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
;
30 * Connect to a remote server for (inter)domain security authenticaion.
32 * @param cli the cli to return containing the active connection
33 * @param server either a machine name or text IP address to
35 * @param setup_creds_as domain account to setup credentials as
36 * @param sec_chan a switch value to distinguish between domain
37 * member and interdomain authentication
38 * @param trust_passwd the trust password to establish the
43 static NTSTATUS
connect_to_domain_password_server(struct cli_state
**cli
,
47 struct rpc_pipe_client
**pipe_ret
,
51 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
57 /* TODO: Send a SAMLOGON request to determine whether this is a valid
58 logonserver. We can avoid a 30-second timeout if the DC is down
59 if the SAMLOGON request fails as it is only over UDP. */
61 /* we use a mutex to prevent two connections at once - when a
62 Win2k PDC get two connections where one hasn't completed a
63 session setup yet it will send a TCP reset to the first
64 connection (tridge) */
67 * With NT4.x DC's *all* authentication must be serialized to avoid
68 * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
71 if (!grab_server_mutex(dc_name
)) {
72 return NT_STATUS_NO_LOGON_SERVERS
;
75 /* Attempt connection */
77 result
= cli_full_connection(cli
, global_myname(), dc_name
, &dc_ip
, 0,
78 "IPC$", "IPC", "", "", "", 0, Undefined
, retry
);
80 if (!NT_STATUS_IS_OK(result
)) {
81 /* map to something more useful */
82 if (NT_STATUS_EQUAL(result
, NT_STATUS_UNSUCCESSFUL
)) {
83 result
= NT_STATUS_NO_LOGON_SERVERS
;
91 release_server_mutex();
96 * We now have an anonymous connection to IPC$ on the domain password server.
100 * Even if the connect succeeds we need to setup the netlogon
101 * pipe here. We do this as we may just have changed the domain
102 * account password on the PDC and yet we may be talking to
103 * a BDC that doesn't have this replicated yet. In this case
104 * a successful connect to a DC needs to take the netlogon connect
105 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
108 /* open the netlogon pipe. */
109 if (lp_client_schannel()) {
110 /* We also setup the creds chain in the open_schannel call. */
111 netlogon_pipe
= cli_rpc_pipe_open_schannel(*cli
, PI_NETLOGON
,
112 PIPE_AUTH_LEVEL_PRIVACY
, domain
, &result
);
114 netlogon_pipe
= cli_rpc_pipe_open_noauth(*cli
, PI_NETLOGON
, &result
);
118 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
119 machine %s. Error was : %s.\n", dc_name
, nt_errstr(result
)));
122 release_server_mutex();
126 if (!lp_client_schannel()) {
127 /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
128 uint32 neg_flags
= NETLOGON_NEG_AUTH2_FLAGS
;
129 uint32 sec_chan_type
= 0;
130 unsigned char machine_pwd
[16];
132 if (!get_trust_pw(domain
, machine_pwd
, &sec_chan_type
)) {
133 DEBUG(0, ("connect_to_domain_password_server: could not fetch "
134 "trust account password for domain '%s'\n",
138 release_server_mutex();
139 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
142 result
= rpccli_netlogon_setup_creds(netlogon_pipe
,
143 dc_name
, /* server name */
145 global_myname(), /* client name */
146 global_myname(), /* machine account name */
151 if (!NT_STATUS_IS_OK(result
)) {
154 release_server_mutex();
160 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
161 machine %s. Error was : %s.\n", dc_name
, cli_errstr(*cli
)));
164 release_server_mutex();
165 return NT_STATUS_NO_LOGON_SERVERS
;
168 /* We exit here with the mutex *locked*. JRA */
170 *pipe_ret
= netlogon_pipe
;
175 /***********************************************************************
176 Do the same as security=server, but using NT Domain calls and a session
177 key from the machine password. If the server parameter is specified
178 use it, otherwise figure out a server from the 'password server' param.
179 ************************************************************************/
181 static NTSTATUS
domain_client_validate(TALLOC_CTX
*mem_ctx
,
182 const auth_usersupplied_info
*user_info
,
185 auth_serversupplied_info
**server_info
,
187 struct in_addr dc_ip
)
190 NET_USER_INFO_3 info3
;
191 struct cli_state
*cli
= NULL
;
192 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
193 NTSTATUS nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
198 * At this point, smb_apasswd points to the lanman response to
199 * the challenge in local_challenge, and smb_ntpasswd points to
200 * the NT response to the challenge in local_challenge. Ship
201 * these over the secure channel to a domain controller and
202 * see if they were valid.
205 /* rety loop for robustness */
207 for (i
= 0; !NT_STATUS_IS_OK(nt_status
) && retry
&& (i
< 3); i
++) {
208 nt_status
= connect_to_domain_password_server(&cli
,
216 if ( !NT_STATUS_IS_OK(nt_status
) ) {
217 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
218 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_ACCESS_DENIED
)) {
219 return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE
;
224 /* store a successful connection */
226 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 (*server_info
)->was_mapped
|= user_info
->was_mapped
;
273 if ( ! (*server_info
)->guest
) {
274 /* if a real user check pam account restrictions */
275 /* only really perfomed if "obey pam restriction" is true */
276 nt_status
= smb_pam_accountcheck((*server_info
)->unix_name
);
277 if ( !NT_STATUS_IS_OK(nt_status
)) {
278 DEBUG(1, ("PAM account restriction prevents user login\n"));
285 netsamlogon_cache_store( user_info
->smb_name
, &info3
);
288 /* Note - once the cli stream is shutdown the mem_ctx used
289 to allocate the other_sids and gids structures has been deleted - so
290 these pointers are no longer valid..... */
296 /****************************************************************************
297 Check for a valid username and password in security=domain mode.
298 ****************************************************************************/
300 static NTSTATUS
check_ntdomain_security(const struct auth_context
*auth_context
,
301 void *my_private_data
,
303 const auth_usersupplied_info
*user_info
,
304 auth_serversupplied_info
**server_info
)
306 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
307 const char *domain
= lp_workgroup();
309 struct in_addr dc_ip
;
311 if ( lp_server_role() != ROLE_DOMAIN_MEMBER
) {
312 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
313 "ntdomain auth method when not a member of a domain.\n"));
314 return NT_STATUS_NOT_IMPLEMENTED
;
317 if (!user_info
|| !server_info
|| !auth_context
) {
318 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
319 return NT_STATUS_INVALID_PARAMETER
;
323 * Check that the requested domain is not our own machine name.
324 * If it is, we should never check the PDC here, we use our own local
328 if(strequal(get_global_sam_name(), user_info
->domain
)) {
329 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
330 return NT_STATUS_NOT_IMPLEMENTED
;
333 /* we need our DC to send the net_sam_logon() request to */
335 if ( !get_dc_name(domain
, NULL
, dc_name
, &dc_ip
) ) {
336 DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
338 return NT_STATUS_NO_LOGON_SERVERS
;
341 nt_status
= domain_client_validate(mem_ctx
,
344 (uchar
*)auth_context
->challenge
.data
,
352 /* module initialisation */
353 static NTSTATUS
auth_init_ntdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
355 if (!make_auth_methods(auth_context
, auth_method
)) {
356 return NT_STATUS_NO_MEMORY
;
359 (*auth_method
)->name
= "ntdomain";
360 (*auth_method
)->auth
= check_ntdomain_security
;
365 /****************************************************************************
366 Check for a valid username and password in a trusted domain
367 ****************************************************************************/
369 static NTSTATUS
check_trustdomain_security(const struct auth_context
*auth_context
,
370 void *my_private_data
,
372 const auth_usersupplied_info
*user_info
,
373 auth_serversupplied_info
**server_info
)
375 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
376 unsigned char trust_md4_password
[16];
377 char *trust_password
;
378 time_t last_change_time
;
381 struct in_addr dc_ip
;
383 if (!user_info
|| !server_info
|| !auth_context
) {
384 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
385 return NT_STATUS_INVALID_PARAMETER
;
389 * Check that the requested domain is not our own machine name or domain name.
392 if( strequal(get_global_sam_name(), user_info
->domain
)) {
393 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
395 return NT_STATUS_NOT_IMPLEMENTED
;
398 /* No point is bothering if this is not a trusted domain.
399 This return makes "map to guest = bad user" work again.
400 The logic is that if we know nothing about the domain, that
401 user is not known to us and does not exist */
403 if ( !is_trusted_domain( user_info
->domain
) )
404 return NT_STATUS_NOT_IMPLEMENTED
;
407 * Get the trusted account password for the trusted domain
408 * No need to become_root() as secrets_init() is done at startup.
411 if (!secrets_fetch_trusted_domain_password(user_info
->domain
, &trust_password
,
412 &sid
, &last_change_time
)) {
413 DEBUG(0, ("check_trustdomain_security: could not fetch trust "
414 "account password for domain %s\n",
416 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
419 #ifdef DEBUG_PASSWORD
420 DEBUG(100, ("Trust password for domain %s is %s\n", user_info
->domain
,
423 E_md4hash(trust_password
, trust_md4_password
);
424 SAFE_FREE(trust_password
);
427 /* Test if machine password is expired and need to be changed */
428 if (time(NULL
) > last_change_time
+ (time_t)lp_machine_password_timeout())
430 global_machine_password_needs_changing
= True
;
434 /* use get_dc_name() for consistency even through we know that it will be
437 if ( !get_dc_name(user_info
->domain
, NULL
, dc_name
, &dc_ip
) ) {
438 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
440 return NT_STATUS_NO_LOGON_SERVERS
;
443 nt_status
= domain_client_validate(mem_ctx
,
446 (uchar
*)auth_context
->challenge
.data
,
454 /* module initialisation */
455 static NTSTATUS
auth_init_trustdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
457 if (!make_auth_methods(auth_context
, auth_method
)) {
458 return NT_STATUS_NO_MEMORY
;
461 (*auth_method
)->name
= "trustdomain";
462 (*auth_method
)->auth
= check_trustdomain_security
;
466 NTSTATUS
auth_domain_init(void)
468 smb_register_auth(AUTH_INTERFACE_VERSION
, "trustdomain", auth_init_trustdomain
);
469 smb_register_auth(AUTH_INTERFACE_VERSION
, "ntdomain", auth_init_ntdomain
);