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.
28 #define DBGC_CLASS DBGC_WINBIND
31 * @file winbindd_util.c
33 * Winbind daemon for NT domain authentication nss module.
38 * Used to clobber name fields that have an undefined value.
40 * Correct code should never look at a field that has this value.
43 static const fstring name_deadbeef = "<deadbeef>";
45 /* The list of trusted domains. Note that the list can be deleted and
46 recreated using the init_domain_list() function so pointers to
47 individual winbindd_domain structures cannot be made. Keep a copy of
48 the domain name instead. */
50 static struct winbindd_domain *_domain_list;
53 When was the last scan of trusted domains done?
58 static time_t last_trustdom_scan;
60 struct winbindd_domain *domain_list(void)
65 if (!init_domain_list())
71 /* Free all entries in the trusted domain list */
73 void free_domain_list(void)
75 struct winbindd_domain *domain = _domain_list;
78 struct winbindd_domain *next = domain->next;
80 DLIST_REMOVE(_domain_list, domain);
86 static BOOL is_internal_domain(const DOM_SID *sid)
90 if (sid_equal(sid, get_global_sam_sid()))
93 string_to_sid(&tmp_sid, "S-1-5-32");
94 if (sid_equal(sid, &tmp_sid))
101 /* Add a trusted domain to our list of domains */
102 static struct winbindd_domain *add_trusted_domain(const char *domain_name, const char *alt_name,
103 struct winbindd_methods *methods,
106 struct winbindd_domain *domain;
107 const char *alternative_name = NULL;
108 static const DOM_SID null_sid;
110 /* ignore alt_name if we are not in an AD domain */
112 if ( (lp_security() == SEC_ADS) && alt_name && *alt_name) {
113 alternative_name = alt_name;
116 /* We can't call domain_list() as this function is called from
117 init_domain_list() and we'll get stuck in a loop. */
118 for (domain = _domain_list; domain; domain = domain->next) {
119 if (strequal(domain_name, domain->name) ||
120 strequal(domain_name, domain->alt_name)) {
123 if (alternative_name && *alternative_name) {
124 if (strequal(alternative_name, domain->name) ||
125 strequal(alternative_name, domain->alt_name)) {
130 if (sid_equal(sid, &null_sid) ) {
132 } else if (sid_equal(sid, &domain->sid)) {
138 /* Create new domain entry */
140 if ((domain = (struct winbindd_domain *)malloc(sizeof(*domain))) == NULL)
145 ZERO_STRUCTP(domain);
147 /* prioritise the short name */
148 if (strchr_m(domain_name, '.') && alternative_name && *alternative_name) {
149 fstrcpy(domain->name, alternative_name);
150 fstrcpy(domain->alt_name, domain_name);
152 fstrcpy(domain->name, domain_name);
153 if (alternative_name) {
154 fstrcpy(domain->alt_name, alternative_name);
158 domain->methods = methods;
159 domain->backend = NULL;
160 domain->internal = is_internal_domain(sid);
161 domain->sequence_number = DOM_SEQUENCE_NONE;
162 domain->last_seq_check = 0;
164 sid_copy(&domain->sid, sid);
167 /* set flags about native_mode, active_directory */
169 if (!domain->internal)
170 set_dc_type_and_flags( domain );
172 DEBUG(3,("add_trusted_domain: %s is an %s %s domain\n", domain->name,
173 domain->active_directory ? "ADS" : "NT4",
174 domain->native_mode ? "native mode" :
175 ((domain->active_directory && !domain->native_mode) ? "mixed mode" : "")));
177 /* Link to domain list */
178 DLIST_ADD(_domain_list, domain);
180 DEBUG(1,("Added domain %s %s %s\n",
181 domain->name, domain->alt_name,
182 &domain->sid?sid_string_static(&domain->sid):""));
187 /********************************************************************
188 rescan our domains looking for new trusted domains
189 ********************************************************************/
191 static void add_trusted_domains( struct winbindd_domain *domain )
199 DOM_SID *dom_sids, null_sid;
201 struct winbindd_domain *new_domain;
203 /* trusted domains might be disabled */
204 if (!lp_allow_trusted_domains()) {
208 DEBUG(5, ("scanning trusted domain list\n"));
210 if (!(mem_ctx = talloc_init("init_domain_list")))
213 ZERO_STRUCTP(&null_sid);
217 /* ask the DC what domains it trusts */
219 result = domain->methods->trusted_domains(domain, mem_ctx, (unsigned int *)&num_domains,
220 &names, &alt_names, &dom_sids);
222 if ( NT_STATUS_IS_OK(result) ) {
224 /* Add each domain to the trusted domain list */
226 for(i = 0; i < num_domains; i++) {
227 DEBUG(10,("Found domain %s\n", names[i]));
228 add_trusted_domain(names[i], alt_names?alt_names[i]:NULL,
229 domain->methods, &dom_sids[i]);
231 /* if the SID was empty, we better set it now */
233 if ( sid_equal(&dom_sids[i], &null_sid) ) {
235 new_domain = find_domain_from_name(names[i]);
237 /* this should never happen */
239 DEBUG(0,("rescan_trust_domains: can't find the domain I just added! [%s]\n",
244 /* call the cache method; which will operate on the winbindd_domain \
245 passed in and choose either rpc or ads as appropriate */
247 result = domain->methods->domain_sid( new_domain, &new_domain->sid );
249 if ( NT_STATUS_IS_OK(result) )
250 sid_copy( &dom_sids[i], &new_domain->sid );
253 /* store trusted domain in the cache */
254 trustdom_cache_store(names[i], alt_names ? alt_names[i] : NULL,
255 &dom_sids[i], t + WINBINDD_RESCAN_FREQ);
259 talloc_destroy(mem_ctx);
262 /********************************************************************
263 Periodically we need to refresh the trusted domain cache for smbd
264 ********************************************************************/
266 void rescan_trusted_domains( void )
268 time_t now = time(NULL);
269 struct winbindd_domain *mydomain = NULL;
271 /* see if the time has come... */
273 if ( (now > last_trustdom_scan) && ((now-last_trustdom_scan) < WINBINDD_RESCAN_FREQ) )
276 if ( (mydomain = find_our_domain()) == NULL ) {
277 DEBUG(0,("rescan_trusted_domains: Can't find my own domain!\n"));
281 /* this will only add new domains we didn't already know about */
283 add_trusted_domains( mydomain );
285 last_trustdom_scan = now;
290 /* Look up global info for the winbind daemon */
291 BOOL init_domain_list(void)
293 extern struct winbindd_methods cache_methods;
294 struct winbindd_domain *domain;
296 /* Free existing list */
299 /* Add ourselves as the first entry. */
301 domain = add_trusted_domain( lp_workgroup(), lp_realm(), &cache_methods, NULL);
303 domain->primary = True;
305 /* get any alternate name for the primary domain */
307 cache_methods.alternate_name(domain);
309 /* now we have the correct netbios (short) domain name */
312 set_global_myworkgroup( domain->name );
314 if (!secrets_fetch_domain_sid(domain->name, &domain->sid)) {
315 DEBUG(1, ("Could not fetch sid for our domain %s\n",
320 /* do an initial scan for trusted domains */
321 add_trusted_domains(domain);
323 /* Don't expand aliases if not explicitly activated -- for now */
324 /* we don't support windows local nested groups if we are a DC.
325 refer to to sid_to_gid() in the smbd server code to see why
329 if (lp_winbind_nested_groups() || IS_DC) {
331 /* Add our local SAM domains */
333 extern struct winbindd_methods passdb_methods;
334 struct winbindd_domain *dom;
336 string_to_sid(&sid, "S-1-5-32");
338 dom = add_trusted_domain("BUILTIN", NULL, &passdb_methods,
341 dom = add_trusted_domain(get_global_sam_name(), NULL,
343 get_global_sam_sid());
346 /* avoid rescanning this right away */
347 last_trustdom_scan = time(NULL);
352 * Given a domain name, return the struct winbindd domain info for it
354 * @note Do *not* pass lp_workgroup() to this function. domain_list
355 * may modify it's value, and free that pointer. Instead, our local
356 * domain may be found by calling find_our_domain().
360 * @return The domain structure for the named domain, if it is working.
363 struct winbindd_domain *find_domain_from_name(const char *domain_name)
365 struct winbindd_domain *domain;
367 /* Search through list */
369 for (domain = domain_list(); domain != NULL; domain = domain->next) {
370 if (strequal(domain_name, domain->name) ||
371 (domain->alt_name[0] && strequal(domain_name, domain->alt_name))) {
381 /* Given a domain sid, return the struct winbindd domain info for it */
383 struct winbindd_domain *find_domain_from_sid(const DOM_SID *sid)
385 struct winbindd_domain *domain;
387 /* Search through list */
389 for (domain = domain_list(); domain != NULL; domain = domain->next) {
390 if (sid_compare_domain(sid, &domain->sid) == 0)
399 /* Given a domain sid, return the struct winbindd domain info for it */
401 struct winbindd_domain *find_our_domain(void)
403 struct winbindd_domain *domain;
405 /* Search through list */
407 for (domain = domain_list(); domain != NULL; domain = domain->next) {
417 /* Lookup a sid in a domain from a name */
419 BOOL winbindd_lookup_sid_by_name(struct winbindd_domain *domain,
420 const char *name, DOM_SID *sid,
421 enum SID_NAME_USE *type)
426 mem_ctx = talloc_init("lookup_sid_by_name for %s\n", name);
431 result = domain->methods->name_to_sid(domain, mem_ctx, name, sid, type);
433 talloc_destroy(mem_ctx);
435 /* Return rid and type if lookup successful */
436 if (!NT_STATUS_IS_OK(result)) {
437 *type = SID_NAME_UNKNOWN;
440 return NT_STATUS_IS_OK(result);
444 * @brief Lookup a name in a domain from a sid.
446 * @param sid Security ID you want to look up.
447 * @param name On success, set to the name corresponding to @p sid.
448 * @param dom_name On success, set to the 'domain name' corresponding to @p sid.
449 * @param type On success, contains the type of name: alias, group or
451 * @retval True if the name exists, in which case @p name and @p type
452 * are set, otherwise False.
454 BOOL winbindd_lookup_name_by_sid(DOM_SID *sid,
457 enum SID_NAME_USE *type)
463 struct winbindd_domain *domain;
465 domain = find_domain_from_sid(sid);
468 DEBUG(1,("Can't find domain from sid\n"));
474 if (!(mem_ctx = talloc_init("winbindd_lookup_name_by_sid")))
477 result = domain->methods->sid_to_name(domain, mem_ctx, sid, &names, type);
479 /* Return name and type if successful */
481 if ((rv = NT_STATUS_IS_OK(result))) {
482 fstrcpy(dom_name, domain->name);
483 fstrcpy(name, names);
485 *type = SID_NAME_UNKNOWN;
486 fstrcpy(name, name_deadbeef);
489 talloc_destroy(mem_ctx);
495 /* Free state information held for {set,get,end}{pw,gr}ent() functions */
497 void free_getent_state(struct getent_state *state)
499 struct getent_state *temp;
501 /* Iterate over state list */
505 while(temp != NULL) {
506 struct getent_state *next;
508 /* Free sam entries then list entry */
510 SAFE_FREE(state->sam_entries);
511 DLIST_REMOVE(state, state);
519 /* Parse winbindd related parameters */
521 BOOL winbindd_param_init(void)
523 /* Parse winbind uid and winbind_gid parameters */
525 if (!lp_idmap_uid(&server_state.uid_low, &server_state.uid_high)) {
526 DEBUG(0, ("winbindd: idmap uid range missing or invalid\n"));
527 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
531 if (!lp_idmap_gid(&server_state.gid_low, &server_state.gid_high)) {
532 DEBUG(0, ("winbindd: idmap gid range missing or invalid\n"));
533 DEBUG(0, ("winbindd: cannot continue, exiting.\n"));
540 /* Check if a domain is present in a comma-separated list of domains */
542 BOOL check_domain_env(char *domain_env, char *domain)
545 const char *tmp = domain_env;
547 while(next_token(&tmp, name, ",", sizeof(fstring))) {
548 if (strequal(name, domain))
555 /* Is this a domain which we may assume no DOMAIN\ prefix? */
557 static BOOL assume_domain(const char *domain) {
558 if ((lp_winbind_use_default_domain()
559 || lp_winbind_trusted_domains_only()) &&
560 strequal(lp_workgroup(), domain))
563 if (strequal(get_global_sam_name(), domain))
569 /* Parse a string of the form DOMAIN/user into a domain and a user */
571 BOOL parse_domain_user(const char *domuser, fstring domain, fstring user)
573 char *p = strchr(domuser,*lp_winbind_separator());
576 fstrcpy(user, domuser);
578 if ( assume_domain(lp_workgroup())) {
579 fstrcpy(domain, lp_workgroup());
581 fstrcpy( domain, get_global_sam_name() );
586 fstrcpy(domain, domuser);
587 domain[PTR_DIFF(p, domuser)] = 0;
596 Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and
597 'winbind separator' options.
599 - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is
602 If we are a PDC or BDC, and this is for our domain, do likewise.
604 Also, if omit DOMAIN if 'winbind trusted domains only = true', as the
605 username is then unqualified in unix
608 void fill_domain_username(fstring name, const char *domain, const char *user)
610 if (assume_domain(domain)) {
611 strlcpy(name, user, sizeof(fstring));
613 slprintf(name, sizeof(fstring) - 1, "%s%s%s",
614 domain, lp_winbind_separator(),
620 * Winbindd socket accessor functions
623 char *get_winbind_priv_pipe_dir(void)
625 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
628 /* Open the winbindd socket */
630 static int _winbindd_socket = -1;
631 static int _winbindd_priv_socket = -1;
633 int open_winbindd_socket(void)
635 if (_winbindd_socket == -1) {
636 _winbindd_socket = create_pipe_sock(
637 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755);
638 DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n",
642 return _winbindd_socket;
645 int open_winbindd_priv_socket(void)
647 if (_winbindd_priv_socket == -1) {
648 _winbindd_priv_socket = create_pipe_sock(
649 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
650 DEBUG(10, ("open_winbindd_priv_socket: opened socket fd %d\n",
651 _winbindd_priv_socket));
654 return _winbindd_priv_socket;
657 /* Close the winbindd socket */
659 void close_winbindd_socket(void)
661 if (_winbindd_socket != -1) {
662 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
664 close(_winbindd_socket);
665 _winbindd_socket = -1;
667 if (_winbindd_priv_socket != -1) {
668 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
669 _winbindd_priv_socket));
670 close(_winbindd_priv_socket);
671 _winbindd_priv_socket = -1;
676 * Client list accessor functions
679 static struct winbindd_cli_state *_client_list;
680 static int _num_clients;
682 /* Return list of all connected clients */
684 struct winbindd_cli_state *winbindd_client_list(void)
689 /* Add a connection to the list */
691 void winbindd_add_client(struct winbindd_cli_state *cli)
693 DLIST_ADD(_client_list, cli);
697 /* Remove a client from the list */
699 void winbindd_remove_client(struct winbindd_cli_state *cli)
701 DLIST_REMOVE(_client_list, cli);
705 /* Close all open clients */
707 void winbindd_kill_all_clients(void)
709 struct winbindd_cli_state *cl = winbindd_client_list();
711 DEBUG(10, ("winbindd_kill_all_clients: going postal\n"));
714 struct winbindd_cli_state *next;
717 winbindd_remove_client(cl);
722 /* Return number of open clients */
724 int winbindd_num_clients(void)
729 /* Help with RID -> SID conversion */
731 DOM_SID *rid_to_talloced_sid(struct winbindd_domain *domain,
736 sid = talloc(mem_ctx, sizeof(*sid));
738 smb_panic("rid_to_to_talloced_sid: talloc for DOM_SID failed!\n");
740 sid_copy(sid, &domain->sid);
741 sid_append_rid(sid, rid);
745 /*****************************************************************************
746 For idmap conversion: convert one record to new format
747 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
749 *****************************************************************************/
750 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
752 struct winbindd_domain *domain;
759 BOOL *failed = (BOOL *)state;
761 DEBUG(10,("Converting %s\n", key.dptr));
763 p = strchr(key.dptr, '/');
768 fstrcpy(dom_name, key.dptr);
771 domain = find_domain_from_name(dom_name);
772 if (domain == NULL) {
773 /* We must delete the old record. */
774 DEBUG(0,("Unable to find domain %s\n", dom_name ));
775 DEBUG(0,("deleting record %s\n", key.dptr ));
777 if (tdb_delete(tdb, key) != 0) {
778 DEBUG(0, ("Unable to delete record %s\n", key.dptr));
788 sid_copy(&sid, &domain->sid);
789 sid_append_rid(&sid, rid);
791 sid_to_string(keystr, &sid);
793 key2.dsize = strlen(keystr) + 1;
795 if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
796 DEBUG(0,("Unable to add record %s\n", key2.dptr ));
801 if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
802 DEBUG(0,("Unable to update record %s\n", data.dptr ));
807 if (tdb_delete(tdb, key) != 0) {
808 DEBUG(0,("Unable to delete record %s\n", key.dptr ));
816 /* These definitions are from sam/idmap_tdb.c. Replicated here just
817 out of laziness.... :-( */
819 /* High water mark keys */
820 #define HWM_GROUP "GROUP HWM"
821 #define HWM_USER "USER HWM"
823 /* idmap version determines auto-conversion */
824 #define IDMAP_VERSION 2
827 /*****************************************************************************
828 Convert the idmap database from an older version.
829 *****************************************************************************/
831 static BOOL idmap_convert(const char *idmap_name)
834 BOOL bigendianheader;
836 TDB_CONTEXT *idmap_tdb;
838 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
841 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
845 bigendianheader = (idmap_tdb->flags & TDB_BIGENDIAN) ? True : False;
847 vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
849 if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
850 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
852 * high and low records were created on a
853 * big endian machine and will need byte-reversing.
858 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
863 wm = server_state.uid_low;
866 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
867 DEBUG(0, ("idmap_convert: Unable to byteswap user hwm in idmap database\n"));
868 tdb_close(idmap_tdb);
872 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
876 wm = server_state.gid_low;
879 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
880 DEBUG(0, ("idmap_convert: Unable to byteswap group hwm in idmap database\n"));
881 tdb_close(idmap_tdb);
886 /* the old format stored as DOMAIN/rid - now we store the SID direct */
887 tdb_traverse(idmap_tdb, convert_fn, &failed);
890 DEBUG(0, ("Problem during conversion\n"));
891 tdb_close(idmap_tdb);
895 if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
896 DEBUG(0, ("idmap_convert: Unable to dtore idmap version in databse\n"));
897 tdb_close(idmap_tdb);
901 tdb_close(idmap_tdb);
905 /*****************************************************************************
906 Convert the idmap database from an older version if necessary
907 *****************************************************************************/
909 BOOL winbindd_upgrade_idmap(void)
913 SMB_STRUCT_STAT stbuf;
914 TDB_CONTEXT *idmap_tdb;
916 pstrcpy(idmap_name, lock_path("winbindd_idmap.tdb"));
918 if (!file_exist(idmap_name, &stbuf)) {
919 /* nothing to convert return */
923 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
926 DEBUG(0, ("idmap_convert: Unable to open idmap database\n"));
930 if (tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION") == IDMAP_VERSION) {
931 /* nothing to convert return */
932 tdb_close(idmap_tdb);
936 /* backup_tdb expects the tdb not to be open */
937 tdb_close(idmap_tdb);
939 DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
941 pstrcpy(backup_name, idmap_name);
942 pstrcat(backup_name, ".bak");
944 if (backup_tdb(idmap_name, backup_name) != 0) {
945 DEBUG(0, ("Could not backup idmap database\n"));
949 return idmap_convert(idmap_name);
952 /*******************************************************************
953 wrapper around retrieving the trust account password
954 *******************************************************************/
956 BOOL get_trust_pw(const char *domain, uint8 ret_pwd[16],
957 time_t *pass_last_set_time, uint32 *channel)
962 /* if we are a DC and this is not our domain, then lookup an account
963 for the domain trust */
965 if ( IS_DC && !strequal(domain, lp_workgroup()) && lp_allow_trusted_domains() )
967 if ( !secrets_fetch_trusted_domain_password(domain, &pwd, &sid,
968 pass_last_set_time) )
970 DEBUG(0, ("get_trust_pw: could not fetch trust account "
971 "password for trusted domain %s\n", domain));
975 *channel = SEC_CHAN_DOMAIN;
976 E_md4hash(pwd, ret_pwd);
981 else /* just get the account for our domain (covers
982 ROLE_DOMAIN_MEMBER as well */
984 /* get the machine trust account for our domain */
986 if ( !secrets_fetch_trust_account_password (lp_workgroup(), ret_pwd,
987 pass_last_set_time, channel) )
989 DEBUG(0, ("get_trust_pw: could not fetch trust account "
990 "password for my domain %s\n", domain));