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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #define DBGC_CLASS DBGC_AUTH
29 /****************************************************************************
30 Do a specific test for an smb password being correct, given a smb_password and
31 the lanman and NT responses.
32 ****************************************************************************/
34 static NTSTATUS
sam_password_ok(const struct auth_context
*auth_context
,
37 const auth_usersupplied_info
*user_info
,
38 DATA_BLOB
*user_sess_key
,
39 DATA_BLOB
*lm_sess_key
)
42 const uint8
*lm_pw
, *nt_pw
;
43 const char *username
= pdb_get_username(sampass
);
45 acct_ctrl
= pdb_get_acct_ctrl(sampass
);
46 if (acct_ctrl
& ACB_PWNOTREQ
) {
47 if (lp_null_passwords()) {
48 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username
));
51 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username
));
52 return NT_STATUS_LOGON_FAILURE
;
56 lm_pw
= pdb_get_lanman_passwd(sampass
);
57 nt_pw
= pdb_get_nt_passwd(sampass
);
59 return ntlm_password_check(mem_ctx
, &auth_context
->challenge
,
60 &user_info
->lm_resp
, &user_info
->nt_resp
,
61 &user_info
->lm_interactive_pwd
, &user_info
->nt_interactive_pwd
,
63 user_info
->smb_name
.str
,
64 user_info
->client_domain
.str
,
65 lm_pw
, nt_pw
, user_sess_key
, lm_sess_key
);
68 /****************************************************************************
69 Check if a user is allowed to logon at this time. Note this is the
70 servers local time, as logon hours are just specified as a weekly
72 ****************************************************************************/
74 static BOOL
logon_hours_ok(SAM_ACCOUNT
*sampass
)
76 /* In logon hours first bit is Sunday from 12AM to 1AM */
77 extern struct timeval smb_last_time
;
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 utctime
= localtime(&smb_last_time
.tv_sec
);
90 /* find the corresponding byte and bit */
91 bitpos
= (utctime
->tm_wday
* 24 + utctime
->tm_hour
) % 168;
92 bitmask
= 1 << (bitpos
% 8);
94 if (! (hours
[bitpos
/8] & bitmask
)) {
95 DEBUG(1,("logon_hours_ok: Account for user %s not allowed to logon at this time (%s).\n",
96 pdb_get_username(sampass
), asctime(utctime
) ));
100 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
101 pdb_get_username(sampass
), asctime(utctime
) ));
106 /****************************************************************************
107 Do a specific test for a SAM_ACCOUNT being vaild for this connection
108 (ie not disabled, expired and the like).
109 ****************************************************************************/
111 static NTSTATUS
sam_account_ok(TALLOC_CTX
*mem_ctx
,
112 SAM_ACCOUNT
*sampass
,
113 const auth_usersupplied_info
*user_info
)
115 uint16 acct_ctrl
= pdb_get_acct_ctrl(sampass
);
116 char *workstation_list
;
119 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass
)));
121 /* Quit if the account was disabled. */
122 if (acct_ctrl
& ACB_DISABLED
) {
123 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass
)));
124 return NT_STATUS_ACCOUNT_DISABLED
;
127 /* Quit if the account was locked out. */
128 if (acct_ctrl
& ACB_AUTOLOCK
) {
129 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass
)));
130 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
133 /* Quit if the account is not allowed to logon at this time. */
134 if (! logon_hours_ok(sampass
)) {
135 return NT_STATUS_INVALID_LOGON_HOURS
;
138 /* Test account expire time */
140 kickoff_time
= pdb_get_kickoff_time(sampass
);
141 if (kickoff_time
!= 0 && time(NULL
) > kickoff_time
) {
142 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass
)));
143 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time
));
144 return NT_STATUS_ACCOUNT_EXPIRED
;
147 if (!(pdb_get_acct_ctrl(sampass
) & ACB_PWNOEXP
)) {
148 time_t must_change_time
= pdb_get_pass_must_change_time(sampass
);
149 time_t last_set_time
= pdb_get_pass_last_set_time(sampass
);
151 /* check for immediate expiry "must change at next logon" */
152 if (must_change_time
== 0 && last_set_time
!= 0) {
153 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass
)));
154 return NT_STATUS_PASSWORD_MUST_CHANGE
;
157 /* check for expired password */
158 if (must_change_time
< time(NULL
) && must_change_time
!= 0) {
159 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass
)));
160 DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time
), (long)must_change_time
));
161 return NT_STATUS_PASSWORD_EXPIRED
;
165 /* Test workstation. Workstation list is comma separated. */
167 workstation_list
= talloc_strdup(mem_ctx
, pdb_get_workstations(sampass
));
168 if (!workstation_list
)
169 return NT_STATUS_NO_MEMORY
;
171 if (*workstation_list
) {
172 BOOL invalid_ws
= True
;
174 const char *s
= workstation_list
;
176 const char *machine_name
= talloc_asprintf(mem_ctx
, "%s$", user_info
->wksta_name
.str
);
177 if (machine_name
== NULL
)
178 return NT_STATUS_NO_MEMORY
;
181 while (next_token(&s
, tok
, ",", sizeof(tok
))) {
182 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
183 tok
, user_info
->wksta_name
.str
, user_info
->wksta_name
.len
));
184 if(strequal(tok
, user_info
->wksta_name
.str
)) {
189 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
190 machine_name
, tok
+ 1));
191 if (user_in_group_list(machine_name
, tok
+ 1, NULL
, 0)) {
199 return NT_STATUS_INVALID_WORKSTATION
;
202 if (acct_ctrl
& ACB_DOMTRUST
) {
203 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass
)));
204 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT
;
207 if (acct_ctrl
& ACB_SVRTRUST
) {
208 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass
)));
209 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT
;
212 if (acct_ctrl
& ACB_WSTRUST
) {
213 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass
)));
214 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT
;
220 /****************************************************************************
221 check if a username/password is OK assuming the password is a 24 byte
222 SMB hash supplied in the user_info structure
223 return an NT_STATUS constant.
224 ****************************************************************************/
226 static NTSTATUS
check_sam_security(const struct auth_context
*auth_context
,
227 void *my_private_data
,
229 const auth_usersupplied_info
*user_info
,
230 auth_serversupplied_info
**server_info
)
232 SAM_ACCOUNT
*sampass
=NULL
;
235 DATA_BLOB user_sess_key
= data_blob(NULL
, 0);
236 DATA_BLOB lm_sess_key
= data_blob(NULL
, 0);
237 BOOL updated_autolock
= False
, updated_badpw
= False
;
239 if (!user_info
|| !auth_context
) {
240 return NT_STATUS_UNSUCCESSFUL
;
243 /* Can't use the talloc version here, because the returned struct gets
244 kept on the server_info */
245 if (!NT_STATUS_IS_OK(nt_status
= pdb_init_sam(&sampass
))) {
249 /* get the account information */
252 ret
= pdb_getsampwnam(sampass
, user_info
->internal_username
.str
);
256 DEBUG(3,("check_sam_security: Couldn't find user '%s' in passdb.\n", user_info
->internal_username
.str
));
257 pdb_free_sam(&sampass
);
258 return NT_STATUS_NO_SUCH_USER
;
261 /* see if autolock flag needs to be updated */
262 if (pdb_get_acct_ctrl(sampass
) & ACB_NORMAL
)
263 pdb_update_autolock_flag(sampass
, &updated_autolock
);
264 /* Quit if the account was locked out. */
265 if (pdb_get_acct_ctrl(sampass
) & ACB_AUTOLOCK
) {
266 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass
)));
267 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
270 nt_status
= sam_password_ok(auth_context
, mem_ctx
, sampass
,
271 user_info
, &user_sess_key
, &lm_sess_key
);
273 if (!NT_STATUS_IS_OK(nt_status
)) {
274 if (NT_STATUS_EQUAL(nt_status
,NT_STATUS_WRONG_PASSWORD
) &&
275 pdb_get_acct_ctrl(sampass
) &ACB_NORMAL
) {
276 pdb_increment_bad_password_count(sampass
);
277 updated_badpw
= True
;
279 pdb_update_bad_password_count(sampass
,
282 if (updated_autolock
|| updated_badpw
){
284 if(!pdb_update_sam_account(sampass
))
285 DEBUG(1, ("Failed to modify entry.\n"));
288 data_blob_free(&user_sess_key
);
289 data_blob_free(&lm_sess_key
);
290 pdb_free_sam(&sampass
);
294 if ((pdb_get_acct_ctrl(sampass
) & ACB_NORMAL
) &&
295 (pdb_get_bad_password_count(sampass
) > 0)){
296 pdb_set_bad_password_count(sampass
, 0, PDB_CHANGED
);
297 pdb_set_bad_password_time(sampass
, 0, PDB_CHANGED
);
298 updated_badpw
= True
;
301 if (updated_autolock
|| updated_badpw
){
303 if(!pdb_update_sam_account(sampass
))
304 DEBUG(1, ("Failed to modify entry.\n"));
308 nt_status
= sam_account_ok(mem_ctx
, sampass
, user_info
);
310 if (!NT_STATUS_IS_OK(nt_status
)) {
311 pdb_free_sam(&sampass
);
312 data_blob_free(&user_sess_key
);
313 data_blob_free(&lm_sess_key
);
317 if (!NT_STATUS_IS_OK(nt_status
= make_server_info_sam(server_info
, sampass
))) {
318 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status
)));
319 data_blob_free(&user_sess_key
);
320 data_blob_free(&lm_sess_key
);
324 (*server_info
)->user_session_key
= user_sess_key
;
325 (*server_info
)->lm_session_key
= lm_sess_key
;
330 /* module initialisation */
331 static NTSTATUS
auth_init_sam_ignoredomain(struct auth_context
*auth_context
, const char *param
, auth_methods
**auth_method
)
333 if (!make_auth_methods(auth_context
, auth_method
)) {
334 return NT_STATUS_NO_MEMORY
;
337 (*auth_method
)->auth
= check_sam_security
;
338 (*auth_method
)->name
= "sam_ignoredomain";
343 /****************************************************************************
344 Check SAM security (above) but with a few extra checks.
345 ****************************************************************************/
347 static NTSTATUS
check_samstrict_security(const struct auth_context
*auth_context
,
348 void *my_private_data
,
350 const auth_usersupplied_info
*user_info
,
351 auth_serversupplied_info
**server_info
)
353 BOOL is_local_name
, is_my_domain
;
355 if (!user_info
|| !auth_context
) {
356 return NT_STATUS_LOGON_FAILURE
;
359 is_local_name
= is_myname(user_info
->domain
.str
);
360 is_my_domain
= strequal(user_info
->domain
.str
, lp_workgroup());
362 /* check whether or not we service this domain/workgroup name */
364 switch ( lp_server_role() ) {
365 case ROLE_STANDALONE
:
366 case ROLE_DOMAIN_MEMBER
:
367 if ( !is_local_name
) {
368 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
369 user_info
->domain
.str
, (lp_server_role() == ROLE_DOMAIN_MEMBER
370 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
371 return NT_STATUS_NOT_IMPLEMENTED
;
373 case ROLE_DOMAIN_PDC
:
374 case ROLE_DOMAIN_BDC
:
375 if ( !is_local_name
&& !is_my_domain
) {
376 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
377 user_info
->domain
.str
));
378 return NT_STATUS_NOT_IMPLEMENTED
;
380 default: /* name is ok */
384 return check_sam_security(auth_context
, my_private_data
, mem_ctx
, user_info
, server_info
);
387 /* module initialisation */
388 static NTSTATUS
auth_init_sam(struct auth_context
*auth_context
, const char *param
, auth_methods
**auth_method
)
390 if (!make_auth_methods(auth_context
, auth_method
)) {
391 return NT_STATUS_NO_MEMORY
;
394 (*auth_method
)->auth
= check_samstrict_security
;
395 (*auth_method
)->name
= "sam";
399 NTSTATUS
auth_sam_init(void)
401 smb_register_auth(AUTH_INTERFACE_VERSION
, "sam", auth_init_sam
);
402 smb_register_auth(AUTH_INTERFACE_VERSION
, "sam_ignoredomain", auth_init_sam_ignoredomain
);