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 3 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, see <http://www.gnu.org/licenses/>.
24 #define DBGC_CLASS DBGC_AUTH
26 extern bool global_machine_password_needs_changing;
29 * Connect to a remote server for (inter)domain security authenticaion.
31 * @param cli the cli to return containing the active connection
32 * @param server either a machine name or text IP address to
34 * @param setup_creds_as domain account to setup credentials as
35 * @param sec_chan a switch value to distinguish between domain
36 * member and interdomain authentication
37 * @param trust_passwd the trust password to establish the
42 static NTSTATUS connect_to_domain_password_server(struct cli_state **cli,
45 struct sockaddr_storage *dc_ss,
46 struct rpc_pipe_client **pipe_ret,
50 struct rpc_pipe_client *netlogon_pipe = NULL;
56 /* TODO: Send a SAMLOGON request to determine whether this is a valid
57 logonserver. We can avoid a 30-second timeout if the DC is down
58 if the SAMLOGON request fails as it is only over UDP. */
60 /* we use a mutex to prevent two connections at once - when a
61 Win2k PDC get two connections where one hasn't completed a
62 session setup yet it will send a TCP reset to the first
63 connection (tridge) */
66 * With NT4.x DC's *all* authentication must be serialized to avoid
67 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
70 if (!grab_server_mutex(dc_name)) {
71 return NT_STATUS_NO_LOGON_SERVERS;
74 /* Attempt connection */
76 result = cli_full_connection(cli, global_myname(), dc_name, dc_ss, 0,
77 "IPC$", "IPC", "", "", "", 0, Undefined, retry);
79 if (!NT_STATUS_IS_OK(result)) {
80 /* map to something more useful */
81 if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
82 result = NT_STATUS_NO_LOGON_SERVERS;
90 release_server_mutex();
95 * We now have an anonymous connection to IPC$ on the domain password server.
99 * Even if the connect succeeds we need to setup the netlogon
100 * pipe here. We do this as we may just have changed the domain
101 * account password on the PDC and yet we may be talking to
102 * a BDC that doesn't have this replicated yet. In this case
103 * a successful connect to a DC needs to take the netlogon connect
104 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
107 /* open the netlogon pipe. */
108 if (lp_client_schannel()) {
109 /* We also setup the creds chain in the open_schannel call. */
110 netlogon_pipe = cli_rpc_pipe_open_schannel(*cli, PI_NETLOGON,
111 PIPE_AUTH_LEVEL_PRIVACY, domain, &result);
113 netlogon_pipe = cli_rpc_pipe_open_noauth(*cli, PI_NETLOGON, &result);
117 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
118 machine %s. Error was : %s.\n", dc_name, nt_errstr(result)));
121 release_server_mutex();
125 if (!lp_client_schannel()) {
126 /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
127 uint32 neg_flags = NETLOGON_NEG_SELECT_AUTH2_FLAGS;
128 uint32 sec_chan_type = 0;
129 unsigned char machine_pwd[16];
130 const char *account_name;
132 if (!get_trust_pw_hash(domain, machine_pwd, &account_name,
135 DEBUG(0, ("connect_to_domain_password_server: could not fetch "
136 "trust account password for domain '%s'\n",
140 release_server_mutex();
141 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
144 result = rpccli_netlogon_setup_creds(netlogon_pipe,
145 dc_name, /* server name */
147 global_myname(), /* client name */
148 account_name, /* machine account name */
153 if (!NT_STATUS_IS_OK(result)) {
156 release_server_mutex();
162 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
163 machine %s. Error was : %s.\n", dc_name, cli_errstr(*cli)));
166 release_server_mutex();
167 return NT_STATUS_NO_LOGON_SERVERS;
170 /* We exit here with the mutex *locked*. JRA */
172 *pipe_ret = netlogon_pipe;
177 /***********************************************************************
178 Do the same as security=server, but using NT Domain calls and a session
179 key from the machine password. If the server parameter is specified
180 use it, otherwise figure out a server from the 'password server' param.
181 ************************************************************************/
183 static NTSTATUS domain_client_validate(TALLOC_CTX *mem_ctx,
184 const auth_usersupplied_info *user_info,
187 auth_serversupplied_info **server_info,
189 struct sockaddr_storage *dc_ss)
192 struct netr_SamInfo3 *info3 = NULL;
193 struct cli_state *cli = NULL;
194 struct rpc_pipe_client *netlogon_pipe = NULL;
195 NTSTATUS nt_status = NT_STATUS_NO_LOGON_SERVERS;
200 * At this point, smb_apasswd points to the lanman response to
201 * the challenge in local_challenge, and smb_ntpasswd points to
202 * the NT response to the challenge in local_challenge. Ship
203 * these over the secure channel to a domain controller and
204 * see if they were valid.
207 /* rety loop for robustness */
209 for (i = 0; !NT_STATUS_IS_OK(nt_status) && retry && (i < 3); i++) {
210 nt_status = connect_to_domain_password_server(&cli,
218 if ( !NT_STATUS_IS_OK(nt_status) ) {
219 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
220 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
221 return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE;
226 /* store a successful connection */
228 saf_store( domain, cli->desthost );
231 * If this call succeeds, we now have lots of info about the user
232 * in the info3 structure.
235 nt_status = rpccli_netlogon_sam_network_logon(netlogon_pipe,
237 user_info->logon_parameters,/* flags such as 'allow workstation logon' */
238 dc_name, /* server name */
239 user_info->smb_name, /* user name logging on. */
240 user_info->client_domain, /* domain name */
241 user_info->wksta_name, /* workstation name */
242 chal, /* 8 byte challenge. */
243 user_info->lm_resp, /* lanman 24 byte response */
244 user_info->nt_resp, /* nt 24 byte response */
245 &info3); /* info3 out */
247 /* Let go as soon as possible so we avoid any potential deadlocks
248 with winbind lookup up users or groups. */
250 release_server_mutex();
252 if (!NT_STATUS_IS_OK(nt_status)) {
253 DEBUG(0,("domain_client_validate: unable to validate password "
254 "for user %s in domain %s to Domain controller %s. "
255 "Error was %s.\n", user_info->smb_name,
256 user_info->domain, dc_name,
257 nt_errstr(nt_status)));
259 /* map to something more useful */
260 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
261 nt_status = NT_STATUS_NO_LOGON_SERVERS;
264 nt_status = make_server_info_info3(mem_ctx,
270 if (NT_STATUS_IS_OK(nt_status)) {
271 if (user_info->was_mapped) {
272 (*server_info)->was_mapped = user_info->was_mapped;
275 if ( ! (*server_info)->guest) {
276 /* if a real user check pam account restrictions */
277 /* only really perfomed if "obey pam restriction" is true */
278 nt_status = smb_pam_accountcheck((*server_info)->unix_name);
279 if ( !NT_STATUS_IS_OK(nt_status)) {
280 DEBUG(1, ("PAM account restriction prevents user login\n"));
288 netsamlogon_cache_store(user_info->smb_name, info3);
292 /* Note - once the cli stream is shutdown the mem_ctx used
293 to allocate the other_sids and gids structures has been deleted - so
294 these pointers are no longer valid..... */
300 /****************************************************************************
301 Check for a valid username and password in security=domain mode.
302 ****************************************************************************/
304 static NTSTATUS check_ntdomain_security(const struct auth_context *auth_context,
305 void *my_private_data,
307 const auth_usersupplied_info *user_info,
308 auth_serversupplied_info **server_info)
310 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
311 const char *domain = lp_workgroup();
313 struct sockaddr_storage dc_ss;
315 if ( lp_server_role() != ROLE_DOMAIN_MEMBER ) {
316 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
317 "ntdomain auth method when not a member of a domain.\n"));
318 return NT_STATUS_NOT_IMPLEMENTED;
321 if (!user_info || !server_info || !auth_context) {
322 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
323 return NT_STATUS_INVALID_PARAMETER;
327 * Check that the requested domain is not our own machine name.
328 * If it is, we should never check the PDC here, we use our own local
332 if(strequal(get_global_sam_name(), user_info->domain)) {
333 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
334 return NT_STATUS_NOT_IMPLEMENTED;
337 /* we need our DC to send the net_sam_logon() request to */
339 if ( !get_dc_name(domain, NULL, dc_name, &dc_ss) ) {
340 DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
342 return NT_STATUS_NO_LOGON_SERVERS;
345 nt_status = domain_client_validate(mem_ctx,
348 (uchar *)auth_context->challenge.data,
356 /* module initialisation */
357 static NTSTATUS auth_init_ntdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
359 if (!make_auth_methods(auth_context, auth_method)) {
360 return NT_STATUS_NO_MEMORY;
363 (*auth_method)->name = "ntdomain";
364 (*auth_method)->auth = check_ntdomain_security;
369 /****************************************************************************
370 Check for a valid username and password in a trusted domain
371 ****************************************************************************/
373 static NTSTATUS check_trustdomain_security(const struct auth_context *auth_context,
374 void *my_private_data,
376 const auth_usersupplied_info *user_info,
377 auth_serversupplied_info **server_info)
379 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
380 unsigned char trust_md4_password[16];
381 char *trust_password;
382 time_t last_change_time;
385 struct sockaddr_storage dc_ss;
387 if (!user_info || !server_info || !auth_context) {
388 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
389 return NT_STATUS_INVALID_PARAMETER;
393 * Check that the requested domain is not our own machine name or domain name.
396 if( strequal(get_global_sam_name(), user_info->domain)) {
397 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
399 return NT_STATUS_NOT_IMPLEMENTED;
402 /* No point is bothering if this is not a trusted domain.
403 This return makes "map to guest = bad user" work again.
404 The logic is that if we know nothing about the domain, that
405 user is not known to us and does not exist */
407 if ( !is_trusted_domain( user_info->domain ) )
408 return NT_STATUS_NOT_IMPLEMENTED;
411 * Get the trusted account password for the trusted domain
412 * No need to become_root() as secrets_init() is done at startup.
415 if (!pdb_get_trusteddom_pw(user_info->domain, &trust_password,
416 &sid, &last_change_time)) {
417 DEBUG(0, ("check_trustdomain_security: could not fetch trust "
418 "account password for domain %s\n",
420 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
423 #ifdef DEBUG_PASSWORD
424 DEBUG(100, ("Trust password for domain %s is %s\n", user_info->domain,
427 E_md4hash(trust_password, trust_md4_password);
428 SAFE_FREE(trust_password);
431 /* Test if machine password is expired and need to be changed */
432 if (time(NULL) > last_change_time + (time_t)lp_machine_password_timeout())
434 global_machine_password_needs_changing = True;
438 /* use get_dc_name() for consistency even through we know that it will be
441 if ( !get_dc_name(user_info->domain, NULL, dc_name, &dc_ss) ) {
442 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
444 return NT_STATUS_NO_LOGON_SERVERS;
447 nt_status = domain_client_validate(mem_ctx,
450 (uchar *)auth_context->challenge.data,
458 /* module initialisation */
459 static NTSTATUS auth_init_trustdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
461 if (!make_auth_methods(auth_context, auth_method)) {
462 return NT_STATUS_NO_MEMORY;
465 (*auth_method)->name = "trustdomain";
466 (*auth_method)->auth = check_trustdomain_security;
470 NTSTATUS auth_domain_init(void)
472 smb_register_auth(AUTH_INTERFACE_VERSION, "trustdomain", auth_init_trustdomain);
473 smb_register_auth(AUTH_INTERFACE_VERSION, "ntdomain", auth_init_ntdomain);