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/>.
24 #include "../libcli/auth/libcli_auth.h"
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 struct samr_Password lm_hash
, nt_hash
, client_lm_hash
, client_nt_hash
;
44 const char *username
= pdb_get_username(sampass
);
45 bool got_lm
= false, got_nt
= false;
47 *user_sess_key
= data_blob(NULL
, 0);
48 *lm_sess_key
= data_blob(NULL
, 0);
50 acct_ctrl
= pdb_get_acct_ctrl(sampass
);
51 if (acct_ctrl
& ACB_PWNOTREQ
) {
52 if (lp_null_passwords()) {
53 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username
));
56 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username
));
57 return NT_STATUS_LOGON_FAILURE
;
61 lm_pw
= pdb_get_lanman_passwd(sampass
);
62 nt_pw
= pdb_get_nt_passwd(sampass
);
64 memcpy(lm_hash
.hash
, lm_pw
, sizeof(lm_hash
.hash
));
67 memcpy(nt_hash
.hash
, nt_pw
, sizeof(nt_hash
.hash
));
69 if (user_info
->lm_interactive_pwd
.data
&& sizeof(client_lm_hash
.hash
) == user_info
->lm_interactive_pwd
.length
) {
70 memcpy(client_lm_hash
.hash
, user_info
->lm_interactive_pwd
.data
, sizeof(lm_hash
.hash
));
73 if (user_info
->nt_interactive_pwd
.data
&& sizeof(client_nt_hash
.hash
) == user_info
->nt_interactive_pwd
.length
) {
74 memcpy(client_nt_hash
.hash
, user_info
->nt_interactive_pwd
.data
, sizeof(nt_hash
.hash
));
77 if (got_lm
|| got_nt
) {
78 *user_sess_key
= data_blob(mem_ctx
, 16);
79 if (!user_sess_key
->data
) {
80 return NT_STATUS_NO_MEMORY
;
82 SMBsesskeygen_ntv1(nt_pw
, user_sess_key
->data
);
83 return hash_password_check(mem_ctx
, lp_lanman_auth(),
84 got_lm
? &client_lm_hash
: NULL
,
85 got_nt
? &client_nt_hash
: NULL
,
87 lm_pw
? &lm_hash
: NULL
,
88 nt_pw
? &nt_hash
: NULL
);
90 return ntlm_password_check(mem_ctx
, lp_lanman_auth(),
92 user_info
->logon_parameters
,
93 &auth_context
->challenge
,
94 &user_info
->lm_resp
, &user_info
->nt_resp
,
97 user_info
->client_domain
,
98 lm_pw
? &lm_hash
: NULL
,
99 nt_pw
? &nt_hash
: NULL
,
100 user_sess_key
, lm_sess_key
);
104 /****************************************************************************
105 Check if a user is allowed to logon at this time. Note this is the
106 servers local time, as logon hours are just specified as a weekly
108 ****************************************************************************/
110 static bool logon_hours_ok(struct samu
*sampass
)
112 /* In logon hours first bit is Sunday from 12AM to 1AM */
117 uint8 bitmask
, bitpos
;
119 hours
= pdb_get_hours(sampass
);
121 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass
)));
125 lasttime
= time(NULL
);
126 utctime
= gmtime(&lasttime
);
128 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
129 pdb_get_username(sampass
) ));
133 /* find the corresponding byte and bit */
134 bitpos
= (utctime
->tm_wday
* 24 + utctime
->tm_hour
) % 168;
135 bitmask
= 1 << (bitpos
% 8);
137 if (! (hours
[bitpos
/8] & bitmask
)) {
138 struct tm
*t
= localtime(&lasttime
);
140 asct
= "INVALID TIME";
144 asct
= "INVALID TIME";
148 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
149 "logon at this time (%s).\n",
150 pdb_get_username(sampass
), asct
));
154 asct
= asctime(utctime
);
155 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
156 pdb_get_username(sampass
), asct
? asct
: "UNKNOWN TIME" ));
161 /****************************************************************************
162 Do a specific test for a struct samu being valid for this connection
163 (ie not disabled, expired and the like).
164 ****************************************************************************/
166 static NTSTATUS
sam_account_ok(TALLOC_CTX
*mem_ctx
,
167 struct samu
*sampass
,
168 const auth_usersupplied_info
*user_info
)
170 uint32 acct_ctrl
= pdb_get_acct_ctrl(sampass
);
171 char *workstation_list
;
174 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass
)));
176 /* Quit if the account was disabled. */
177 if (acct_ctrl
& ACB_DISABLED
) {
178 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass
)));
179 return NT_STATUS_ACCOUNT_DISABLED
;
182 /* Quit if the account was locked out. */
183 if (acct_ctrl
& ACB_AUTOLOCK
) {
184 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass
)));
185 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
188 /* Quit if the account is not allowed to logon at this time. */
189 if (! logon_hours_ok(sampass
)) {
190 return NT_STATUS_INVALID_LOGON_HOURS
;
193 /* Test account expire time */
195 kickoff_time
= pdb_get_kickoff_time(sampass
);
196 if (kickoff_time
!= 0 && time(NULL
) > kickoff_time
) {
197 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass
)));
198 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time
));
199 return NT_STATUS_ACCOUNT_EXPIRED
;
202 if (!(pdb_get_acct_ctrl(sampass
) & ACB_PWNOEXP
) && !(pdb_get_acct_ctrl(sampass
) & ACB_PWNOTREQ
)) {
203 time_t must_change_time
= pdb_get_pass_must_change_time(sampass
);
204 time_t last_set_time
= pdb_get_pass_last_set_time(sampass
);
206 /* check for immediate expiry "must change at next logon"
207 * for a user account. */
208 if (((acct_ctrl
& (ACB_WSTRUST
|ACB_SVRTRUST
)) == 0) && (last_set_time
== 0)) {
209 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass
)));
210 return NT_STATUS_PASSWORD_MUST_CHANGE
;
213 /* check for expired password */
214 if (must_change_time
< time(NULL
) && must_change_time
!= 0) {
215 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass
)));
216 DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(talloc_tos(), must_change_time
), (long)must_change_time
));
217 return NT_STATUS_PASSWORD_EXPIRED
;
221 /* Test workstation. Workstation list is comma separated. */
223 workstation_list
= talloc_strdup(mem_ctx
, pdb_get_workstations(sampass
));
224 if (!workstation_list
)
225 return NT_STATUS_NO_MEMORY
;
227 if (*workstation_list
) {
228 bool invalid_ws
= True
;
230 const char *s
= workstation_list
;
232 const char *machine_name
= talloc_asprintf(mem_ctx
, "%s$", user_info
->wksta_name
);
233 if (machine_name
== NULL
)
234 return NT_STATUS_NO_MEMORY
;
236 while (next_token_talloc(mem_ctx
, &s
, &tok
, ",")) {
237 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
238 tok
, user_info
->wksta_name
));
239 if(strequal(tok
, user_info
->wksta_name
)) {
244 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
245 machine_name
, tok
+ 1));
246 if (user_in_group(machine_name
, tok
+ 1)) {
256 return NT_STATUS_INVALID_WORKSTATION
;
259 if (acct_ctrl
& ACB_DOMTRUST
) {
260 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass
)));
261 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT
;
264 if (acct_ctrl
& ACB_SVRTRUST
) {
265 if (!(user_info
->logon_parameters
& MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
)) {
266 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass
)));
267 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT
;
271 if (acct_ctrl
& ACB_WSTRUST
) {
272 if (!(user_info
->logon_parameters
& MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
)) {
273 DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass
)));
274 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT
;
280 /****************************************************************************
281 check if a username/password is OK assuming the password is a 24 byte
282 SMB hash supplied in the user_info structure
283 return an NT_STATUS constant.
284 ****************************************************************************/
286 static NTSTATUS
check_sam_security(const struct auth_context
*auth_context
,
287 void *my_private_data
,
289 const auth_usersupplied_info
*user_info
,
290 auth_serversupplied_info
**server_info
)
292 struct samu
*sampass
=NULL
;
295 NTSTATUS update_login_attempts_status
;
296 DATA_BLOB user_sess_key
= data_blob_null
;
297 DATA_BLOB lm_sess_key
= data_blob_null
;
298 bool updated_autolock
= False
, updated_badpw
= False
;
300 if (!user_info
|| !auth_context
) {
301 return NT_STATUS_UNSUCCESSFUL
;
304 /* the returned struct gets kept on the server_info, by means
305 of a steal further down */
307 if ( !(sampass
= samu_new( mem_ctx
)) ) {
308 return NT_STATUS_NO_MEMORY
;
311 /* get the account information */
314 ret
= pdb_getsampwnam(sampass
, user_info
->internal_username
);
318 DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
319 "passdb.\n", user_info
->internal_username
));
320 TALLOC_FREE(sampass
);
321 return NT_STATUS_NO_SUCH_USER
;
324 /* see if autolock flag needs to be updated */
325 if (pdb_get_acct_ctrl(sampass
) & ACB_NORMAL
)
326 pdb_update_autolock_flag(sampass
, &updated_autolock
);
327 /* Quit if the account was locked out. */
328 if (pdb_get_acct_ctrl(sampass
) & ACB_AUTOLOCK
) {
329 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass
)));
330 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
333 nt_status
= sam_password_ok(auth_context
, mem_ctx
, sampass
,
334 user_info
, &user_sess_key
, &lm_sess_key
);
336 /* Notify passdb backend of login success/failure. If not
337 NT_STATUS_OK the backend doesn't like the login */
339 update_login_attempts_status
= pdb_update_login_attempts(sampass
, NT_STATUS_IS_OK(nt_status
));
341 if (!NT_STATUS_IS_OK(nt_status
)) {
342 if (NT_STATUS_EQUAL(nt_status
,NT_STATUS_WRONG_PASSWORD
) &&
343 pdb_get_acct_ctrl(sampass
) &ACB_NORMAL
&&
344 NT_STATUS_IS_OK(update_login_attempts_status
))
346 pdb_increment_bad_password_count(sampass
);
347 updated_badpw
= True
;
349 pdb_update_bad_password_count(sampass
,
352 if (updated_autolock
|| updated_badpw
){
354 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass
)))
355 DEBUG(1, ("Failed to modify entry.\n"));
358 data_blob_free(&user_sess_key
);
359 data_blob_free(&lm_sess_key
);
360 TALLOC_FREE(sampass
);
364 if ((pdb_get_acct_ctrl(sampass
) & ACB_NORMAL
) &&
365 (pdb_get_bad_password_count(sampass
) > 0)){
366 pdb_set_bad_password_count(sampass
, 0, PDB_CHANGED
);
367 pdb_set_bad_password_time(sampass
, 0, PDB_CHANGED
);
368 updated_badpw
= True
;
371 if (updated_autolock
|| updated_badpw
){
373 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass
)))
374 DEBUG(1, ("Failed to modify entry.\n"));
378 nt_status
= sam_account_ok(mem_ctx
, sampass
, user_info
);
380 if (!NT_STATUS_IS_OK(nt_status
)) {
381 TALLOC_FREE(sampass
);
382 data_blob_free(&user_sess_key
);
383 data_blob_free(&lm_sess_key
);
388 nt_status
= make_server_info_sam(server_info
, sampass
);
391 if (!NT_STATUS_IS_OK(nt_status
)) {
392 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status
)));
393 data_blob_free(&user_sess_key
);
394 data_blob_free(&lm_sess_key
);
398 (*server_info
)->user_session_key
=
399 data_blob_talloc(*server_info
, user_sess_key
.data
,
400 user_sess_key
.length
);
401 data_blob_free(&user_sess_key
);
403 (*server_info
)->lm_session_key
=
404 data_blob_talloc(*server_info
, lm_sess_key
.data
,
406 data_blob_free(&lm_sess_key
);
408 (*server_info
)->nss_token
|= user_info
->was_mapped
;
413 /* module initialisation */
414 static NTSTATUS
auth_init_sam_ignoredomain(struct auth_context
*auth_context
, const char *param
, auth_methods
**auth_method
)
416 if (!make_auth_methods(auth_context
, auth_method
)) {
417 return NT_STATUS_NO_MEMORY
;
420 (*auth_method
)->auth
= check_sam_security
;
421 (*auth_method
)->name
= "sam_ignoredomain";
426 /****************************************************************************
427 Check SAM security (above) but with a few extra checks.
428 ****************************************************************************/
430 static NTSTATUS
check_samstrict_security(const struct auth_context
*auth_context
,
431 void *my_private_data
,
433 const auth_usersupplied_info
*user_info
,
434 auth_serversupplied_info
**server_info
)
436 bool is_local_name
, is_my_domain
;
438 if (!user_info
|| !auth_context
) {
439 return NT_STATUS_LOGON_FAILURE
;
442 is_local_name
= is_myname(user_info
->domain
);
443 is_my_domain
= strequal(user_info
->domain
, lp_workgroup());
445 /* check whether or not we service this domain/workgroup name */
447 switch ( lp_server_role() ) {
448 case ROLE_STANDALONE
:
449 case ROLE_DOMAIN_MEMBER
:
450 if ( !is_local_name
) {
451 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
452 user_info
->domain
, (lp_server_role() == ROLE_DOMAIN_MEMBER
453 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
454 return NT_STATUS_NOT_IMPLEMENTED
;
456 case ROLE_DOMAIN_PDC
:
457 case ROLE_DOMAIN_BDC
:
458 if ( !is_local_name
&& !is_my_domain
) {
459 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
461 return NT_STATUS_NOT_IMPLEMENTED
;
463 default: /* name is ok */
467 return check_sam_security(auth_context
, my_private_data
, mem_ctx
, user_info
, server_info
);
470 /* module initialisation */
471 static NTSTATUS
auth_init_sam(struct auth_context
*auth_context
, const char *param
, auth_methods
**auth_method
)
473 if (!make_auth_methods(auth_context
, auth_method
)) {
474 return NT_STATUS_NO_MEMORY
;
477 (*auth_method
)->auth
= check_samstrict_security
;
478 (*auth_method
)->name
= "sam";
482 NTSTATUS
auth_sam_init(void)
484 smb_register_auth(AUTH_INTERFACE_VERSION
, "sam", auth_init_sam
);
485 smb_register_auth(AUTH_INTERFACE_VERSION
, "sam_ignoredomain", auth_init_sam_ignoredomain
);