2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Tridgell 1992-2000
5 Copyright (C) Luke Kenneth Casson Leighton 1996-2000
6 Copyright (C) Andrew Bartlett 2001-2003
7 Copyright (C) Gerald Carter 2003
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #define DBGC_CLASS DBGC_AUTH
28 /****************************************************************************
29 Do a specific test for an smb password being correct, given a smb_password and
30 the lanman and NT responses.
31 ****************************************************************************/
33 static NTSTATUS
sam_password_ok(const struct auth_context
*auth_context
,
36 const auth_usersupplied_info
*user_info
,
37 DATA_BLOB
*user_sess_key
,
38 DATA_BLOB
*lm_sess_key
)
41 const uint8
*lm_pw
, *nt_pw
;
42 const char *username
= pdb_get_username(sampass
);
44 acct_ctrl
= pdb_get_acct_ctrl(sampass
);
45 if (acct_ctrl
& ACB_PWNOTREQ
) {
46 if (lp_null_passwords()) {
47 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username
));
50 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username
));
51 return NT_STATUS_LOGON_FAILURE
;
55 lm_pw
= pdb_get_lanman_passwd(sampass
);
56 nt_pw
= pdb_get_nt_passwd(sampass
);
58 return ntlm_password_check(mem_ctx
, &auth_context
->challenge
,
59 &user_info
->lm_resp
, &user_info
->nt_resp
,
60 &user_info
->lm_interactive_pwd
, &user_info
->nt_interactive_pwd
,
63 user_info
->client_domain
,
64 lm_pw
, nt_pw
, user_sess_key
, lm_sess_key
);
67 /****************************************************************************
68 Check if a user is allowed to logon at this time. Note this is the
69 servers local time, as logon hours are just specified as a weekly
71 ****************************************************************************/
73 static bool logon_hours_ok(struct samu
*sampass
)
75 /* In logon hours first bit is Sunday from 12AM to 1AM */
80 uint8 bitmask
, bitpos
;
82 hours
= pdb_get_hours(sampass
);
84 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass
)));
88 lasttime
= time(NULL
);
89 utctime
= gmtime(&lasttime
);
91 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
92 pdb_get_username(sampass
) ));
96 /* find the corresponding byte and bit */
97 bitpos
= (utctime
->tm_wday
* 24 + utctime
->tm_hour
) % 168;
98 bitmask
= 1 << (bitpos
% 8);
100 if (! (hours
[bitpos
/8] & bitmask
)) {
101 struct tm
*t
= localtime(&lasttime
);
103 asct
= "INVALID TIME";
107 asct
= "INVALID TIME";
111 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
112 "logon at this time (%s).\n",
113 pdb_get_username(sampass
), asct
));
117 asct
= asctime(utctime
);
118 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
119 pdb_get_username(sampass
), asct
? asct
: "UNKNOWN TIME" ));
124 /****************************************************************************
125 Do a specific test for a struct samu being valid for this connection
126 (ie not disabled, expired and the like).
127 ****************************************************************************/
129 static NTSTATUS
sam_account_ok(TALLOC_CTX
*mem_ctx
,
130 struct samu
*sampass
,
131 const auth_usersupplied_info
*user_info
)
133 uint32 acct_ctrl
= pdb_get_acct_ctrl(sampass
);
134 char *workstation_list
;
137 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass
)));
139 /* Quit if the account was disabled. */
140 if (acct_ctrl
& ACB_DISABLED
) {
141 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass
)));
142 return NT_STATUS_ACCOUNT_DISABLED
;
145 /* Quit if the account was locked out. */
146 if (acct_ctrl
& ACB_AUTOLOCK
) {
147 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass
)));
148 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
151 /* Quit if the account is not allowed to logon at this time. */
152 if (! logon_hours_ok(sampass
)) {
153 return NT_STATUS_INVALID_LOGON_HOURS
;
156 /* Test account expire time */
158 kickoff_time
= pdb_get_kickoff_time(sampass
);
159 if (kickoff_time
!= 0 && time(NULL
) > kickoff_time
) {
160 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass
)));
161 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time
));
162 return NT_STATUS_ACCOUNT_EXPIRED
;
165 if (!(pdb_get_acct_ctrl(sampass
) & ACB_PWNOEXP
) && !(pdb_get_acct_ctrl(sampass
) & ACB_PWNOTREQ
)) {
166 time_t must_change_time
= pdb_get_pass_must_change_time(sampass
);
167 time_t last_set_time
= pdb_get_pass_last_set_time(sampass
);
169 /* check for immediate expiry "must change at next logon" */
170 if (last_set_time
== 0) {
171 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass
)));
172 return NT_STATUS_PASSWORD_MUST_CHANGE
;
175 /* check for expired password */
176 if (must_change_time
< time(NULL
) && must_change_time
!= 0) {
177 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass
)));
178 DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time
), (long)must_change_time
));
179 return NT_STATUS_PASSWORD_EXPIRED
;
183 /* Test workstation. Workstation list is comma separated. */
185 workstation_list
= talloc_strdup(mem_ctx
, pdb_get_workstations(sampass
));
186 if (!workstation_list
)
187 return NT_STATUS_NO_MEMORY
;
189 if (*workstation_list
) {
190 bool invalid_ws
= True
;
192 const char *s
= workstation_list
;
194 const char *machine_name
= talloc_asprintf(mem_ctx
, "%s$", user_info
->wksta_name
);
195 if (machine_name
== NULL
)
196 return NT_STATUS_NO_MEMORY
;
198 while (next_token_talloc(mem_ctx
, &s
, &tok
, ",")) {
199 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
200 tok
, user_info
->wksta_name
));
201 if(strequal(tok
, user_info
->wksta_name
)) {
206 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
207 machine_name
, tok
+ 1));
208 if (user_in_group(machine_name
, tok
+ 1)) {
218 return NT_STATUS_INVALID_WORKSTATION
;
221 if (acct_ctrl
& ACB_DOMTRUST
) {
222 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass
)));
223 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT
;
226 if (acct_ctrl
& ACB_SVRTRUST
) {
227 if (!(user_info
->logon_parameters
& MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
)) {
228 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass
)));
229 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT
;
233 if (acct_ctrl
& ACB_WSTRUST
) {
234 if (!(user_info
->logon_parameters
& MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
)) {
235 DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass
)));
236 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT
;
242 /****************************************************************************
243 check if a username/password is OK assuming the password is a 24 byte
244 SMB hash supplied in the user_info structure
245 return an NT_STATUS constant.
246 ****************************************************************************/
248 static NTSTATUS
check_sam_security(const struct auth_context
*auth_context
,
249 void *my_private_data
,
251 const auth_usersupplied_info
*user_info
,
252 auth_serversupplied_info
**server_info
)
254 struct samu
*sampass
=NULL
;
257 NTSTATUS update_login_attempts_status
;
258 DATA_BLOB user_sess_key
= data_blob_null
;
259 DATA_BLOB lm_sess_key
= data_blob_null
;
260 bool updated_autolock
= False
, updated_badpw
= False
;
262 if (!user_info
|| !auth_context
) {
263 return NT_STATUS_UNSUCCESSFUL
;
266 /* the returned struct gets kept on the server_info, by means
267 of a steal further down */
269 if ( !(sampass
= samu_new( mem_ctx
)) ) {
270 return NT_STATUS_NO_MEMORY
;
273 /* get the account information */
276 ret
= pdb_getsampwnam(sampass
, user_info
->internal_username
);
280 DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
281 "passdb.\n", user_info
->internal_username
));
282 TALLOC_FREE(sampass
);
283 return NT_STATUS_NO_SUCH_USER
;
286 /* see if autolock flag needs to be updated */
287 if (pdb_get_acct_ctrl(sampass
) & ACB_NORMAL
)
288 pdb_update_autolock_flag(sampass
, &updated_autolock
);
289 /* Quit if the account was locked out. */
290 if (pdb_get_acct_ctrl(sampass
) & ACB_AUTOLOCK
) {
291 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass
)));
292 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
295 nt_status
= sam_password_ok(auth_context
, mem_ctx
, sampass
,
296 user_info
, &user_sess_key
, &lm_sess_key
);
298 /* Notify passdb backend of login success/failure. If not
299 NT_STATUS_OK the backend doesn't like the login */
301 update_login_attempts_status
= pdb_update_login_attempts(sampass
, NT_STATUS_IS_OK(nt_status
));
303 if (!NT_STATUS_IS_OK(nt_status
)) {
304 if (NT_STATUS_EQUAL(nt_status
,NT_STATUS_WRONG_PASSWORD
) &&
305 pdb_get_acct_ctrl(sampass
) &ACB_NORMAL
&&
306 NT_STATUS_IS_OK(update_login_attempts_status
))
308 pdb_increment_bad_password_count(sampass
);
309 updated_badpw
= True
;
311 pdb_update_bad_password_count(sampass
,
314 if (updated_autolock
|| updated_badpw
){
316 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass
)))
317 DEBUG(1, ("Failed to modify entry.\n"));
320 data_blob_free(&user_sess_key
);
321 data_blob_free(&lm_sess_key
);
322 TALLOC_FREE(sampass
);
326 if ((pdb_get_acct_ctrl(sampass
) & ACB_NORMAL
) &&
327 (pdb_get_bad_password_count(sampass
) > 0)){
328 pdb_set_bad_password_count(sampass
, 0, PDB_CHANGED
);
329 pdb_set_bad_password_time(sampass
, 0, PDB_CHANGED
);
330 updated_badpw
= True
;
333 if (updated_autolock
|| updated_badpw
){
335 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass
)))
336 DEBUG(1, ("Failed to modify entry.\n"));
340 nt_status
= sam_account_ok(mem_ctx
, sampass
, user_info
);
342 if (!NT_STATUS_IS_OK(nt_status
)) {
343 TALLOC_FREE(sampass
);
344 data_blob_free(&user_sess_key
);
345 data_blob_free(&lm_sess_key
);
350 nt_status
= make_server_info_sam(server_info
, sampass
);
353 if (!NT_STATUS_IS_OK(nt_status
)) {
354 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status
)));
355 data_blob_free(&user_sess_key
);
356 data_blob_free(&lm_sess_key
);
360 (*server_info
)->user_session_key
=
361 data_blob_talloc(*server_info
, user_sess_key
.data
,
362 user_sess_key
.length
);
363 data_blob_free(&user_sess_key
);
365 (*server_info
)->lm_session_key
=
366 data_blob_talloc(*server_info
, lm_sess_key
.data
,
368 data_blob_free(&lm_sess_key
);
370 (*server_info
)->nss_token
|= user_info
->was_mapped
;
375 /* module initialisation */
376 static NTSTATUS
auth_init_sam_ignoredomain(struct auth_context
*auth_context
, const char *param
, auth_methods
**auth_method
)
378 if (!make_auth_methods(auth_context
, auth_method
)) {
379 return NT_STATUS_NO_MEMORY
;
382 (*auth_method
)->auth
= check_sam_security
;
383 (*auth_method
)->name
= "sam_ignoredomain";
388 /****************************************************************************
389 Check SAM security (above) but with a few extra checks.
390 ****************************************************************************/
392 static NTSTATUS
check_samstrict_security(const struct auth_context
*auth_context
,
393 void *my_private_data
,
395 const auth_usersupplied_info
*user_info
,
396 auth_serversupplied_info
**server_info
)
398 bool is_local_name
, is_my_domain
;
400 if (!user_info
|| !auth_context
) {
401 return NT_STATUS_LOGON_FAILURE
;
404 is_local_name
= is_myname(user_info
->domain
);
405 is_my_domain
= strequal(user_info
->domain
, lp_workgroup());
407 /* check whether or not we service this domain/workgroup name */
409 switch ( lp_server_role() ) {
410 case ROLE_STANDALONE
:
411 case ROLE_DOMAIN_MEMBER
:
412 if ( !is_local_name
) {
413 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
414 user_info
->domain
, (lp_server_role() == ROLE_DOMAIN_MEMBER
415 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
416 return NT_STATUS_NOT_IMPLEMENTED
;
418 case ROLE_DOMAIN_PDC
:
419 case ROLE_DOMAIN_BDC
:
420 if ( !is_local_name
&& !is_my_domain
) {
421 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
423 return NT_STATUS_NOT_IMPLEMENTED
;
425 default: /* name is ok */
429 return check_sam_security(auth_context
, my_private_data
, mem_ctx
, user_info
, server_info
);
432 /* module initialisation */
433 static NTSTATUS
auth_init_sam(struct auth_context
*auth_context
, const char *param
, auth_methods
**auth_method
)
435 if (!make_auth_methods(auth_context
, auth_method
)) {
436 return NT_STATUS_NO_MEMORY
;
439 (*auth_method
)->auth
= check_samstrict_security
;
440 (*auth_method
)->name
= "sam";
444 NTSTATUS
auth_sam_init(void)
446 smb_register_auth(AUTH_INTERFACE_VERSION
, "sam", auth_init_sam
);
447 smb_register_auth(AUTH_INTERFACE_VERSION
, "sam_ignoredomain", auth_init_sam_ignoredomain
);