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_pipe.h"
25 #include "rpc_client/cli_netlogon.h"
29 #define DBGC_CLASS DBGC_AUTH
31 extern bool global_machine_password_needs_changing
;
32 static struct named_mutex
*mutex
;
35 * Change machine password (called from main loop
36 * idle timeout. Must be done as root.
39 void attempt_machine_password_change(void)
41 unsigned char trust_passwd_hash
[16];
45 if (!global_machine_password_needs_changing
) {
49 if (lp_security() != SEC_DOMAIN
) {
54 * We're in domain level security, and the code that
55 * read the machine password flagged that the machine
56 * password needs changing.
60 * First, open the machine password file with an exclusive lock.
63 lock
= secrets_get_trust_account_lock(NULL
, lp_workgroup());
66 DEBUG(0,("attempt_machine_password_change: unable to lock "
67 "the machine account password for machine %s in "
69 global_myname(), lp_workgroup() ));
73 if(!secrets_fetch_trust_account_password(lp_workgroup(),
74 trust_passwd_hash
, &lct
, NULL
)) {
75 DEBUG(0,("attempt_machine_password_change: unable to read the "
76 "machine account password for %s in domain %s.\n",
77 global_myname(), lp_workgroup()));
83 * Make sure someone else hasn't already done this.
86 if(time(NULL
) < lct
+ lp_machine_password_timeout()) {
87 global_machine_password_needs_changing
= false;
92 /* always just contact the PDC here */
94 change_trust_account_password( lp_workgroup(), NULL
);
95 global_machine_password_needs_changing
= false;
100 * Connect to a remote server for (inter)domain security authenticaion.
102 * @param cli the cli to return containing the active connection
103 * @param server either a machine name or text IP address to
105 * @param setup_creds_as domain account to setup credentials as
106 * @param sec_chan a switch value to distinguish between domain
107 * member and interdomain authentication
108 * @param trust_passwd the trust password to establish the
113 static NTSTATUS
connect_to_domain_password_server(struct cli_state
**cli
,
116 struct sockaddr_storage
*dc_ss
,
117 struct rpc_pipe_client
**pipe_ret
)
120 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
126 /* TODO: Send a SAMLOGON request to determine whether this is a valid
127 logonserver. We can avoid a 30-second timeout if the DC is down
128 if the SAMLOGON request fails as it is only over UDP. */
130 /* we use a mutex to prevent two connections at once - when a
131 Win2k PDC get two connections where one hasn't completed a
132 session setup yet it will send a TCP reset to the first
133 connection (tridge) */
136 * With NT4.x DC's *all* authentication must be serialized to avoid
137 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
140 mutex
= grab_named_mutex(NULL
, dc_name
, 10);
142 return NT_STATUS_NO_LOGON_SERVERS
;
145 /* Attempt connection */
146 result
= cli_full_connection(cli
, global_myname(), dc_name
, dc_ss
, 0,
147 "IPC$", "IPC", "", "", "", 0, Undefined
);
149 if (!NT_STATUS_IS_OK(result
)) {
150 /* map to something more useful */
151 if (NT_STATUS_EQUAL(result
, NT_STATUS_UNSUCCESSFUL
)) {
152 result
= NT_STATUS_NO_LOGON_SERVERS
;
165 * We now have an anonymous connection to IPC$ on the domain password server.
169 * Even if the connect succeeds we need to setup the netlogon
170 * pipe here. We do this as we may just have changed the domain
171 * account password on the PDC and yet we may be talking to
172 * a BDC that doesn't have this replicated yet. In this case
173 * a successful connect to a DC needs to take the netlogon connect
174 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
177 /* open the netlogon pipe. */
178 if (lp_client_schannel()) {
179 /* We also setup the creds chain in the open_schannel call. */
180 result
= cli_rpc_pipe_open_schannel(
181 *cli
, &ndr_table_netlogon
.syntax_id
, NCACN_NP
,
182 DCERPC_AUTH_LEVEL_PRIVACY
, domain
, &netlogon_pipe
);
184 result
= cli_rpc_pipe_open_noauth(
185 *cli
, &ndr_table_netlogon
.syntax_id
, &netlogon_pipe
);
188 if (!NT_STATUS_IS_OK(result
)) {
189 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
190 machine %s. Error was : %s.\n", dc_name
, nt_errstr(result
)));
197 if (!lp_client_schannel()) {
198 /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
199 uint32_t neg_flags
= NETLOGON_NEG_AUTH2_ADS_FLAGS
;
200 enum netr_SchannelType sec_chan_type
= 0;
201 unsigned char machine_pwd
[16];
202 const char *account_name
;
204 if (!get_trust_pw_hash(domain
, machine_pwd
, &account_name
,
207 DEBUG(0, ("connect_to_domain_password_server: could not fetch "
208 "trust account password for domain '%s'\n",
213 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
216 result
= rpccli_netlogon_setup_creds(netlogon_pipe
,
217 dc_name
, /* server name */
219 global_myname(), /* client name */
220 account_name
, /* machine account name */
225 if (!NT_STATUS_IS_OK(result
)) {
234 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
235 machine %s. Error was : %s.\n", dc_name
, cli_errstr(*cli
)));
239 return NT_STATUS_NO_LOGON_SERVERS
;
242 /* We exit here with the mutex *locked*. JRA */
244 *pipe_ret
= netlogon_pipe
;
249 /***********************************************************************
250 Do the same as security=server, but using NT Domain calls and a session
251 key from the machine password. If the server parameter is specified
252 use it, otherwise figure out a server from the 'password server' param.
253 ************************************************************************/
255 static NTSTATUS
domain_client_validate(TALLOC_CTX
*mem_ctx
,
256 const struct auth_usersupplied_info
*user_info
,
259 struct auth_serversupplied_info
**server_info
,
261 struct sockaddr_storage
*dc_ss
)
264 struct netr_SamInfo3
*info3
= NULL
;
265 struct cli_state
*cli
= NULL
;
266 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
267 NTSTATUS nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
271 * At this point, smb_apasswd points to the lanman response to
272 * the challenge in local_challenge, and smb_ntpasswd points to
273 * the NT response to the challenge in local_challenge. Ship
274 * these over the secure channel to a domain controller and
275 * see if they were valid.
278 /* rety loop for robustness */
280 for (i
= 0; !NT_STATUS_IS_OK(nt_status
) && (i
< 3); i
++) {
281 nt_status
= connect_to_domain_password_server(&cli
,
288 if ( !NT_STATUS_IS_OK(nt_status
) ) {
289 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
290 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_ACCESS_DENIED
)) {
291 return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE
;
296 /* store a successful connection */
298 saf_store( domain
, cli
->desthost
);
301 * If this call succeeds, we now have lots of info about the user
302 * in the info3 structure.
305 nt_status
= rpccli_netlogon_sam_network_logon(netlogon_pipe
,
307 user_info
->logon_parameters
, /* flags such as 'allow workstation logon' */
308 dc_name
, /* server name */
309 user_info
->client
.account_name
, /* user name logging on. */
310 user_info
->client
.domain_name
, /* domain name */
311 user_info
->workstation_name
, /* workstation name */
312 chal
, /* 8 byte challenge. */
313 3, /* validation level */
314 user_info
->password
.response
.lanman
, /* lanman 24 byte response */
315 user_info
->password
.response
.nt
, /* nt 24 byte response */
316 &info3
); /* info3 out */
318 /* Let go as soon as possible so we avoid any potential deadlocks
319 with winbind lookup up users or groups. */
323 if (!NT_STATUS_IS_OK(nt_status
)) {
324 DEBUG(0,("domain_client_validate: unable to validate password "
325 "for user %s in domain %s to Domain controller %s. "
326 "Error was %s.\n", user_info
->client
.account_name
,
327 user_info
->client
.domain_name
, dc_name
,
328 nt_errstr(nt_status
)));
330 /* map to something more useful */
331 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_UNSUCCESSFUL
)) {
332 nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
335 nt_status
= make_server_info_info3(mem_ctx
,
336 user_info
->client
.account_name
,
341 if (NT_STATUS_IS_OK(nt_status
)) {
342 (*server_info
)->nss_token
|= user_info
->was_mapped
;
343 netsamlogon_cache_store(user_info
->client
.account_name
, info3
);
348 /* Note - once the cli stream is shutdown the mem_ctx used
349 to allocate the other_sids and gids structures has been deleted - so
350 these pointers are no longer valid..... */
356 /****************************************************************************
357 Check for a valid username and password in security=domain mode.
358 ****************************************************************************/
360 static NTSTATUS
check_ntdomain_security(const struct auth_context
*auth_context
,
361 void *my_private_data
,
363 const struct auth_usersupplied_info
*user_info
,
364 struct auth_serversupplied_info
**server_info
)
366 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
367 const char *domain
= lp_workgroup();
369 struct sockaddr_storage dc_ss
;
371 if ( lp_server_role() != ROLE_DOMAIN_MEMBER
) {
372 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
373 "ntdomain auth method when not a member of a domain.\n"));
374 return NT_STATUS_NOT_IMPLEMENTED
;
377 if (!user_info
|| !server_info
|| !auth_context
) {
378 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
379 return NT_STATUS_INVALID_PARAMETER
;
382 DEBUG(10, ("Check auth for: [%s]\n", user_info
->mapped
.account_name
));
385 * Check that the requested domain is not our own machine name.
386 * If it is, we should never check the PDC here, we use our own local
390 if(strequal(get_global_sam_name(), user_info
->mapped
.domain_name
)) {
391 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
392 return NT_STATUS_NOT_IMPLEMENTED
;
395 /* we need our DC to send the net_sam_logon() request to */
397 if ( !get_dc_name(domain
, NULL
, dc_name
, &dc_ss
) ) {
398 DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
399 user_info
->mapped
.domain_name
));
400 return NT_STATUS_NO_LOGON_SERVERS
;
403 nt_status
= domain_client_validate(mem_ctx
,
406 (uchar
*)auth_context
->challenge
.data
,
414 /* module initialisation */
415 static NTSTATUS
auth_init_ntdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
417 struct auth_methods
*result
;
419 result
= TALLOC_ZERO_P(auth_context
, struct auth_methods
);
420 if (result
== NULL
) {
421 return NT_STATUS_NO_MEMORY
;
423 result
->name
= "ntdomain";
424 result
->auth
= check_ntdomain_security
;
426 *auth_method
= result
;
431 /****************************************************************************
432 Check for a valid username and password in a trusted domain
433 ****************************************************************************/
435 static NTSTATUS
check_trustdomain_security(const struct auth_context
*auth_context
,
436 void *my_private_data
,
438 const struct auth_usersupplied_info
*user_info
,
439 struct auth_serversupplied_info
**server_info
)
441 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
442 unsigned char trust_md4_password
[16];
443 char *trust_password
;
445 struct sockaddr_storage dc_ss
;
447 if (!user_info
|| !server_info
|| !auth_context
) {
448 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
449 return NT_STATUS_INVALID_PARAMETER
;
452 DEBUG(10, ("Check auth for: [%s]\n", user_info
->mapped
.account_name
));
455 * Check that the requested domain is not our own machine name or domain name.
458 if( strequal(get_global_sam_name(), user_info
->mapped
.domain_name
)) {
459 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
460 user_info
->mapped
.domain_name
));
461 return NT_STATUS_NOT_IMPLEMENTED
;
464 /* No point is bothering if this is not a trusted domain.
465 This return makes "map to guest = bad user" work again.
466 The logic is that if we know nothing about the domain, that
467 user is not known to us and does not exist */
469 if ( !is_trusted_domain( user_info
->mapped
.domain_name
) )
470 return NT_STATUS_NOT_IMPLEMENTED
;
473 * Get the trusted account password for the trusted domain
474 * No need to become_root() as secrets_init() is done at startup.
477 if (!pdb_get_trusteddom_pw(user_info
->mapped
.domain_name
, &trust_password
,
479 DEBUG(0, ("check_trustdomain_security: could not fetch trust "
480 "account password for domain %s\n",
481 user_info
->mapped
.domain_name
));
482 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
485 #ifdef DEBUG_PASSWORD
486 DEBUG(100, ("Trust password for domain %s is %s\n", user_info
->mapped
.domain_name
,
489 E_md4hash(trust_password
, trust_md4_password
);
490 SAFE_FREE(trust_password
);
493 /* Test if machine password is expired and need to be changed */
494 if (time(NULL
) > last_change_time
+ (time_t)lp_machine_password_timeout())
496 global_machine_password_needs_changing
= True
;
500 /* use get_dc_name() for consistency even through we know that it will be
503 if ( !get_dc_name(user_info
->mapped
.domain_name
, NULL
, dc_name
, &dc_ss
) ) {
504 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
505 user_info
->mapped
.domain_name
));
506 return NT_STATUS_NO_LOGON_SERVERS
;
509 nt_status
= domain_client_validate(mem_ctx
,
511 user_info
->mapped
.domain_name
,
512 (uchar
*)auth_context
->challenge
.data
,
520 /* module initialisation */
521 static NTSTATUS
auth_init_trustdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
523 struct auth_methods
*result
;
525 result
= TALLOC_ZERO_P(auth_context
, struct auth_methods
);
526 if (result
== NULL
) {
527 return NT_STATUS_NO_MEMORY
;
529 result
->name
= "trustdomain";
530 result
->auth
= check_trustdomain_security
;
532 *auth_method
= result
;
536 NTSTATUS
auth_domain_init(void)
538 smb_register_auth(AUTH_INTERFACE_VERSION
, "trustdomain", auth_init_trustdomain
);
539 smb_register_auth(AUTH_INTERFACE_VERSION
, "ntdomain", auth_init_ntdomain
);