2 Unix SMB/Netbios implementation.
4 Authenticate against a remote domain
5 Copyright (C) Andrew Tridgell 1992-1998
6 Copyright (C) Andrew Bartlett 2001
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 BOOL global_machine_password_needs_changing = False;
27 extern pstring global_myname;
29 /***********************************************************************
30 Connect to a remote machine for domain security authentication
31 given a name or IP address.
32 ***********************************************************************/
34 static BOOL connect_to_domain_password_server(struct cli_state *pcli,
35 char *server, unsigned char *trust_passwd)
37 struct in_addr dest_ip;
38 fstring remote_machine;
41 if (cli_initialise(pcli) == NULL) {
42 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
46 if (is_ipaddress(server)) {
49 /* we shouldn't have 255.255.255.255 forthe IP address of
50 a password server anyways */
51 if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) {
52 DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server));
56 if (!name_status_find("*", 0x20, 0x20, to_ip, remote_machine)) {
57 DEBUG(0, ("connect_to_domain_password_server: Can't "
58 "resolve name for IP %s\n", server));
62 fstrcpy(remote_machine, server);
65 standard_sub_basic(remote_machine);
66 strupper(remote_machine);
68 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
69 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
74 if (ismyip(dest_ip)) {
75 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
81 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
82 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
83 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
88 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
89 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
90 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
94 pcli->protocol = PROTOCOL_NT1;
96 if (!cli_negprot(pcli)) {
97 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
98 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
103 if (pcli->protocol != PROTOCOL_NT1) {
104 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
111 * Do an anonymous session setup.
114 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
115 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
116 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
121 if (!(pcli->sec_mode & 1)) {
122 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
128 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
129 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
130 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
136 * We now have an anonymous connection to IPC$ on the domain password server.
140 * Even if the connect succeeds we need to setup the netlogon
141 * pipe here. We do this as we may just have changed the domain
142 * account password on the PDC and yet we may be talking to
143 * a BDC that doesn't have this replicated yet. In this case
144 * a successful connect to a DC needs to take the netlogon connect
145 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
148 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
149 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
150 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
151 cli_nt_session_close(pcli);
157 result = cli_nt_setup_creds(pcli, trust_passwd);
159 if (!NT_STATUS_IS_OK(result)) {
160 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
161 %s. Error was : %s.\n", remote_machine, get_nt_error_msg(result)));
162 cli_nt_session_close(pcli);
171 /***********************************************************************
172 Utility function to attempt a connection to an IP address of a DC.
173 ************************************************************************/
175 static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip,
176 unsigned char *trust_passwd)
181 * Ignore addresses we have already tried.
187 if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
190 return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
193 /***********************************************************************
194 We have been asked to dynamcially determine the IP addresses of
195 the PDC and BDC's for this DOMAIN, and query them in turn.
196 ************************************************************************/
197 static BOOL find_connect_pdc(struct cli_state *pcli,
198 unsigned char *trust_passwd,
199 time_t last_change_time)
201 struct in_addr *ip_list = NULL;
204 BOOL connected_ok = False;
205 time_t time_now = time(NULL);
206 BOOL use_pdc_only = False;
209 * If the time the machine password has changed
210 * was less than an hour ago then we need to contact
211 * the PDC only, as we cannot be sure domain replication
212 * has yet taken place. Bug found by Gerald (way to go
216 if (time_now - last_change_time < 3600)
219 if (!get_dc_list(use_pdc_only, lp_workgroup(), &ip_list, &count))
223 * Firstly try and contact a PDC/BDC who has the same
224 * network address as any of our interfaces.
226 for(i = 0; i < count; i++) {
227 if(!is_local_net(ip_list[i]))
230 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
233 zero_ip(&ip_list[i]); /* Tried and failed. */
237 * Secondly try and contact a random PDC/BDC.
240 i = (sys_random() % count);
242 if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
243 zero_ip(&ip_list[i]); /* Tried and failed. */
247 * Finally go through the IP list in turn, ignoring any addresses
248 * we have already tried.
252 * Try and connect to any of the other IP addresses in the PDC/BDC list.
253 * Note that from a WINS server the #1 IP address is the PDC.
255 for(i = 0; i < count; i++) {
256 if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
267 /***********************************************************************
268 Do the same as security=server, but using NT Domain calls and a session
269 key from the machine password. If the server parameter is specified
270 use it, otherwise figure out a server from the 'password server' param.
271 ************************************************************************/
273 static NTSTATUS domain_client_validate(const auth_usersupplied_info *user_info,
275 auth_serversupplied_info **server_info,
276 char *server, unsigned char *trust_passwd,
277 time_t last_change_time)
279 fstring remote_machine;
281 NET_USER_INFO_3 info3;
282 struct cli_state cli;
284 BOOL connected_ok = False;
289 * At this point, smb_apasswd points to the lanman response to
290 * the challenge in local_challenge, and smb_ntpasswd points to
291 * the NT response to the challenge in local_challenge. Ship
292 * these over the secure channel to a domain controller and
293 * see if they were valid.
298 while (!connected_ok &&
299 next_token(&server,remote_machine,LIST_SEP,sizeof(remote_machine))) {
300 if(strequal(remote_machine, "*")) {
301 connected_ok = find_connect_pdc(&cli, trust_passwd, last_change_time);
303 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
308 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
310 return NT_STATUS_LOGON_FAILURE;
313 /* We really don't care what LUID we give the user. */
314 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
319 * If this call succeeds, we now have lots of info about the user
320 * in the info3 structure.
323 status = cli_nt_login_network(&cli, user_info, chal, smb_uid_low,
326 if (!NT_STATUS_IS_OK(status)) {
327 DEBUG(0,("domain_client_validate: unable to validate password "
328 "for user %s in domain %s to Domain controller %s. "
329 "Error was %s.\n", user_info->smb_name.str,
330 user_info->domain.str, cli.srv_name_slash,
331 get_nt_error_msg(status)));
335 /* Check DOMAIN\username first to catch winbind users, then
336 just the username for local users. */
338 asprintf(&dom_user, "%s%s%s", user_info->domain.str,
339 lp_winbind_separator(),
340 user_info->internal_username.str);
342 if (!(pass = Get_Pwnam(dom_user)))
343 pass = Get_Pwnam(user_info->internal_username.str);
348 make_server_info_pw(server_info, pass);
350 status = NT_STATUS_NO_MEMORY;
353 status = NT_STATUS_NO_SUCH_USER;
357 /* Store the user group information in the server_info returned to the caller. */
359 if (NT_STATUS_IS_OK(status) && (info3.num_groups2 != 0)) {
363 auth_serversupplied_info *pserver_info = *server_info;
365 if ((pserver_info->ptok = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
366 DEBUG(0, ("domain_client_validate: out of memory allocating rid group membership\n"));
367 status = NT_STATUS_NO_MEMORY;
368 free_server_info(server_info);
372 ptok = pserver_info->ptok;
373 ptok->num_sids = (size_t)info3.num_groups2;
375 if ((ptok->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptok->num_sids )) == NULL) {
376 DEBUG(0, ("domain_client_validate: Out of memory allocating group SIDS\n"));
377 status = NT_STATUS_NO_MEMORY;
378 free_server_info(server_info);
382 if (!secrets_fetch_domain_sid(lp_workgroup(), &domain_sid)) {
383 DEBUG(0, ("domain_client_validate: unable to fetch domain sid.\n"));
384 status = NT_STATUS_NO_MEMORY;
385 free_server_info(server_info);
389 for (i = 0; i < ptok->num_sids; i++) {
390 sid_copy(&ptok->user_sids[i], &domain_sid);
391 sid_append_rid(&ptok->user_sids[i], info3.gids[i].g_rid);
397 * We don't actually need to do this - plus it fails currently with
398 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
402 if (NT_STATUS_IS_OK(status)) {
403 if(cli_nt_logoff(&cli, &ctr) == False) {
404 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
405 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
406 status = NT_STATUS_LOGON_FAILURE;
413 /* Note - once the cli stream is shutdown the mem_ctx used
414 to allocate the other_sids and gids structures has been deleted - so
415 these pointers are no longer valid..... */
417 cli_nt_session_close(&cli);
423 /****************************************************************************
424 Check for a valid username and password in security=domain mode.
425 ****************************************************************************/
427 static NTSTATUS check_ntdomain_security(void *my_private_data,
428 const auth_usersupplied_info *user_info,
429 const auth_authsupplied_info *auth_info,
430 auth_serversupplied_info **server_info)
432 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
434 unsigned char trust_passwd[16];
435 time_t last_change_time;
437 if (!user_info || !server_info || !auth_info) {
438 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
439 return NT_STATUS_LOGON_FAILURE;
443 * Check that the requested domain is not our own machine name.
444 * If it is, we should never check the PDC here, we use our own local
448 if(is_netbios_alias_or_name(user_info->domain.str)) {
449 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
450 return NT_STATUS_LOGON_FAILURE;
456 * Get the machine account password for our primary domain
459 if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
461 DEBUG(0, ("check_domain_security: could not fetch trust account password for domain %s\n", lp_workgroup()));
463 return NT_STATUS_LOGON_FAILURE;
468 /* Test if machine password is expired and need to be changed */
469 if (time(NULL) > last_change_time + lp_machine_password_timeout())
471 global_machine_password_needs_changing = True;
475 * Treat each name in the 'password server =' line as a potential
476 * PDC/BDC. Contact each in turn and try and authenticate.
479 pserver = lp_passwordserver();
480 if (! *pserver) pserver = "*";
483 nt_status = domain_client_validate(user_info, (uchar *)auth_info->challenge.data,server_info,
484 p, trust_passwd, last_change_time);
489 BOOL auth_init_ntdomain(auth_methods **auth_method)
491 if (!make_auth_methods(auth_method)) {
495 (*auth_method)->auth = check_ntdomain_security;