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
;
29 extern userdom_struct current_user_info
;
33 resolve the name of a DC in ways appropriate for an ADS domain mode
34 an ADS domain may not have Netbios enabled at all, so this is
35 quite different from the RPC case
36 Note that we ignore the 'server' parameter here. That has the effect of using
37 the 'ADS server' smb.conf parameter, which is what we really want anyway
39 static NTSTATUS
ads_resolve_dc(fstring remote_machine
,
40 struct in_addr
*dest_ip
)
43 ads
= ads_init_simple();
45 return NT_STATUS_NO_LOGON_SERVERS
;
48 DEBUG(4,("ads_resolve_dc: realm=%s\n", ads
->config
.realm
));
50 ads
->auth
.flags
|= ADS_AUTH_NO_BIND
;
53 /* a full ads_connect() is actually overkill, as we don't srictly need
54 to do the SASL auth in order to get the info we need, but libads
55 doesn't offer a better way right now */
59 fstrcpy(remote_machine
, ads
->config
.ldap_server_name
);
60 strupper(remote_machine
);
61 *dest_ip
= ads
->ldap_ip
;
64 if (!*remote_machine
|| is_zero_ip(*dest_ip
)) {
65 return NT_STATUS_NO_LOGON_SERVERS
;
68 DEBUG(4,("ads_resolve_dc: using server='%s' IP=%s\n",
69 remote_machine
, inet_ntoa(*dest_ip
)));
75 resolve the name of a DC in ways appropriate for RPC domain mode
76 this relies on the server supporting netbios and port 137 not being
79 static NTSTATUS
rpc_resolve_dc(const char *server
,
80 fstring remote_machine
,
81 struct in_addr
*dest_ip
)
83 if (is_ipaddress(server
)) {
84 struct in_addr to_ip
= *interpret_addr2(server
);
86 /* we need to know the machines netbios name - this is a lousy
87 way to find it, but until we have a RPC call that does this
89 if (!name_status_find("*", 0x20, 0x20, to_ip
, remote_machine
)) {
90 DEBUG(2, ("rpc_resolve_dc: Can't resolve name for IP %s\n", server
));
91 return NT_STATUS_NO_LOGON_SERVERS
;
98 fstrcpy(remote_machine
, server
);
99 strupper(remote_machine
);
100 if (!resolve_name(remote_machine
, dest_ip
, 0x20)) {
101 DEBUG(1,("rpc_resolve_dc: Can't resolve address for %s\n",
103 return NT_STATUS_NO_LOGON_SERVERS
;
106 DEBUG(4,("rpc_resolve_dc: using server='%s' IP=%s\n",
107 remote_machine
, inet_ntoa(*dest_ip
)));
113 * Connect to a remote server for domain security authenticaion.
115 * @param cli the cli to return containing the active connection
116 * @param server either a machine name or text IP address to
118 * @param trust_passwd the trust password to establish the
123 static NTSTATUS
connect_to_domain_password_server(struct cli_state
**cli
,
125 const char *setup_creds_as
,
127 const unsigned char *trust_passwd
,
130 struct in_addr dest_ip
;
131 fstring remote_machine
;
136 if (lp_security() == SEC_ADS
)
137 result
= ads_resolve_dc(remote_machine
, &dest_ip
);
139 result
= rpc_resolve_dc(server
, remote_machine
, &dest_ip
);
141 if (!NT_STATUS_IS_OK(result
)) {
142 DEBUG(2,("connect_to_domain_password_server: unable to resolve DC: %s\n",
147 if (ismyip(dest_ip
)) {
148 DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
150 return NT_STATUS_NO_LOGON_SERVERS
;
153 /* TODO: Send a SAMLOGON request to determine whether this is a valid
154 logonserver. We can avoid a 30-second timeout if the DC is down
155 if the SAMLOGON request fails as it is only over UDP. */
157 /* we use a mutex to prevent two connections at once - when a
158 Win2k PDC get two connections where one hasn't completed a
159 session setup yet it will send a TCP reset to the first
160 connection (tridge) */
163 * With NT4.x DC's *all* authentication must be serialized to avoid
164 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
169 if (!grab_server_mutex(server
))
170 return NT_STATUS_NO_LOGON_SERVERS
;
172 /* Attempt connection */
173 result
= cli_full_connection(cli
, global_myname(), remote_machine
,
174 &dest_ip
, 0, "IPC$", "IPC", "", "", "",0, retry
);
176 if (!NT_STATUS_IS_OK(result
)) {
177 /* map to something more useful */
178 if (NT_STATUS_EQUAL(result
, NT_STATUS_UNSUCCESSFUL
)) {
179 result
= NT_STATUS_NO_LOGON_SERVERS
;
182 release_server_mutex();
187 * We now have an anonymous connection to IPC$ on the domain password server.
191 * Even if the connect succeeds we need to setup the netlogon
192 * pipe here. We do this as we may just have changed the domain
193 * account password on the PDC and yet we may be talking to
194 * a BDC that doesn't have this replicated yet. In this case
195 * a successful connect to a DC needs to take the netlogon connect
196 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
199 if(cli_nt_session_open(*cli
, PI_NETLOGON
) == False
) {
200 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
201 machine %s. Error was : %s.\n", remote_machine
, cli_errstr(*cli
)));
202 cli_nt_session_close(*cli
);
205 release_server_mutex();
206 return NT_STATUS_NO_LOGON_SERVERS
;
209 snprintf((*cli
)->mach_acct
, sizeof((*cli
)->mach_acct
) - 1, "%s$", setup_creds_as
);
211 if (!(*cli
)->mach_acct
) {
212 release_server_mutex();
213 return NT_STATUS_NO_MEMORY
;
216 result
= cli_nt_establish_netlogon(*cli
, sec_chan
, trust_passwd
);
218 if (!NT_STATUS_IS_OK(result
)) {
219 DEBUG(0,("connect_to_domain_password_server: unable to setup the NETLOGON credentials to machine \
220 %s. Error was : %s.\n", remote_machine
, nt_errstr(result
)));
221 cli_nt_session_close(*cli
);
224 release_server_mutex();
228 /* We exit here with the mutex *locked*. JRA */
233 /***********************************************************************
234 Utility function to attempt a connection to an IP address of a DC.
235 ************************************************************************/
237 static NTSTATUS
attempt_connect_to_dc(struct cli_state
**cli
,
240 const char *setup_creds_as
,
242 const unsigned char *trust_passwd
)
244 NTSTATUS ret
= NT_STATUS_UNSUCCESSFUL
;
250 * Ignore addresses we have already tried.
254 return NT_STATUS_NO_LOGON_SERVERS
;
256 if (!lookup_dc_name(global_myname(), domain
, ip
, dc_name
))
257 return NT_STATUS_NO_LOGON_SERVERS
;
259 for (i
= 0; (!NT_STATUS_IS_OK(ret
)) && retry
&& (i
< 3); i
++)
260 ret
= connect_to_domain_password_server(cli
, dc_name
, setup_creds_as
,
261 sec_chan
, trust_passwd
, &retry
);
265 /***********************************************************************
266 We have been asked to dynamically determine the IP addresses of
267 the PDC and BDC's for DOMAIN, and query them in turn.
268 ************************************************************************/
269 static NTSTATUS
find_connect_dc(struct cli_state
**cli
,
271 const char *setup_creds_as
,
273 unsigned char *trust_passwd
,
274 time_t last_change_time
)
276 struct in_addr dc_ip
;
279 if (!rpc_find_dc(domain
, srv_name
, &dc_ip
)) {
280 DEBUG(0,("find_connect_dc: Failed to find an DCs for %s\n", lp_workgroup()));
281 return NT_STATUS_NO_LOGON_SERVERS
;
284 return attempt_connect_to_dc( cli
, domain
, &dc_ip
, setup_creds_as
,
285 sec_chan
, trust_passwd
);
288 /***********************************************************************
289 Do the same as security=server, but using NT Domain calls and a session
290 key from the machine password. If the server parameter is specified
291 use it, otherwise figure out a server from the 'password server' param.
292 ************************************************************************/
294 static NTSTATUS
domain_client_validate(TALLOC_CTX
*mem_ctx
,
295 const auth_usersupplied_info
*user_info
,
298 auth_serversupplied_info
**server_info
,
299 const char *server
, const char *setup_creds_as
,
301 unsigned char trust_passwd
[16],
302 time_t last_change_time
)
304 fstring remote_machine
;
305 NET_USER_INFO_3 info3
;
306 struct cli_state
*cli
= NULL
;
307 NTSTATUS nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
310 * At this point, smb_apasswd points to the lanman response to
311 * the challenge in local_challenge, and smb_ntpasswd points to
312 * the NT response to the challenge in local_challenge. Ship
313 * these over the secure channel to a domain controller and
314 * see if they were valid.
317 while (!NT_STATUS_IS_OK(nt_status
) &&
318 next_token(&server
,remote_machine
,LIST_SEP
,sizeof(remote_machine
))) {
319 if(lp_security() != SEC_ADS
&& strequal(remote_machine
, "*")) {
320 nt_status
= find_connect_dc(&cli
, domain
, setup_creds_as
, sec_chan
, trust_passwd
, last_change_time
);
324 for (i
= 0; !NT_STATUS_IS_OK(nt_status
) && retry
&& (i
< 3); i
++)
325 nt_status
= connect_to_domain_password_server(&cli
, remote_machine
, setup_creds_as
,
326 sec_chan
, trust_passwd
, &retry
);
330 if (!NT_STATUS_IS_OK(nt_status
)) {
331 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
338 * If this call succeeds, we now have lots of info about the user
339 * in the info3 structure.
342 nt_status
= cli_netlogon_sam_network_logon(cli
, mem_ctx
,
344 user_info
->smb_name
.str
, user_info
->domain
.str
,
345 user_info
->wksta_name
.str
, chal
,
346 user_info
->lm_resp
, user_info
->nt_resp
,
349 if (!NT_STATUS_IS_OK(nt_status
)) {
350 DEBUG(0,("domain_client_validate: unable to validate password "
351 "for user %s in domain %s to Domain controller %s. "
352 "Error was %s.\n", user_info
->smb_name
.str
,
353 user_info
->domain
.str
, cli
->srv_name_slash
,
354 nt_errstr(nt_status
)));
356 /* map to something more useful */
357 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_UNSUCCESSFUL
)) {
358 nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
361 nt_status
= make_server_info_info3(mem_ctx
, user_info
->internal_username
.str
,
362 user_info
->smb_name
.str
, domain
, server_info
, &info3
);
363 uni_group_cache_store_netlogon(mem_ctx
, &info3
);
368 * We don't actually need to do this - plus it fails currently with
369 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
373 if (NT_STATUS_IS_OK(status
)) {
374 if(cli_nt_logoff(&cli
, &ctr
) == False
) {
375 DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
376 %s to Domain controller %s. Error was %s.\n", user
, domain
, remote_machine
, cli_errstr(&cli
)));
377 nt_status
= NT_STATUS_LOGON_FAILURE
;
382 /* Note - once the cli stream is shutdown the mem_ctx used
383 to allocate the other_sids and gids structures has been deleted - so
384 these pointers are no longer valid..... */
386 cli_nt_session_close(cli
);
389 release_server_mutex();
393 /****************************************************************************
394 Check for a valid username and password in security=domain mode.
395 ****************************************************************************/
397 static NTSTATUS
check_ntdomain_security(const struct auth_context
*auth_context
,
398 void *my_private_data
,
400 const auth_usersupplied_info
*user_info
,
401 auth_serversupplied_info
**server_info
)
403 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
404 char *password_server
;
405 unsigned char trust_passwd
[16];
406 time_t last_change_time
;
407 const char *domain
= lp_workgroup();
408 uint32 sec_channel_type
= 0;
410 if (!user_info
|| !server_info
|| !auth_context
) {
411 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
412 return NT_STATUS_INVALID_PARAMETER
;
416 * Check that the requested domain is not our own machine name.
417 * If it is, we should never check the PDC here, we use our own local
421 if(is_myname(user_info
->domain
.str
)) {
422 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
423 return NT_STATUS_LOGON_FAILURE
;
427 * Get the machine account password for our primary domain
428 * No need to become_root() as secrets_init() is done at startup.
431 if (!secrets_fetch_trust_account_password(domain
, trust_passwd
, &last_change_time
, &sec_channel_type
))
433 DEBUG(0, ("check_ntdomain_security: could not fetch trust account password for domain '%s'\n", domain
));
434 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
437 /* Test if machine password has expired and needs to be changed */
438 if (lp_machine_password_timeout()) {
439 if (last_change_time
> 0 &&
440 time(NULL
) > (last_change_time
+
441 lp_machine_password_timeout())) {
442 global_machine_password_needs_changing
= True
;
447 * Treat each name in the 'password server =' line as a potential
448 * PDC/BDC. Contact each in turn and try and authenticate.
451 password_server
= lp_passwordserver();
453 nt_status
= domain_client_validate(mem_ctx
, user_info
, domain
,
454 (uchar
*)auth_context
->challenge
.data
,
456 password_server
, global_myname(), sec_channel_type
,trust_passwd
, last_change_time
);
460 /* module initialisation */
461 NTSTATUS
auth_init_ntdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
463 if (!make_auth_methods(auth_context
, auth_method
)) {
464 return NT_STATUS_NO_MEMORY
;
467 (*auth_method
)->name
= "ntdomain";
468 (*auth_method
)->auth
= check_ntdomain_security
;
473 /****************************************************************************
474 Check for a valid username and password in a trusted domain
475 ****************************************************************************/
477 static NTSTATUS
check_trustdomain_security(const struct auth_context
*auth_context
,
478 void *my_private_data
,
480 const auth_usersupplied_info
*user_info
,
481 auth_serversupplied_info
**server_info
)
483 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
484 unsigned char trust_md4_password
[16];
485 char *trust_password
;
486 time_t last_change_time
;
489 if (!user_info
|| !server_info
|| !auth_context
) {
490 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
491 return NT_STATUS_INVALID_PARAMETER
;
495 * Check that the requested domain is not our own machine name.
496 * If it is, we should never check the PDC here, we use our own local
500 if(is_myname(user_info
->domain
.str
)) {
501 DEBUG(3,("check_trustdomain_security: Requested domain was for this machine.\n"));
502 return NT_STATUS_LOGON_FAILURE
;
506 * Check that the requested domain is not our own domain,
507 * If it is, we should use our own local password file.
510 if(strequal(lp_workgroup(), (user_info
->domain
.str
))) {
511 DEBUG(3,("check_trustdomain_security: Requested domain was for this domain.\n"));
512 return NT_STATUS_LOGON_FAILURE
;
516 * Get the trusted account password for the trusted domain
517 * No need to become_root() as secrets_init() is done at startup.
520 if (!secrets_fetch_trusted_domain_password(user_info
->domain
.str
, &trust_password
, &sid
, &last_change_time
))
522 DEBUG(0, ("check_trustdomain_security: could not fetch trust account password for domain %s\n", user_info
->domain
.str
));
523 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
526 #ifdef DEBUG_PASSWORD
527 DEBUG(100, ("Trust password for domain %s is %s\n", user_info
->domain
.str
, trust_password
));
529 E_md4hash(trust_password
, trust_md4_password
);
530 SAFE_FREE(trust_password
);
533 /* Test if machine password is expired and need to be changed */
534 if (time(NULL
) > last_change_time
+ lp_machine_password_timeout())
536 global_machine_password_needs_changing
= True
;
540 nt_status
= domain_client_validate(mem_ctx
, user_info
, user_info
->domain
.str
,
541 (uchar
*)auth_context
->challenge
.data
,
542 server_info
, "*" /* Do a lookup */,
543 lp_workgroup(), SEC_CHAN_DOMAIN
, trust_md4_password
, last_change_time
);
548 /* module initialisation */
549 NTSTATUS
auth_init_trustdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
551 if (!make_auth_methods(auth_context
, auth_method
)) {
552 return NT_STATUS_NO_MEMORY
;
555 (*auth_method
)->name
= "trustdomain";
556 (*auth_method
)->auth
= check_trustdomain_security
;
560 NTSTATUS
auth_domain_init(void)
562 smb_register_auth(AUTH_INTERFACE_VERSION
, "trustdomain", auth_init_trustdomain
);
563 smb_register_auth(AUTH_INTERFACE_VERSION
, "ntdomain", auth_init_ntdomain
);