, (unsigned int *)&num_domains,
217 &names, &alt_names, &dom_sids);
219 if ( NT_STATUS_IS_OK(result) ) {
221 /* Add each domain to the trusted domain list */
223 for(i = 0; i < num_domains; i++) {
224 DEBUG(10,("Found domain %s\n", names[i]));
225 add_trusted_domain(names[i], alt_names?alt_names[i]:NULL,
226 domain->methods, &dom_sids[i]);
228 /* if the SID was empty, we better set it now */
230 if ( sid_equal(&dom_sids[i], &null_sid) ) {
232 new_domain = find_domain_from_name(names[i]);
234 /* this should never happen */
236 DEBUG(0,("rescan_trust_domains: can't find the domain I just added! [%s]\n",
241 /* call the cache method; which will operate on the winbindd_domain \
242 passed in and choose either rpc or ads as appropriate */
244 result = domain->methods->domain_sid( new_domain, &new_domain->sid );
246 if ( NT_STATUS_IS_OK(result) )
247 sid_copy( &dom_sids[i], &new_domain->sid );
250 /* store trusted domain in the cache */
251 trustdom_cache_store(names[i], alt_names ? alt_names[i] : NULL,
252 &dom_sids[i], t + WINBINDD_RESCAN_FREQ);
256 talloc_destroy(mem_ctx);
259 /* Look up global info for the winbind daemon */
260 BOOL init_domain_list(void)
262 extern struct winbindd_methods cache_methods;
263 struct winbindd_domain *domain;
265 /* Free existing list */
268 /* Add ourselves as the first entry. It *must* be the first entry */
270 domain = add_trusted_domain( lp_workgroup(), lp_realm(), &cache_methods, NULL);
272 domain->primary = True;
274 /* get any alternate name for the primary domain */
276 cache_methods.alternate_name(domain);
278 /* now we have the correct netbios (short) domain name */
281 set_global_myworkgroup( domain->name );
283 if (!secrets_fetch_domain_sid(domain->name, &domain->sid)) {
284 DEBUG(1, ("Could not fetch sid for our domain %s\n",
289 /* do an initial scan for trusted domains */
290 add_trusted_domains(domain);
296 * Given a domain name, return the struct winbindd domain info for it
298 * @note Do *not* pass lp_workgroup() to this function. domain_list
299 * may modify it's value, and free that pointer. Instead, our local
300 * domain may be found by looking at the first entry in domain_list()
304 * @return The domain structure for the named domain, if it is working.
307 struct winbindd_domain *find_domain_from_name(const char *domain_name)
309 struct winbindd_domain *domain;
311 /* Search through list */
313 for (domain = domain_list(); domain != NULL; domain = domain->next) {
314 if (strequal(domain_name, domain->name) ||
315 (domain->alt_name[0] && strequal(domain_name, domain->alt_name))) {
325 /* Given a domain sid, return the struct winbindd domain info for it */
327 struct winbindd_domain *find_domain_from_sid(DOM_SID *sid)
329 struct winbindd_domain *domain;
331 /* Search through list */
333 for (domain = domain_list(); domain != NULL; domain = domain->next) {
334 if (sid_compare_domain(sid, &domain->sid) == 0)
343 /* Given a domain sid, return the struct winbindd domain info for it */
345 struct winbindd_domain *find_our_domain()
347 struct winbindd_domain *domain;
349 /* Search through list */
351 for (domain = domain_list(); domain != NULL; domain = domain->next) {
361 /* Lookup a sid in a domain from a name */
363 BOOL winbindd_lookup_sid_by_name(struct winbindd_domain *domain,
364 const char *name, DOM_SID *sid,
365 enum SID_NAME_USE *type)
369 /* Don't bother with machine accounts */
371 if (name[strlen(name) - 1] == '$')
374 mem_ctx = talloc_init("lookup_sid_by_name for %s\n", name);
379 result = domain->methods->name_to_sid(domain, mem_ctx, name, sid, type);
381 talloc_destroy(mem_ctx);
383 /* Return rid and type if lookup successful */
384 if (!NT_STATUS_IS_OK(result)) {
385 *type = SID_NAME_UNKNOWN;
388 return NT_STATUS_IS_OK(result);
392 * @brief Lookup a name in a domain from a sid.
394 * @param sid Security ID you want to look up.
395 * @param name On success, set to the name corresponding to @p sid.
396 * @param dom_name On success, set to the 'domain name' corresponding to @p sid.
397 * @param type On success, contains the type of name: alias, group or
399 * @retval True if the name exists, in which case @p name and @p type
400 * are set, otherwise False.
402 BOOL winbindd_lookup_name_by_sid(DOM_SID *sid,
405 enum SID_NAME_USE *type)
411 struct winbindd_domain *domain;
413 domain = find_domain_from_sid(sid);
416 DEBUG(1,("Can't find domain from sid\n"));
422 if (!(mem_ctx = talloc_init("winbindd_lookup_name_by_sid")))
425 result = domain->methods->sid_to_name(domain, mem_ctx, sid, &names, type);
427 /* Return name and type if successful */
429 if ((rv = NT_STATUS_IS_OK(result))) {
430 fstrcpy(dom_name, domain->name);
431 fstrcpy(name, names);
433 *type = SID_NAME_UNKNOWN;
434 fstrcpy(name, name_deadbeef);
437 talloc_destroy(mem_ctx);
443 /* Free state information held for {set,get,end}{pw,gr}ent() functions */
445 void free_getent_state(struct getent_state *state)
447 struct getent_state *temp;
449 /* Iterate over state list */
453 while(temp != NULL) {
454 struct getent_state *next;
456 /* Free sam entries then list entry */
458 SAFE_FREE(state->sam_entries);
459 DLIST_REMOVE(state, state);
467 /* Parse winbindd related parameters */
469 BOOL winbindd_param_init(void)
471 /* Parse winbind uid and winbind_gid parameters */
473 if (!lp_idmap_uid(&server_state.uid_low, &server_state.uid_high)) {
474 DEBUG(0, ("winbindd: idmap uid range missing or invalid\n"));
475 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
479 if (!lp_idmap_gid(&server_state.gid_low, &server_state.gid_high)) {
480 DEBUG(0, ("winbindd: idmap gid range missing or invalid\n"));
481 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
488 /* Check if a domain is present in a comma-separated list of domains */
490 BOOL check_domain_env(char *domain_env, char *domain)
493 const char *tmp = domain_env;
495 while(next_token(&tmp, name, ",", sizeof(fstring))) {
496 if (strequal(name, domain))
503 /* Is this a domain which we may assume no DOMAIN\ prefix? */
505 static BOOL assume_domain(const char *domain) {
506 if ((lp_winbind_use_default_domain()
507 || lp_winbind_trusted_domains_only()) &&
508 strequal(lp_workgroup(), domain))
511 if (strequal(get_global_sam_name(), domain))
517 /* Parse a string of the form DOMAIN/user into a domain and a user */
519 BOOL parse_domain_user(const char *domuser, fstring domain, fstring user)
521 char *p = strchr(domuser,*lp_winbind_separator());
524 fstrcpy(user, domuser);
526 if ( assume_domain(lp_workgroup())) {
527 fstrcpy(domain, lp_workgroup());
528 } else if (assume_domain(get_global_sam_name())) {
529 fstrcpy( domain, get_global_sam_name() );
531 fstrcpy( domain, "");
536 fstrcpy(domain, domuser);
537 domain[PTR_DIFF(p, domuser)] = 0;
546 Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and
547 'winbind separator' options.
549 - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is
552 If we are a PDC or BDC, and this is for our domain, do likewise.
554 Also, if omit DOMAIN if 'winbind trusted domains only = true', as the
555 username is then unqualified in unix
558 void fill_domain_username(fstring name, const char *domain, const char *user)
560 if (assume_domain(domain)) {
561 strlcpy(name, user, sizeof(fstring));
563 slprintf(name, sizeof(fstring) - 1, "%s%s%s",
564 domain, lp_winbind_separator(),
570 * Winbindd socket accessor functions
573 char *get_winbind_priv_pipe_dir(void)
575 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
578 /* Open the winbindd socket */
580 static int _winbindd_socket = -1;
581 static int _winbindd_priv_socket = -1;
583 int open_winbindd_socket(void)
585 if (_winbindd_socket == -1) {
586 _winbindd_socket = create_pipe_sock(
587 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755);
588 DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n",
592 return _winbindd_socket;
595 int open_winbindd_priv_socket(void)
597 if (_winbindd_priv_socket == -1) {
598 _winbindd_priv_socket = create_pipe_sock(
599 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
600 DEBUG(10, ("open_winbindd_priv_socket: opened socket fd %d\n",
601 _winbindd_priv_socket));
604 return _winbindd_priv_socket;
607 /* Close the winbindd socket */
609 void close_winbindd_socket(void)
611 if (_winbindd_socket != -1) {
612 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
614 close(_winbindd_socket);
615 _winbindd_socket = -1;
617 if (_winbindd_priv_socket != -1) {
618 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
619 _winbindd_priv_socket));
620 close(_winbindd_priv_socket);
621 _winbindd_priv_socket = -1;
626 * Client list accessor functions
629 static struct winbindd_cli_state *_client_list;
630 static int _num_clients;
632 /* Return list of all connected clients */
634 struct winbindd_cli_state *winbindd_client_list(void)
639 /* Add a connection to the list */
641 void winbindd_add_client(struct winbindd_cli_state *cli)
643 DLIST_ADD(_client_list, cli);
647 /* Remove a client from the list */
649 void winbindd_remove_client(struct winbindd_cli_state *cli)
651 DLIST_REMOVE(_client_list, cli);
655 /* Close all open clients */
657 void winbindd_kill_all_clients(void)
659 struct winbindd_cli_state *cl = winbindd_client_list();
661 DEBUG(10, ("winbindd_kill_all_clients: going postal\n"));
664 struct winbindd_cli_state *next;
667 winbindd_remove_client(cl);
672 /* Return number of open clients */
674 int winbindd_num_clients(void)
679 /* Help with RID -> SID conversion */
681 DOM_SID *rid_to_talloced_sid(struct winbindd_domain *domain,
686 sid = talloc(mem_ctx, sizeof(*sid));
688 smb_panic("rid_to_to_talloced_sid: talloc for DOM_SID failed!\n");
690 sid_copy(sid, &domain->sid);
691 sid_append_rid(sid, rid);
695 /*****************************************************************************
696 For idmap conversion: convert one record to new format
697 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
699 *****************************************************************************/
700 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
702 struct winbindd_domain *domain;
709 BOOL *failed = (BOOL *)state;
711 DEBUG(10,("Converting %s\n", key.dptr));
713 p = strchr(key.dptr, '/');
718 fstrcpy(dom_name, key.dptr);
721 domain = find_domain_from_name(dom_name);
722 if (domain == NULL) {
723 /* We must delete the old record. */
724 DEBUG(0,("Unable to find domain %s\n", dom_name ));
725 DEBUG(0,("deleting record %s\n", key.dptr ));
727 if (tdb_delete(tdb, key) != 0) {
728 DEBUG(0, ("Unable to delete record %s\n", key.dptr));
738 sid_copy(&sid, &domain->sid);
739 sid_append_rid(&sid, rid);
741 sid_to_string(keystr, &sid);
743 key2.dsize = strlen(keystr) + 1;
745 if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
746 DEBUG(0,("Unable to add record %s\n", key2.dptr ));
751 if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
752 DEBUG(0,("Unable to update record %s\n", data.dptr ));
757 if (tdb_delete(tdb, key) != 0) {
758 DEBUG(0,("Unable to delete record %s\n", key.dptr ));
766 /* These definitions are from sam/idmap_tdb.c. Replicated here just
767 out of laziness.... :-( */
769 /* High water mark keys */
770 #define HWM_GROUP "GROUP HWM"
771 #define HWM_USER "USER HWM"
773 /* idmap version determines auto-conversion */
774 #define IDMAP_VERSION 2
777 /*****************************************************************************
778 Convert the idmap database from an older version.
779 *****************************************************************************/
781 static BOOL idmap_convert(const char *idmap_name)
784 BOOL bigendianheader;
786 TDB_CONTEXT *idmap_tdb;
788 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
791 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
795 bigendianheader = (idmap_tdb->flags & TDB_BIGENDIAN) ? True : False;
797 vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
799 if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
800 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
802 * high and low records were created on a
803 * big endian machine and will need byte-reversing.
808 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
813 wm = server_state.uid_low;
816 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
817 DEBUG(0, ("idmap_convert: Unable to byteswap user hwm in idmap database\n"));
818 tdb_close(idmap_tdb);
822 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
826 wm = server_state.gid_low;
829 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
830 DEBUG(0, ("idmap_convert: Unable to byteswap group hwm in idmap database\n"));
831 tdb_close(idmap_tdb);
836 /* the old format stored as DOMAIN/rid - now we store the SID direct */
837 tdb_traverse(idmap_tdb, convert_fn, &failed);
840 DEBUG(0, ("Problem during conversion\n"));
841 tdb_close(idmap_tdb);
845 if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
846 DEBUG(0, ("idmap_convert: Unable to dtore idmap version in databse\n"));
847 tdb_close(idmap_tdb);
851 tdb_close(idmap_tdb);
855 /*****************************************************************************
856 Convert the idmap database from an older version if necessary
857 *****************************************************************************/
859 BOOL winbindd_upgrade_idmap(void)
863 SMB_STRUCT_STAT stbuf;
864 TDB_CONTEXT *idmap_tdb;
866 pstrcpy(idmap_name, lock_path("winbindd_idmap.tdb"));
868 if (!file_exist(idmap_name, &stbuf)) {
869 /* nothing to convert return */
873 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
876 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
880 if (tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION") == IDMAP_VERSION) {
881 /* nothing to convert return */
882 tdb_close(idmap_tdb);
886 /* backup_tdb expects the tdb not to be open */
887 tdb_close(idmap_tdb);
889 DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
891 pstrcpy(backup_name, idmap_name);
892 pstrcat(backup_name, ".bak");
894 if (backup_tdb(idmap_name, backup_name) != 0) {
895 DEBUG(0, ("Could not backup idmap database\n"));
899 return idmap_convert(idmap_name);
902 /*******************************************************************
903 wrapper around retrieving the trust account password
904 *******************************************************************/
906 BOOL get_trust_pw(const char *domain, uint8 ret_pwd[16],
907 time_t *pass_last_set_time, uint32 *channel)
912 /* if we are a DC and this is not our domain, then lookup an account
913 for the domain trust */
915 if ( IS_DC && !strequal(domain, lp_workgroup()) && lp_allow_trusted_domains() )
917 if ( !secrets_fetch_trusted_domain_password(domain, &pwd, &sid,
918 pass_last_set_time) )
920 DEBUG(0, ("get_trust_pw: could not fetch trust account "
921 "password for trusted domain %s\n", domain));
925 *channel = SEC_CHAN_DOMAIN;
926 E_md4hash(pwd, ret_pwd);
931 else /* just get the account for our domain (covers
932 ROLE_DOMAIN_MEMBER as well */
934 /* get the machine trust account for our domain */
936 if ( !secrets_fetch_trust_account_password (lp_workgroup(), ret_pwd,
937 pass_last_set_time, channel) )
939 DEBUG(0, ("get_trust_pw: could not fetch trust account "
940 "password for my domain %s\n", domain));