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 /* We can't call domain_list() as this function is called from
85 init_domain_list() and we'll get stuck in a loop. */
86 for (domain = _domain_list; domain; domain = domain->next) {
87 if (strcasecmp(domain_name, domain->name) == 0 ||
88 strcasecmp(domain_name, domain->alt_name) == 0) {
91 if (alt_name && *alt_name) {
92 if (strcasecmp(alt_name, domain->name) == 0 ||
93 strcasecmp(alt_name, domain->alt_name) == 0) {
99 /* Create new domain entry */
101 if ((domain = (struct winbindd_domain *)
102 malloc(sizeof(*domain))) == NULL)
107 ZERO_STRUCTP(domain);
109 /* prioritise the short name */
110 if (strchr_m(domain_name, '.') && alt_name && *alt_name) {
111 fstrcpy(domain->name, alt_name);
112 fstrcpy(domain->alt_name, domain_name);
114 fstrcpy(domain->name, domain_name);
116 fstrcpy(domain->alt_name, alt_name);
120 domain->methods = methods;
121 domain->sequence_number = DOM_SEQUENCE_NONE;
122 domain->last_seq_check = 0;
124 sid_copy(&domain->sid, sid);
127 /* see if this is a native mode win2k domain, but only for our own domain */
129 if ( lp_server_role() != ROLE_DOMAIN_PDC && strequal( lp_workgroup(), domain_name) ) {
130 domain->native_mode = cm_check_for_native_mode_win2k( domain_name );
131 DEBUG(3,("add_trusted_domain: %s is a %s mode domain\n", domain_name,
132 domain->native_mode ? "native" : "mixed" ));
135 /* Link to domain list */
136 DLIST_ADD(_domain_list, domain);
138 DEBUG(1,("Added domain %s %s %s\n",
139 domain->name, domain->alt_name,
140 sid?sid_string_static(&domain->sid):""));
147 rescan our domains looking for new trusted domains
149 void rescan_trusted_domains(BOOL force)
151 struct winbindd_domain *domain;
153 static time_t last_scan;
154 time_t t = time(NULL);
156 /* trusted domains might be disabled */
157 if (!lp_allow_trusted_domains()) {
161 /* Only rescan every few minutes but force if necessary */
163 if (((unsigned)(t - last_scan) < WINBINDD_RESCAN_FREQ) && !force)
168 DEBUG(1, ("scanning trusted domain list\n"));
170 if (!(mem_ctx = talloc_init("init_domain_list")))
173 for (domain = _domain_list; domain; domain = domain->next) {
181 result = domain->methods->trusted_domains(domain, mem_ctx, &num_domains,
182 &names, &alt_names, &dom_sids);
183 if (!NT_STATUS_IS_OK(result)) {
187 /* Add each domain to the trusted domain list. Each domain inherits
188 the access methods of its parent */
189 for(i = 0; i < num_domains; i++) {
190 DEBUG(10,("Found domain %s\n", names[i]));
191 add_trusted_domain(names[i], alt_names?alt_names[i]:NULL,
192 domain->methods, &dom_sids[i]);
194 /* store trusted domain in the cache */
195 trustdom_cache_store(names[i], alt_names ? alt_names[i] : NULL,
196 &dom_sids[i], t + WINBINDD_RESCAN_FREQ);
200 talloc_destroy(mem_ctx);
203 /* Look up global info for the winbind daemon */
204 BOOL init_domain_list(void)
206 extern struct winbindd_methods cache_methods;
207 struct winbindd_domain *domain;
209 /* Free existing list */
212 /* Add ourselves as the first entry */
213 domain = add_trusted_domain(lp_workgroup(), NULL, &cache_methods, NULL);
215 if (!secrets_fetch_domain_sid(domain->name, &domain->sid)) {
216 DEBUG(1, ("Could not fetch sid for our domain %s\n",
221 /* get any alternate name for the primary domain */
222 cache_methods.alternate_name(domain);
224 /* do an initial scan for trusted domains */
225 rescan_trusted_domains(True);
230 /* Given a domain name, return the struct winbindd domain info for it
231 if it is actually working. */
233 struct winbindd_domain *find_domain_from_name(const char *domain_name)
235 struct winbindd_domain *domain;
237 /* Search through list */
239 for (domain = domain_list(); domain != NULL; domain = domain->next) {
240 if (strequal(domain_name, domain->name) ||
241 (domain->alt_name[0] && strequal(domain_name, domain->alt_name)))
250 /* Given a domain sid, return the struct winbindd domain info for it */
252 struct winbindd_domain *find_domain_from_sid(DOM_SID *sid)
254 struct winbindd_domain *domain;
256 /* Search through list */
258 for (domain = domain_list(); domain != NULL; domain = domain->next) {
259 if (sid_compare_domain(sid, &domain->sid) == 0)
268 /* Lookup a sid in a domain from a name */
270 BOOL winbindd_lookup_sid_by_name(struct winbindd_domain *domain,
271 const char *name, DOM_SID *sid,
272 enum SID_NAME_USE *type)
276 /* Don't bother with machine accounts */
278 if (name[strlen(name) - 1] == '$')
281 mem_ctx = talloc_init("lookup_sid_by_name for %s\n", name);
286 result = domain->methods->name_to_sid(domain, mem_ctx, name, sid, type);
288 talloc_destroy(mem_ctx);
290 /* Return rid and type if lookup successful */
291 if (!NT_STATUS_IS_OK(result)) {
292 *type = SID_NAME_UNKNOWN;
295 return NT_STATUS_IS_OK(result);
299 * @brief Lookup a name in a domain from a sid.
301 * @param sid Security ID you want to look up.
303 * @param name On success, set to the name corresponding to @p sid.
305 * @param dom_name On success, set to the 'domain name' corresponding to @p sid.
307 * @param type On success, contains the type of name: alias, group or
310 * @retval True if the name exists, in which case @p name and @p type
311 * are set, otherwise False.
313 BOOL winbindd_lookup_name_by_sid(DOM_SID *sid,
316 enum SID_NAME_USE *type)
322 struct winbindd_domain *domain;
324 domain = find_domain_from_sid(sid);
327 DEBUG(1,("Can't find domain from sid\n"));
333 if (!(mem_ctx = talloc_init("winbindd_lookup_name_by_sid")))
336 result = domain->methods->sid_to_name(domain, mem_ctx, sid, &names, type);
338 /* Return name and type if successful */
340 if ((rv = NT_STATUS_IS_OK(result))) {
341 fstrcpy(dom_name, domain->name);
342 fstrcpy(name, names);
344 *type = SID_NAME_UNKNOWN;
345 fstrcpy(name, name_deadbeef);
348 talloc_destroy(mem_ctx);
354 /* Free state information held for {set,get,end}{pw,gr}ent() functions */
356 void free_getent_state(struct getent_state *state)
358 struct getent_state *temp;
360 /* Iterate over state list */
364 while(temp != NULL) {
365 struct getent_state *next;
367 /* Free sam entries then list entry */
369 SAFE_FREE(state->sam_entries);
370 DLIST_REMOVE(state, state);
378 /* Parse winbindd related parameters */
380 BOOL winbindd_param_init(void)
382 /* Parse winbind uid and winbind_gid parameters */
384 if (!lp_winbind_uid(&server_state.uid_low, &server_state.uid_high)) {
385 DEBUG(0, ("winbind uid range missing or invalid\n"));
389 if (!lp_winbind_gid(&server_state.gid_low, &server_state.gid_high)) {
390 DEBUG(0, ("winbind gid range missing or invalid\n"));
397 /* Check if a domain is present in a comma-separated list of domains */
399 BOOL check_domain_env(char *domain_env, char *domain)
402 const char *tmp = domain_env;
404 while(next_token(&tmp, name, ",", sizeof(fstring))) {
405 if (strequal(name, domain))
412 /* Parse a string of the form DOMAIN/user into a domain and a user */
414 BOOL parse_domain_user(const char *domuser, fstring domain, fstring user)
416 char *p = strchr(domuser,*lp_winbind_separator());
418 if (!(p || lp_winbind_use_default_domain()))
421 if(!p && lp_winbind_use_default_domain()) {
422 fstrcpy(user, domuser);
423 fstrcpy(domain, lp_workgroup());
426 fstrcpy(domain, domuser);
427 domain[PTR_DIFF(p, domuser)] = 0;
434 Fill DOMAIN\\USERNAME entry accounting 'winbind use default domain' and
435 'winbind separator' options.
437 - omit DOMAIN when 'winbind use default domain = true' and DOMAIN is
441 void fill_domain_username(fstring name, const char *domain, const char *user)
443 if(lp_winbind_use_default_domain() &&
444 !strcmp(lp_workgroup(), domain)) {
445 strlcpy(name, user, sizeof(fstring));
447 slprintf(name, sizeof(fstring) - 1, "%s%s%s",
448 domain, lp_winbind_separator(),
454 * Winbindd socket accessor functions
457 char *get_winbind_priv_pipe_dir(void)
459 return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
462 /* Open the winbindd socket */
464 static int _winbindd_socket = -1;
465 static int _winbindd_priv_socket = -1;
467 int open_winbindd_socket(void)
469 if (_winbindd_socket == -1) {
470 _winbindd_socket = create_pipe_sock(
471 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME, 0755);
472 DEBUG(10, ("open_winbindd_socket: opened socket fd %d\n",
476 return _winbindd_socket;
479 int open_winbindd_priv_socket(void)
481 if (_winbindd_priv_socket == -1) {
482 _winbindd_priv_socket = create_pipe_sock(
483 get_winbind_priv_pipe_dir(), WINBINDD_SOCKET_NAME, 0750);
484 DEBUG(10, ("open_winbindd_priv_socket: opened socket fd %d\n",
485 _winbindd_priv_socket));
488 return _winbindd_priv_socket;
491 /* Close the winbindd socket */
493 void close_winbindd_socket(void)
495 if (_winbindd_socket != -1) {
496 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
498 close(_winbindd_socket);
499 _winbindd_socket = -1;
501 if (_winbindd_priv_socket != -1) {
502 DEBUG(10, ("close_winbindd_socket: closing socket fd %d\n",
503 _winbindd_priv_socket));
504 close(_winbindd_priv_socket);
505 _winbindd_priv_socket = -1;
510 * Client list accessor functions
513 static struct winbindd_cli_state *_client_list;
514 static int _num_clients;
516 /* Return list of all connected clients */
518 struct winbindd_cli_state *winbindd_client_list(void)
523 /* Add a connection to the list */
525 void winbindd_add_client(struct winbindd_cli_state *cli)
527 DLIST_ADD(_client_list, cli);
531 /* Remove a client from the list */
533 void winbindd_remove_client(struct winbindd_cli_state *cli)
535 DLIST_REMOVE(_client_list, cli);
539 /* Close all open clients */
541 void winbindd_kill_all_clients(void)
543 struct winbindd_cli_state *cl = winbindd_client_list();
545 DEBUG(10, ("winbindd_kill_all_clients: going postal\n"));
548 struct winbindd_cli_state *next;
551 winbindd_remove_client(cl);
556 /* Return number of open clients */
558 int winbindd_num_clients(void)
563 /* Help with RID -> SID conversion */
565 DOM_SID *rid_to_talloced_sid(struct winbindd_domain *domain,
570 sid = talloc(mem_ctx, sizeof(*sid));
572 smb_panic("rid_to_to_talloced_sid: talloc for DOM_SID failed!\n");
574 sid_copy(sid, &domain->sid);
575 sid_append_rid(sid, rid);