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/>.
22 #include "../libcli/auth/libcli_auth.h"
23 #include "../librpc/gen_ndr/ndr_netlogon.h"
24 #include "rpc_client/cli_netlogon.h"
28 #define DBGC_CLASS DBGC_AUTH
30 extern bool global_machine_password_needs_changing
;
31 static struct named_mutex
*mutex
;
34 * Change machine password (called from main loop
35 * idle timeout. Must be done as root.
38 void attempt_machine_password_change(void)
40 unsigned char trust_passwd_hash
[16];
44 if (!global_machine_password_needs_changing
) {
48 if (lp_security() != SEC_DOMAIN
) {
53 * We're in domain level security, and the code that
54 * read the machine password flagged that the machine
55 * password needs changing.
59 * First, open the machine password file with an exclusive lock.
62 lock
= secrets_get_trust_account_lock(NULL
, lp_workgroup());
65 DEBUG(0,("attempt_machine_password_change: unable to lock "
66 "the machine account password for machine %s in "
68 global_myname(), lp_workgroup() ));
72 if(!secrets_fetch_trust_account_password(lp_workgroup(),
73 trust_passwd_hash
, &lct
, NULL
)) {
74 DEBUG(0,("attempt_machine_password_change: unable to read the "
75 "machine account password for %s in domain %s.\n",
76 global_myname(), lp_workgroup()));
82 * Make sure someone else hasn't already done this.
85 if(time(NULL
) < lct
+ lp_machine_password_timeout()) {
86 global_machine_password_needs_changing
= false;
91 /* always just contact the PDC here */
93 change_trust_account_password( lp_workgroup(), NULL
);
94 global_machine_password_needs_changing
= false;
99 * Connect to a remote server for (inter)domain security authenticaion.
101 * @param cli the cli to return containing the active connection
102 * @param server either a machine name or text IP address to
104 * @param setup_creds_as domain account to setup credentials as
105 * @param sec_chan a switch value to distinguish between domain
106 * member and interdomain authentication
107 * @param trust_passwd the trust password to establish the
112 static NTSTATUS
connect_to_domain_password_server(struct cli_state
**cli
,
115 struct sockaddr_storage
*dc_ss
,
116 struct rpc_pipe_client
**pipe_ret
)
119 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
125 /* TODO: Send a SAMLOGON request to determine whether this is a valid
126 logonserver. We can avoid a 30-second timeout if the DC is down
127 if the SAMLOGON request fails as it is only over UDP. */
129 /* we use a mutex to prevent two connections at once - when a
130 Win2k PDC get two connections where one hasn't completed a
131 session setup yet it will send a TCP reset to the first
132 connection (tridge) */
135 * With NT4.x DC's *all* authentication must be serialized to avoid
136 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
139 mutex
= grab_named_mutex(NULL
, dc_name
, 10);
141 return NT_STATUS_NO_LOGON_SERVERS
;
144 /* Attempt connection */
145 result
= cli_full_connection(cli
, global_myname(), dc_name
, dc_ss
, 0,
146 "IPC$", "IPC", "", "", "", 0, Undefined
);
148 if (!NT_STATUS_IS_OK(result
)) {
149 /* map to something more useful */
150 if (NT_STATUS_EQUAL(result
, NT_STATUS_UNSUCCESSFUL
)) {
151 result
= NT_STATUS_NO_LOGON_SERVERS
;
164 * We now have an anonymous connection to IPC$ on the domain password server.
168 * Even if the connect succeeds we need to setup the netlogon
169 * pipe here. We do this as we may just have changed the domain
170 * account password on the PDC and yet we may be talking to
171 * a BDC that doesn't have this replicated yet. In this case
172 * a successful connect to a DC needs to take the netlogon connect
173 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
176 /* open the netlogon pipe. */
177 if (lp_client_schannel()) {
178 /* We also setup the creds chain in the open_schannel call. */
179 result
= cli_rpc_pipe_open_schannel(
180 *cli
, &ndr_table_netlogon
.syntax_id
, NCACN_NP
,
181 DCERPC_AUTH_LEVEL_PRIVACY
, domain
, &netlogon_pipe
);
183 result
= cli_rpc_pipe_open_noauth(
184 *cli
, &ndr_table_netlogon
.syntax_id
, &netlogon_pipe
);
187 if (!NT_STATUS_IS_OK(result
)) {
188 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
189 machine %s. Error was : %s.\n", dc_name
, nt_errstr(result
)));
196 if (!lp_client_schannel()) {
197 /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
198 uint32_t neg_flags
= NETLOGON_NEG_AUTH2_ADS_FLAGS
;
199 enum netr_SchannelType sec_chan_type
= 0;
200 unsigned char machine_pwd
[16];
201 const char *account_name
;
203 if (!get_trust_pw_hash(domain
, machine_pwd
, &account_name
,
206 DEBUG(0, ("connect_to_domain_password_server: could not fetch "
207 "trust account password for domain '%s'\n",
212 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
215 result
= rpccli_netlogon_setup_creds(netlogon_pipe
,
216 dc_name
, /* server name */
218 global_myname(), /* client name */
219 account_name
, /* machine account name */
224 if (!NT_STATUS_IS_OK(result
)) {
233 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
234 machine %s. Error was : %s.\n", dc_name
, cli_errstr(*cli
)));
238 return NT_STATUS_NO_LOGON_SERVERS
;
241 /* We exit here with the mutex *locked*. JRA */
243 *pipe_ret
= netlogon_pipe
;
248 /***********************************************************************
249 Do the same as security=server, but using NT Domain calls and a session
250 key from the machine password. If the server parameter is specified
251 use it, otherwise figure out a server from the 'password server' param.
252 ************************************************************************/
254 static NTSTATUS
domain_client_validate(TALLOC_CTX
*mem_ctx
,
255 const struct auth_usersupplied_info
*user_info
,
258 struct auth_serversupplied_info
**server_info
,
260 struct sockaddr_storage
*dc_ss
)
263 struct netr_SamInfo3
*info3
= NULL
;
264 struct cli_state
*cli
= NULL
;
265 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
266 NTSTATUS nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
270 * At this point, smb_apasswd points to the lanman response to
271 * the challenge in local_challenge, and smb_ntpasswd points to
272 * the NT response to the challenge in local_challenge. Ship
273 * these over the secure channel to a domain controller and
274 * see if they were valid.
277 /* rety loop for robustness */
279 for (i
= 0; !NT_STATUS_IS_OK(nt_status
) && (i
< 3); i
++) {
280 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
->client
.account_name
, /* user name logging on. */
309 user_info
->client
.domain_name
, /* domain name */
310 user_info
->workstation_name
, /* workstation name */
311 chal
, /* 8 byte challenge. */
312 3, /* validation level */
313 user_info
->password
.response
.lanman
, /* lanman 24 byte response */
314 user_info
->password
.response
.nt
, /* nt 24 byte response */
315 &info3
); /* info3 out */
317 /* Let go as soon as possible so we avoid any potential deadlocks
318 with winbind lookup up users or groups. */
322 if (!NT_STATUS_IS_OK(nt_status
)) {
323 DEBUG(0,("domain_client_validate: unable to validate password "
324 "for user %s in domain %s to Domain controller %s. "
325 "Error was %s.\n", user_info
->client
.account_name
,
326 user_info
->client
.domain_name
, dc_name
,
327 nt_errstr(nt_status
)));
329 /* map to something more useful */
330 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_UNSUCCESSFUL
)) {
331 nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
334 nt_status
= make_server_info_info3(mem_ctx
,
335 user_info
->client
.account_name
,
340 if (NT_STATUS_IS_OK(nt_status
)) {
341 (*server_info
)->nss_token
|= user_info
->was_mapped
;
342 netsamlogon_cache_store(user_info
->client
.account_name
, info3
);
347 /* Note - once the cli stream is shutdown the mem_ctx used
348 to allocate the other_sids and gids structures has been deleted - so
349 these pointers are no longer valid..... */
355 /****************************************************************************
356 Check for a valid username and password in security=domain mode.
357 ****************************************************************************/
359 static NTSTATUS
check_ntdomain_security(const struct auth_context
*auth_context
,
360 void *my_private_data
,
362 const struct auth_usersupplied_info
*user_info
,
363 struct auth_serversupplied_info
**server_info
)
365 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
366 const char *domain
= lp_workgroup();
368 struct sockaddr_storage dc_ss
;
370 if ( lp_server_role() != ROLE_DOMAIN_MEMBER
) {
371 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
372 "ntdomain auth method when not a member of a domain.\n"));
373 return NT_STATUS_NOT_IMPLEMENTED
;
376 if (!user_info
|| !server_info
|| !auth_context
) {
377 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
378 return NT_STATUS_INVALID_PARAMETER
;
381 DEBUG(10, ("Check auth for: [%s]\n", user_info
->mapped
.account_name
));
384 * Check that the requested domain is not our own machine name.
385 * If it is, we should never check the PDC here, we use our own local
389 if(strequal(get_global_sam_name(), user_info
->mapped
.domain_name
)) {
390 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
391 return NT_STATUS_NOT_IMPLEMENTED
;
394 /* we need our DC to send the net_sam_logon() request to */
396 if ( !get_dc_name(domain
, NULL
, dc_name
, &dc_ss
) ) {
397 DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
398 user_info
->mapped
.domain_name
));
399 return NT_STATUS_NO_LOGON_SERVERS
;
402 nt_status
= domain_client_validate(mem_ctx
,
405 (uchar
*)auth_context
->challenge
.data
,
413 /* module initialisation */
414 static NTSTATUS
auth_init_ntdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
416 struct auth_methods
*result
;
418 result
= TALLOC_ZERO_P(auth_context
, struct auth_methods
);
419 if (result
== NULL
) {
420 return NT_STATUS_NO_MEMORY
;
422 result
->name
= "ntdomain";
423 result
->auth
= check_ntdomain_security
;
425 *auth_method
= result
;
430 /****************************************************************************
431 Check for a valid username and password in a trusted domain
432 ****************************************************************************/
434 static NTSTATUS
check_trustdomain_security(const struct auth_context
*auth_context
,
435 void *my_private_data
,
437 const struct auth_usersupplied_info
*user_info
,
438 struct auth_serversupplied_info
**server_info
)
440 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
441 unsigned char trust_md4_password
[16];
442 char *trust_password
;
444 struct sockaddr_storage dc_ss
;
446 if (!user_info
|| !server_info
|| !auth_context
) {
447 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
448 return NT_STATUS_INVALID_PARAMETER
;
451 DEBUG(10, ("Check auth for: [%s]\n", user_info
->mapped
.account_name
));
454 * Check that the requested domain is not our own machine name or domain name.
457 if( strequal(get_global_sam_name(), user_info
->mapped
.domain_name
)) {
458 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
459 user_info
->mapped
.domain_name
));
460 return NT_STATUS_NOT_IMPLEMENTED
;
463 /* No point is bothering if this is not a trusted domain.
464 This return makes "map to guest = bad user" work again.
465 The logic is that if we know nothing about the domain, that
466 user is not known to us and does not exist */
468 if ( !is_trusted_domain( user_info
->mapped
.domain_name
) )
469 return NT_STATUS_NOT_IMPLEMENTED
;
472 * Get the trusted account password for the trusted domain
473 * No need to become_root() as secrets_init() is done at startup.
476 if (!pdb_get_trusteddom_pw(user_info
->mapped
.domain_name
, &trust_password
,
478 DEBUG(0, ("check_trustdomain_security: could not fetch trust "
479 "account password for domain %s\n",
480 user_info
->mapped
.domain_name
));
481 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
484 #ifdef DEBUG_PASSWORD
485 DEBUG(100, ("Trust password for domain %s is %s\n", user_info
->mapped
.domain_name
,
488 E_md4hash(trust_password
, trust_md4_password
);
489 SAFE_FREE(trust_password
);
492 /* Test if machine password is expired and need to be changed */
493 if (time(NULL
) > last_change_time
+ (time_t)lp_machine_password_timeout())
495 global_machine_password_needs_changing
= True
;
499 /* use get_dc_name() for consistency even through we know that it will be
502 if ( !get_dc_name(user_info
->mapped
.domain_name
, NULL
, dc_name
, &dc_ss
) ) {
503 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
504 user_info
->mapped
.domain_name
));
505 return NT_STATUS_NO_LOGON_SERVERS
;
508 nt_status
= domain_client_validate(mem_ctx
,
510 user_info
->mapped
.domain_name
,
511 (uchar
*)auth_context
->challenge
.data
,
519 /* module initialisation */
520 static NTSTATUS
auth_init_trustdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
522 struct auth_methods
*result
;
524 result
= TALLOC_ZERO_P(auth_context
, struct auth_methods
);
525 if (result
== NULL
) {
526 return NT_STATUS_NO_MEMORY
;
528 result
->name
= "trustdomain";
529 result
->auth
= check_trustdomain_security
;
531 *auth_method
= result
;
535 NTSTATUS
auth_domain_init(void)
537 smb_register_auth(AUTH_INTERFACE_VERSION
, "trustdomain", auth_init_trustdomain
);
538 smb_register_auth(AUTH_INTERFACE_VERSION
, "ntdomain", auth_init_ntdomain
);