2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
5 Copyright (C) Gerald Carter 2003
6 Copyright (C) Stefan Metzmacher 2005
7 Copyright (C) Matthias Dieter Wallnöfer 2009
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 "system/time.h"
25 #include "auth/auth.h"
27 #include "../lib/util/util_ldb.h"
28 #include "dsdb/samdb/samdb.h"
29 #include "libcli/security/security.h"
30 #include "libcli/ldap/ldap.h"
31 #include "../libcli/ldap/ldap_ndr.h"
32 #include "librpc/gen_ndr/ndr_netlogon.h"
33 #include "librpc/gen_ndr/ndr_security.h"
34 #include "param/param.h"
35 #include "auth/auth_sam.h"
36 #include "dsdb/common/util.h"
38 #define KRBTGT_ATTRS \
39 /* required for the krb5 kdc */ \
42 "userPrincipalName", \
43 "servicePrincipalName", \
44 "msDS-KeyVersionNumber", \
45 "supplementalCredentials", \
51 "userAccountControl", \
57 const char *krbtgt_attrs
[] = {
61 const char *server_attrs
[] = {
65 const char *user_attrs
[] = {
70 /* check 'allowed workstations' */
73 /* required for server_info, not access control: */
89 /****************************************************************************
90 Check if a user is allowed to logon at this time. Note this is the
91 servers local time, as logon hours are just specified as a weekly
93 ****************************************************************************/
95 static bool logon_hours_ok(struct ldb_message
*msg
, const char *name_for_logs
)
97 /* In logon hours first bit is Sunday from 12AM to 1AM */
98 const struct ldb_val
*hours
;
102 uint8_t bitmask
, bitpos
;
104 hours
= ldb_msg_find_ldb_val(msg
, "logonHours");
106 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs
));
110 if (hours
->length
!= 168/8) {
111 DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs
));
115 lasttime
= time(NULL
);
116 utctime
= gmtime(&lasttime
);
118 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
123 /* find the corresponding byte and bit */
124 bitpos
= (utctime
->tm_wday
* 24 + utctime
->tm_hour
) % 168;
125 bitmask
= 1 << (bitpos
% 8);
127 if (! (hours
->data
[bitpos
/8] & bitmask
)) {
128 struct tm
*t
= localtime(&lasttime
);
130 asct
= "INVALID TIME";
134 asct
= "INVALID TIME";
138 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
139 "logon at this time (%s).\n",
140 name_for_logs
, asct
));
144 asct
= asctime(utctime
);
145 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
146 name_for_logs
, asct
? asct
: "UNKNOWN TIME" ));
151 /****************************************************************************
152 Do a specific test for a SAM_ACCOUNT being valid for this connection
153 (ie not disabled, expired and the like).
154 ****************************************************************************/
155 _PUBLIC_ NTSTATUS
authsam_account_ok(TALLOC_CTX
*mem_ctx
,
156 struct ldb_context
*sam_ctx
,
157 uint32_t logon_parameters
,
158 struct ldb_dn
*domain_dn
,
159 struct ldb_message
*msg
,
160 const char *logon_workstation
,
161 const char *name_for_logs
,
162 bool allow_domain_trust
,
163 bool password_change
)
166 const char *workstation_list
;
168 NTTIME must_change_time
;
171 DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs
));
173 acct_flags
= samdb_result_acct_flags(sam_ctx
, mem_ctx
, msg
, domain_dn
);
175 acct_expiry
= samdb_result_account_expires(msg
);
177 /* Check for when we must change this password, taking the
178 * userAccountControl flags into account */
179 must_change_time
= samdb_result_force_password_change(sam_ctx
, mem_ctx
,
182 workstation_list
= samdb_result_string(msg
, "userWorkstations", NULL
);
184 /* Quit if the account was disabled. */
185 if (acct_flags
& ACB_DISABLED
) {
186 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs
));
187 return NT_STATUS_ACCOUNT_DISABLED
;
190 /* Quit if the account was locked out. */
191 if (acct_flags
& ACB_AUTOLOCK
) {
192 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs
));
193 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
196 /* Test account expire time */
197 unix_to_nt_time(&now
, time(NULL
));
198 if (now
> acct_expiry
) {
199 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs
));
200 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
201 nt_time_string(mem_ctx
, acct_expiry
)));
202 return NT_STATUS_ACCOUNT_EXPIRED
;
205 /* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
206 if ((must_change_time
== 0) && !password_change
) {
207 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
209 return NT_STATUS_PASSWORD_MUST_CHANGE
;
212 /* check for expired password (but not if this is a password change request) */
213 if ((must_change_time
< now
) && !password_change
) {
214 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
216 DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
217 nt_time_string(mem_ctx
, must_change_time
)));
218 return NT_STATUS_PASSWORD_EXPIRED
;
221 /* Test workstation. Workstation list is comma separated. */
222 if (logon_workstation
&& workstation_list
&& *workstation_list
) {
223 bool invalid_ws
= true;
225 const char **workstations
= (const char **)str_list_make(mem_ctx
, workstation_list
, ",");
227 for (i
= 0; workstations
&& workstations
[i
]; i
++) {
228 DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
229 workstations
[i
], logon_workstation
));
231 if (strequal(workstations
[i
], logon_workstation
)) {
237 talloc_free(workstations
);
240 return NT_STATUS_INVALID_WORKSTATION
;
244 if (!logon_hours_ok(msg
, name_for_logs
)) {
245 return NT_STATUS_INVALID_LOGON_HOURS
;
248 if (!allow_domain_trust
) {
249 if (acct_flags
& ACB_DOMTRUST
) {
250 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs
));
251 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT
;
254 if (!(logon_parameters
& MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
)) {
255 if (acct_flags
& ACB_SVRTRUST
) {
256 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs
));
257 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT
;
260 if (!(logon_parameters
& MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
)) {
261 /* TODO: this fails with current solaris client. We
262 need to work with Gordon to work out why */
263 if (acct_flags
& ACB_WSTRUST
) {
264 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs
));
265 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT
;
272 /* This function tests if a SID structure "sids" contains the SID "sid" */
273 static bool sids_contains_sid(const struct dom_sid
**sids
,
274 const unsigned int num_sids
,
275 const struct dom_sid
*sid
)
279 for (i
= 0; i
< num_sids
; i
++) {
280 if (dom_sid_equal(sids
[i
], sid
))
288 * This function generates the transitive closure of a given SID "sid" (it
289 * basically expands nested groups of a SID).
290 * If the SID isn't located in the "res_sids" structure yet and the
291 * "only_childs" flag is negative, we add it to "res_sids".
292 * Then we've always to consider the "memberOf" attributes. We invoke the
293 * function recursively on each item of it with the "only_childs" flag set to
295 * The "only_childs" flag is particularly useful if you have a user SID and
296 * want to include all his groups (referenced with "memberOf") without his SID
299 * At the beginning "res_sids" should reference to a NULL pointer.
301 _PUBLIC_ NTSTATUS
authsam_expand_nested_groups(struct ldb_context
*sam_ctx
,
302 const struct dom_sid
*sid
, const bool only_childs
,
303 TALLOC_CTX
*res_sids_ctx
, struct dom_sid
***res_sids
,
304 unsigned int *num_res_sids
)
306 const char * const attrs
[] = { "memberOf", NULL
};
310 struct ldb_dn
*tmp_dn
;
311 struct dom_sid
*tmp_sid
;
313 struct ldb_message
**res
;
316 if (*res_sids
== NULL
) {
324 already_there
= sids_contains_sid((const struct dom_sid
**) *res_sids
,
331 tmp_sid
= dom_sid_dup(res_sids_ctx
, sid
);
332 NT_STATUS_HAVE_NO_MEMORY(tmp_sid
);
333 *res_sids
= talloc_realloc(res_sids_ctx
, *res_sids
,
334 struct dom_sid
*, *num_res_sids
+ 1);
335 NT_STATUS_HAVE_NO_MEMORY(*res_sids
);
336 (*res_sids
)[*num_res_sids
] = tmp_sid
;
340 tmp_ctx
= talloc_new(res_sids_ctx
);
342 ret
= gendb_search(sam_ctx
, tmp_ctx
, NULL
, &res
, attrs
,
343 "objectSid=%s", ldap_encode_ndr_dom_sid(tmp_ctx
, sid
));
345 talloc_free(tmp_ctx
);
346 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
349 if (res
[0]->num_elements
== 0) {
351 talloc_free(tmp_ctx
);
355 for (i
= 0; i
< res
[0]->elements
[0].num_values
; i
++) {
356 tmp_dn
= ldb_dn_from_ldb_val(tmp_ctx
, sam_ctx
,
357 &res
[0]->elements
[0].values
[i
]);
358 tmp_sid
= samdb_search_dom_sid(sam_ctx
, tmp_ctx
, tmp_dn
,
361 status
= authsam_expand_nested_groups(sam_ctx
, tmp_sid
,
362 false, res_sids_ctx
, res_sids
, num_res_sids
);
363 if (!NT_STATUS_IS_OK(status
)) {
365 talloc_free(tmp_ctx
);
371 talloc_free(tmp_ctx
);
376 _PUBLIC_ NTSTATUS
authsam_make_server_info(TALLOC_CTX
*mem_ctx
,
377 struct ldb_context
*sam_ctx
,
378 const char *netbios_name
,
379 const char *domain_name
,
380 struct ldb_dn
*domain_dn
,
381 struct ldb_message
*msg
,
382 DATA_BLOB user_sess_key
,
383 DATA_BLOB lm_sess_key
,
384 struct auth_serversupplied_info
**_server_info
)
387 struct auth_serversupplied_info
*server_info
;
389 struct dom_sid
*tmp_sid
;
390 /* SIDs for the account and his primary group */
391 struct dom_sid
*account_sid
;
392 struct dom_sid
*primary_group_sid
;
393 /* SID structures for the expanded group memberships */
394 struct dom_sid
**groupSIDs
= NULL
, **groupSIDs_2
= NULL
;
395 unsigned int num_groupSIDs
= 0, num_groupSIDs_2
= 0, i
;
396 uint32_t userAccountControl
;
398 server_info
= talloc(mem_ctx
, struct auth_serversupplied_info
);
399 NT_STATUS_HAVE_NO_MEMORY(server_info
);
401 account_sid
= samdb_result_dom_sid(server_info
, msg
, "objectSid");
402 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(account_sid
, server_info
);
404 primary_group_sid
= dom_sid_add_rid(server_info
,
405 samdb_domain_sid(sam_ctx
),
406 samdb_result_uint(msg
, "primaryGroupID", ~0));
407 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(primary_group_sid
, server_info
);
409 /* Expands the primary group */
410 status
= authsam_expand_nested_groups(sam_ctx
, primary_group_sid
, false,
411 server_info
, &groupSIDs
, &num_groupSIDs
);
412 if (!NT_STATUS_IS_OK(status
)) {
413 talloc_free(server_info
);
417 /* Expands the additional groups */
418 status
= authsam_expand_nested_groups(sam_ctx
, account_sid
, true,
419 server_info
, &groupSIDs_2
, &num_groupSIDs_2
);
420 if (!NT_STATUS_IS_OK(status
)) {
421 talloc_free(server_info
);
425 /* Merge the two expanded structures (groupSIDs, groupSIDs_2) */
426 for (i
= 0; i
< num_groupSIDs_2
; i
++)
427 if (!sids_contains_sid((const struct dom_sid
**) groupSIDs
,
428 num_groupSIDs
, groupSIDs_2
[i
])) {
429 tmp_sid
= dom_sid_dup(server_info
, groupSIDs_2
[i
]);
430 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(tmp_sid
, server_info
);
431 groupSIDs
= talloc_realloc(server_info
, groupSIDs
,
432 struct dom_sid
*, num_groupSIDs
+ 1);
433 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs
,
435 groupSIDs
[num_groupSIDs
] = tmp_sid
;
438 talloc_free(groupSIDs_2
);
440 server_info
->account_sid
= account_sid
;
441 server_info
->primary_group_sid
= primary_group_sid
;
443 /* DCs also get SID_NT_ENTERPRISE_DCS */
444 userAccountControl
= ldb_msg_find_attr_as_uint(msg
, "userAccountControl", 0);
445 if (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) {
446 groupSIDs
= talloc_realloc(server_info
, groupSIDs
, struct dom_sid
*,
448 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs
, server_info
);
449 groupSIDs
[num_groupSIDs
] = dom_sid_parse_talloc(groupSIDs
, SID_NT_ENTERPRISE_DCS
);
450 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs
[num_groupSIDs
], server_info
);
454 server_info
->domain_groups
= groupSIDs
;
455 server_info
->n_domain_groups
= num_groupSIDs
;
457 server_info
->account_name
= talloc_steal(server_info
,
458 samdb_result_string(msg
, "sAMAccountName", NULL
));
460 server_info
->domain_name
= talloc_strdup(server_info
, domain_name
);
461 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->domain_name
,
464 str
= samdb_result_string(msg
, "displayName", "");
465 server_info
->full_name
= talloc_strdup(server_info
, str
);
466 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->full_name
, server_info
);
468 str
= samdb_result_string(msg
, "scriptPath", "");
469 server_info
->logon_script
= talloc_strdup(server_info
, str
);
470 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->logon_script
,
473 str
= samdb_result_string(msg
, "profilePath", "");
474 server_info
->profile_path
= talloc_strdup(server_info
, str
);
475 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->profile_path
,
478 str
= samdb_result_string(msg
, "homeDirectory", "");
479 server_info
->home_directory
= talloc_strdup(server_info
, str
);
480 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->home_directory
,
483 str
= samdb_result_string(msg
, "homeDrive", "");
484 server_info
->home_drive
= talloc_strdup(server_info
, str
);
485 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->home_drive
, server_info
);
487 server_info
->logon_server
= talloc_strdup(server_info
, netbios_name
);
488 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->logon_server
,
491 server_info
->last_logon
= samdb_result_nttime(msg
, "lastLogon", 0);
492 server_info
->last_logoff
= samdb_result_last_logoff(msg
);
493 server_info
->acct_expiry
= samdb_result_account_expires(msg
);
494 server_info
->last_password_change
= samdb_result_nttime(msg
,
496 server_info
->allow_password_change
497 = samdb_result_allow_password_change(sam_ctx
, mem_ctx
,
498 domain_dn
, msg
, "pwdLastSet");
499 server_info
->force_password_change
500 = samdb_result_force_password_change(sam_ctx
, mem_ctx
,
502 server_info
->logon_count
= samdb_result_uint(msg
, "logonCount", 0);
503 server_info
->bad_password_count
= samdb_result_uint(msg
, "badPwdCount",
506 server_info
->acct_flags
= samdb_result_acct_flags(sam_ctx
, mem_ctx
,
509 server_info
->user_session_key
= data_blob_talloc(server_info
,
511 user_sess_key
.length
);
512 if (user_sess_key
.data
) {
513 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->user_session_key
.data
,
516 server_info
->lm_session_key
= data_blob_talloc(server_info
,
519 if (lm_sess_key
.data
) {
520 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->lm_session_key
.data
,
524 server_info
->authenticated
= true;
526 *_server_info
= server_info
;
531 NTSTATUS
sam_get_results_principal(struct ldb_context
*sam_ctx
,
532 TALLOC_CTX
*mem_ctx
, const char *principal
,
534 struct ldb_dn
**domain_dn
,
535 struct ldb_message
**msg
)
537 struct ldb_dn
*user_dn
;
539 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
543 return NT_STATUS_NO_MEMORY
;
546 nt_status
= crack_user_principal_name(sam_ctx
, tmp_ctx
, principal
,
547 &user_dn
, domain_dn
);
548 if (!NT_STATUS_IS_OK(nt_status
)) {
549 talloc_free(tmp_ctx
);
553 /* pull the user attributes */
554 ret
= dsdb_search_one(sam_ctx
, tmp_ctx
, msg
, user_dn
,
555 LDB_SCOPE_BASE
, attrs
, DSDB_SEARCH_SHOW_EXTENDED_DN
, "(objectClass=*)");
556 if (ret
!= LDB_SUCCESS
) {
557 talloc_free(tmp_ctx
);
558 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
560 talloc_steal(mem_ctx
, *msg
);
561 talloc_steal(mem_ctx
, *domain_dn
);
562 talloc_free(tmp_ctx
);