2 Unix SMB/CIFS implementation.
3 Authenticate against a remote domain
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Andrew Bartlett 2001
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define DBGC_CLASS DBGC_AUTH
27 extern BOOL global_machine_password_needs_changing;
30 * Connect to a remote server for (inter)domain security authenticaion.
32 * @param cli the cli to return containing the active connection
33 * @param server either a machine name or text IP address to
35 * @param setup_creds_as domain account to setup credentials as
36 * @param sec_chan a switch value to distinguish between domain
37 * member and interdomain authentication
38 * @param trust_passwd the trust password to establish the
43 static NTSTATUS connect_to_domain_password_server(struct cli_state **cli,
44 const char *dc_name, struct in_addr dc_ip,
45 const char *setup_creds_as,
47 const unsigned char *trust_passwd,
52 /* TODO: Send a SAMLOGON request to determine whether this is a valid
53 logonserver. We can avoid a 30-second timeout if the DC is down
54 if the SAMLOGON request fails as it is only over UDP. */
56 /* we use a mutex to prevent two connections at once - when a
57 Win2k PDC get two connections where one hasn't completed a
58 session setup yet it will send a TCP reset to the first
59 connection (tridge) */
62 * With NT4.x DC's *all* authentication must be serialized to avoid
63 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
66 if (!grab_server_mutex(dc_name))
67 return NT_STATUS_NO_LOGON_SERVERS;
69 /* Attempt connection */
71 result = cli_full_connection(cli, global_myname(), dc_name, &dc_ip, 0,
72 "IPC$", "IPC", "", "", "", 0, Undefined, retry);
74 if (!NT_STATUS_IS_OK(result)) {
75 /* map to something more useful */
76 if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
77 result = NT_STATUS_NO_LOGON_SERVERS;
80 release_server_mutex();
85 * We now have an anonymous connection to IPC$ on the domain password server.
89 * Even if the connect succeeds we need to setup the netlogon
90 * pipe here. We do this as we may just have changed the domain
91 * account password on the PDC and yet we may be talking to
92 * a BDC that doesn't have this replicated yet. In this case
93 * a successful connect to a DC needs to take the netlogon connect
94 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
97 if(cli_nt_session_open(*cli, PI_NETLOGON) == False) {
98 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
99 machine %s. Error was : %s.\n", dc_name, cli_errstr(*cli)));
100 cli_nt_session_close(*cli);
103 release_server_mutex();
104 return NT_STATUS_NO_LOGON_SERVERS;
107 fstr_sprintf((*cli)->mach_acct, "%s$", setup_creds_as);
109 if (!(*cli)->mach_acct) {
110 release_server_mutex();
111 return NT_STATUS_NO_MEMORY;
114 result = cli_nt_establish_netlogon(*cli, sec_chan, trust_passwd);
116 if (!NT_STATUS_IS_OK(result)) {
117 DEBUG(0,("connect_to_domain_password_server: unable to setup the NETLOGON credentials to machine \
118 %s. Error was : %s.\n", dc_name, nt_errstr(result)));
119 cli_nt_session_close(*cli);
122 release_server_mutex();
126 /* We exit here with the mutex *locked*. JRA */
131 /***********************************************************************
132 Do the same as security=server, but using NT Domain calls and a session
133 key from the machine password. If the server parameter is specified
134 use it, otherwise figure out a server from the 'password server' param.
135 ************************************************************************/
137 static NTSTATUS domain_client_validate(TALLOC_CTX *mem_ctx,
138 const auth_usersupplied_info *user_info,
141 auth_serversupplied_info **server_info,
142 const char *dc_name, struct in_addr dc_ip,
143 const char *setup_creds_as,
145 unsigned char trust_passwd[16],
146 time_t last_change_time)
148 NET_USER_INFO_3 info3;
149 struct cli_state *cli = NULL;
150 NTSTATUS nt_status = NT_STATUS_NO_LOGON_SERVERS;
155 * At this point, smb_apasswd points to the lanman response to
156 * the challenge in local_challenge, and smb_ntpasswd points to
157 * the NT response to the challenge in local_challenge. Ship
158 * these over the secure channel to a domain controller and
159 * see if they were valid.
162 /* rety loop for robustness */
164 for (i = 0; !NT_STATUS_IS_OK(nt_status) && retry && (i < 3); i++) {
165 nt_status = connect_to_domain_password_server(&cli, dc_name, dc_ip, setup_creds_as,
166 sec_chan, trust_passwd, &retry);
169 if ( !NT_STATUS_IS_OK(nt_status) ) {
170 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
171 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
172 return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE;
180 * If this call succeeds, we now have lots of info about the user
181 * in the info3 structure.
184 nt_status = cli_netlogon_sam_network_logon(cli, mem_ctx,
185 NULL, user_info->smb_name.str, user_info->domain.str,
186 user_info->wksta_name.str, chal, user_info->lm_resp,
187 user_info->nt_resp, &info3);
189 /* let go as soon as possible so we avoid any potential deadlocks
190 with winbind lookup up users or groups */
192 release_server_mutex();
194 if (!NT_STATUS_IS_OK(nt_status)) {
195 DEBUG(0,("domain_client_validate: unable to validate password "
196 "for user %s in domain %s to Domain controller %s. "
197 "Error was %s.\n", user_info->smb_name.str,
198 user_info->domain.str, cli->srv_name_slash,
199 nt_errstr(nt_status)));
201 /* map to something more useful */
202 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
203 nt_status = NT_STATUS_NO_LOGON_SERVERS;
206 nt_status = make_server_info_info3(mem_ctx, user_info->internal_username.str,
207 user_info->smb_name.str, domain, server_info, &info3);
208 netsamlogon_cache_store( mem_ctx, &info3 );
213 * We don't actually need to do this - plus it fails currently with
214 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
218 if (NT_STATUS_IS_OK(status)) {
219 if(cli_nt_logoff(&cli, &ctr) == False) {
220 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
221 %s to Domain controller %s. Error was %s.\n", user, domain, dc_name, cli_errstr(&cli)));
222 nt_status = NT_STATUS_LOGON_FAILURE;
227 /* Note - once the cli stream is shutdown the mem_ctx used
228 to allocate the other_sids and gids structures has been deleted - so
229 these pointers are no longer valid..... */
231 cli_nt_session_close(cli);
237 /****************************************************************************
238 Check for a valid username and password in security=domain mode.
239 ****************************************************************************/
241 static NTSTATUS check_ntdomain_security(const struct auth_context *auth_context,
242 void *my_private_data,
244 const auth_usersupplied_info *user_info,
245 auth_serversupplied_info **server_info)
247 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
248 unsigned char trust_passwd[16];
249 time_t last_change_time;
250 const char *domain = lp_workgroup();
251 uint32 sec_channel_type = 0;
253 struct in_addr dc_ip;
255 if ( lp_server_role() != ROLE_DOMAIN_MEMBER ) {
256 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
257 "ntdomain auth method when not a member of a domain.\n"));
258 return NT_STATUS_NOT_IMPLEMENTED;
261 if (!user_info || !server_info || !auth_context) {
262 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
263 return NT_STATUS_INVALID_PARAMETER;
267 * Check that the requested domain is not our own machine name.
268 * If it is, we should never check the PDC here, we use our own local
272 if(strequal(get_global_sam_name(), user_info->domain.str)) {
273 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
274 return NT_STATUS_NOT_IMPLEMENTED;
278 * Get the machine account password for our primary domain
279 * No need to become_root() as secrets_init() is done at startup.
282 if (!secrets_fetch_trust_account_password(domain, trust_passwd, &last_change_time, &sec_channel_type))
284 DEBUG(0, ("check_ntdomain_security: could not fetch trust account password for domain '%s'\n", domain));
285 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
288 /* Test if machine password has expired and needs to be changed */
289 if (lp_machine_password_timeout()) {
290 if (last_change_time > 0 &&
291 time(NULL) > (last_change_time +
292 lp_machine_password_timeout())) {
293 global_machine_password_needs_changing = True;
297 /* we need our DC to send the net_sam_logon() request to */
299 if ( !get_dc_name(domain, NULL, dc_name, &dc_ip) ) {
300 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
301 user_info->domain.str));
302 return NT_STATUS_NO_LOGON_SERVERS;
305 nt_status = domain_client_validate(mem_ctx, user_info, domain,
306 (uchar *)auth_context->challenge.data, server_info, dc_name, dc_ip,
307 global_myname(), sec_channel_type,trust_passwd, last_change_time);
312 /* module initialisation */
313 static NTSTATUS auth_init_ntdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
315 if (!make_auth_methods(auth_context, auth_method)) {
316 return NT_STATUS_NO_MEMORY;
319 (*auth_method)->name = "ntdomain";
320 (*auth_method)->auth = check_ntdomain_security;
325 /****************************************************************************
326 Check for a valid username and password in a trusted domain
327 ****************************************************************************/
329 static NTSTATUS check_trustdomain_security(const struct auth_context *auth_context,
330 void *my_private_data,
332 const auth_usersupplied_info *user_info,
333 auth_serversupplied_info **server_info)
335 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
336 unsigned char trust_md4_password[16];
337 char *trust_password;
338 time_t last_change_time;
341 struct in_addr dc_ip;
343 if (!user_info || !server_info || !auth_context) {
344 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
345 return NT_STATUS_INVALID_PARAMETER;
349 * Check that the requested domain is not our own machine name or domain name.
352 if( strequal(get_global_sam_name(), user_info->domain.str)) {
353 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
354 user_info->domain.str));
355 return NT_STATUS_NOT_IMPLEMENTED;
358 /* No point is bothering if this is not a trusted domain.
359 This return makes "map to guest = bad user" work again.
360 The logic is that if we know nothing about the domain, that
361 user is known to us and does not exist */
363 if ( !is_trusted_domain( user_info->domain.str ) )
364 return NT_STATUS_NOT_IMPLEMENTED;
367 * Get the trusted account password for the trusted domain
368 * No need to become_root() as secrets_init() is done at startup.
371 if (!secrets_fetch_trusted_domain_password(user_info->domain.str, &trust_password, &sid, &last_change_time))
373 DEBUG(0, ("check_trustdomain_security: could not fetch trust account password for domain %s\n", user_info->domain.str));
374 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
377 #ifdef DEBUG_PASSWORD
378 DEBUG(100, ("Trust password for domain %s is %s\n", user_info->domain.str, trust_password));
380 E_md4hash(trust_password, trust_md4_password);
381 SAFE_FREE(trust_password);
384 /* Test if machine password is expired and need to be changed */
385 if (time(NULL) > last_change_time + lp_machine_password_timeout())
387 global_machine_password_needs_changing = True;
391 /* use get_dc_name() for consistency even through we know that it will be
394 if ( !get_dc_name(user_info->domain.str, NULL, dc_name, &dc_ip) ) {
395 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
396 user_info->domain.str));
397 return NT_STATUS_NO_LOGON_SERVERS;
400 nt_status = domain_client_validate(mem_ctx, user_info, user_info->domain.str,
401 (uchar *)auth_context->challenge.data, server_info, dc_name, dc_ip,
402 lp_workgroup(), SEC_CHAN_DOMAIN, trust_md4_password, last_change_time);
407 /* module initialisation */
408 static NTSTATUS auth_init_trustdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
410 if (!make_auth_methods(auth_context, auth_method)) {
411 return NT_STATUS_NO_MEMORY;
414 (*auth_method)->name = "trustdomain";
415 (*auth_method)->auth = check_trustdomain_security;
419 NTSTATUS auth_domain_init(void)
421 smb_register_auth(AUTH_INTERFACE_VERSION, "trustdomain", auth_init_trustdomain);
422 smb_register_auth(AUTH_INTERFACE_VERSION, "ntdomain", auth_init_ntdomain);