Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 : Password and authentication handling
4 : Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2010
5 : Copyright (C) Gerald Carter 2003
6 : Copyright (C) Stefan Metzmacher 2005
7 : Copyright (C) Matthias Dieter Wallnöfer 2009
8 :
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.
13 :
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.
18 :
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/>.
21 : */
22 :
23 : #include "includes.h"
24 : #include "system/time.h"
25 : #include "auth/auth.h"
26 : #include <ldb.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"
31 : #include "libcli/ldap/ldap_ndr.h"
32 : #include "param/param.h"
33 : #include "librpc/gen_ndr/ndr_winbind_c.h"
34 : #include "lib/dbwrap/dbwrap.h"
35 : #include "cluster/cluster.h"
36 :
37 : #undef DBGC_CLASS
38 : #define DBGC_CLASS DBGC_AUTH
39 :
40 : #define KRBTGT_ATTRS \
41 : /* required for the krb5 kdc */ \
42 : "objectClass", \
43 : "sAMAccountName", \
44 : "userPrincipalName", \
45 : "servicePrincipalName", \
46 : "msDS-KeyVersionNumber", \
47 : "msDS-SecondaryKrbTgtNumber", \
48 : "msDS-SupportedEncryptionTypes", \
49 : "supplementalCredentials", \
50 : "msDS-AllowedToDelegateTo", \
51 : "msDS-AllowedToActOnBehalfOfOtherIdentity", \
52 : \
53 : /* passwords */ \
54 : "unicodePwd", \
55 : \
56 : "userAccountControl", \
57 : "msDS-User-Account-Control-Computed", \
58 : "objectSid", \
59 : \
60 : "pwdLastSet", \
61 : "msDS-UserPasswordExpiryTimeComputed", \
62 : "accountExpires", \
63 : \
64 : /* Needed for RODC rule processing */ \
65 : "msDS-KrbTgtLinkBL"
66 :
67 : const char *krbtgt_attrs[] = {
68 : KRBTGT_ATTRS, NULL
69 : };
70 :
71 : const char *server_attrs[] = {
72 : KRBTGT_ATTRS, NULL
73 : };
74 :
75 : const char *user_attrs[] = {
76 : /*
77 : * This ordering (having msDS-ResultantPSO first) is
78 : * important. By processing this attribute first it is
79 : * available in the operational module for the other PSO
80 : * attribute calcuations to use.
81 : */
82 : "msDS-ResultantPSO",
83 :
84 : KRBTGT_ATTRS,
85 :
86 : "logonHours",
87 :
88 : /*
89 : * To allow us to zero the badPwdCount and lockoutTime on
90 : * successful logon, without database churn
91 : */
92 : "lockoutTime",
93 :
94 : /*
95 : * Needed for SendToSAM requests
96 : */
97 : "objectGUID",
98 :
99 : /* check 'allowed workstations' */
100 : "userWorkstations",
101 :
102 : /* required for user_info_dc, not access control: */
103 : "displayName",
104 : "scriptPath",
105 : "profilePath",
106 : "homeDirectory",
107 : "homeDrive",
108 : "lastLogon",
109 : "lastLogonTimestamp",
110 : "lastLogoff",
111 : "accountExpires",
112 : "badPwdCount",
113 : "logonCount",
114 : "primaryGroupID",
115 : "memberOf",
116 : "badPasswordTime",
117 : "lmPwdHistory",
118 : "ntPwdHistory",
119 : NULL,
120 : };
121 :
122 : /****************************************************************************
123 : Check if a user is allowed to logon at this time. Note this is the
124 : servers local time, as logon hours are just specified as a weekly
125 : bitmask.
126 : ****************************************************************************/
127 :
128 36439 : static bool logon_hours_ok(struct ldb_message *msg, const char *name_for_logs)
129 : {
130 : /* In logon hours first bit is Sunday from 12AM to 1AM */
131 : const struct ldb_val *hours;
132 : struct tm *utctime;
133 : time_t lasttime;
134 : const char *asct;
135 : uint8_t bitmask, bitpos;
136 :
137 36439 : hours = ldb_msg_find_ldb_val(msg, "logonHours");
138 36439 : if (!hours) {
139 36439 : DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs));
140 36439 : return true;
141 : }
142 :
143 0 : if (hours->length != 168/8) {
144 0 : DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs));
145 0 : return true;
146 : }
147 :
148 0 : lasttime = time(NULL);
149 0 : utctime = gmtime(&lasttime);
150 0 : if (!utctime) {
151 0 : DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
152 : name_for_logs));
153 0 : return false;
154 : }
155 :
156 : /* find the corresponding byte and bit */
157 0 : bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
158 0 : bitmask = 1 << (bitpos % 8);
159 :
160 0 : if (! (hours->data[bitpos/8] & bitmask)) {
161 0 : struct tm *t = localtime(&lasttime);
162 0 : if (!t) {
163 0 : asct = "INVALID TIME";
164 : } else {
165 0 : asct = asctime(t);
166 0 : if (!asct) {
167 0 : asct = "INVALID TIME";
168 : }
169 : }
170 :
171 0 : DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
172 : "logon at this time (%s).\n",
173 : name_for_logs, asct ));
174 0 : return false;
175 : }
176 :
177 0 : asct = asctime(utctime);
178 0 : DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
179 : name_for_logs, asct ? asct : "UNKNOWN TIME" ));
180 :
181 0 : return true;
182 : }
183 :
184 : /****************************************************************************
185 : Do a specific test for a SAM_ACCOUNT being valid for this connection
186 : (ie not disabled, expired and the like).
187 : ****************************************************************************/
188 37059 : _PUBLIC_ NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
189 : struct ldb_context *sam_ctx,
190 : uint32_t logon_parameters,
191 : struct ldb_dn *domain_dn,
192 : struct ldb_message *msg,
193 : const char *logon_workstation,
194 : const char *name_for_logs,
195 : bool allow_domain_trust,
196 : bool password_change)
197 : {
198 : uint16_t acct_flags;
199 : const char *workstation_list;
200 : NTTIME acct_expiry;
201 : NTTIME must_change_time;
202 37059 : struct timeval tv_now = timeval_current();
203 37059 : NTTIME now = timeval_to_nttime(&tv_now);
204 :
205 37059 : DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
206 :
207 37059 : acct_flags = samdb_result_acct_flags(msg, "msDS-User-Account-Control-Computed");
208 :
209 37059 : acct_expiry = samdb_result_account_expires(msg);
210 :
211 : /* Check for when we must change this password, taking the
212 : * userAccountControl flags into account */
213 37059 : must_change_time = samdb_result_nttime(msg,
214 : "msDS-UserPasswordExpiryTimeComputed", 0);
215 :
216 37059 : workstation_list = ldb_msg_find_attr_as_string(msg, "userWorkstations", NULL);
217 :
218 : /* Quit if the account was disabled. */
219 37059 : if (acct_flags & ACB_DISABLED) {
220 266 : DEBUG(2,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
221 266 : return NT_STATUS_ACCOUNT_DISABLED;
222 : }
223 :
224 : /* Quit if the account was locked out. */
225 36793 : if (acct_flags & ACB_AUTOLOCK) {
226 0 : DEBUG(2,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
227 0 : return NT_STATUS_ACCOUNT_LOCKED_OUT;
228 : }
229 :
230 : /* Test account expire time */
231 36793 : if (now > acct_expiry) {
232 0 : DEBUG(2,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
233 0 : DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
234 : nt_time_string(mem_ctx, acct_expiry)));
235 0 : return NT_STATUS_ACCOUNT_EXPIRED;
236 : }
237 :
238 : /* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
239 36793 : if ((must_change_time == 0) && !password_change) {
240 11 : DEBUG(2,("sam_account_ok: Account for user '%s' password must change!.\n",
241 : name_for_logs));
242 11 : return NT_STATUS_PASSWORD_MUST_CHANGE;
243 : }
244 :
245 : /* check for expired password (but not if this is a password change request) */
246 36782 : if ((must_change_time < now) && !password_change) {
247 0 : DEBUG(2,("sam_account_ok: Account for user '%s' password expired!.\n",
248 : name_for_logs));
249 0 : DEBUG(2,("sam_account_ok: Password expired at '%s' unix time.\n",
250 : nt_time_string(mem_ctx, must_change_time)));
251 0 : return NT_STATUS_PASSWORD_EXPIRED;
252 : }
253 :
254 : /* Test workstation. Workstation list is comma separated. */
255 36782 : if (logon_workstation && workstation_list && *workstation_list) {
256 343 : bool invalid_ws = true;
257 : int i;
258 343 : char **workstations = str_list_make(mem_ctx, workstation_list, ",");
259 :
260 686 : for (i = 0; workstations && workstations[i]; i++) {
261 343 : DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
262 : workstations[i], logon_workstation));
263 :
264 343 : if (strequal(workstations[i], logon_workstation)) {
265 0 : invalid_ws = false;
266 0 : break;
267 : }
268 : }
269 :
270 343 : talloc_free(workstations);
271 :
272 343 : if (invalid_ws) {
273 343 : return NT_STATUS_INVALID_WORKSTATION;
274 : }
275 : }
276 :
277 36439 : if (!logon_hours_ok(msg, name_for_logs)) {
278 0 : return NT_STATUS_INVALID_LOGON_HOURS;
279 : }
280 :
281 36439 : if (!allow_domain_trust) {
282 18014 : if (acct_flags & ACB_DOMTRUST) {
283 0 : DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
284 0 : return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
285 : }
286 : }
287 36439 : if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
288 6704 : if (acct_flags & ACB_SVRTRUST) {
289 0 : DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
290 0 : return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
291 : }
292 : }
293 36439 : if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
294 : /* TODO: this fails with current solaris client. We
295 : need to work with Gordon to work out why */
296 5678 : if (acct_flags & ACB_WSTRUST) {
297 342 : DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
298 342 : return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
299 : }
300 : }
301 :
302 36097 : return NT_STATUS_OK;
303 : }
304 :
305 90635 : static NTSTATUS authsam_domain_group_filter(TALLOC_CTX *mem_ctx,
306 : char **_filter)
307 : {
308 90635 : char *filter = NULL;
309 :
310 90635 : *_filter = NULL;
311 :
312 90635 : filter = talloc_strdup(mem_ctx, "(&(objectClass=group)");
313 :
314 : /*
315 : * Skip all builtin groups, they're added later.
316 : */
317 90635 : talloc_asprintf_addbuf(&filter,
318 : "(!(groupType:1.2.840.113556.1.4.803:=%u))",
319 : GROUP_TYPE_BUILTIN_LOCAL_GROUP);
320 : /*
321 : * Only include security groups.
322 : */
323 90635 : talloc_asprintf_addbuf(&filter,
324 : "(groupType:1.2.840.113556.1.4.803:=%u))",
325 : GROUP_TYPE_SECURITY_ENABLED);
326 90635 : if (filter == NULL) {
327 0 : return NT_STATUS_NO_MEMORY;
328 : }
329 :
330 90635 : *_filter = filter;
331 90635 : return NT_STATUS_OK;
332 : }
333 :
334 54208 : _PUBLIC_ NTSTATUS authsam_make_user_info_dc(TALLOC_CTX *mem_ctx,
335 : struct ldb_context *sam_ctx,
336 : const char *netbios_name,
337 : const char *domain_name,
338 : const char *dns_domain_name,
339 : struct ldb_dn *domain_dn,
340 : struct ldb_message *msg,
341 : DATA_BLOB user_sess_key,
342 : DATA_BLOB lm_sess_key,
343 : struct auth_user_info_dc **_user_info_dc)
344 : {
345 : NTSTATUS status;
346 : struct auth_user_info_dc *user_info_dc;
347 : struct auth_user_info *info;
348 54208 : const char *str = NULL;
349 54208 : char *filter = NULL;
350 : /* SIDs for the account and his primary group */
351 : struct dom_sid *account_sid;
352 : struct dom_sid_buf buf;
353 : const char *primary_group_dn;
354 : DATA_BLOB primary_group_blob;
355 : /* SID structures for the expanded group memberships */
356 54208 : struct dom_sid *sids = NULL;
357 54208 : unsigned int num_sids = 0, i;
358 : struct dom_sid *domain_sid;
359 : TALLOC_CTX *tmp_ctx;
360 : struct ldb_message_element *el;
361 :
362 54208 : user_info_dc = talloc_zero(mem_ctx, struct auth_user_info_dc);
363 54208 : NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
364 :
365 54208 : tmp_ctx = talloc_new(user_info_dc);
366 54208 : if (tmp_ctx == NULL) {
367 0 : TALLOC_FREE(user_info_dc);
368 0 : return NT_STATUS_NO_MEMORY;
369 : }
370 :
371 54208 : sids = talloc_array(user_info_dc, struct dom_sid, 2);
372 54208 : if (sids == NULL) {
373 0 : TALLOC_FREE(user_info_dc);
374 0 : return NT_STATUS_NO_MEMORY;
375 : }
376 :
377 54208 : num_sids = 2;
378 :
379 54208 : account_sid = samdb_result_dom_sid(tmp_ctx, msg, "objectSid");
380 54208 : if (account_sid == NULL) {
381 0 : TALLOC_FREE(user_info_dc);
382 0 : return NT_STATUS_NO_MEMORY;
383 : }
384 :
385 54208 : status = dom_sid_split_rid(tmp_ctx, account_sid, &domain_sid, NULL);
386 54208 : if (!NT_STATUS_IS_OK(status)) {
387 0 : talloc_free(user_info_dc);
388 0 : return status;
389 : }
390 :
391 54208 : sids[PRIMARY_USER_SID_INDEX] = *account_sid;
392 54208 : sids[PRIMARY_GROUP_SID_INDEX] = *domain_sid;
393 54208 : sid_append_rid(&sids[PRIMARY_GROUP_SID_INDEX], ldb_msg_find_attr_as_uint(msg, "primaryGroupID", ~0));
394 :
395 : /*
396 : * Filter out builtin groups from this token. We will search
397 : * for builtin groups later, and not include them in the PAC
398 : * or SamLogon validation info.
399 : */
400 54208 : status = authsam_domain_group_filter(tmp_ctx, &filter);
401 54208 : if (!NT_STATUS_IS_OK(status)) {
402 0 : TALLOC_FREE(user_info_dc);
403 0 : return status;
404 : }
405 :
406 54208 : primary_group_dn = talloc_asprintf(
407 : tmp_ctx,
408 : "<SID=%s>",
409 54208 : dom_sid_str_buf(&sids[PRIMARY_GROUP_SID_INDEX], &buf));
410 54208 : if (primary_group_dn == NULL) {
411 0 : TALLOC_FREE(user_info_dc);
412 0 : return NT_STATUS_NO_MEMORY;
413 : }
414 :
415 54208 : primary_group_blob = data_blob_string_const(primary_group_dn);
416 :
417 : /* Expands the primary group - this function takes in
418 : * memberOf-like values, so we fake one up with the
419 : * <SID=S-...> format of DN and then let it expand
420 : * them, as long as they meet the filter - so only
421 : * domain groups, not builtin groups
422 : *
423 : * The primary group is still treated specially, so we set the
424 : * 'only childs' flag to true
425 : */
426 54208 : status = dsdb_expand_nested_groups(sam_ctx, &primary_group_blob, true, filter,
427 : user_info_dc, &sids, &num_sids);
428 54208 : if (!NT_STATUS_IS_OK(status)) {
429 0 : talloc_free(user_info_dc);
430 0 : return status;
431 : }
432 :
433 : /* Expands the additional groups */
434 54208 : el = ldb_msg_find_element(msg, "memberOf");
435 213684 : for (i = 0; el && i < el->num_values; i++) {
436 : /* This function takes in memberOf values and expands
437 : * them, as long as they meet the filter - so only
438 : * domain groups, not builtin groups */
439 159476 : status = dsdb_expand_nested_groups(sam_ctx, &el->values[i], false, filter,
440 : user_info_dc, &sids, &num_sids);
441 159476 : if (!NT_STATUS_IS_OK(status)) {
442 0 : talloc_free(user_info_dc);
443 0 : return status;
444 : }
445 : }
446 :
447 54208 : user_info_dc->sids = sids;
448 54208 : user_info_dc->num_sids = num_sids;
449 :
450 54208 : user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
451 54208 : NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
452 :
453 54208 : str = ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL);
454 54208 : info->account_name = talloc_strdup(info, str);
455 54208 : if (info->account_name == NULL) {
456 0 : TALLOC_FREE(user_info_dc);
457 0 : return NT_STATUS_NO_MEMORY;
458 : }
459 :
460 54208 : str = ldb_msg_find_attr_as_string(msg, "userPrincipalName", NULL);
461 54208 : if (str == NULL && dns_domain_name != NULL) {
462 43935 : info->user_principal_name = talloc_asprintf(info, "%s@%s",
463 : info->account_name,
464 : dns_domain_name);
465 43935 : if (info->user_principal_name == NULL) {
466 0 : TALLOC_FREE(user_info_dc);
467 0 : return NT_STATUS_NO_MEMORY;
468 : }
469 43935 : info->user_principal_constructed = true;
470 10273 : } else if (str != NULL) {
471 10175 : info->user_principal_name = talloc_strdup(info, str);
472 10175 : if (info->user_principal_name == NULL) {
473 0 : TALLOC_FREE(user_info_dc);
474 0 : return NT_STATUS_NO_MEMORY;
475 : }
476 : }
477 :
478 54208 : info->domain_name = talloc_strdup(info, domain_name);
479 54208 : if (info->domain_name == NULL) {
480 0 : TALLOC_FREE(user_info_dc);
481 0 : return NT_STATUS_NO_MEMORY;
482 : }
483 :
484 54208 : if (dns_domain_name != NULL) {
485 54110 : info->dns_domain_name = talloc_strdup(info, dns_domain_name);
486 54110 : if (info->dns_domain_name == NULL) {
487 0 : TALLOC_FREE(user_info_dc);
488 0 : return NT_STATUS_NO_MEMORY;
489 : }
490 : }
491 :
492 54208 : str = ldb_msg_find_attr_as_string(msg, "displayName", "");
493 54208 : info->full_name = talloc_strdup(info, str);
494 54208 : if (info->full_name == NULL) {
495 0 : TALLOC_FREE(user_info_dc);
496 0 : return NT_STATUS_NO_MEMORY;
497 : }
498 :
499 54208 : str = ldb_msg_find_attr_as_string(msg, "scriptPath", "");
500 54208 : info->logon_script = talloc_strdup(info, str);
501 54208 : if (info->logon_script == NULL) {
502 0 : TALLOC_FREE(user_info_dc);
503 0 : return NT_STATUS_NO_MEMORY;
504 : }
505 :
506 54208 : str = ldb_msg_find_attr_as_string(msg, "profilePath", "");
507 54208 : info->profile_path = talloc_strdup(info, str);
508 54208 : if (info->profile_path == NULL) {
509 0 : TALLOC_FREE(user_info_dc);
510 0 : return NT_STATUS_NO_MEMORY;
511 : }
512 :
513 54208 : str = ldb_msg_find_attr_as_string(msg, "homeDirectory", "");
514 54208 : info->home_directory = talloc_strdup(info, str);
515 54208 : if (info->home_directory == NULL) {
516 0 : TALLOC_FREE(user_info_dc);
517 0 : return NT_STATUS_NO_MEMORY;
518 : }
519 :
520 54208 : str = ldb_msg_find_attr_as_string(msg, "homeDrive", "");
521 54208 : info->home_drive = talloc_strdup(info, str);
522 54208 : if (info->home_drive == NULL) {
523 0 : TALLOC_FREE(user_info_dc);
524 0 : return NT_STATUS_NO_MEMORY;
525 : }
526 :
527 54208 : info->logon_server = talloc_strdup(info, netbios_name);
528 54208 : if (info->logon_server == NULL) {
529 0 : TALLOC_FREE(user_info_dc);
530 0 : return NT_STATUS_NO_MEMORY;
531 : }
532 :
533 54208 : info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
534 54208 : info->last_logoff = samdb_result_last_logoff(msg);
535 54208 : info->acct_expiry = samdb_result_account_expires(msg);
536 54208 : info->last_password_change = samdb_result_nttime(msg,
537 : "pwdLastSet", 0);
538 : info->allow_password_change
539 54208 : = samdb_result_allow_password_change(sam_ctx, mem_ctx,
540 : domain_dn, msg, "pwdLastSet");
541 54208 : info->force_password_change = samdb_result_nttime(msg,
542 : "msDS-UserPasswordExpiryTimeComputed", 0);
543 54208 : info->logon_count = ldb_msg_find_attr_as_uint(msg, "logonCount", 0);
544 54208 : info->bad_password_count = ldb_msg_find_attr_as_uint(msg, "badPwdCount",
545 : 0);
546 :
547 54208 : info->acct_flags = samdb_result_acct_flags(msg, "msDS-User-Account-Control-Computed");
548 :
549 54208 : user_info_dc->user_session_key = data_blob_talloc(user_info_dc,
550 : user_sess_key.data,
551 : user_sess_key.length);
552 54208 : if (user_sess_key.data) {
553 0 : if (user_info_dc->user_session_key.data == NULL) {
554 0 : TALLOC_FREE(user_info_dc);
555 0 : return NT_STATUS_NO_MEMORY;
556 : }
557 : }
558 54208 : user_info_dc->lm_session_key = data_blob_talloc(user_info_dc,
559 : lm_sess_key.data,
560 : lm_sess_key.length);
561 54208 : if (lm_sess_key.data) {
562 0 : if (user_info_dc->lm_session_key.data == NULL) {
563 0 : TALLOC_FREE(user_info_dc);
564 0 : return NT_STATUS_NO_MEMORY;
565 : }
566 : }
567 :
568 54208 : if (info->acct_flags & ACB_SVRTRUST) {
569 : /* the SID_NT_ENTERPRISE_DCS SID gets added into the
570 : PAC */
571 2544 : user_info_dc->sids = talloc_realloc(user_info_dc,
572 : user_info_dc->sids,
573 : struct dom_sid,
574 : user_info_dc->num_sids+1);
575 2544 : if (user_info_dc->sids == NULL) {
576 0 : TALLOC_FREE(user_info_dc);
577 0 : return NT_STATUS_NO_MEMORY;
578 : }
579 2544 : user_info_dc->sids[user_info_dc->num_sids] = global_sid_Enterprise_DCs;
580 2544 : user_info_dc->num_sids++;
581 : }
582 :
583 54208 : if ((info->acct_flags & (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) ==
584 : (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) {
585 : /* the DOMAIN_RID_ENTERPRISE_READONLY_DCS PAC */
586 664 : user_info_dc->sids = talloc_realloc(user_info_dc,
587 : user_info_dc->sids,
588 : struct dom_sid,
589 : user_info_dc->num_sids+1);
590 664 : if (user_info_dc->sids == NULL) {
591 0 : TALLOC_FREE(user_info_dc);
592 0 : return NT_STATUS_NO_MEMORY;
593 : }
594 664 : user_info_dc->sids[user_info_dc->num_sids] = *domain_sid;
595 664 : sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
596 : DOMAIN_RID_ENTERPRISE_READONLY_DCS);
597 664 : user_info_dc->num_sids++;
598 : }
599 :
600 54208 : info->authenticated = true;
601 :
602 54208 : talloc_free(tmp_ctx);
603 54208 : *_user_info_dc = user_info_dc;
604 :
605 54208 : return NT_STATUS_OK;
606 : }
607 :
608 36427 : _PUBLIC_ NTSTATUS authsam_update_user_info_dc(TALLOC_CTX *mem_ctx,
609 : struct ldb_context *sam_ctx,
610 : struct auth_user_info_dc *user_info_dc)
611 : {
612 36427 : char *filter = NULL;
613 : NTSTATUS status;
614 : uint32_t i;
615 36427 : uint32_t n = 0;
616 :
617 : /*
618 : * This function exists to expand group memberships
619 : * in the local domain (forest), as the token
620 : * may come from a different domain.
621 : */
622 :
623 : /*
624 : * Filter out builtin groups from this token. We will search
625 : * for builtin groups later.
626 : */
627 36427 : status = authsam_domain_group_filter(mem_ctx, &filter);
628 36427 : if (!NT_STATUS_IS_OK(status)) {
629 0 : TALLOC_FREE(user_info_dc);
630 0 : return status;
631 : }
632 :
633 : /*
634 : * We loop only over the existing number of
635 : * sids.
636 : */
637 36427 : n = user_info_dc->num_sids;
638 284087 : for (i = 0; i < n; i++) {
639 247660 : struct dom_sid *sid = &user_info_dc->sids[i];
640 : struct dom_sid_buf sid_buf;
641 : char dn_str[sizeof(sid_buf.buf)*2];
642 247660 : DATA_BLOB dn_blob = data_blob_null;
643 :
644 247660 : snprintf(dn_str,
645 : sizeof(dn_str),
646 : "<SID=%s>",
647 : dom_sid_str_buf(sid, &sid_buf));
648 247660 : dn_blob = data_blob_string_const(dn_str);
649 :
650 : /*
651 : * We already have the SID in the token, so set
652 : * 'only childs' flag to true and add all
653 : * groups which match the filter.
654 : */
655 247660 : status = dsdb_expand_nested_groups(sam_ctx, &dn_blob,
656 : true, filter,
657 : user_info_dc,
658 : &user_info_dc->sids,
659 247660 : &user_info_dc->num_sids);
660 247660 : if (!NT_STATUS_IS_OK(status)) {
661 0 : return status;
662 : }
663 : }
664 :
665 36427 : return NT_STATUS_OK;
666 : }
667 :
668 71887 : NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
669 : TALLOC_CTX *mem_ctx, const char *principal,
670 : const char **attrs,
671 : struct ldb_dn **domain_dn,
672 : struct ldb_message **msg)
673 : {
674 : struct ldb_dn *user_dn;
675 : NTSTATUS nt_status;
676 71887 : TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
677 : int ret;
678 :
679 71887 : if (!tmp_ctx) {
680 0 : return NT_STATUS_NO_MEMORY;
681 : }
682 :
683 71887 : nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal,
684 : &user_dn, domain_dn);
685 71887 : if (!NT_STATUS_IS_OK(nt_status)) {
686 2426 : talloc_free(tmp_ctx);
687 2426 : return nt_status;
688 : }
689 :
690 : /* pull the user attributes */
691 69461 : ret = dsdb_search_one(sam_ctx, tmp_ctx, msg, user_dn,
692 : LDB_SCOPE_BASE, attrs,
693 : DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
694 : "(objectClass=*)");
695 69461 : if (ret != LDB_SUCCESS) {
696 0 : talloc_free(tmp_ctx);
697 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
698 : }
699 69461 : talloc_steal(mem_ctx, *msg);
700 69461 : talloc_steal(mem_ctx, *domain_dn);
701 69461 : talloc_free(tmp_ctx);
702 :
703 69461 : return NT_STATUS_OK;
704 : }
705 :
706 : /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available, and for tokenGroups in the DSDB stack.
707 :
708 : Supply either a principal or a DN
709 : */
710 159 : NTSTATUS authsam_get_user_info_dc_principal(TALLOC_CTX *mem_ctx,
711 : struct loadparm_context *lp_ctx,
712 : struct ldb_context *sam_ctx,
713 : const char *principal,
714 : struct ldb_dn *user_dn,
715 : struct auth_user_info_dc **user_info_dc)
716 : {
717 : NTSTATUS nt_status;
718 159 : DATA_BLOB user_sess_key = data_blob(NULL, 0);
719 159 : DATA_BLOB lm_sess_key = data_blob(NULL, 0);
720 :
721 : struct ldb_message *msg;
722 : struct ldb_dn *domain_dn;
723 :
724 159 : TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
725 159 : if (!tmp_ctx) {
726 0 : return NT_STATUS_NO_MEMORY;
727 : }
728 :
729 159 : if (principal) {
730 0 : nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
731 : user_attrs, &domain_dn, &msg);
732 0 : if (!NT_STATUS_IS_OK(nt_status)) {
733 0 : talloc_free(tmp_ctx);
734 0 : return nt_status;
735 : }
736 159 : } else if (user_dn) {
737 : struct dom_sid *user_sid, *domain_sid;
738 : int ret;
739 : /* pull the user attributes */
740 159 : ret = dsdb_search_one(sam_ctx, tmp_ctx, &msg, user_dn,
741 : LDB_SCOPE_BASE, user_attrs,
742 : DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
743 : "(objectClass=*)");
744 159 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
745 0 : talloc_free(tmp_ctx);
746 0 : return NT_STATUS_NO_SUCH_USER;
747 159 : } else if (ret != LDB_SUCCESS) {
748 0 : talloc_free(tmp_ctx);
749 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
750 : }
751 :
752 159 : user_sid = samdb_result_dom_sid(msg, msg, "objectSid");
753 :
754 159 : nt_status = dom_sid_split_rid(tmp_ctx, user_sid, &domain_sid, NULL);
755 159 : if (!NT_STATUS_IS_OK(nt_status)) {
756 0 : return nt_status;
757 : }
758 :
759 159 : domain_dn = samdb_search_dn(sam_ctx, mem_ctx, NULL,
760 : "(&(objectSid=%s)(objectClass=domain))",
761 : ldap_encode_ndr_dom_sid(tmp_ctx, domain_sid));
762 159 : if (!domain_dn) {
763 : struct dom_sid_buf buf;
764 0 : DEBUG(3, ("authsam_get_user_info_dc_principal: Failed to find domain with: SID %s\n",
765 : dom_sid_str_buf(domain_sid, &buf)));
766 0 : return NT_STATUS_NO_SUCH_USER;
767 : }
768 :
769 : } else {
770 0 : return NT_STATUS_INVALID_PARAMETER;
771 : }
772 :
773 159 : nt_status = authsam_make_user_info_dc(tmp_ctx, sam_ctx,
774 : lpcfg_netbios_name(lp_ctx),
775 : lpcfg_sam_name(lp_ctx),
776 : lpcfg_sam_dnsname(lp_ctx),
777 : domain_dn,
778 : msg,
779 : user_sess_key, lm_sess_key,
780 : user_info_dc);
781 159 : if (!NT_STATUS_IS_OK(nt_status)) {
782 0 : talloc_free(tmp_ctx);
783 0 : return nt_status;
784 : }
785 :
786 159 : talloc_steal(mem_ctx, *user_info_dc);
787 159 : talloc_free(tmp_ctx);
788 :
789 159 : return NT_STATUS_OK;
790 : }
791 :
792 : /*
793 : * Returns the details for the Password Settings Object (PSO), if one applies
794 : * the user.
795 : */
796 3503 : static int authsam_get_user_pso(struct ldb_context *sam_ctx,
797 : TALLOC_CTX *mem_ctx,
798 : struct ldb_message *user_msg,
799 : struct ldb_message **pso_msg)
800 : {
801 3503 : const char *attrs[] = { "msDS-LockoutThreshold",
802 : "msDS-LockoutObservationWindow",
803 : NULL };
804 3503 : struct ldb_dn *pso_dn = NULL;
805 3503 : struct ldb_result *res = NULL;
806 : int ret;
807 :
808 : /* check if the user has a PSO that applies to it */
809 3503 : pso_dn = ldb_msg_find_attr_as_dn(sam_ctx, mem_ctx, user_msg,
810 : "msDS-ResultantPSO");
811 :
812 3503 : if (pso_dn != NULL) {
813 25 : ret = dsdb_search_dn(sam_ctx, mem_ctx, &res, pso_dn, attrs, 0);
814 25 : if (ret != LDB_SUCCESS) {
815 0 : return ret;
816 : }
817 :
818 25 : *pso_msg = res->msgs[0];
819 : }
820 :
821 3503 : return LDB_SUCCESS;
822 : }
823 :
824 : /*
825 : * Re-read the bad password and successful logon data for a user.
826 : *
827 : * The DN in the passed user record should contain the "objectGUID" in case the
828 : * object DN has changed.
829 : */
830 29966 : NTSTATUS authsam_reread_user_logon_data(
831 : struct ldb_context *sam_ctx,
832 : TALLOC_CTX *mem_ctx,
833 : const struct ldb_message *user_msg,
834 : struct ldb_message **current)
835 : {
836 29966 : const struct ldb_val *v = NULL;
837 29966 : struct ldb_result *res = NULL;
838 29966 : uint16_t acct_flags = 0;
839 29966 : const char *attr_name = "msDS-User-Account-Control-Computed";
840 :
841 : int ret;
842 :
843 : /*
844 : * Re-read the account details, using the GUID in case the DN
845 : * is being changed (this is automatic in LDB because the
846 : * original search also used DSDB_SEARCH_SHOW_EXTENDED_DN)
847 : *
848 : * We re read all the attributes in user_attrs, rather than using a
849 : * subset to ensure that we can reuse existing validation code.
850 : */
851 29966 : ret = dsdb_search_dn(sam_ctx,
852 : mem_ctx,
853 : &res,
854 29966 : user_msg->dn,
855 : user_attrs,
856 : DSDB_SEARCH_SHOW_EXTENDED_DN);
857 29966 : if (ret != LDB_SUCCESS) {
858 0 : DBG_ERR("Unable to re-read account control data for %s\n",
859 : ldb_dn_get_linearized(user_msg->dn));
860 0 : return NT_STATUS_INTERNAL_ERROR;
861 : }
862 :
863 : /*
864 : * Ensure the account has not been locked out by another request
865 : */
866 29966 : v = ldb_msg_find_ldb_val(res->msgs[0], attr_name);
867 29966 : if (v == NULL || v->data == NULL) {
868 0 : DBG_ERR("No %s attribute for %s\n",
869 : attr_name,
870 : ldb_dn_get_linearized(user_msg->dn));
871 0 : TALLOC_FREE(res);
872 0 : return NT_STATUS_INTERNAL_ERROR;
873 : }
874 29966 : acct_flags = samdb_result_acct_flags(res->msgs[0], attr_name);
875 29966 : if (acct_flags & ACB_AUTOLOCK) {
876 0 : DBG_WARNING(
877 : "Account for user %s was locked out.\n",
878 : ldb_dn_get_linearized(user_msg->dn));
879 0 : TALLOC_FREE(res);
880 0 : return NT_STATUS_ACCOUNT_LOCKED_OUT;
881 : }
882 29966 : *current = talloc_steal(mem_ctx, res->msgs[0]);
883 29966 : TALLOC_FREE(res);
884 29966 : return NT_STATUS_OK;
885 : }
886 :
887 72961 : static struct db_context *authsam_get_bad_password_db(
888 : TALLOC_CTX *mem_ctx,
889 : struct ldb_context *sam_ctx)
890 : {
891 72961 : struct loadparm_context *lp_ctx = NULL;
892 72961 : const char *db_name = "bad_password";
893 72961 : struct db_context *db_ctx = NULL;
894 :
895 72961 : lp_ctx = ldb_get_opaque(sam_ctx, "loadparm");
896 72961 : if (lp_ctx == NULL) {
897 0 : DBG_ERR("Unable to get loadparm_context\n");
898 0 : return NULL;
899 : }
900 :
901 72961 : db_ctx = cluster_db_tmp_open(mem_ctx, lp_ctx, db_name, TDB_DEFAULT);
902 72961 : if (db_ctx == NULL) {
903 0 : DBG_ERR("Unable to open bad password attempts database\n");
904 0 : return NULL;
905 : }
906 72961 : return db_ctx;
907 : }
908 :
909 72961 : static NTSTATUS get_object_sid_as_tdb_data(
910 : TALLOC_CTX *mem_ctx,
911 : const struct ldb_message *msg,
912 : struct dom_sid_buf *buf,
913 : TDB_DATA *key)
914 : {
915 72961 : struct dom_sid *objectsid = NULL;
916 :
917 : /*
918 : * Convert the objectSID to a human readable form to
919 : * make debugging easier
920 : */
921 72961 : objectsid = samdb_result_dom_sid(mem_ctx, msg, "objectSID");
922 72961 : if (objectsid == NULL) {
923 0 : DBG_ERR("Unable to extract objectSID\n");
924 0 : return NT_STATUS_INTERNAL_ERROR;
925 : }
926 72961 : dom_sid_str_buf(objectsid, buf);
927 72961 : key->dptr = (unsigned char *)buf->buf;
928 72961 : key->dsize = strlen(buf->buf);
929 :
930 72961 : talloc_free(objectsid);
931 :
932 72961 : return NT_STATUS_OK;
933 : }
934 :
935 : /*
936 : * Add the users objectSID to the bad password attempt database
937 : * to indicate that last authentication failed due to a bad password
938 : */
939 521 : static NTSTATUS authsam_set_bad_password_indicator(
940 : struct ldb_context *sam_ctx,
941 : TALLOC_CTX *mem_ctx,
942 : const struct ldb_message *msg)
943 : {
944 521 : NTSTATUS status = NT_STATUS_OK;
945 : struct dom_sid_buf buf;
946 521 : TDB_DATA key = {0};
947 521 : TDB_DATA value = {0};
948 521 : struct db_context *db = NULL;
949 :
950 521 : TALLOC_CTX *ctx = talloc_new(mem_ctx);
951 521 : if (ctx == NULL) {
952 0 : return NT_STATUS_NO_MEMORY;
953 : }
954 :
955 521 : db = authsam_get_bad_password_db(ctx, sam_ctx);
956 521 : if (db == NULL) {
957 0 : status = NT_STATUS_INTERNAL_ERROR;
958 0 : goto exit;
959 : }
960 :
961 521 : status = get_object_sid_as_tdb_data(ctx, msg, &buf, &key);
962 521 : if (!NT_STATUS_IS_OK(status)) {
963 0 : goto exit;
964 : }
965 :
966 521 : status = dbwrap_store(db, key, value, 0);
967 521 : if (!NT_STATUS_IS_OK(status)) {
968 0 : DBG_ERR("Unable to store bad password indicator\n");
969 : }
970 521 : exit:
971 521 : talloc_free(ctx);
972 521 : return status;
973 : }
974 :
975 : /*
976 : * see if the users objectSID is in the bad password attempt database
977 : */
978 36220 : static NTSTATUS authsam_check_bad_password_indicator(
979 : struct ldb_context *sam_ctx,
980 : TALLOC_CTX *mem_ctx,
981 : bool *exists,
982 : const struct ldb_message *msg)
983 : {
984 36220 : NTSTATUS status = NT_STATUS_OK;
985 : struct dom_sid_buf buf;
986 36220 : TDB_DATA key = {0};
987 36220 : struct db_context *db = NULL;
988 :
989 36220 : TALLOC_CTX *ctx = talloc_new(mem_ctx);
990 36220 : if (ctx == NULL) {
991 0 : return NT_STATUS_NO_MEMORY;
992 : }
993 :
994 36220 : db = authsam_get_bad_password_db(ctx, sam_ctx);
995 36220 : if (db == NULL) {
996 0 : status = NT_STATUS_INTERNAL_ERROR;
997 0 : goto exit;
998 : }
999 :
1000 36220 : status = get_object_sid_as_tdb_data(ctx, msg, &buf, &key);
1001 36220 : if (!NT_STATUS_IS_OK(status)) {
1002 0 : goto exit;
1003 : }
1004 :
1005 36220 : *exists = dbwrap_exists(db, key);
1006 36220 : exit:
1007 36220 : talloc_free(ctx);
1008 36220 : return status;
1009 : }
1010 :
1011 : /*
1012 : * Remove the users objectSID to the bad password attempt database
1013 : * to indicate that last authentication succeeded.
1014 : */
1015 36220 : static NTSTATUS authsam_clear_bad_password_indicator(
1016 : struct ldb_context *sam_ctx,
1017 : TALLOC_CTX *mem_ctx,
1018 : const struct ldb_message *msg)
1019 : {
1020 36220 : NTSTATUS status = NT_STATUS_OK;
1021 : struct dom_sid_buf buf;
1022 36220 : TDB_DATA key = {0};
1023 36220 : struct db_context *db = NULL;
1024 :
1025 36220 : TALLOC_CTX *ctx = talloc_new(mem_ctx);
1026 36220 : if (ctx == NULL) {
1027 0 : return NT_STATUS_NO_MEMORY;
1028 : }
1029 :
1030 36220 : db = authsam_get_bad_password_db(ctx, sam_ctx);
1031 36220 : if (db == NULL) {
1032 0 : status = NT_STATUS_INTERNAL_ERROR;
1033 0 : goto exit;
1034 : }
1035 :
1036 36220 : status = get_object_sid_as_tdb_data(ctx, msg, &buf, &key);
1037 36220 : if (!NT_STATUS_IS_OK(status)) {
1038 0 : goto exit;
1039 : }
1040 :
1041 36220 : status = dbwrap_delete(db, key);
1042 36220 : if (NT_STATUS_EQUAL(NT_STATUS_NOT_FOUND, status)) {
1043 : /*
1044 : * Ok there was no bad password indicator this is expected
1045 : */
1046 35886 : status = NT_STATUS_OK;
1047 : }
1048 36220 : if (NT_STATUS_IS_ERR(status)) {
1049 0 : DBG_ERR("Unable to delete bad password indicator, %s %s\n",
1050 : nt_errstr(status),
1051 : get_friendly_nt_error_msg(status));
1052 : }
1053 36220 : exit:
1054 36220 : talloc_free(ctx);
1055 36220 : return status;
1056 : }
1057 :
1058 3503 : NTSTATUS authsam_update_bad_pwd_count(struct ldb_context *sam_ctx,
1059 : struct ldb_message *msg,
1060 : struct ldb_dn *domain_dn)
1061 : {
1062 3503 : const char *attrs[] = { "lockoutThreshold",
1063 : "lockOutObservationWindow",
1064 : "lockoutDuration",
1065 : "pwdProperties",
1066 : NULL };
1067 : int ret;
1068 : NTSTATUS status;
1069 : struct ldb_result *domain_res;
1070 3503 : struct ldb_message *msg_mod = NULL;
1071 3503 : struct ldb_message *current = NULL;
1072 3503 : struct ldb_message *pso_msg = NULL;
1073 3503 : bool txn_active = false;
1074 : TALLOC_CTX *mem_ctx;
1075 :
1076 3503 : mem_ctx = talloc_new(msg);
1077 3503 : if (mem_ctx == NULL) {
1078 0 : return NT_STATUS_NO_MEMORY;
1079 : }
1080 :
1081 3503 : ret = dsdb_search_dn(sam_ctx, mem_ctx, &domain_res, domain_dn, attrs, 0);
1082 3503 : if (ret != LDB_SUCCESS) {
1083 0 : TALLOC_FREE(mem_ctx);
1084 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
1085 : }
1086 :
1087 3503 : ret = authsam_get_user_pso(sam_ctx, mem_ctx, msg, &pso_msg);
1088 3503 : if (ret != LDB_SUCCESS) {
1089 :
1090 : /*
1091 : * fallback to using the domain defaults so that we still
1092 : * record the bad password attempt
1093 : */
1094 0 : DBG_ERR("Error (%d) checking PSO for %s\n",
1095 : ret, ldb_dn_get_linearized(msg->dn));
1096 : }
1097 :
1098 : /*
1099 : * To ensure that the bad password count is updated atomically,
1100 : * we need to:
1101 : * begin a transaction
1102 : * re-read the account details,
1103 : * using the <GUID= part of the DN
1104 : * update the bad password count
1105 : * commit the transaction.
1106 : */
1107 :
1108 : /*
1109 : * Start a new transaction
1110 : */
1111 3503 : ret = ldb_transaction_start(sam_ctx);
1112 3503 : if (ret != LDB_SUCCESS) {
1113 0 : status = NT_STATUS_INTERNAL_ERROR;
1114 0 : goto error;
1115 : }
1116 3503 : txn_active = true;
1117 :
1118 : /*
1119 : * Re-read the account details, using the GUID in case the DN
1120 : * is being changed.
1121 : */
1122 3503 : status = authsam_reread_user_logon_data(
1123 : sam_ctx, mem_ctx, msg, ¤t);
1124 3503 : if (!NT_STATUS_IS_OK(status)) {
1125 : /* The re-read can return account locked out, as well
1126 : * as an internal error
1127 : */
1128 0 : if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
1129 : /*
1130 : * For NT_STATUS_ACCOUNT_LOCKED_OUT we want to commit
1131 : * the transaction. Again to avoid cluttering the
1132 : * audit logs with spurious errors
1133 : */
1134 0 : goto exit;
1135 : }
1136 0 : goto error;
1137 : }
1138 :
1139 : /*
1140 : * Update the bad password count and if required lock the account
1141 : */
1142 3503 : status = dsdb_update_bad_pwd_count(
1143 : mem_ctx,
1144 : sam_ctx,
1145 : current,
1146 3503 : domain_res->msgs[0],
1147 : pso_msg,
1148 : &msg_mod);
1149 3503 : if (!NT_STATUS_IS_OK(status)) {
1150 0 : status = NT_STATUS_INTERNAL_ERROR;
1151 0 : goto error;
1152 : }
1153 :
1154 : /*
1155 : * Write the data back to disk if required.
1156 : */
1157 3503 : if (msg_mod != NULL) {
1158 : struct ldb_request *req;
1159 :
1160 521 : ret = ldb_build_mod_req(&req, sam_ctx, sam_ctx,
1161 : msg_mod,
1162 : NULL,
1163 : NULL,
1164 : ldb_op_default_callback,
1165 : NULL);
1166 521 : if (ret != LDB_SUCCESS) {
1167 0 : TALLOC_FREE(msg_mod);
1168 0 : status = NT_STATUS_INTERNAL_ERROR;
1169 0 : goto error;
1170 : }
1171 :
1172 521 : ret = ldb_request_add_control(req,
1173 : DSDB_CONTROL_FORCE_RODC_LOCAL_CHANGE,
1174 : false, NULL);
1175 521 : if (ret != LDB_SUCCESS) {
1176 0 : talloc_free(req);
1177 0 : status = NT_STATUS_INTERNAL_ERROR;
1178 0 : goto error;
1179 : }
1180 :
1181 : /*
1182 : * As we're in a transaction, make the ldb request directly
1183 : * to avoid the nested transaction that would result if we
1184 : * called dsdb_autotransaction_request
1185 : */
1186 521 : ret = ldb_request(sam_ctx, req);
1187 521 : if (ret == LDB_SUCCESS) {
1188 521 : ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1189 : }
1190 521 : talloc_free(req);
1191 521 : if (ret != LDB_SUCCESS) {
1192 0 : status = NT_STATUS_INTERNAL_ERROR;
1193 0 : goto error;
1194 : }
1195 521 : status = authsam_set_bad_password_indicator(
1196 : sam_ctx, mem_ctx, msg);
1197 521 : if (!NT_STATUS_IS_OK(status)) {
1198 0 : goto error;
1199 : }
1200 : }
1201 : /*
1202 : * Note that we may not have updated the user record, but
1203 : * committing the transaction in that case is still the correct
1204 : * thing to do.
1205 : * If the transaction was cancelled, this would be logged by
1206 : * the dsdb audit log as a failure. When in fact it is expected
1207 : * behaviour.
1208 : */
1209 2982 : exit:
1210 3503 : TALLOC_FREE(mem_ctx);
1211 3503 : ret = ldb_transaction_commit(sam_ctx);
1212 3503 : if (ret != LDB_SUCCESS) {
1213 0 : DBG_ERR("Error (%d) %s, committing transaction,"
1214 : " while updating bad password count"
1215 : " for (%s)\n",
1216 : ret,
1217 : ldb_errstring(sam_ctx),
1218 : ldb_dn_get_linearized(msg->dn));
1219 0 : return NT_STATUS_INTERNAL_ERROR;
1220 : }
1221 3503 : return status;
1222 :
1223 0 : error:
1224 0 : DBG_ERR("Failed to update badPwdCount, badPasswordTime or "
1225 : "set lockoutTime on %s: %s\n",
1226 : ldb_dn_get_linearized(msg->dn),
1227 : ldb_errstring(sam_ctx) != NULL ?
1228 : ldb_errstring(sam_ctx) :nt_errstr(status));
1229 0 : if (txn_active) {
1230 0 : ret = ldb_transaction_cancel(sam_ctx);
1231 0 : if (ret != LDB_SUCCESS) {
1232 0 : DBG_ERR("Error rolling back transaction,"
1233 : " while updating bad password count"
1234 : " on %s: %s\n",
1235 : ldb_dn_get_linearized(msg->dn),
1236 : ldb_errstring(sam_ctx));
1237 : }
1238 : }
1239 0 : TALLOC_FREE(mem_ctx);
1240 0 : return status;
1241 :
1242 : }
1243 :
1244 : /*
1245 : * msDS-LogonTimeSyncInterval is an int32_t number of days.
1246 : *
1247 : * The docs say: "the initial update, after the domain functional
1248 : * level is raised to DS_BEHAVIOR_WIN2003 or higher, is calculated as
1249 : * 14 days minus a random percentage of 5 days", but we aren't doing
1250 : * that. The blogosphere seems to think that this randomised update
1251 : * happens everytime, but [MS-ADA1] doesn't agree.
1252 : *
1253 : * Dochelp referred us to the following blog post:
1254 : * http://blogs.technet.com/b/askds/archive/2009/04/15/the-lastlogontimestamp-attribute-what-it-was-designed-for-and-how-it-works.aspx
1255 : *
1256 : * when msDS-LogonTimeSyncInterval is zero, the lastLogonTimestamp is
1257 : * not changed.
1258 : */
1259 :
1260 35606 : static NTSTATUS authsam_calculate_lastlogon_sync_interval(
1261 : struct ldb_context *sam_ctx,
1262 : TALLOC_CTX *ctx,
1263 : struct ldb_dn *domain_dn,
1264 : NTTIME *sync_interval_nt)
1265 : {
1266 : static const char *attrs[] = { "msDS-LogonTimeSyncInterval",
1267 : NULL };
1268 : int ret;
1269 35606 : struct ldb_result *domain_res = NULL;
1270 35606 : TALLOC_CTX *mem_ctx = NULL;
1271 : uint32_t sync_interval;
1272 :
1273 35606 : mem_ctx = talloc_new(ctx);
1274 35606 : if (mem_ctx == NULL) {
1275 0 : return NT_STATUS_NO_MEMORY;
1276 : }
1277 :
1278 35606 : ret = dsdb_search_dn(sam_ctx, mem_ctx, &domain_res, domain_dn, attrs,
1279 : 0);
1280 35606 : if (ret != LDB_SUCCESS || domain_res->count != 1) {
1281 0 : TALLOC_FREE(mem_ctx);
1282 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
1283 : }
1284 :
1285 35606 : sync_interval = ldb_msg_find_attr_as_int(domain_res->msgs[0],
1286 : "msDS-LogonTimeSyncInterval",
1287 : 14);
1288 35606 : DEBUG(5, ("sync interval is %d\n", sync_interval));
1289 35606 : if (sync_interval >= 5){
1290 : /*
1291 : * Subtract "a random percentage of 5" days. Presumably this
1292 : * percentage is between 0 and 100, and modulus is accurate
1293 : * enough.
1294 : */
1295 35606 : uint32_t r = generate_random() % 6;
1296 35606 : sync_interval -= r;
1297 35606 : DBG_INFO("randomised sync interval is %d (-%d)\n", sync_interval, r);
1298 : }
1299 : /* In the case where sync_interval < 5 there is no randomisation */
1300 :
1301 : /*
1302 : * msDS-LogonTimeSyncInterval is an int32_t number of days,
1303 : * while lastLogonTimestamp (to be updated) is in the 64 bit
1304 : * 100ns NTTIME format so we must convert.
1305 : */
1306 35606 : *sync_interval_nt = sync_interval * 24LL * 3600LL * 10000000LL;
1307 35606 : TALLOC_FREE(mem_ctx);
1308 35606 : return NT_STATUS_OK;
1309 : }
1310 :
1311 :
1312 : /*
1313 : * We only set lastLogonTimestamp if the current value is older than
1314 : * now - msDS-LogonTimeSyncInterval days.
1315 : *
1316 : * lastLogonTimestamp is in the 64 bit 100ns NTTIME format
1317 : */
1318 60994 : static NTSTATUS authsam_update_lastlogon_timestamp(struct ldb_context *sam_ctx,
1319 : struct ldb_message *msg_mod,
1320 : struct ldb_dn *domain_dn,
1321 : NTTIME old_timestamp,
1322 : NTTIME now,
1323 : NTTIME sync_interval_nt)
1324 : {
1325 : int ret;
1326 60994 : DEBUG(5, ("old timestamp is %lld, threshold %lld, diff %lld\n",
1327 : (long long int)old_timestamp,
1328 : (long long int)(now - sync_interval_nt),
1329 : (long long int)(old_timestamp - now + sync_interval_nt)));
1330 :
1331 60994 : if (sync_interval_nt == 0){
1332 : /*
1333 : * Setting msDS-LogonTimeSyncInterval to zero is how you ask
1334 : * that nothing happens here.
1335 : */
1336 0 : return NT_STATUS_OK;
1337 : }
1338 60994 : if (old_timestamp > now){
1339 0 : DEBUG(0, ("lastLogonTimestamp is in the future! (%lld > %lld)\n",
1340 : (long long int)old_timestamp, (long long int)now));
1341 : /* then what? */
1342 :
1343 60994 : } else if (old_timestamp < now - sync_interval_nt){
1344 15987 : DEBUG(5, ("updating lastLogonTimestamp to %lld\n",
1345 : (long long int)now));
1346 :
1347 : /* The time has come to update lastLogonTimestamp */
1348 15987 : ret = samdb_msg_add_int64(sam_ctx, msg_mod, msg_mod,
1349 : "lastLogonTimestamp", now);
1350 :
1351 15987 : if (ret != LDB_SUCCESS) {
1352 0 : return NT_STATUS_NO_MEMORY;
1353 : }
1354 : }
1355 60994 : return NT_STATUS_OK;
1356 : }
1357 :
1358 : /****************************************************************************
1359 : Look for the specified user in the sam, return ldb result structures
1360 : ****************************************************************************/
1361 :
1362 23698 : NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
1363 : const char *account_name,
1364 : struct ldb_dn *domain_dn,
1365 : struct ldb_message **ret_msg)
1366 : {
1367 : int ret;
1368 :
1369 : /* pull the user attributes */
1370 23698 : ret = dsdb_search_one(sam_ctx, mem_ctx, ret_msg, domain_dn, LDB_SCOPE_SUBTREE,
1371 : user_attrs,
1372 : DSDB_SEARCH_SHOW_EXTENDED_DN,
1373 : "(&(sAMAccountName=%s)(objectclass=user))",
1374 : ldb_binary_encode_string(mem_ctx, account_name));
1375 23698 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1376 811 : DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb, under %s\n",
1377 : account_name, ldb_dn_get_linearized(domain_dn)));
1378 811 : return NT_STATUS_NO_SUCH_USER;
1379 : }
1380 22887 : if (ret != LDB_SUCCESS) {
1381 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
1382 : }
1383 :
1384 22887 : return NT_STATUS_OK;
1385 : }
1386 :
1387 :
1388 : /* Reset the badPwdCount to zero and update the lastLogon time. */
1389 36220 : NTSTATUS authsam_logon_success_accounting(struct ldb_context *sam_ctx,
1390 : const struct ldb_message *msg,
1391 : struct ldb_dn *domain_dn,
1392 : bool interactive_or_kerberos,
1393 : TALLOC_CTX *send_to_sam_mem_ctx,
1394 : struct netr_SendToSamBase **send_to_sam)
1395 : {
1396 : int ret;
1397 : NTSTATUS status;
1398 : int badPwdCount;
1399 : int dbBadPwdCount;
1400 : int64_t lockoutTime;
1401 : struct ldb_message *msg_mod;
1402 : TALLOC_CTX *mem_ctx;
1403 : struct timeval tv_now;
1404 : NTTIME now;
1405 : NTTIME lastLogonTimestamp;
1406 : int64_t lockOutObservationWindow;
1407 36220 : NTTIME sync_interval_nt = 0;
1408 36220 : bool am_rodc = false;
1409 36220 : bool txn_active = false;
1410 : bool need_db_reread;
1411 :
1412 36220 : mem_ctx = talloc_new(msg);
1413 36220 : if (mem_ctx == NULL) {
1414 0 : return NT_STATUS_NO_MEMORY;
1415 : }
1416 :
1417 : /*
1418 : * Any update of the last logon data, needs to be done inside a
1419 : * transaction.
1420 : * And the user data needs to be re-read, and the account re-checked
1421 : * for lockout.
1422 : *
1423 : * Howevver we have long-running transactions like replication
1424 : * that could otherwise grind the system to a halt so we first
1425 : * determine if *this* account has seen a bad password,
1426 : * otherwise we only start a transaction if there was a need
1427 : * (because a change was to be made).
1428 : */
1429 :
1430 36220 : status = authsam_check_bad_password_indicator(
1431 : sam_ctx, mem_ctx, &need_db_reread, msg);
1432 36220 : if (!NT_STATUS_IS_OK(status)) {
1433 0 : return status;
1434 : }
1435 :
1436 36220 : if (interactive_or_kerberos == false) {
1437 : /*
1438 : * Avoid calculating this twice, it reads the PSO. A
1439 : * race on this is unimportant.
1440 : */
1441 : lockOutObservationWindow
1442 17537 : = samdb_result_msds_LockoutObservationWindow(
1443 : sam_ctx, mem_ctx, domain_dn, msg);
1444 : }
1445 :
1446 36220 : ret = samdb_rodc(sam_ctx, &am_rodc);
1447 36220 : if (ret != LDB_SUCCESS) {
1448 0 : status = NT_STATUS_INTERNAL_ERROR;
1449 0 : goto error;
1450 : }
1451 :
1452 36220 : if (!am_rodc) {
1453 : /*
1454 : * Avoid reading the main domain DN twice. A race on
1455 : * this is unimportant.
1456 : */
1457 35606 : status = authsam_calculate_lastlogon_sync_interval(
1458 : sam_ctx, mem_ctx, domain_dn, &sync_interval_nt);
1459 :
1460 35606 : if (!NT_STATUS_IS_OK(status)) {
1461 0 : status = NT_STATUS_INTERNAL_ERROR;
1462 0 : goto error;
1463 : }
1464 : }
1465 :
1466 36220 : get_transaction:
1467 :
1468 62079 : if (need_db_reread) {
1469 26193 : struct ldb_message *current = NULL;
1470 :
1471 : /*
1472 : * Start a new transaction
1473 : */
1474 26193 : ret = ldb_transaction_start(sam_ctx);
1475 26193 : if (ret != LDB_SUCCESS) {
1476 0 : status = NT_STATUS_INTERNAL_ERROR;
1477 0 : goto error;
1478 : }
1479 :
1480 26193 : txn_active = true;
1481 :
1482 : /*
1483 : * Re-read the account details, using the GUID
1484 : * embedded in DN so this is safe against a race where
1485 : * it is being renamed.
1486 : */
1487 26193 : status = authsam_reread_user_logon_data(
1488 : sam_ctx, mem_ctx, msg, ¤t);
1489 26193 : if (!NT_STATUS_IS_OK(status)) {
1490 : /*
1491 : * The re-read can return account locked out, as well
1492 : * as an internal error
1493 : */
1494 0 : if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
1495 : /*
1496 : * For NT_STATUS_ACCOUNT_LOCKED_OUT we want to commit
1497 : * the transaction. Again to avoid cluttering the
1498 : * audit logs with spurious errors
1499 : */
1500 0 : goto exit;
1501 : }
1502 0 : goto error;
1503 : }
1504 26193 : msg = current;
1505 : }
1506 :
1507 62079 : lockoutTime = ldb_msg_find_attr_as_int64(msg, "lockoutTime", 0);
1508 62079 : dbBadPwdCount = ldb_msg_find_attr_as_int(msg, "badPwdCount", 0);
1509 62079 : tv_now = timeval_current();
1510 62079 : now = timeval_to_nttime(&tv_now);
1511 :
1512 62079 : if (interactive_or_kerberos) {
1513 37233 : badPwdCount = dbBadPwdCount;
1514 : } else {
1515 : /*
1516 : * We get lockOutObservationWindow above, before the
1517 : * transaction
1518 : */
1519 24846 : badPwdCount = dsdb_effective_badPwdCount(
1520 : msg, lockOutObservationWindow, now);
1521 : }
1522 62079 : lastLogonTimestamp =
1523 62079 : ldb_msg_find_attr_as_int64(msg, "lastLogonTimestamp", 0);
1524 :
1525 62079 : DEBUG(5, ("lastLogonTimestamp is %lld\n",
1526 : (long long int)lastLogonTimestamp));
1527 :
1528 62079 : msg_mod = ldb_msg_new(mem_ctx);
1529 62079 : if (msg_mod == NULL) {
1530 0 : status = NT_STATUS_NO_MEMORY;
1531 0 : goto error;
1532 : }
1533 :
1534 : /*
1535 : * By using the DN from msg->dn directly, we allow LDB to
1536 : * prefer the embedded GUID form, so this is actually quite
1537 : * safe even in the case where DN has been changed
1538 : */
1539 62079 : msg_mod->dn = msg->dn;
1540 :
1541 62079 : if (lockoutTime != 0) {
1542 : /*
1543 : * This implies "badPwdCount" = 0, see samldb_lockout_time()
1544 : */
1545 36 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod, "lockoutTime", 0);
1546 36 : if (ret != LDB_SUCCESS) {
1547 0 : status = NT_STATUS_NO_MEMORY;
1548 0 : goto error;
1549 : }
1550 62043 : } else if (badPwdCount != 0) {
1551 304 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod, "badPwdCount", 0);
1552 304 : if (ret != LDB_SUCCESS) {
1553 0 : status = NT_STATUS_NO_MEMORY;
1554 0 : goto error;
1555 : }
1556 : }
1557 :
1558 62079 : if (interactive_or_kerberos ||
1559 185 : (badPwdCount != 0 && lockoutTime == 0)) {
1560 37418 : ret = samdb_msg_add_int64(sam_ctx, msg_mod, msg_mod,
1561 : "lastLogon", now);
1562 37418 : if (ret != LDB_SUCCESS) {
1563 0 : status = NT_STATUS_NO_MEMORY;
1564 0 : goto error;
1565 : }
1566 : }
1567 :
1568 62079 : if (interactive_or_kerberos) {
1569 : int logonCount;
1570 :
1571 37233 : logonCount = ldb_msg_find_attr_as_int(msg, "logonCount", 0);
1572 :
1573 37233 : logonCount += 1;
1574 :
1575 37233 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod,
1576 : "logonCount", logonCount);
1577 37233 : if (ret != LDB_SUCCESS) {
1578 0 : status = NT_STATUS_NO_MEMORY;
1579 0 : goto error;
1580 : }
1581 : } else {
1582 : /* Set an unset logonCount to 0 on first successful login */
1583 24846 : if (ldb_msg_find_ldb_val(msg, "logonCount") == NULL) {
1584 34 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod,
1585 : "logonCount", 0);
1586 34 : if (ret != LDB_SUCCESS) {
1587 0 : TALLOC_FREE(mem_ctx);
1588 0 : return NT_STATUS_NO_MEMORY;
1589 : }
1590 : }
1591 : }
1592 :
1593 62079 : if (!am_rodc) {
1594 60994 : status = authsam_update_lastlogon_timestamp(
1595 : sam_ctx,
1596 : msg_mod,
1597 : domain_dn,
1598 : lastLogonTimestamp,
1599 : now,
1600 : sync_interval_nt);
1601 60994 : if (!NT_STATUS_IS_OK(status)) {
1602 0 : status = NT_STATUS_NO_MEMORY;
1603 0 : goto error;
1604 : }
1605 : } else {
1606 : /* Perform the (async) SendToSAM calls for MS-SAMS */
1607 1085 : if (dbBadPwdCount != 0 && send_to_sam != NULL) {
1608 : struct netr_SendToSamBase *base_msg;
1609 17 : struct GUID guid = samdb_result_guid(msg, "objectGUID");
1610 :
1611 17 : base_msg = talloc_zero(send_to_sam_mem_ctx,
1612 : struct netr_SendToSamBase);
1613 17 : if (base_msg == NULL) {
1614 0 : status = NT_STATUS_NO_MEMORY;
1615 0 : goto error;
1616 : }
1617 :
1618 17 : base_msg->message_type = SendToSamResetBadPasswordCount;
1619 17 : base_msg->message_size = 16;
1620 17 : base_msg->message.reset_bad_password.guid = guid;
1621 17 : *send_to_sam = base_msg;
1622 : }
1623 : }
1624 :
1625 62079 : if (msg_mod->num_elements > 0) {
1626 : unsigned int i;
1627 : struct ldb_request *req;
1628 :
1629 : /*
1630 : * If it turns out we are going to update the DB, go
1631 : * back to the start, get a transaction and the
1632 : * current DB state and try again
1633 : */
1634 52052 : if (txn_active == false) {
1635 25859 : need_db_reread = true;
1636 25859 : goto get_transaction;
1637 : }
1638 :
1639 : /* mark all the message elements as LDB_FLAG_MOD_REPLACE */
1640 72214 : for (i=0;i<msg_mod->num_elements;i++) {
1641 46021 : msg_mod->elements[i].flags = LDB_FLAG_MOD_REPLACE;
1642 : }
1643 :
1644 26193 : ret = ldb_build_mod_req(&req, sam_ctx, sam_ctx,
1645 : msg_mod,
1646 : NULL,
1647 : NULL,
1648 : ldb_op_default_callback,
1649 : NULL);
1650 26193 : if (ret != LDB_SUCCESS) {
1651 0 : status = NT_STATUS_INTERNAL_ERROR;
1652 0 : goto error;
1653 : }
1654 :
1655 26193 : ret = ldb_request_add_control(req,
1656 : DSDB_CONTROL_FORCE_RODC_LOCAL_CHANGE,
1657 : false, NULL);
1658 26193 : if (ret != LDB_SUCCESS) {
1659 0 : TALLOC_FREE(req);
1660 0 : status = NT_STATUS_INTERNAL_ERROR;
1661 0 : goto error;
1662 : }
1663 : /*
1664 : * As we're in a transaction, make the ldb request directly
1665 : * to avoid the nested transaction that would result if we
1666 : * called dsdb_autotransaction_request
1667 : */
1668 26193 : ret = ldb_request(sam_ctx, req);
1669 26193 : if (ret == LDB_SUCCESS) {
1670 26193 : ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1671 : }
1672 26193 : TALLOC_FREE(req);
1673 26193 : if (ret != LDB_SUCCESS) {
1674 0 : status = NT_STATUS_INTERNAL_ERROR;
1675 0 : goto error;
1676 : }
1677 : }
1678 36220 : status = authsam_clear_bad_password_indicator(sam_ctx, mem_ctx, msg);
1679 36220 : if (!NT_STATUS_IS_OK(status)) {
1680 0 : goto error;
1681 : }
1682 :
1683 : /*
1684 : * Note that we may not have updated the user record, but
1685 : * committing the transaction in that case is still the correct
1686 : * thing to do.
1687 : * If the transaction was cancelled, this would be logged by
1688 : * the dsdb audit log as a failure. When in fact it is expected
1689 : * behaviour.
1690 : *
1691 : * Thankfully both TDB and LMDB seem to optimise for the empty
1692 : * transaction case
1693 : */
1694 36220 : exit:
1695 36220 : TALLOC_FREE(mem_ctx);
1696 :
1697 36220 : if (txn_active == false) {
1698 10027 : return status;
1699 : }
1700 :
1701 26193 : ret = ldb_transaction_commit(sam_ctx);
1702 26193 : if (ret != LDB_SUCCESS) {
1703 0 : DBG_ERR("Error (%d) %s, committing transaction,"
1704 : " while updating successful logon accounting"
1705 : " for (%s)\n",
1706 : ret,
1707 : ldb_errstring(sam_ctx),
1708 : ldb_dn_get_linearized(msg->dn));
1709 0 : return NT_STATUS_INTERNAL_ERROR;
1710 : }
1711 26193 : return status;
1712 :
1713 0 : error:
1714 0 : DBG_ERR("Failed to update badPwdCount, badPasswordTime or "
1715 : "set lockoutTime on %s: %s\n",
1716 : ldb_dn_get_linearized(msg->dn),
1717 : ldb_errstring(sam_ctx) != NULL ?
1718 : ldb_errstring(sam_ctx) :nt_errstr(status));
1719 0 : if (txn_active) {
1720 0 : ret = ldb_transaction_cancel(sam_ctx);
1721 0 : if (ret != LDB_SUCCESS) {
1722 0 : DBG_ERR("Error rolling back transaction,"
1723 : " while updating bad password count"
1724 : " on %s: %s\n",
1725 : ldb_dn_get_linearized(msg->dn),
1726 : ldb_errstring(sam_ctx));
1727 : }
1728 : }
1729 0 : TALLOC_FREE(mem_ctx);
1730 0 : return status;
1731 : }
|
