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 * 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
,
46 struct sockaddr_storage
*dc_ss
,
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 mutex
= grab_named_mutex(NULL
, dc_name
, 10);
73 return NT_STATUS_NO_LOGON_SERVERS
;
76 /* Attempt connection */
78 result
= cli_full_connection(cli
, global_myname(), dc_name
, dc_ss
, 0,
79 "IPC$", "IPC", "", "", "", 0, Undefined
, retry
);
81 if (!NT_STATUS_IS_OK(result
)) {
82 /* map to something more useful */
83 if (NT_STATUS_EQUAL(result
, NT_STATUS_UNSUCCESSFUL
)) {
84 result
= NT_STATUS_NO_LOGON_SERVERS
;
97 * We now have an anonymous connection to IPC$ on the domain password server.
101 * Even if the connect succeeds we need to setup the netlogon
102 * pipe here. We do this as we may just have changed the domain
103 * account password on the PDC and yet we may be talking to
104 * a BDC that doesn't have this replicated yet. In this case
105 * a successful connect to a DC needs to take the netlogon connect
106 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
109 /* open the netlogon pipe. */
110 if (lp_client_schannel()) {
111 /* We also setup the creds chain in the open_schannel call. */
112 netlogon_pipe
= cli_rpc_pipe_open_schannel(*cli
, PI_NETLOGON
,
113 PIPE_AUTH_LEVEL_PRIVACY
, domain
, &result
);
115 netlogon_pipe
= cli_rpc_pipe_open_noauth(*cli
, PI_NETLOGON
, &result
);
119 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
120 machine %s. Error was : %s.\n", dc_name
, nt_errstr(result
)));
127 if (!lp_client_schannel()) {
128 /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
129 uint32_t neg_flags
= NETLOGON_NEG_AUTH2_ADS_FLAGS
;
130 uint32 sec_chan_type
= 0;
131 unsigned char machine_pwd
[16];
132 const char *account_name
;
134 if (!get_trust_pw_hash(domain
, machine_pwd
, &account_name
,
137 DEBUG(0, ("connect_to_domain_password_server: could not fetch "
138 "trust account password for domain '%s'\n",
143 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
146 result
= rpccli_netlogon_setup_creds(netlogon_pipe
,
147 dc_name
, /* server name */
149 global_myname(), /* client name */
150 account_name
, /* machine account name */
155 if (!NT_STATUS_IS_OK(result
)) {
164 DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
165 machine %s. Error was : %s.\n", dc_name
, cli_errstr(*cli
)));
169 return NT_STATUS_NO_LOGON_SERVERS
;
172 /* We exit here with the mutex *locked*. JRA */
174 *pipe_ret
= netlogon_pipe
;
179 /***********************************************************************
180 Do the same as security=server, but using NT Domain calls and a session
181 key from the machine password. If the server parameter is specified
182 use it, otherwise figure out a server from the 'password server' param.
183 ************************************************************************/
185 static NTSTATUS
domain_client_validate(TALLOC_CTX
*mem_ctx
,
186 const auth_usersupplied_info
*user_info
,
189 auth_serversupplied_info
**server_info
,
191 struct sockaddr_storage
*dc_ss
)
194 struct netr_SamInfo3
*info3
= NULL
;
195 struct cli_state
*cli
= NULL
;
196 struct rpc_pipe_client
*netlogon_pipe
= NULL
;
197 NTSTATUS nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
202 * At this point, smb_apasswd points to the lanman response to
203 * the challenge in local_challenge, and smb_ntpasswd points to
204 * the NT response to the challenge in local_challenge. Ship
205 * these over the secure channel to a domain controller and
206 * see if they were valid.
209 /* rety loop for robustness */
211 for (i
= 0; !NT_STATUS_IS_OK(nt_status
) && retry
&& (i
< 3); i
++) {
212 nt_status
= connect_to_domain_password_server(&cli
,
220 if ( !NT_STATUS_IS_OK(nt_status
) ) {
221 DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
222 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_ACCESS_DENIED
)) {
223 return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE
;
228 /* store a successful connection */
230 saf_store( domain
, cli
->desthost
);
233 * If this call succeeds, we now have lots of info about the user
234 * in the info3 structure.
237 nt_status
= rpccli_netlogon_sam_network_logon(netlogon_pipe
,
239 user_info
->logon_parameters
,/* flags such as 'allow workstation logon' */
240 dc_name
, /* server name */
241 user_info
->smb_name
, /* user name logging on. */
242 user_info
->client_domain
, /* domain name */
243 user_info
->wksta_name
, /* workstation name */
244 chal
, /* 8 byte challenge. */
245 user_info
->lm_resp
, /* lanman 24 byte response */
246 user_info
->nt_resp
, /* nt 24 byte response */
247 &info3
); /* info3 out */
249 /* Let go as soon as possible so we avoid any potential deadlocks
250 with winbind lookup up users or groups. */
254 if (!NT_STATUS_IS_OK(nt_status
)) {
255 DEBUG(0,("domain_client_validate: unable to validate password "
256 "for user %s in domain %s to Domain controller %s. "
257 "Error was %s.\n", user_info
->smb_name
,
258 user_info
->client_domain
, dc_name
,
259 nt_errstr(nt_status
)));
261 /* map to something more useful */
262 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_UNSUCCESSFUL
)) {
263 nt_status
= NT_STATUS_NO_LOGON_SERVERS
;
266 nt_status
= make_server_info_info3(mem_ctx
,
272 if (NT_STATUS_IS_OK(nt_status
)) {
273 (*server_info
)->nss_token
|= user_info
->was_mapped
;
275 if ( ! (*server_info
)->guest
) {
276 /* if a real user check pam account restrictions */
277 /* only really perfomed if "obey pam restriction" is true */
278 nt_status
= smb_pam_accountcheck((*server_info
)->unix_name
);
279 if ( !NT_STATUS_IS_OK(nt_status
)) {
280 DEBUG(1, ("PAM account restriction prevents user login\n"));
288 netsamlogon_cache_store(user_info
->smb_name
, info3
);
292 /* Note - once the cli stream is shutdown the mem_ctx used
293 to allocate the other_sids and gids structures has been deleted - so
294 these pointers are no longer valid..... */
300 /****************************************************************************
301 Check for a valid username and password in security=domain mode.
302 ****************************************************************************/
304 static NTSTATUS
check_ntdomain_security(const struct auth_context
*auth_context
,
305 void *my_private_data
,
307 const auth_usersupplied_info
*user_info
,
308 auth_serversupplied_info
**server_info
)
310 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
311 const char *domain
= lp_workgroup();
313 struct sockaddr_storage dc_ss
;
315 if ( lp_server_role() != ROLE_DOMAIN_MEMBER
) {
316 DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
317 "ntdomain auth method when not a member of a domain.\n"));
318 return NT_STATUS_NOT_IMPLEMENTED
;
321 if (!user_info
|| !server_info
|| !auth_context
) {
322 DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
323 return NT_STATUS_INVALID_PARAMETER
;
327 * Check that the requested domain is not our own machine name.
328 * If it is, we should never check the PDC here, we use our own local
332 if(strequal(get_global_sam_name(), user_info
->domain
)) {
333 DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
334 return NT_STATUS_NOT_IMPLEMENTED
;
337 /* we need our DC to send the net_sam_logon() request to */
339 if ( !get_dc_name(domain
, NULL
, dc_name
, &dc_ss
) ) {
340 DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
342 return NT_STATUS_NO_LOGON_SERVERS
;
345 nt_status
= domain_client_validate(mem_ctx
,
348 (uchar
*)auth_context
->challenge
.data
,
356 /* module initialisation */
357 static NTSTATUS
auth_init_ntdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
359 if (!make_auth_methods(auth_context
, auth_method
)) {
360 return NT_STATUS_NO_MEMORY
;
363 (*auth_method
)->name
= "ntdomain";
364 (*auth_method
)->auth
= check_ntdomain_security
;
369 /****************************************************************************
370 Check for a valid username and password in a trusted domain
371 ****************************************************************************/
373 static NTSTATUS
check_trustdomain_security(const struct auth_context
*auth_context
,
374 void *my_private_data
,
376 const auth_usersupplied_info
*user_info
,
377 auth_serversupplied_info
**server_info
)
379 NTSTATUS nt_status
= NT_STATUS_LOGON_FAILURE
;
380 unsigned char trust_md4_password
[16];
381 char *trust_password
;
382 time_t last_change_time
;
385 struct sockaddr_storage dc_ss
;
387 if (!user_info
|| !server_info
|| !auth_context
) {
388 DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
389 return NT_STATUS_INVALID_PARAMETER
;
393 * Check that the requested domain is not our own machine name or domain name.
396 if( strequal(get_global_sam_name(), user_info
->domain
)) {
397 DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
399 return NT_STATUS_NOT_IMPLEMENTED
;
402 /* No point is bothering if this is not a trusted domain.
403 This return makes "map to guest = bad user" work again.
404 The logic is that if we know nothing about the domain, that
405 user is not known to us and does not exist */
407 if ( !is_trusted_domain( user_info
->domain
) )
408 return NT_STATUS_NOT_IMPLEMENTED
;
411 * Get the trusted account password for the trusted domain
412 * No need to become_root() as secrets_init() is done at startup.
415 if (!pdb_get_trusteddom_pw(user_info
->domain
, &trust_password
,
416 &sid
, &last_change_time
)) {
417 DEBUG(0, ("check_trustdomain_security: could not fetch trust "
418 "account password for domain %s\n",
420 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
423 #ifdef DEBUG_PASSWORD
424 DEBUG(100, ("Trust password for domain %s is %s\n", user_info
->domain
,
427 E_md4hash(trust_password
, trust_md4_password
);
428 SAFE_FREE(trust_password
);
431 /* Test if machine password is expired and need to be changed */
432 if (time(NULL
) > last_change_time
+ (time_t)lp_machine_password_timeout())
434 global_machine_password_needs_changing
= True
;
438 /* use get_dc_name() for consistency even through we know that it will be
441 if ( !get_dc_name(user_info
->domain
, NULL
, dc_name
, &dc_ss
) ) {
442 DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
444 return NT_STATUS_NO_LOGON_SERVERS
;
447 nt_status
= domain_client_validate(mem_ctx
,
450 (uchar
*)auth_context
->challenge
.data
,
458 /* module initialisation */
459 static NTSTATUS
auth_init_trustdomain(struct auth_context
*auth_context
, const char* param
, auth_methods
**auth_method
)
461 if (!make_auth_methods(auth_context
, auth_method
)) {
462 return NT_STATUS_NO_MEMORY
;
465 (*auth_method
)->name
= "trustdomain";
466 (*auth_method
)->auth
= check_trustdomain_security
;
470 NTSTATUS
auth_domain_init(void)
472 smb_register_auth(AUTH_INTERFACE_VERSION
, "trustdomain", auth_init_trustdomain
);
473 smb_register_auth(AUTH_INTERFACE_VERSION
, "ntdomain", auth_init_ntdomain
);