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 extern int DEBUGLEVEL;
26 extern struct in_addr ipzero;
28 BOOL global_machine_password_needs_changing = False;
30 extern pstring global_myname;
32 /***********************************************************************
33 Connect to a remote machine for domain security authentication
34 given a name or IP address.
35 ***********************************************************************/
37 static BOOL connect_to_domain_password_server(struct cli_state *pcli,
38 char *server, unsigned char *trust_passwd)
40 struct in_addr dest_ip;
41 fstring remote_machine;
43 if(cli_initialise(pcli) == NULL) {
44 DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
48 if (is_ipaddress(server)) {
51 /* we shouldn't have 255.255.255.255 forthe IP address of
52 a password server anyways */
53 if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) {
54 DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server));
58 if (!name_status_find(0x20, to_ip, remote_machine)) {
59 DEBUG(0, ("connect_to_domain_password_server: Can't "
60 "resolve name for IP %s\n", server));
64 fstrcpy(remote_machine, server);
67 standard_sub_basic(remote_machine);
68 strupper(remote_machine);
70 if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
71 DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
76 if (ismyip(dest_ip)) {
77 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
83 if (!cli_connect(pcli, remote_machine, &dest_ip)) {
84 DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
85 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
90 if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
91 DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
92 session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
96 pcli->protocol = PROTOCOL_NT1;
98 if (!cli_negprot(pcli)) {
99 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
100 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
105 if (pcli->protocol != PROTOCOL_NT1) {
106 DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
113 * Do an anonymous session setup.
116 if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
117 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
118 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
123 if (!(pcli->sec_mode & 1)) {
124 DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
130 if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
131 DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
132 Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
138 * We now have an anonymous connection to IPC$ on the domain password server.
142 * Even if the connect succeeds we need to setup the netlogon
143 * pipe here. We do this as we may just have changed the domain
144 * account password on the PDC and yet we may be talking to
145 * a BDC that doesn't have this replicated yet. In this case
146 * a successful connect to a DC needs to take the netlogon connect
147 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
150 if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
151 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
152 machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
153 cli_nt_session_close(pcli);
159 if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
160 DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
161 %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
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.
184 if (ip_equal(ipzero, *ip))
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 ip_list[i] = ipzero; /* 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 ip_list[i] = ipzero; /* 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)))
262 free((char *)ip_list);
268 /***********************************************************************
269 Do the same as security=server, but using NT Domain calls and a session
270 key from the machine password. If the server parameter is specified
271 use it, otherwise figure out a server from the 'password server' param.
272 ************************************************************************/
274 uint32 domain_client_validate(const auth_usersupplied_info *user_info,
275 auth_serversupplied_info *server_info,
278 unsigned char trust_passwd[16];
279 fstring remote_machine;
282 NET_USER_INFO_3 info3;
283 struct cli_state cli;
285 BOOL connected_ok = False;
286 time_t last_change_time;
290 * Check that the requested domain is not our own machine name.
291 * If it is, we should never check the PDC here, we use our own local
295 if(strequal(user_info->domain.str, global_myname)) {
296 DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
297 return NT_STATUS_LOGON_FAILURE;
301 * Get the machine account password for our primary domain
303 if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
305 DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", lp_workgroup()));
306 return NT_STATUS_LOGON_FAILURE;
309 /* Test if machine password is expired and need to be changed */
310 if (time(NULL) > last_change_time + lp_machine_password_timeout())
312 global_machine_password_needs_changing = True;
316 * At this point, smb_apasswd points to the lanman response to
317 * the challenge in local_challenge, and smb_ntpasswd points to
318 * the NT response to the challenge in local_challenge. Ship
319 * these over the secure channel to a domain controller and
320 * see if they were valid.
326 * Treat each name in the 'password server =' line as a potential
327 * PDC/BDC. Contact each in turn and try and authenticate.
333 pserver = lp_passwordserver();
334 if (! *pserver) pserver = "*";
338 while (!connected_ok &&
339 next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
340 if(strequal(remote_machine, "*")) {
341 connected_ok = find_connect_pdc(&cli, trust_passwd, last_change_time);
343 connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
348 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
350 return NT_STATUS_LOGON_FAILURE;
353 /* We really don't care what LUID we give the user. */
354 generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
358 cli_nt_login_network(&cli, user_info->domain.str, user_info->smb_username.str, smb_uid_low, user_info->chal,
359 user_info->lm_resp.buffer, user_info->lm_resp.len,
360 user_info->nt_resp.buffer, user_info->lm_resp.len,
363 nt_status = cli_nt_error(&cli);
364 if (nt_status != NT_STATUS_NOPROBLEMO) {
365 DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
366 %s to Domain controller %s. Error was %s.\n", user_info->smb_username.str, user_info->domain.str, remote_machine, cli_errstr(&cli)));
370 * Here, if we really want it, we have lots of info about the user in info3.
375 * We don't actually need to do this - plus it fails currently with
376 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
380 if (nt_status == NT_STATUS_NOPROBLMO) {
381 if(cli_nt_logoff(&cli, &ctr) == False) {
382 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
383 %s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
384 nt_status = NT_STATUS_LOGON_FAILURE;
389 /* Note - once the cli stream is shutdown the mem_ctx used
390 to allocate the other_sids and gids structures has been deleted - so
391 these pointers are no longer valid..... */
393 cli_nt_session_close(&cli);
399 /****************************************************************************
400 Check for a valid username and password in security=domain mode.
401 ****************************************************************************/
403 uint32 check_domain_security(const auth_usersupplied_info *user_info,
404 auth_serversupplied_info *server_info)
406 uint32 nt_status = NT_STATUS_LOGON_FAILURE;
408 if(lp_security() != SEC_DOMAIN)
409 return NT_STATUS_LOGON_FAILURE;
411 nt_status = domain_client_validate(user_info, server_info, NULL);