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"
37 #define KRBTGT_ATTRS \
38 /* required for the krb5 kdc */ \
41 "userPrincipalName", \
42 "servicePrincipalName", \
43 "msDS-KeyVersionNumber", \
44 "supplementalCredentials", \
50 "userAccountControl", \
56 const char *krbtgt_attrs
[] = {
60 const char *server_attrs
[] = {
64 const char *user_attrs
[] = {
69 /* check 'allowed workstations' */
72 /* required for server_info, not access control: */
88 /****************************************************************************
89 Check if a user is allowed to logon at this time. Note this is the
90 servers local time, as logon hours are just specified as a weekly
92 ****************************************************************************/
94 static bool logon_hours_ok(struct ldb_message
*msg
, const char *name_for_logs
)
96 /* In logon hours first bit is Sunday from 12AM to 1AM */
97 const struct ldb_val
*hours
;
101 uint8_t bitmask
, bitpos
;
103 hours
= ldb_msg_find_ldb_val(msg
, "logonHours");
105 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs
));
109 if (hours
->length
!= 168/8) {
110 DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs
));
114 lasttime
= time(NULL
);
115 utctime
= gmtime(&lasttime
);
117 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
122 /* find the corresponding byte and bit */
123 bitpos
= (utctime
->tm_wday
* 24 + utctime
->tm_hour
) % 168;
124 bitmask
= 1 << (bitpos
% 8);
126 if (! (hours
->data
[bitpos
/8] & bitmask
)) {
127 struct tm
*t
= localtime(&lasttime
);
129 asct
= "INVALID TIME";
133 asct
= "INVALID TIME";
137 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
138 "logon at this time (%s).\n",
139 name_for_logs
, asct
));
143 asct
= asctime(utctime
);
144 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
145 name_for_logs
, asct
? asct
: "UNKNOWN TIME" ));
150 /****************************************************************************
151 Do a specific test for a SAM_ACCOUNT being vaild for this connection
152 (ie not disabled, expired and the like).
153 ****************************************************************************/
154 _PUBLIC_ NTSTATUS
authsam_account_ok(TALLOC_CTX
*mem_ctx
,
155 struct ldb_context
*sam_ctx
,
156 uint32_t logon_parameters
,
157 struct ldb_dn
*domain_dn
,
158 struct ldb_message
*msg
,
159 const char *logon_workstation
,
160 const char *name_for_logs
,
161 bool allow_domain_trust
,
162 bool password_change
)
165 const char *workstation_list
;
167 NTTIME must_change_time
;
170 DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs
));
172 acct_flags
= samdb_result_acct_flags(sam_ctx
, mem_ctx
, msg
, domain_dn
);
174 acct_expiry
= samdb_result_account_expires(msg
);
176 /* Check for when we must change this password, taking the
177 * userAccountControl flags into account */
178 must_change_time
= samdb_result_force_password_change(sam_ctx
, mem_ctx
,
181 workstation_list
= samdb_result_string(msg
, "userWorkstations", NULL
);
183 /* Quit if the account was disabled. */
184 if (acct_flags
& ACB_DISABLED
) {
185 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs
));
186 return NT_STATUS_ACCOUNT_DISABLED
;
189 /* Quit if the account was locked out. */
190 if (acct_flags
& ACB_AUTOLOCK
) {
191 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs
));
192 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
195 /* Test account expire time */
196 unix_to_nt_time(&now
, time(NULL
));
197 if (now
> acct_expiry
) {
198 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs
));
199 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
200 nt_time_string(mem_ctx
, acct_expiry
)));
201 return NT_STATUS_ACCOUNT_EXPIRED
;
204 /* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
205 if ((must_change_time
== 0) && !password_change
) {
206 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
208 return NT_STATUS_PASSWORD_MUST_CHANGE
;
211 /* check for expired password (but not if this is a password change request) */
212 if ((must_change_time
< now
) && !password_change
) {
213 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
215 DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
216 nt_time_string(mem_ctx
, must_change_time
)));
217 return NT_STATUS_PASSWORD_EXPIRED
;
220 /* Test workstation. Workstation list is comma separated. */
221 if (logon_workstation
&& workstation_list
&& *workstation_list
) {
222 bool invalid_ws
= true;
224 const char **workstations
= (const char **)str_list_make(mem_ctx
, workstation_list
, ",");
226 for (i
= 0; workstations
&& workstations
[i
]; i
++) {
227 DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
228 workstations
[i
], logon_workstation
));
230 if (strequal(workstations
[i
], logon_workstation
)) {
236 talloc_free(workstations
);
239 return NT_STATUS_INVALID_WORKSTATION
;
243 if (!logon_hours_ok(msg
, name_for_logs
)) {
244 return NT_STATUS_INVALID_LOGON_HOURS
;
247 if (!allow_domain_trust
) {
248 if (acct_flags
& ACB_DOMTRUST
) {
249 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs
));
250 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT
;
253 if (!(logon_parameters
& MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
)) {
254 if (acct_flags
& ACB_SVRTRUST
) {
255 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs
));
256 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT
;
259 if (!(logon_parameters
& MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
)) {
260 /* TODO: this fails with current solaris client. We
261 need to work with Gordon to work out why */
262 if (acct_flags
& ACB_WSTRUST
) {
263 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs
));
264 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT
;
271 /* This function tests if a SID structure "sids" contains the SID "sid" */
272 static bool sids_contains_sid(const struct dom_sid
**sids
, const int num_sids
,
273 const struct dom_sid
*sid
)
277 for (i
= 0; i
< num_sids
; i
++) {
278 if (dom_sid_equal(sids
[i
], sid
))
285 * This function generates the transitive closure of a given SID "sid" (it
286 * basically expands nested groups of a SID).
287 * If the SID isn't located in the "res_sids" structure yet and the
288 * "only_childs" flag is negative, we add it to "res_sids".
289 * Then we've always to consider the "memberOf" attributes. We invoke the
290 * function recursively on each item of it with the "only_childs" flag set to
292 * The "only_childs" flag is particularly useful if you have a user SID and
293 * want to include all his groups (referenced with "memberOf") without his SID
296 * At the beginning "res_sids" should reference to a NULL pointer.
298 static NTSTATUS
authsam_expand_nested_groups(struct ldb_context
*sam_ctx
,
299 const struct dom_sid
*sid
, const bool only_childs
,
300 TALLOC_CTX
*res_sids_ctx
, struct dom_sid
***res_sids
,
303 const char * const attrs
[] = { "memberOf", NULL
};
306 struct ldb_dn
*tmp_dn
;
307 struct dom_sid
*tmp_sid
;
309 struct ldb_message
**res
;
312 if (*res_sids
== NULL
) {
320 already_there
= sids_contains_sid((const struct dom_sid
**) *res_sids
,
327 tmp_sid
= dom_sid_dup(res_sids_ctx
, sid
);
328 NT_STATUS_HAVE_NO_MEMORY(tmp_sid
);
329 *res_sids
= talloc_realloc(res_sids_ctx
, *res_sids
,
330 struct dom_sid
*, *num_res_sids
+ 1);
331 NT_STATUS_HAVE_NO_MEMORY(*res_sids
);
332 (*res_sids
)[*num_res_sids
] = tmp_sid
;
336 tmp_ctx
= talloc_new(sam_ctx
);
338 ret
= gendb_search(sam_ctx
, tmp_ctx
, NULL
, &res
, attrs
,
339 "objectSid=%s", ldap_encode_ndr_dom_sid(tmp_ctx
, sid
));
341 talloc_free(tmp_ctx
);
342 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
345 if (res
[0]->num_elements
== 0) {
347 talloc_free(tmp_ctx
);
351 for (i
= 0; i
< res
[0]->elements
[0].num_values
; i
++) {
352 tmp_dn
= ldb_dn_from_ldb_val(tmp_ctx
, sam_ctx
,
353 &res
[0]->elements
[0].values
[i
]);
354 tmp_sid
= samdb_search_dom_sid(sam_ctx
, tmp_ctx
, tmp_dn
,
357 status
= authsam_expand_nested_groups(sam_ctx
, tmp_sid
,
358 false, res_sids_ctx
, res_sids
, num_res_sids
);
359 if (!NT_STATUS_IS_OK(status
)) {
361 talloc_free(tmp_ctx
);
367 talloc_free(tmp_ctx
);
372 _PUBLIC_ NTSTATUS
authsam_make_server_info(TALLOC_CTX
*mem_ctx
,
373 struct ldb_context
*sam_ctx
,
374 const char *netbios_name
,
375 const char *domain_name
,
376 struct ldb_dn
*domain_dn
,
377 struct ldb_message
*msg
,
378 DATA_BLOB user_sess_key
,
379 DATA_BLOB lm_sess_key
,
380 struct auth_serversupplied_info
384 struct auth_serversupplied_info
*server_info
;
386 struct dom_sid
*tmp_sid
;
387 /* SIDs for the account and his primary group */
388 struct dom_sid
*account_sid
;
389 struct dom_sid
*primary_group_sid
;
390 /* SID structures for the expanded group memberships */
391 struct dom_sid
**groupSIDs
= NULL
, **groupSIDs_2
= NULL
;
392 int num_groupSIDs
= 0, num_groupSIDs_2
= 0, i
;
393 uint32_t userAccountControl
;
395 server_info
= talloc(mem_ctx
, struct auth_serversupplied_info
);
396 NT_STATUS_HAVE_NO_MEMORY(server_info
);
398 account_sid
= samdb_result_dom_sid(server_info
, msg
, "objectSid");
399 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(account_sid
, server_info
);
401 primary_group_sid
= dom_sid_add_rid(server_info
,
402 samdb_domain_sid(sam_ctx
),
403 samdb_result_uint(msg
, "primaryGroupID", ~0));
404 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(primary_group_sid
, server_info
);
406 /* Expands the primary group */
407 status
= authsam_expand_nested_groups(sam_ctx
, primary_group_sid
, false,
408 server_info
, &groupSIDs
, &num_groupSIDs
);
409 if (!NT_STATUS_IS_OK(status
)) {
410 talloc_free(server_info
);
414 /* Expands the additional groups */
415 status
= authsam_expand_nested_groups(sam_ctx
, account_sid
, true,
416 server_info
, &groupSIDs_2
, &num_groupSIDs_2
);
417 if (!NT_STATUS_IS_OK(status
)) {
418 talloc_free(server_info
);
422 /* Merge the two expanded structures (groupSIDs, groupSIDs_2) */
423 for (i
= 0; i
< num_groupSIDs_2
; i
++)
424 if (!sids_contains_sid((const struct dom_sid
**) groupSIDs
,
425 num_groupSIDs
, groupSIDs_2
[i
])) {
426 tmp_sid
= dom_sid_dup(server_info
, groupSIDs_2
[i
]);
427 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(tmp_sid
, server_info
);
428 groupSIDs
= talloc_realloc(server_info
, groupSIDs
,
429 struct dom_sid
*, num_groupSIDs
+ 1);
430 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs
,
432 groupSIDs
[num_groupSIDs
] = tmp_sid
;
435 talloc_free(groupSIDs_2
);
437 server_info
->account_sid
= account_sid
;
438 server_info
->primary_group_sid
= primary_group_sid
;
440 /* DCs also get SID_NT_ENTERPRISE_DCS */
441 userAccountControl
= ldb_msg_find_attr_as_uint(msg
, "userAccountControl", 0);
442 if (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) {
443 groupSIDs
= talloc_realloc(server_info
, groupSIDs
, struct dom_sid
*,
445 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs
, server_info
);
446 groupSIDs
[num_groupSIDs
] = dom_sid_parse_talloc(groupSIDs
, SID_NT_ENTERPRISE_DCS
);
447 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs
[num_groupSIDs
], server_info
);
451 server_info
->domain_groups
= groupSIDs
;
452 server_info
->n_domain_groups
= num_groupSIDs
;
454 server_info
->account_name
= talloc_steal(server_info
,
455 samdb_result_string(msg
, "sAMAccountName", NULL
));
457 server_info
->domain_name
= talloc_strdup(server_info
, domain_name
);
458 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->domain_name
,
461 str
= samdb_result_string(msg
, "displayName", "");
462 server_info
->full_name
= talloc_strdup(server_info
, str
);
463 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->full_name
, server_info
);
465 str
= samdb_result_string(msg
, "scriptPath", "");
466 server_info
->logon_script
= talloc_strdup(server_info
, str
);
467 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->logon_script
,
470 str
= samdb_result_string(msg
, "profilePath", "");
471 server_info
->profile_path
= talloc_strdup(server_info
, str
);
472 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->profile_path
,
475 str
= samdb_result_string(msg
, "homeDirectory", "");
476 server_info
->home_directory
= talloc_strdup(server_info
, str
);
477 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->home_directory
,
480 str
= samdb_result_string(msg
, "homeDrive", "");
481 server_info
->home_drive
= talloc_strdup(server_info
, str
);
482 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->home_drive
, server_info
);
484 server_info
->logon_server
= talloc_strdup(server_info
, netbios_name
);
485 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->logon_server
,
488 server_info
->last_logon
= samdb_result_nttime(msg
, "lastLogon", 0);
489 server_info
->last_logoff
= samdb_result_last_logoff(msg
);
490 server_info
->acct_expiry
= samdb_result_account_expires(msg
);
491 server_info
->last_password_change
= samdb_result_nttime(msg
,
493 server_info
->allow_password_change
494 = samdb_result_allow_password_change(sam_ctx
, mem_ctx
,
495 domain_dn
, msg
, "pwdLastSet");
496 server_info
->force_password_change
497 = samdb_result_force_password_change(sam_ctx
, mem_ctx
,
499 server_info
->logon_count
= samdb_result_uint(msg
, "logonCount", 0);
500 server_info
->bad_password_count
= samdb_result_uint(msg
, "badPwdCount",
503 server_info
->acct_flags
= samdb_result_acct_flags(sam_ctx
, mem_ctx
,
506 server_info
->user_session_key
= data_blob_talloc_reference(server_info
,
508 server_info
->lm_session_key
= data_blob_talloc_reference(server_info
,
511 server_info
->authenticated
= true;
513 *_server_info
= server_info
;
518 NTSTATUS
sam_get_results_principal(struct ldb_context
*sam_ctx
,
519 TALLOC_CTX
*mem_ctx
, const char *principal
,
521 struct ldb_dn
**domain_dn
,
522 struct ldb_message
**msg
)
524 struct ldb_dn
*user_dn
;
526 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
530 return NT_STATUS_NO_MEMORY
;
533 nt_status
= crack_user_principal_name(sam_ctx
, tmp_ctx
, principal
,
534 &user_dn
, domain_dn
);
535 if (!NT_STATUS_IS_OK(nt_status
)) {
536 talloc_free(tmp_ctx
);
540 /* pull the user attributes */
541 ret
= gendb_search_single_extended_dn(sam_ctx
, tmp_ctx
, user_dn
,
542 LDB_SCOPE_BASE
, msg
, attrs
, "(objectClass=*)");
543 if (ret
!= LDB_SUCCESS
) {
544 talloc_free(tmp_ctx
);
545 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
547 talloc_steal(mem_ctx
, *msg
);
548 talloc_steal(mem_ctx
, *domain_dn
);
549 talloc_free(tmp_ctx
);