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 "dsdb/samdb/samdb.h"
28 #include "libcli/security/security.h"
29 #include "auth/auth_sam.h"
30 #include "dsdb/common/util.h"
32 #define KRBTGT_ATTRS \
33 /* required for the krb5 kdc */ \
36 "userPrincipalName", \
37 "servicePrincipalName", \
38 "msDS-KeyVersionNumber", \
39 "msDS-SupportedEncryptionTypes", \
40 "supplementalCredentials", \
46 "userAccountControl", \
52 const char *krbtgt_attrs
[] = {
56 const char *server_attrs
[] = {
60 const char *user_attrs
[] = {
65 /* check 'allowed workstations' */
68 /* required for server_info, not access control: */
84 /****************************************************************************
85 Check if a user is allowed to logon at this time. Note this is the
86 servers local time, as logon hours are just specified as a weekly
88 ****************************************************************************/
90 static bool logon_hours_ok(struct ldb_message
*msg
, const char *name_for_logs
)
92 /* In logon hours first bit is Sunday from 12AM to 1AM */
93 const struct ldb_val
*hours
;
97 uint8_t bitmask
, bitpos
;
99 hours
= ldb_msg_find_ldb_val(msg
, "logonHours");
101 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs
));
105 if (hours
->length
!= 168/8) {
106 DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs
));
110 lasttime
= time(NULL
);
111 utctime
= gmtime(&lasttime
);
113 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
118 /* find the corresponding byte and bit */
119 bitpos
= (utctime
->tm_wday
* 24 + utctime
->tm_hour
) % 168;
120 bitmask
= 1 << (bitpos
% 8);
122 if (! (hours
->data
[bitpos
/8] & bitmask
)) {
123 struct tm
*t
= localtime(&lasttime
);
125 asct
= "INVALID TIME";
129 asct
= "INVALID TIME";
133 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
134 "logon at this time (%s).\n",
135 name_for_logs
, asct
));
139 asct
= asctime(utctime
);
140 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
141 name_for_logs
, asct
? asct
: "UNKNOWN TIME" ));
146 /****************************************************************************
147 Do a specific test for a SAM_ACCOUNT being valid for this connection
148 (ie not disabled, expired and the like).
149 ****************************************************************************/
150 _PUBLIC_ NTSTATUS
authsam_account_ok(TALLOC_CTX
*mem_ctx
,
151 struct ldb_context
*sam_ctx
,
152 uint32_t logon_parameters
,
153 struct ldb_dn
*domain_dn
,
154 struct ldb_message
*msg
,
155 const char *logon_workstation
,
156 const char *name_for_logs
,
157 bool allow_domain_trust
,
158 bool password_change
)
161 const char *workstation_list
;
163 NTTIME must_change_time
;
166 DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs
));
168 acct_flags
= samdb_result_acct_flags(sam_ctx
, mem_ctx
, msg
, domain_dn
);
170 acct_expiry
= samdb_result_account_expires(msg
);
172 /* Check for when we must change this password, taking the
173 * userAccountControl flags into account */
174 must_change_time
= samdb_result_force_password_change(sam_ctx
, mem_ctx
,
177 workstation_list
= samdb_result_string(msg
, "userWorkstations", NULL
);
179 /* Quit if the account was disabled. */
180 if (acct_flags
& ACB_DISABLED
) {
181 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs
));
182 return NT_STATUS_ACCOUNT_DISABLED
;
185 /* Quit if the account was locked out. */
186 if (acct_flags
& ACB_AUTOLOCK
) {
187 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs
));
188 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
191 /* Test account expire time */
192 unix_to_nt_time(&now
, time(NULL
));
193 if (now
> acct_expiry
) {
194 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs
));
195 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
196 nt_time_string(mem_ctx
, acct_expiry
)));
197 return NT_STATUS_ACCOUNT_EXPIRED
;
200 /* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
201 if ((must_change_time
== 0) && !password_change
) {
202 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
204 return NT_STATUS_PASSWORD_MUST_CHANGE
;
207 /* check for expired password (but not if this is a password change request) */
208 if ((must_change_time
< now
) && !password_change
) {
209 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
211 DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
212 nt_time_string(mem_ctx
, must_change_time
)));
213 return NT_STATUS_PASSWORD_EXPIRED
;
216 /* Test workstation. Workstation list is comma separated. */
217 if (logon_workstation
&& workstation_list
&& *workstation_list
) {
218 bool invalid_ws
= true;
220 const char **workstations
= (const char **)str_list_make(mem_ctx
, workstation_list
, ",");
222 for (i
= 0; workstations
&& workstations
[i
]; i
++) {
223 DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
224 workstations
[i
], logon_workstation
));
226 if (strequal(workstations
[i
], logon_workstation
)) {
232 talloc_free(workstations
);
235 return NT_STATUS_INVALID_WORKSTATION
;
239 if (!logon_hours_ok(msg
, name_for_logs
)) {
240 return NT_STATUS_INVALID_LOGON_HOURS
;
243 if (!allow_domain_trust
) {
244 if (acct_flags
& ACB_DOMTRUST
) {
245 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs
));
246 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT
;
249 if (!(logon_parameters
& MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
)) {
250 if (acct_flags
& ACB_SVRTRUST
) {
251 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs
));
252 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT
;
255 if (!(logon_parameters
& MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
)) {
256 /* TODO: this fails with current solaris client. We
257 need to work with Gordon to work out why */
258 if (acct_flags
& ACB_WSTRUST
) {
259 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs
));
260 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT
;
267 /* This function tests if a SID structure "sids" contains the SID "sid" */
268 static bool sids_contains_sid(const struct dom_sid
**sids
,
269 const unsigned int num_sids
,
270 const struct dom_sid
*sid
)
274 for (i
= 0; i
< num_sids
; i
++) {
275 if (dom_sid_equal(sids
[i
], sid
))
283 * This function generates the transitive closure of a given SAM object "dn_val"
284 * (it basically expands nested memberships).
285 * If the object isn't located in the "res_sids" structure yet and the
286 * "only_childs" flag is false, we add it to "res_sids".
287 * Then we've always to consider the "memberOf" attributes. We invoke the
288 * function recursively on each of it with the "only_childs" flag set to
290 * The "only_childs" flag is particularly useful if you have a user object and
291 * want to include all it's groups (referenced with "memberOf") but not itself
292 * or considering if that object matches the filter.
294 * At the beginning "res_sids" should reference to a NULL pointer.
296 NTSTATUS
authsam_expand_nested_groups(struct ldb_context
*sam_ctx
,
297 struct ldb_val
*dn_val
, const bool only_childs
, const char *filter
,
298 TALLOC_CTX
*res_sids_ctx
, struct dom_sid
***res_sids
,
299 unsigned int *num_res_sids
)
301 const char * const attrs
[] = { "memberOf", NULL
};
308 struct ldb_result
*res
;
310 const struct ldb_message_element
*el
;
312 if (*res_sids
== NULL
) {
316 tmp_ctx
= talloc_new(res_sids_ctx
);
318 dn
= ldb_dn_from_ldb_val(tmp_ctx
, sam_ctx
, dn_val
);
320 talloc_free(tmp_ctx
);
321 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
324 status
= dsdb_get_extended_dn_sid(dn
, &sid
, "SID");
325 if (!NT_STATUS_IS_OK(status
)) {
326 DEBUG(0, (__location__
": when parsing DN %s we failed to find our SID component, so we cannot calculate the group token: %s\n",
327 ldb_dn_get_extended_linearized(tmp_ctx
, dn
, 1),
329 talloc_free(tmp_ctx
);
330 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
334 DEBUG(0, ("No SAM available, cannot determine local groups\n"));
335 talloc_free(tmp_ctx
);
336 return NT_STATUS_INVALID_SYSTEM_SERVICE
;
340 ret
= dsdb_search_dn(sam_ctx
, tmp_ctx
, &res
, dn
, attrs
,
341 DSDB_SEARCH_SHOW_EXTENDED_DN
);
343 /* This is an O(n^2) linear search */
344 already_there
= sids_contains_sid((const struct dom_sid
**) *res_sids
,
345 *num_res_sids
, &sid
);
350 ret
= dsdb_search(sam_ctx
, tmp_ctx
, &res
, dn
, LDB_SCOPE_BASE
,
351 attrs
, DSDB_SEARCH_SHOW_EXTENDED_DN
, "%s",
355 if (ret
== LDB_ERR_NO_SUCH_OBJECT
) {
356 talloc_free(tmp_ctx
);
360 if (ret
!= LDB_SUCCESS
) {
361 talloc_free(tmp_ctx
);
362 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
365 /* We may get back 0 results, if the SID didn't match the filter - such as it wasn't a domain group, for example */
366 if (res
->count
!= 1) {
367 talloc_free(tmp_ctx
);
371 /* We only apply this test once we know the SID matches the filter */
373 *res_sids
= talloc_realloc(res_sids_ctx
, *res_sids
,
374 struct dom_sid
*, *num_res_sids
+ 1);
375 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(*res_sids
, tmp_ctx
);
376 (*res_sids
)[*num_res_sids
] = dom_sid_dup(*res_sids
, &sid
);
377 NT_STATUS_HAVE_NO_MEMORY_AND_FREE((*res_sids
)[*num_res_sids
], tmp_ctx
);
381 el
= ldb_msg_find_element(res
->msgs
[0], "memberOf");
383 for (i
= 0; el
&& i
< el
->num_values
; i
++) {
384 status
= authsam_expand_nested_groups(sam_ctx
, &el
->values
[i
],
385 false, filter
, res_sids_ctx
, res_sids
, num_res_sids
);
386 if (!NT_STATUS_IS_OK(status
)) {
388 talloc_free(tmp_ctx
);
393 talloc_free(tmp_ctx
);
398 _PUBLIC_ NTSTATUS
authsam_make_server_info(TALLOC_CTX
*mem_ctx
,
399 struct ldb_context
*sam_ctx
,
400 const char *netbios_name
,
401 const char *domain_name
,
402 struct ldb_dn
*domain_dn
,
403 struct ldb_message
*msg
,
404 DATA_BLOB user_sess_key
,
405 DATA_BLOB lm_sess_key
,
406 struct auth_serversupplied_info
**_server_info
)
409 struct auth_serversupplied_info
*server_info
;
410 const char *str
, *filter
;
411 /* SIDs for the account and his primary group */
412 struct dom_sid
*account_sid
;
413 struct dom_sid
*primary_group_sid
;
414 const char *primary_group_string
;
415 const char *primary_group_dn
;
416 DATA_BLOB primary_group_blob
;
417 /* SID structures for the expanded group memberships */
418 struct dom_sid
**groupSIDs
= NULL
;
419 unsigned int num_groupSIDs
= 0, i
;
420 struct dom_sid
*domain_sid
;
422 struct ldb_message_element
*el
;
424 server_info
= talloc(mem_ctx
, struct auth_serversupplied_info
);
425 NT_STATUS_HAVE_NO_MEMORY(server_info
);
427 tmp_ctx
= talloc_new(server_info
);
428 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
, server_info
);
430 account_sid
= samdb_result_dom_sid(server_info
, msg
, "objectSid");
431 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(account_sid
, server_info
);
433 status
= dom_sid_split_rid(tmp_ctx
, account_sid
, &domain_sid
, NULL
);
434 if (!NT_STATUS_IS_OK(status
)) {
435 talloc_free(server_info
);
439 primary_group_sid
= dom_sid_add_rid(server_info
,
441 samdb_result_uint(msg
, "primaryGroupID", ~0));
442 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(primary_group_sid
, server_info
);
444 /* Filter out builtin groups from this token. We will search
445 * for builtin groups later, and not include them in the PAC
446 * on SamLogon validation info */
447 filter
= talloc_asprintf(tmp_ctx
, "(&(objectClass=group)(!(groupType:1.2.840.113556.1.4.803:=%u))(groupType:1.2.840.113556.1.4.803:=%u))", GROUP_TYPE_BUILTIN_LOCAL_GROUP
, GROUP_TYPE_SECURITY_ENABLED
);
448 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(filter
, server_info
);
450 primary_group_string
= dom_sid_string(tmp_ctx
, primary_group_sid
);
451 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(primary_group_string
, server_info
);
453 primary_group_dn
= talloc_asprintf(tmp_ctx
, "<SID=%s>", primary_group_string
);
454 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(primary_group_dn
, server_info
);
456 primary_group_blob
= data_blob_string_const(primary_group_dn
);
458 /* Expands the primary group - this function takes in
459 * memberOf-like values, so we fake one up with the
460 * <SID=S-...> format of DN and then let it expand
461 * them, as long as they meet the filter - so only
462 * domain groups, not builtin groups
464 * The primary group is still treated specially, so we set the
465 * 'only childs' flag to true
467 status
= authsam_expand_nested_groups(sam_ctx
, &primary_group_blob
, true, filter
,
468 server_info
, &groupSIDs
, &num_groupSIDs
);
469 if (!NT_STATUS_IS_OK(status
)) {
470 talloc_free(server_info
);
474 /* Expands the additional groups */
475 el
= ldb_msg_find_element(msg
, "memberOf");
476 for (i
= 0; el
&& i
< el
->num_values
; i
++) {
477 /* This function takes in memberOf values and expands
478 * them, as long as they meet the filter - so only
479 * domain groups, not builtin groups */
480 status
= authsam_expand_nested_groups(sam_ctx
, &el
->values
[i
], false, filter
,
481 server_info
, &groupSIDs
, &num_groupSIDs
);
482 if (!NT_STATUS_IS_OK(status
)) {
483 talloc_free(server_info
);
488 server_info
->account_sid
= account_sid
;
489 server_info
->primary_group_sid
= primary_group_sid
;
491 server_info
->domain_groups
= groupSIDs
;
492 server_info
->n_domain_groups
= num_groupSIDs
;
494 server_info
->account_name
= talloc_steal(server_info
,
495 samdb_result_string(msg
, "sAMAccountName", NULL
));
497 server_info
->domain_name
= talloc_strdup(server_info
, domain_name
);
498 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->domain_name
,
501 str
= samdb_result_string(msg
, "displayName", "");
502 server_info
->full_name
= talloc_strdup(server_info
, str
);
503 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->full_name
, server_info
);
505 str
= samdb_result_string(msg
, "scriptPath", "");
506 server_info
->logon_script
= talloc_strdup(server_info
, str
);
507 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->logon_script
,
510 str
= samdb_result_string(msg
, "profilePath", "");
511 server_info
->profile_path
= talloc_strdup(server_info
, str
);
512 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->profile_path
,
515 str
= samdb_result_string(msg
, "homeDirectory", "");
516 server_info
->home_directory
= talloc_strdup(server_info
, str
);
517 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->home_directory
,
520 str
= samdb_result_string(msg
, "homeDrive", "");
521 server_info
->home_drive
= talloc_strdup(server_info
, str
);
522 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->home_drive
, server_info
);
524 server_info
->logon_server
= talloc_strdup(server_info
, netbios_name
);
525 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->logon_server
,
528 server_info
->last_logon
= samdb_result_nttime(msg
, "lastLogon", 0);
529 server_info
->last_logoff
= samdb_result_last_logoff(msg
);
530 server_info
->acct_expiry
= samdb_result_account_expires(msg
);
531 server_info
->last_password_change
= samdb_result_nttime(msg
,
533 server_info
->allow_password_change
534 = samdb_result_allow_password_change(sam_ctx
, mem_ctx
,
535 domain_dn
, msg
, "pwdLastSet");
536 server_info
->force_password_change
537 = samdb_result_force_password_change(sam_ctx
, mem_ctx
,
539 server_info
->logon_count
= samdb_result_uint(msg
, "logonCount", 0);
540 server_info
->bad_password_count
= samdb_result_uint(msg
, "badPwdCount",
543 server_info
->acct_flags
= samdb_result_acct_flags(sam_ctx
, mem_ctx
,
546 server_info
->user_session_key
= data_blob_talloc(server_info
,
548 user_sess_key
.length
);
549 if (user_sess_key
.data
) {
550 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->user_session_key
.data
,
553 server_info
->lm_session_key
= data_blob_talloc(server_info
,
556 if (lm_sess_key
.data
) {
557 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info
->lm_session_key
.data
,
561 server_info
->authenticated
= true;
563 talloc_free(tmp_ctx
);
564 *_server_info
= server_info
;
569 NTSTATUS
sam_get_results_principal(struct ldb_context
*sam_ctx
,
570 TALLOC_CTX
*mem_ctx
, const char *principal
,
572 struct ldb_dn
**domain_dn
,
573 struct ldb_message
**msg
)
575 struct ldb_dn
*user_dn
;
577 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
581 return NT_STATUS_NO_MEMORY
;
584 nt_status
= crack_user_principal_name(sam_ctx
, tmp_ctx
, principal
,
585 &user_dn
, domain_dn
);
586 if (!NT_STATUS_IS_OK(nt_status
)) {
587 talloc_free(tmp_ctx
);
591 /* pull the user attributes */
592 ret
= dsdb_search_one(sam_ctx
, tmp_ctx
, msg
, user_dn
,
593 LDB_SCOPE_BASE
, attrs
, DSDB_SEARCH_SHOW_EXTENDED_DN
, "(objectClass=*)");
594 if (ret
!= LDB_SUCCESS
) {
595 talloc_free(tmp_ctx
);
596 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
598 talloc_steal(mem_ctx
, *msg
);
599 talloc_steal(mem_ctx
, *domain_dn
);
600 talloc_free(tmp_ctx
);