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
;
27 static struct named_mutex
*mutex
;
30 * Change machine password (called from main loop
31 * idle timeout. Must be done as root.
34 void attempt_machine_password_change(void)
36 unsigned char trust_passwd_hash
[16];
40 if (!global_machine_password_needs_changing
) {
44 if (lp_security() != SEC_DOMAIN
) {
49 * We're in domain level security, and the code that
50 * read the machine password flagged that the machine
51 * password needs changing.
55 * First, open the machine password file with an exclusive lock.
58 lock
= secrets_get_trust_account_lock(NULL
, lp_workgroup());
61 DEBUG(0,("attempt_machine_password_change: unable to lock "
62 "the machine account password for machine %s in "
64 global_myname(), lp_workgroup() ));
68 if(!secrets_fetch_trust_account_password(lp_workgroup(),
69 trust_passwd_hash
, &lct
, NULL
)) {
70 DEBUG(0,("attempt_machine_password_change: unable to read the "
71 "machine account password for %s in domain %s.\n",
72 global_myname(), lp_workgroup()));
78 * Make sure someone else hasn't already done this.
81 if(time(NULL
) < lct
+ lp_machine_password_timeout()) {
82 global_machine_password_needs_changing
= false;
87 /* always just contact the PDC here */
89 change_trust_account_password( lp_workgroup(), NULL
);
90 global_machine_password_needs_changing
= false;
95 * Connect to a remote server for (inter)domain security authenticaion.
97 * @param cli the cli to return containing the active connection
98 * @param server either a machine name or text IP address to
100 * @param setup_creds_as domain account to setup credentials as
101 * @param sec_chan a switch value to distinguish between domain
102 * member and interdomain authentication
103 * @param trust_passwd the trust password to establish the
108 static NTSTATUS
connect_to_domain_password_server(struct cli_state
**cli
,
111 struct sockaddr_storage
*dc_ss
,
112 struct rpc_pipe_client
**pipe_ret
,
116 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
122 /* TODO: Send a SAMLOGON request to determine whether this is a valid
123 logonserver. We can avoid a 30-second timeout if the DC is down
124 if the SAMLOGON request fails as it is only over UDP. */
126 /* we use a mutex to prevent two connections at once - when a
127 Win2k PDC get two connections where one hasn't completed a
128 session setup yet it will send a TCP reset to the first
129 connection (tridge) */
132 * With NT4.x DC's *all* authentication must be serialized to avoid
133 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
136 mutex
= grab_named_mutex(NULL
, dc_name
, 10);
138 return NT_STATUS_NO_LOGON_SERVERS
;
141 /* Attempt connection */
143 result
= cli_full_connection(cli
, global_myname(), dc_name
, dc_ss
, 0,
144 "IPC$", "IPC", "", "", "", 0, Undefined
, retry
);
146 if (!NT_STATUS_IS_OK(result
)) {
147 /* map to something more useful */
148 if (NT_STATUS_EQUAL(result
, NT_STATUS_UNSUCCESSFUL
)) {
149 result
= NT_STATUS_NO_LOGON_SERVERS
;
162 * We now have an anonymous connection to IPC$ on the domain password server.
166 * Even if the connect succeeds we need to setup the netlogon
167 * pipe here. We do this as we may just have changed the domain
168 * account password on the PDC and yet we may be talking to
169 * a BDC that doesn't have this replicated yet. In this case
170 * a successful connect to a DC needs to take the netlogon connect
171 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
174 /* open the netlogon pipe. */
175 if (lp_client_schannel()) {
176 /* We also setup the creds chain in the open_schannel call. */
177 result
= cli_rpc_pipe_open_schannel(
178 *cli
, &ndr_table_netlogon
.syntax_id
,
179 PIPE_AUTH_LEVEL_PRIVACY
, domain
, &netlogon_pipe
);
181 result
= cli_rpc_pipe_open_noauth(
182 *cli
, &ndr_table_netlogon
.syntax_id
, &netlogon_pipe
);
185 if (!NT_STATUS_IS_OK(result
)) {
186 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
187 machine %s. Error was : %s.\n", dc_name
, nt_errstr(result
)));
194 if (!lp_client_schannel()) {
195 /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
196 uint32_t neg_flags
= NETLOGON_NEG_AUTH2_ADS_FLAGS
;
197 uint32 sec_chan_type
= 0;
198 unsigned char machine_pwd
[16];
199 const char *account_name
;
201 if (!get_trust_pw_hash(domain
, machine_pwd
, &account_name
,
204 DEBUG(0, ("connect_to_domain_password_server: could not fetch "
205 "trust account password for domain '%s'\n",
210 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
213 result
= rpccli_netlogon_setup_creds(netlogon_pipe
,
214 dc_name
, /* server name */
216 global_myname(), /* client name */
217 account_name
, /* machine account name */
222 if (!NT_STATUS_IS_OK(result
)) {
231 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
232 machine %s. Error was : %s.\n", dc_name
, cli_errstr(*cli
)));
236 return NT_STATUS_NO_LOGON_SERVERS
;
239 /* We exit here with the mutex *locked*. JRA */
241 *pipe_ret
= netlogon_pipe
;
246 /***********************************************************************
247 Do the same as security=server, but using NT Domain calls and a session
248 key from the machine password. If the server parameter is specified
249 use it, otherwise figure out a server from the 'password server' param.
250 ************************************************************************/
252 static NTSTATUS
domain_client_validate(TALLOC_CTX
*mem_ctx
,
253 const auth_usersupplied_info
*user_info
,
256 auth_serversupplied_info
**server_info
,
258 struct sockaddr_storage
*dc_ss
)
261 struct netr_SamInfo3
*info3
= NULL
;
262 struct cli_state
*cli
= NULL
;
263 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
264 NTSTATUS nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
269 * At this point, smb_apasswd points to the lanman response to
270 * the challenge in local_challenge, and smb_ntpasswd points to
271 * the NT response to the challenge in local_challenge. Ship
272 * these over the secure channel to a domain controller and
273 * see if they were valid.
276 /* rety loop for robustness */
278 for (i
= 0; !NT_STATUS_IS_OK(nt_status
) && retry
&& (i
< 3); i
++) {
279 nt_status
= connect_to_domain_password_server(&cli
,
287 if ( !NT_STATUS_IS_OK(nt_status
) ) {
288 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
289 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_ACCESS_DENIED
)) {
290 return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE
;
295 /* store a successful connection */
297 saf_store( domain
, cli
->desthost
);
300 * If this call succeeds, we now have lots of info about the user
301 * in the info3 structure.
304 nt_status
= rpccli_netlogon_sam_network_logon(netlogon_pipe
,
306 user_info
->logon_parameters
,/* flags such as 'allow workstation logon' */
307 dc_name
, /* server name */
308 user_info
->smb_name
, /* user name logging on. */
309 user_info
->client_domain
, /* domain name */
310 user_info
->wksta_name
, /* workstation name */
311 chal
, /* 8 byte challenge. */
312 user_info
->lm_resp
, /* lanman 24 byte response */
313 user_info
->nt_resp
, /* nt 24 byte response */
314 &info3
); /* info3 out */
316 /* Let go as soon as possible so we avoid any potential deadlocks
317 with winbind lookup up users or groups. */
321 if (!NT_STATUS_IS_OK(nt_status
)) {
322 DEBUG(0,("domain_client_validate: unable to validate password "
323 "for user %s in domain %s to Domain controller %s. "
324 "Error was %s.\n", user_info
->smb_name
,
325 user_info
->client_domain
, dc_name
,
326 nt_errstr(nt_status
)));
328 /* map to something more useful */
329 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_UNSUCCESSFUL
)) {
330 nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
333 nt_status
= make_server_info_info3(mem_ctx
,
339 if (NT_STATUS_IS_OK(nt_status
)) {
340 (*server_info
)->nss_token
|= user_info
->was_mapped
;
342 if ( ! (*server_info
)->guest
) {
343 /* if a real user check pam account restrictions */
344 /* only really perfomed if "obey pam restriction" is true */
345 nt_status
= smb_pam_accountcheck((*server_info
)->unix_name
);
346 if ( !NT_STATUS_IS_OK(nt_status
)) {
347 DEBUG(1, ("PAM account restriction prevents user login\n"));
355 netsamlogon_cache_store(user_info
->smb_name
, info3
);
359 /* Note - once the cli stream is shutdown the mem_ctx used
360 to allocate the other_sids and gids structures has been deleted - so
361 these pointers are no longer valid..... */
367 /****************************************************************************
368 Check for a valid username and password in security=domain mode.
369 ****************************************************************************/
371 static NTSTATUS
check_ntdomain_security(const struct auth_context
*auth_context
,
372 void *my_private_data
,
374 const auth_usersupplied_info
*user_info
,
375 auth_serversupplied_info
**server_info
)
377 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
378 const char *domain
= lp_workgroup();
380 struct sockaddr_storage dc_ss
;
382 if ( lp_server_role() != ROLE_DOMAIN_MEMBER
) {
383 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
384 "ntdomain auth method when not a member of a domain.\n"));
385 return NT_STATUS_NOT_IMPLEMENTED
;
388 if (!user_info
|| !server_info
|| !auth_context
) {
389 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
390 return NT_STATUS_INVALID_PARAMETER
;
394 * Check that the requested domain is not our own machine name.
395 * If it is, we should never check the PDC here, we use our own local
399 if(strequal(get_global_sam_name(), user_info
->domain
)) {
400 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
401 return NT_STATUS_NOT_IMPLEMENTED
;
404 /* we need our DC to send the net_sam_logon() request to */
406 if ( !get_dc_name(domain
, NULL
, dc_name
, &dc_ss
) ) {
407 DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
409 return NT_STATUS_NO_LOGON_SERVERS
;
412 nt_status
= domain_client_validate(mem_ctx
,
415 (uchar
*)auth_context
->challenge
.data
,
423 /* module initialisation */
424 static NTSTATUS
auth_init_ntdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
426 if (!make_auth_methods(auth_context
, auth_method
)) {
427 return NT_STATUS_NO_MEMORY
;
430 (*auth_method
)->name
= "ntdomain";
431 (*auth_method
)->auth
= check_ntdomain_security
;
436 /****************************************************************************
437 Check for a valid username and password in a trusted domain
438 ****************************************************************************/
440 static NTSTATUS
check_trustdomain_security(const struct auth_context
*auth_context
,
441 void *my_private_data
,
443 const auth_usersupplied_info
*user_info
,
444 auth_serversupplied_info
**server_info
)
446 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
447 unsigned char trust_md4_password
[16];
448 char *trust_password
;
449 time_t last_change_time
;
452 struct sockaddr_storage dc_ss
;
454 if (!user_info
|| !server_info
|| !auth_context
) {
455 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
456 return NT_STATUS_INVALID_PARAMETER
;
460 * Check that the requested domain is not our own machine name or domain name.
463 if( strequal(get_global_sam_name(), user_info
->domain
)) {
464 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
466 return NT_STATUS_NOT_IMPLEMENTED
;
469 /* No point is bothering if this is not a trusted domain.
470 This return makes "map to guest = bad user" work again.
471 The logic is that if we know nothing about the domain, that
472 user is not known to us and does not exist */
474 if ( !is_trusted_domain( user_info
->domain
) )
475 return NT_STATUS_NOT_IMPLEMENTED
;
478 * Get the trusted account password for the trusted domain
479 * No need to become_root() as secrets_init() is done at startup.
482 if (!pdb_get_trusteddom_pw(user_info
->domain
, &trust_password
,
483 &sid
, &last_change_time
)) {
484 DEBUG(0, ("check_trustdomain_security: could not fetch trust "
485 "account password for domain %s\n",
487 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
490 #ifdef DEBUG_PASSWORD
491 DEBUG(100, ("Trust password for domain %s is %s\n", user_info
->domain
,
494 E_md4hash(trust_password
, trust_md4_password
);
495 SAFE_FREE(trust_password
);
498 /* Test if machine password is expired and need to be changed */
499 if (time(NULL
) > last_change_time
+ (time_t)lp_machine_password_timeout())
501 global_machine_password_needs_changing
= True
;
505 /* use get_dc_name() for consistency even through we know that it will be
508 if ( !get_dc_name(user_info
->domain
, NULL
, dc_name
, &dc_ss
) ) {
509 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
511 return NT_STATUS_NO_LOGON_SERVERS
;
514 nt_status
= domain_client_validate(mem_ctx
,
517 (uchar
*)auth_context
->challenge
.data
,
525 /* module initialisation */
526 static NTSTATUS
auth_init_trustdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
528 if (!make_auth_methods(auth_context
, auth_method
)) {
529 return NT_STATUS_NO_MEMORY
;
532 (*auth_method
)->name
= "trustdomain";
533 (*auth_method
)->auth
= check_trustdomain_security
;
537 NTSTATUS
auth_domain_init(void)
539 smb_register_auth(AUTH_INTERFACE_VERSION
, "trustdomain", auth_init_trustdomain
);
540 smb_register_auth(AUTH_INTERFACE_VERSION
, "ntdomain", auth_init_ntdomain
);