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 34414 : 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 34414 : hours = ldb_msg_find_ldb_val(msg, "logonHours");
138 34414 : if (!hours) {
139 34414 : DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs));
140 34414 : 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 35034 : _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 35034 : struct timeval tv_now = timeval_current();
203 35034 : NTTIME now = timeval_to_nttime(&tv_now);
204 :
205 35034 : DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
206 :
207 35034 : acct_flags = samdb_result_acct_flags(msg, "msDS-User-Account-Control-Computed");
208 :
209 35034 : 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 35034 : must_change_time = samdb_result_nttime(msg,
214 : "msDS-UserPasswordExpiryTimeComputed", 0);
215 :
216 35034 : workstation_list = ldb_msg_find_attr_as_string(msg, "userWorkstations", NULL);
217 :
218 : /* Quit if the account was disabled. */
219 35034 : 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 34768 : 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 34768 : 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 34768 : 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 34757 : 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 34757 : 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 34414 : if (!logon_hours_ok(msg, name_for_logs)) {
278 0 : return NT_STATUS_INVALID_LOGON_HOURS;
279 : }
280 :
281 34414 : if (!allow_domain_trust) {
282 16005 : 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 34414 : 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 34414 : 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 34072 : return NT_STATUS_OK;
303 : }
304 :
305 88435 : static NTSTATUS authsam_domain_group_filter(TALLOC_CTX *mem_ctx,
306 : char **_filter)
307 : {
308 88435 : char *filter = NULL;
309 :
310 88435 : *_filter = NULL;
311 :
312 88435 : filter = talloc_strdup(mem_ctx, "(&(objectClass=group)");
313 88435 : if (filter == NULL) {
314 0 : return NT_STATUS_NO_MEMORY;
315 : }
316 :
317 : /*
318 : * Skip all builtin groups, they're added later.
319 : */
320 88435 : filter = talloc_asprintf_append_buffer(filter,
321 : "(!(groupType:1.2.840.113556.1.4.803:=%u))",
322 : GROUP_TYPE_BUILTIN_LOCAL_GROUP);
323 88435 : if (filter == NULL) {
324 0 : return NT_STATUS_NO_MEMORY;
325 : }
326 : /*
327 : * Only include security groups.
328 : */
329 88435 : filter = talloc_asprintf_append_buffer(filter,
330 : "(groupType:1.2.840.113556.1.4.803:=%u))",
331 : GROUP_TYPE_SECURITY_ENABLED);
332 88435 : if (filter == NULL) {
333 0 : return NT_STATUS_NO_MEMORY;
334 : }
335 :
336 88435 : *_filter = filter;
337 88435 : return NT_STATUS_OK;
338 : }
339 :
340 52180 : _PUBLIC_ NTSTATUS authsam_make_user_info_dc(TALLOC_CTX *mem_ctx,
341 : struct ldb_context *sam_ctx,
342 : const char *netbios_name,
343 : const char *domain_name,
344 : const char *dns_domain_name,
345 : struct ldb_dn *domain_dn,
346 : struct ldb_message *msg,
347 : DATA_BLOB user_sess_key,
348 : DATA_BLOB lm_sess_key,
349 : struct auth_user_info_dc **_user_info_dc)
350 : {
351 : NTSTATUS status;
352 : struct auth_user_info_dc *user_info_dc;
353 : struct auth_user_info *info;
354 52180 : const char *str = NULL;
355 52180 : char *filter = NULL;
356 : /* SIDs for the account and his primary group */
357 : struct dom_sid *account_sid;
358 : struct dom_sid_buf buf;
359 : const char *primary_group_dn;
360 : DATA_BLOB primary_group_blob;
361 : /* SID structures for the expanded group memberships */
362 52180 : struct dom_sid *sids = NULL;
363 52180 : unsigned int num_sids = 0, i;
364 : struct dom_sid *domain_sid;
365 : TALLOC_CTX *tmp_ctx;
366 : struct ldb_message_element *el;
367 :
368 52180 : user_info_dc = talloc_zero(mem_ctx, struct auth_user_info_dc);
369 52180 : NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
370 :
371 52180 : tmp_ctx = talloc_new(user_info_dc);
372 52180 : if (tmp_ctx == NULL) {
373 0 : TALLOC_FREE(user_info_dc);
374 0 : return NT_STATUS_NO_MEMORY;
375 : }
376 :
377 52180 : sids = talloc_array(user_info_dc, struct dom_sid, 2);
378 52180 : if (sids == NULL) {
379 0 : TALLOC_FREE(user_info_dc);
380 0 : return NT_STATUS_NO_MEMORY;
381 : }
382 :
383 52180 : num_sids = 2;
384 :
385 52180 : account_sid = samdb_result_dom_sid(tmp_ctx, msg, "objectSid");
386 52180 : if (account_sid == NULL) {
387 0 : TALLOC_FREE(user_info_dc);
388 0 : return NT_STATUS_NO_MEMORY;
389 : }
390 :
391 52180 : status = dom_sid_split_rid(tmp_ctx, account_sid, &domain_sid, NULL);
392 52180 : if (!NT_STATUS_IS_OK(status)) {
393 0 : talloc_free(user_info_dc);
394 0 : return status;
395 : }
396 :
397 52180 : sids[PRIMARY_USER_SID_INDEX] = *account_sid;
398 52180 : sids[PRIMARY_GROUP_SID_INDEX] = *domain_sid;
399 52180 : sid_append_rid(&sids[PRIMARY_GROUP_SID_INDEX], ldb_msg_find_attr_as_uint(msg, "primaryGroupID", ~0));
400 :
401 : /*
402 : * Filter out builtin groups from this token. We will search
403 : * for builtin groups later, and not include them in the PAC
404 : * or SamLogon validation info.
405 : */
406 52180 : status = authsam_domain_group_filter(tmp_ctx, &filter);
407 52180 : if (!NT_STATUS_IS_OK(status)) {
408 0 : TALLOC_FREE(user_info_dc);
409 0 : return status;
410 : }
411 :
412 101630 : primary_group_dn = talloc_asprintf(
413 : tmp_ctx,
414 : "<SID=%s>",
415 52180 : dom_sid_str_buf(&sids[PRIMARY_GROUP_SID_INDEX], &buf));
416 52180 : if (primary_group_dn == NULL) {
417 0 : TALLOC_FREE(user_info_dc);
418 0 : return NT_STATUS_NO_MEMORY;
419 : }
420 :
421 52180 : primary_group_blob = data_blob_string_const(primary_group_dn);
422 :
423 : /* Expands the primary group - this function takes in
424 : * memberOf-like values, so we fake one up with the
425 : * <SID=S-...> format of DN and then let it expand
426 : * them, as long as they meet the filter - so only
427 : * domain groups, not builtin groups
428 : *
429 : * The primary group is still treated specially, so we set the
430 : * 'only childs' flag to true
431 : */
432 52180 : status = dsdb_expand_nested_groups(sam_ctx, &primary_group_blob, true, filter,
433 : user_info_dc, &sids, &num_sids);
434 52180 : if (!NT_STATUS_IS_OK(status)) {
435 0 : talloc_free(user_info_dc);
436 0 : return status;
437 : }
438 :
439 : /* Expands the additional groups */
440 52180 : el = ldb_msg_find_element(msg, "memberOf");
441 210599 : for (i = 0; el && i < el->num_values; i++) {
442 : /* This function takes in memberOf values and expands
443 : * them, as long as they meet the filter - so only
444 : * domain groups, not builtin groups */
445 158419 : status = dsdb_expand_nested_groups(sam_ctx, &el->values[i], false, filter,
446 : user_info_dc, &sids, &num_sids);
447 158419 : if (!NT_STATUS_IS_OK(status)) {
448 0 : talloc_free(user_info_dc);
449 0 : return status;
450 : }
451 : }
452 :
453 52180 : user_info_dc->sids = sids;
454 52180 : user_info_dc->num_sids = num_sids;
455 :
456 52180 : user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
457 52180 : NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
458 :
459 52180 : str = ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL);
460 52180 : info->account_name = talloc_strdup(info, str);
461 52180 : if (info->account_name == NULL) {
462 0 : TALLOC_FREE(user_info_dc);
463 0 : return NT_STATUS_NO_MEMORY;
464 : }
465 :
466 52180 : str = ldb_msg_find_attr_as_string(msg, "userPrincipalName", NULL);
467 52180 : if (str == NULL && dns_domain_name != NULL) {
468 43887 : info->user_principal_name = talloc_asprintf(info, "%s@%s",
469 : info->account_name,
470 : dns_domain_name);
471 43887 : if (info->user_principal_name == NULL) {
472 0 : TALLOC_FREE(user_info_dc);
473 0 : return NT_STATUS_NO_MEMORY;
474 : }
475 43887 : info->user_principal_constructed = true;
476 8293 : } else if (str != NULL) {
477 8195 : info->user_principal_name = talloc_strdup(info, str);
478 8195 : if (info->user_principal_name == NULL) {
479 0 : TALLOC_FREE(user_info_dc);
480 0 : return NT_STATUS_NO_MEMORY;
481 : }
482 : }
483 :
484 52180 : info->domain_name = talloc_strdup(info, domain_name);
485 52180 : if (info->domain_name == NULL) {
486 0 : TALLOC_FREE(user_info_dc);
487 0 : return NT_STATUS_NO_MEMORY;
488 : }
489 :
490 52180 : if (dns_domain_name != NULL) {
491 52082 : info->dns_domain_name = talloc_strdup(info, dns_domain_name);
492 52082 : if (info->dns_domain_name == NULL) {
493 0 : TALLOC_FREE(user_info_dc);
494 0 : return NT_STATUS_NO_MEMORY;
495 : }
496 : }
497 :
498 52180 : str = ldb_msg_find_attr_as_string(msg, "displayName", "");
499 52180 : info->full_name = talloc_strdup(info, str);
500 52180 : if (info->full_name == NULL) {
501 0 : TALLOC_FREE(user_info_dc);
502 0 : return NT_STATUS_NO_MEMORY;
503 : }
504 :
505 52180 : str = ldb_msg_find_attr_as_string(msg, "scriptPath", "");
506 52180 : info->logon_script = talloc_strdup(info, str);
507 52180 : if (info->logon_script == NULL) {
508 0 : TALLOC_FREE(user_info_dc);
509 0 : return NT_STATUS_NO_MEMORY;
510 : }
511 :
512 52180 : str = ldb_msg_find_attr_as_string(msg, "profilePath", "");
513 52180 : info->profile_path = talloc_strdup(info, str);
514 52180 : if (info->profile_path == NULL) {
515 0 : TALLOC_FREE(user_info_dc);
516 0 : return NT_STATUS_NO_MEMORY;
517 : }
518 :
519 52180 : str = ldb_msg_find_attr_as_string(msg, "homeDirectory", "");
520 52180 : info->home_directory = talloc_strdup(info, str);
521 52180 : if (info->home_directory == NULL) {
522 0 : TALLOC_FREE(user_info_dc);
523 0 : return NT_STATUS_NO_MEMORY;
524 : }
525 :
526 52180 : str = ldb_msg_find_attr_as_string(msg, "homeDrive", "");
527 52180 : info->home_drive = talloc_strdup(info, str);
528 52180 : if (info->home_drive == NULL) {
529 0 : TALLOC_FREE(user_info_dc);
530 0 : return NT_STATUS_NO_MEMORY;
531 : }
532 :
533 52180 : info->logon_server = talloc_strdup(info, netbios_name);
534 52180 : if (info->logon_server == NULL) {
535 0 : TALLOC_FREE(user_info_dc);
536 0 : return NT_STATUS_NO_MEMORY;
537 : }
538 :
539 52180 : info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
540 52180 : info->last_logoff = samdb_result_last_logoff(msg);
541 52180 : info->acct_expiry = samdb_result_account_expires(msg);
542 52180 : info->last_password_change = samdb_result_nttime(msg,
543 : "pwdLastSet", 0);
544 : info->allow_password_change
545 52180 : = samdb_result_allow_password_change(sam_ctx, mem_ctx,
546 : domain_dn, msg, "pwdLastSet");
547 52180 : info->force_password_change = samdb_result_nttime(msg,
548 : "msDS-UserPasswordExpiryTimeComputed", 0);
549 52180 : info->logon_count = ldb_msg_find_attr_as_uint(msg, "logonCount", 0);
550 52180 : info->bad_password_count = ldb_msg_find_attr_as_uint(msg, "badPwdCount",
551 : 0);
552 :
553 52180 : info->acct_flags = samdb_result_acct_flags(msg, "msDS-User-Account-Control-Computed");
554 :
555 52180 : user_info_dc->user_session_key = data_blob_talloc(user_info_dc,
556 : user_sess_key.data,
557 : user_sess_key.length);
558 52180 : if (user_sess_key.data) {
559 0 : if (user_info_dc->user_session_key.data == NULL) {
560 0 : TALLOC_FREE(user_info_dc);
561 0 : return NT_STATUS_NO_MEMORY;
562 : }
563 : }
564 52180 : user_info_dc->lm_session_key = data_blob_talloc(user_info_dc,
565 : lm_sess_key.data,
566 : lm_sess_key.length);
567 52180 : if (lm_sess_key.data) {
568 0 : if (user_info_dc->lm_session_key.data == NULL) {
569 0 : TALLOC_FREE(user_info_dc);
570 0 : return NT_STATUS_NO_MEMORY;
571 : }
572 : }
573 :
574 52180 : if (info->acct_flags & ACB_SVRTRUST) {
575 : /* the SID_NT_ENTERPRISE_DCS SID gets added into the
576 : PAC */
577 2541 : user_info_dc->sids = talloc_realloc(user_info_dc,
578 : user_info_dc->sids,
579 : struct dom_sid,
580 : user_info_dc->num_sids+1);
581 2541 : if (user_info_dc->sids == NULL) {
582 0 : TALLOC_FREE(user_info_dc);
583 0 : return NT_STATUS_NO_MEMORY;
584 : }
585 2541 : user_info_dc->sids[user_info_dc->num_sids] = global_sid_Enterprise_DCs;
586 2541 : user_info_dc->num_sids++;
587 : }
588 :
589 52180 : if ((info->acct_flags & (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) ==
590 : (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) {
591 : /* the DOMAIN_RID_ENTERPRISE_READONLY_DCS PAC */
592 684 : user_info_dc->sids = talloc_realloc(user_info_dc,
593 : user_info_dc->sids,
594 : struct dom_sid,
595 : user_info_dc->num_sids+1);
596 684 : if (user_info_dc->sids == NULL) {
597 0 : TALLOC_FREE(user_info_dc);
598 0 : return NT_STATUS_NO_MEMORY;
599 : }
600 684 : user_info_dc->sids[user_info_dc->num_sids] = *domain_sid;
601 684 : sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
602 : DOMAIN_RID_ENTERPRISE_READONLY_DCS);
603 684 : user_info_dc->num_sids++;
604 : }
605 :
606 52180 : info->authenticated = true;
607 :
608 52180 : talloc_free(tmp_ctx);
609 52180 : *_user_info_dc = user_info_dc;
610 :
611 52180 : return NT_STATUS_OK;
612 : }
613 :
614 36255 : _PUBLIC_ NTSTATUS authsam_update_user_info_dc(TALLOC_CTX *mem_ctx,
615 : struct ldb_context *sam_ctx,
616 : struct auth_user_info_dc *user_info_dc)
617 : {
618 36255 : char *filter = NULL;
619 : NTSTATUS status;
620 : uint32_t i;
621 36255 : uint32_t n = 0;
622 :
623 : /*
624 : * This function exists to expand group memberships
625 : * in the local domain (forest), as the token
626 : * may come from a different domain.
627 : */
628 :
629 : /*
630 : * Filter out builtin groups from this token. We will search
631 : * for builtin groups later.
632 : */
633 36255 : status = authsam_domain_group_filter(mem_ctx, &filter);
634 36255 : if (!NT_STATUS_IS_OK(status)) {
635 0 : TALLOC_FREE(user_info_dc);
636 0 : return status;
637 : }
638 :
639 : /*
640 : * We loop only over the existing number of
641 : * sids.
642 : */
643 36255 : n = user_info_dc->num_sids;
644 282069 : for (i = 0; i < n; i++) {
645 245814 : struct dom_sid *sid = &user_info_dc->sids[i];
646 : struct dom_sid_buf sid_buf;
647 : char dn_str[sizeof(sid_buf.buf)*2];
648 245814 : DATA_BLOB dn_blob = data_blob_null;
649 :
650 245814 : snprintf(dn_str,
651 : sizeof(dn_str),
652 : "<SID=%s>",
653 : dom_sid_str_buf(sid, &sid_buf));
654 245814 : dn_blob = data_blob_string_const(dn_str);
655 :
656 : /*
657 : * We already have the SID in the token, so set
658 : * 'only childs' flag to true and add all
659 : * groups which match the filter.
660 : */
661 245814 : status = dsdb_expand_nested_groups(sam_ctx, &dn_blob,
662 : true, filter,
663 : user_info_dc,
664 : &user_info_dc->sids,
665 245814 : &user_info_dc->num_sids);
666 245814 : if (!NT_STATUS_IS_OK(status)) {
667 0 : return status;
668 : }
669 : }
670 :
671 36255 : return NT_STATUS_OK;
672 : }
673 :
674 71696 : NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
675 : TALLOC_CTX *mem_ctx, const char *principal,
676 : const char **attrs,
677 : struct ldb_dn **domain_dn,
678 : struct ldb_message **msg)
679 : {
680 : struct ldb_dn *user_dn;
681 : NTSTATUS nt_status;
682 71696 : TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
683 : int ret;
684 :
685 71696 : if (!tmp_ctx) {
686 0 : return NT_STATUS_NO_MEMORY;
687 : }
688 :
689 71696 : nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal,
690 : &user_dn, domain_dn);
691 71696 : if (!NT_STATUS_IS_OK(nt_status)) {
692 2426 : talloc_free(tmp_ctx);
693 2426 : return nt_status;
694 : }
695 :
696 : /* pull the user attributes */
697 69270 : ret = dsdb_search_one(sam_ctx, tmp_ctx, msg, user_dn,
698 : LDB_SCOPE_BASE, attrs,
699 : DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
700 : "(objectClass=*)");
701 69270 : if (ret != LDB_SUCCESS) {
702 0 : talloc_free(tmp_ctx);
703 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
704 : }
705 69270 : talloc_steal(mem_ctx, *msg);
706 69270 : talloc_steal(mem_ctx, *domain_dn);
707 69270 : talloc_free(tmp_ctx);
708 :
709 69270 : return NT_STATUS_OK;
710 : }
711 :
712 : /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available, and for tokenGroups in the DSDB stack.
713 :
714 : Supply either a principal or a DN
715 : */
716 159 : NTSTATUS authsam_get_user_info_dc_principal(TALLOC_CTX *mem_ctx,
717 : struct loadparm_context *lp_ctx,
718 : struct ldb_context *sam_ctx,
719 : const char *principal,
720 : struct ldb_dn *user_dn,
721 : struct auth_user_info_dc **user_info_dc)
722 : {
723 : NTSTATUS nt_status;
724 159 : DATA_BLOB user_sess_key = data_blob(NULL, 0);
725 159 : DATA_BLOB lm_sess_key = data_blob(NULL, 0);
726 :
727 : struct ldb_message *msg;
728 : struct ldb_dn *domain_dn;
729 :
730 159 : TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
731 159 : if (!tmp_ctx) {
732 0 : return NT_STATUS_NO_MEMORY;
733 : }
734 :
735 159 : if (principal) {
736 0 : nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
737 : user_attrs, &domain_dn, &msg);
738 0 : if (!NT_STATUS_IS_OK(nt_status)) {
739 0 : talloc_free(tmp_ctx);
740 0 : return nt_status;
741 : }
742 159 : } else if (user_dn) {
743 : struct dom_sid *user_sid, *domain_sid;
744 : int ret;
745 : /* pull the user attributes */
746 159 : ret = dsdb_search_one(sam_ctx, tmp_ctx, &msg, user_dn,
747 : LDB_SCOPE_BASE, user_attrs,
748 : DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
749 : "(objectClass=*)");
750 159 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
751 0 : talloc_free(tmp_ctx);
752 0 : return NT_STATUS_NO_SUCH_USER;
753 159 : } else if (ret != LDB_SUCCESS) {
754 0 : talloc_free(tmp_ctx);
755 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
756 : }
757 :
758 159 : user_sid = samdb_result_dom_sid(msg, msg, "objectSid");
759 :
760 159 : nt_status = dom_sid_split_rid(tmp_ctx, user_sid, &domain_sid, NULL);
761 159 : if (!NT_STATUS_IS_OK(nt_status)) {
762 0 : return nt_status;
763 : }
764 :
765 159 : domain_dn = samdb_search_dn(sam_ctx, mem_ctx, NULL,
766 : "(&(objectSid=%s)(objectClass=domain))",
767 : ldap_encode_ndr_dom_sid(tmp_ctx, domain_sid));
768 159 : if (!domain_dn) {
769 : struct dom_sid_buf buf;
770 0 : DEBUG(3, ("authsam_get_user_info_dc_principal: Failed to find domain with: SID %s\n",
771 : dom_sid_str_buf(domain_sid, &buf)));
772 0 : return NT_STATUS_NO_SUCH_USER;
773 : }
774 :
775 : } else {
776 0 : return NT_STATUS_INVALID_PARAMETER;
777 : }
778 :
779 159 : nt_status = authsam_make_user_info_dc(tmp_ctx, sam_ctx,
780 : lpcfg_netbios_name(lp_ctx),
781 : lpcfg_sam_name(lp_ctx),
782 : lpcfg_sam_dnsname(lp_ctx),
783 : domain_dn,
784 : msg,
785 : user_sess_key, lm_sess_key,
786 : user_info_dc);
787 159 : if (!NT_STATUS_IS_OK(nt_status)) {
788 0 : talloc_free(tmp_ctx);
789 0 : return nt_status;
790 : }
791 :
792 159 : talloc_steal(mem_ctx, *user_info_dc);
793 159 : talloc_free(tmp_ctx);
794 :
795 159 : return NT_STATUS_OK;
796 : }
797 :
798 : /*
799 : * Returns the details for the Password Settings Object (PSO), if one applies
800 : * the user.
801 : */
802 3503 : static int authsam_get_user_pso(struct ldb_context *sam_ctx,
803 : TALLOC_CTX *mem_ctx,
804 : struct ldb_message *user_msg,
805 : struct ldb_message **pso_msg)
806 : {
807 3503 : const char *attrs[] = { "msDS-LockoutThreshold",
808 : "msDS-LockoutObservationWindow",
809 : NULL };
810 3503 : struct ldb_dn *pso_dn = NULL;
811 3503 : struct ldb_result *res = NULL;
812 : int ret;
813 :
814 : /* check if the user has a PSO that applies to it */
815 3503 : pso_dn = ldb_msg_find_attr_as_dn(sam_ctx, mem_ctx, user_msg,
816 : "msDS-ResultantPSO");
817 :
818 3503 : if (pso_dn != NULL) {
819 25 : ret = dsdb_search_dn(sam_ctx, mem_ctx, &res, pso_dn, attrs, 0);
820 25 : if (ret != LDB_SUCCESS) {
821 0 : return ret;
822 : }
823 :
824 25 : *pso_msg = res->msgs[0];
825 : }
826 :
827 3503 : return LDB_SUCCESS;
828 : }
829 :
830 : /*
831 : * Re-read the bad password and successful logon data for a user.
832 : *
833 : * The DN in the passed user record should contain the "objectGUID" in case the
834 : * object DN has changed.
835 : */
836 27986 : NTSTATUS authsam_reread_user_logon_data(
837 : struct ldb_context *sam_ctx,
838 : TALLOC_CTX *mem_ctx,
839 : const struct ldb_message *user_msg,
840 : struct ldb_message **current)
841 : {
842 27986 : const struct ldb_val *v = NULL;
843 27986 : struct ldb_result *res = NULL;
844 27986 : uint16_t acct_flags = 0;
845 27986 : const char *attr_name = "msDS-User-Account-Control-Computed";
846 :
847 : int ret;
848 :
849 : /*
850 : * Re-read the account details, using the GUID in case the DN
851 : * is being changed (this is automatic in LDB because the
852 : * original search also used DSDB_SEARCH_SHOW_EXTENDED_DN)
853 : *
854 : * We re read all the attributes in user_attrs, rather than using a
855 : * subset to ensure that we can reuse existing validation code.
856 : */
857 27986 : ret = dsdb_search_dn(sam_ctx,
858 : mem_ctx,
859 : &res,
860 2375 : user_msg->dn,
861 : user_attrs,
862 : DSDB_SEARCH_SHOW_EXTENDED_DN);
863 27986 : if (ret != LDB_SUCCESS) {
864 0 : DBG_ERR("Unable to re-read account control data for %s\n",
865 : ldb_dn_get_linearized(user_msg->dn));
866 0 : return NT_STATUS_INTERNAL_ERROR;
867 : }
868 :
869 : /*
870 : * Ensure the account has not been locked out by another request
871 : */
872 27986 : v = ldb_msg_find_ldb_val(res->msgs[0], attr_name);
873 27986 : if (v == NULL || v->data == NULL) {
874 0 : DBG_ERR("No %s attribute for %s\n",
875 : attr_name,
876 : ldb_dn_get_linearized(user_msg->dn));
877 0 : TALLOC_FREE(res);
878 0 : return NT_STATUS_INTERNAL_ERROR;
879 : }
880 27986 : acct_flags = samdb_result_acct_flags(res->msgs[0], attr_name);
881 27986 : if (acct_flags & ACB_AUTOLOCK) {
882 0 : DBG_WARNING(
883 : "Account for user %s was locked out.\n",
884 : ldb_dn_get_linearized(user_msg->dn));
885 0 : TALLOC_FREE(res);
886 0 : return NT_STATUS_ACCOUNT_LOCKED_OUT;
887 : }
888 27986 : *current = talloc_steal(mem_ctx, res->msgs[0]);
889 27986 : TALLOC_FREE(res);
890 27986 : return NT_STATUS_OK;
891 : }
892 :
893 68911 : static struct db_context *authsam_get_bad_password_db(
894 : TALLOC_CTX *mem_ctx,
895 : struct ldb_context *sam_ctx)
896 : {
897 68911 : struct loadparm_context *lp_ctx = NULL;
898 68911 : const char *db_name = "bad_password";
899 68911 : struct db_context *db_ctx = NULL;
900 :
901 68911 : lp_ctx = ldb_get_opaque(sam_ctx, "loadparm");
902 68911 : if (lp_ctx == NULL) {
903 0 : DBG_ERR("Unable to get loadparm_context\n");
904 0 : return NULL;
905 : }
906 :
907 68911 : db_ctx = cluster_db_tmp_open(mem_ctx, lp_ctx, db_name, TDB_DEFAULT);
908 68911 : if (db_ctx == NULL) {
909 0 : DBG_ERR("Unable to open bad password attempts database\n");
910 0 : return NULL;
911 : }
912 68911 : return db_ctx;
913 : }
914 :
915 68911 : static NTSTATUS get_object_sid_as_tdb_data(
916 : TALLOC_CTX *mem_ctx,
917 : const struct ldb_message *msg,
918 : struct dom_sid_buf *buf,
919 : TDB_DATA *key)
920 : {
921 68911 : struct dom_sid *objectsid = NULL;
922 :
923 : /*
924 : * Convert the objectSID to a human readable form to
925 : * make debugging easier
926 : */
927 68911 : objectsid = samdb_result_dom_sid(mem_ctx, msg, "objectSID");
928 68911 : if (objectsid == NULL) {
929 0 : DBG_ERR("Unable to extract objectSID\n");
930 0 : return NT_STATUS_INTERNAL_ERROR;
931 : }
932 68911 : dom_sid_str_buf(objectsid, buf);
933 68911 : key->dptr = (unsigned char *)buf->buf;
934 68911 : key->dsize = strlen(buf->buf);
935 :
936 68911 : talloc_free(objectsid);
937 :
938 68911 : return NT_STATUS_OK;
939 : }
940 :
941 : /*
942 : * Add the users objectSID to the bad password attempt database
943 : * to indicate that last authentication failed due to a bad password
944 : */
945 521 : static NTSTATUS authsam_set_bad_password_indicator(
946 : struct ldb_context *sam_ctx,
947 : TALLOC_CTX *mem_ctx,
948 : const struct ldb_message *msg)
949 : {
950 521 : NTSTATUS status = NT_STATUS_OK;
951 : struct dom_sid_buf buf;
952 521 : TDB_DATA key = {0};
953 521 : TDB_DATA value = {0};
954 521 : struct db_context *db = NULL;
955 :
956 521 : TALLOC_CTX *ctx = talloc_new(mem_ctx);
957 521 : if (ctx == NULL) {
958 0 : return NT_STATUS_NO_MEMORY;
959 : }
960 :
961 521 : db = authsam_get_bad_password_db(ctx, sam_ctx);
962 521 : if (db == NULL) {
963 0 : status = NT_STATUS_INTERNAL_ERROR;
964 0 : goto exit;
965 : }
966 :
967 521 : status = get_object_sid_as_tdb_data(ctx, msg, &buf, &key);
968 521 : if (!NT_STATUS_IS_OK(status)) {
969 0 : goto exit;
970 : }
971 :
972 521 : status = dbwrap_store(db, key, value, 0);
973 521 : if (!NT_STATUS_IS_OK(status)) {
974 0 : DBG_ERR("Unable to store bad password indicator\n");
975 : }
976 1042 : exit:
977 521 : talloc_free(ctx);
978 521 : return status;
979 : }
980 :
981 : /*
982 : * see if the users objectSID is in the bad password attempt database
983 : */
984 34195 : static NTSTATUS authsam_check_bad_password_indicator(
985 : struct ldb_context *sam_ctx,
986 : TALLOC_CTX *mem_ctx,
987 : bool *exists,
988 : const struct ldb_message *msg)
989 : {
990 34195 : NTSTATUS status = NT_STATUS_OK;
991 : struct dom_sid_buf buf;
992 34195 : TDB_DATA key = {0};
993 34195 : struct db_context *db = NULL;
994 :
995 34195 : TALLOC_CTX *ctx = talloc_new(mem_ctx);
996 34195 : if (ctx == NULL) {
997 0 : return NT_STATUS_NO_MEMORY;
998 : }
999 :
1000 34195 : db = authsam_get_bad_password_db(ctx, sam_ctx);
1001 34195 : if (db == NULL) {
1002 0 : status = NT_STATUS_INTERNAL_ERROR;
1003 0 : goto exit;
1004 : }
1005 :
1006 34195 : status = get_object_sid_as_tdb_data(ctx, msg, &buf, &key);
1007 34195 : if (!NT_STATUS_IS_OK(status)) {
1008 0 : goto exit;
1009 : }
1010 :
1011 34195 : *exists = dbwrap_exists(db, key);
1012 34195 : exit:
1013 34195 : talloc_free(ctx);
1014 34195 : return status;
1015 : }
1016 :
1017 : /*
1018 : * Remove the users objectSID to the bad password attempt database
1019 : * to indicate that last authentication succeeded.
1020 : */
1021 34195 : static NTSTATUS authsam_clear_bad_password_indicator(
1022 : struct ldb_context *sam_ctx,
1023 : TALLOC_CTX *mem_ctx,
1024 : const struct ldb_message *msg)
1025 : {
1026 34195 : NTSTATUS status = NT_STATUS_OK;
1027 : struct dom_sid_buf buf;
1028 34195 : TDB_DATA key = {0};
1029 34195 : struct db_context *db = NULL;
1030 :
1031 34195 : TALLOC_CTX *ctx = talloc_new(mem_ctx);
1032 34195 : if (ctx == NULL) {
1033 0 : return NT_STATUS_NO_MEMORY;
1034 : }
1035 :
1036 34195 : db = authsam_get_bad_password_db(ctx, sam_ctx);
1037 34195 : if (db == NULL) {
1038 0 : status = NT_STATUS_INTERNAL_ERROR;
1039 0 : goto exit;
1040 : }
1041 :
1042 34195 : status = get_object_sid_as_tdb_data(ctx, msg, &buf, &key);
1043 34195 : if (!NT_STATUS_IS_OK(status)) {
1044 0 : goto exit;
1045 : }
1046 :
1047 34195 : status = dbwrap_delete(db, key);
1048 34195 : if (NT_STATUS_EQUAL(NT_STATUS_NOT_FOUND, status)) {
1049 : /*
1050 : * Ok there was no bad password indicator this is expected
1051 : */
1052 33861 : status = NT_STATUS_OK;
1053 : }
1054 34195 : if (NT_STATUS_IS_ERR(status)) {
1055 0 : DBG_ERR("Unable to delete bad password indicator, %s %s\n",
1056 : nt_errstr(status),
1057 : get_friendly_nt_error_msg(status));
1058 : }
1059 65733 : exit:
1060 34195 : talloc_free(ctx);
1061 34195 : return status;
1062 : }
1063 :
1064 3503 : NTSTATUS authsam_update_bad_pwd_count(struct ldb_context *sam_ctx,
1065 : struct ldb_message *msg,
1066 : struct ldb_dn *domain_dn)
1067 : {
1068 3503 : const char *attrs[] = { "lockoutThreshold",
1069 : "lockOutObservationWindow",
1070 : "lockoutDuration",
1071 : "pwdProperties",
1072 : NULL };
1073 : int ret;
1074 : NTSTATUS status;
1075 : struct ldb_result *domain_res;
1076 3503 : struct ldb_message *msg_mod = NULL;
1077 3503 : struct ldb_message *current = NULL;
1078 3503 : struct ldb_message *pso_msg = NULL;
1079 3503 : bool txn_active = false;
1080 : TALLOC_CTX *mem_ctx;
1081 :
1082 3503 : mem_ctx = talloc_new(msg);
1083 3503 : if (mem_ctx == NULL) {
1084 0 : return NT_STATUS_NO_MEMORY;
1085 : }
1086 :
1087 3503 : ret = dsdb_search_dn(sam_ctx, mem_ctx, &domain_res, domain_dn, attrs, 0);
1088 3503 : if (ret != LDB_SUCCESS) {
1089 0 : TALLOC_FREE(mem_ctx);
1090 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
1091 : }
1092 :
1093 3503 : ret = authsam_get_user_pso(sam_ctx, mem_ctx, msg, &pso_msg);
1094 3503 : if (ret != LDB_SUCCESS) {
1095 :
1096 : /*
1097 : * fallback to using the domain defaults so that we still
1098 : * record the bad password attempt
1099 : */
1100 0 : DBG_ERR("Error (%d) checking PSO for %s\n",
1101 : ret, ldb_dn_get_linearized(msg->dn));
1102 : }
1103 :
1104 : /*
1105 : * To ensure that the bad password count is updated atomically,
1106 : * we need to:
1107 : * begin a transaction
1108 : * re-read the account details,
1109 : * using the <GUID= part of the DN
1110 : * update the bad password count
1111 : * commit the transaction.
1112 : */
1113 :
1114 : /*
1115 : * Start a new transaction
1116 : */
1117 3503 : ret = ldb_transaction_start(sam_ctx);
1118 3503 : if (ret != LDB_SUCCESS) {
1119 0 : status = NT_STATUS_INTERNAL_ERROR;
1120 0 : goto error;
1121 : }
1122 3503 : txn_active = true;
1123 :
1124 : /*
1125 : * Re-read the account details, using the GUID in case the DN
1126 : * is being changed.
1127 : */
1128 3503 : status = authsam_reread_user_logon_data(
1129 : sam_ctx, mem_ctx, msg, ¤t);
1130 3503 : if (!NT_STATUS_IS_OK(status)) {
1131 : /* The re-read can return account locked out, as well
1132 : * as an internal error
1133 : */
1134 0 : if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
1135 : /*
1136 : * For NT_STATUS_ACCOUNT_LOCKED_OUT we want to commit
1137 : * the transaction. Again to avoid cluttering the
1138 : * audit logs with spurious errors
1139 : */
1140 0 : goto exit;
1141 : }
1142 0 : goto error;
1143 : }
1144 :
1145 : /*
1146 : * Update the bad password count and if required lock the account
1147 : */
1148 6748 : status = dsdb_update_bad_pwd_count(
1149 : mem_ctx,
1150 : sam_ctx,
1151 : current,
1152 3503 : domain_res->msgs[0],
1153 : pso_msg,
1154 : &msg_mod);
1155 3503 : if (!NT_STATUS_IS_OK(status)) {
1156 0 : status = NT_STATUS_INTERNAL_ERROR;
1157 0 : goto error;
1158 : }
1159 :
1160 : /*
1161 : * Write the data back to disk if required.
1162 : */
1163 3503 : if (msg_mod != NULL) {
1164 : struct ldb_request *req;
1165 :
1166 521 : ret = ldb_build_mod_req(&req, sam_ctx, sam_ctx,
1167 : msg_mod,
1168 : NULL,
1169 : NULL,
1170 : ldb_op_default_callback,
1171 : NULL);
1172 521 : if (ret != LDB_SUCCESS) {
1173 0 : TALLOC_FREE(msg_mod);
1174 0 : status = NT_STATUS_INTERNAL_ERROR;
1175 0 : goto error;
1176 : }
1177 :
1178 521 : ret = ldb_request_add_control(req,
1179 : DSDB_CONTROL_FORCE_RODC_LOCAL_CHANGE,
1180 : false, NULL);
1181 521 : if (ret != LDB_SUCCESS) {
1182 0 : talloc_free(req);
1183 0 : status = NT_STATUS_INTERNAL_ERROR;
1184 0 : goto error;
1185 : }
1186 :
1187 : /*
1188 : * As we're in a transaction, make the ldb request directly
1189 : * to avoid the nested transaction that would result if we
1190 : * called dsdb_autotransaction_request
1191 : */
1192 521 : ret = ldb_request(sam_ctx, req);
1193 521 : if (ret == LDB_SUCCESS) {
1194 521 : ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1195 : }
1196 521 : talloc_free(req);
1197 521 : if (ret != LDB_SUCCESS) {
1198 0 : status = NT_STATUS_INTERNAL_ERROR;
1199 0 : goto error;
1200 : }
1201 521 : status = authsam_set_bad_password_indicator(
1202 : sam_ctx, mem_ctx, msg);
1203 521 : if (!NT_STATUS_IS_OK(status)) {
1204 0 : goto error;
1205 : }
1206 : }
1207 : /*
1208 : * Note that we may not have updated the user record, but
1209 : * committing the transaction in that case is still the correct
1210 : * thing to do.
1211 : * If the transaction was cancelled, this would be logged by
1212 : * the dsdb audit log as a failure. When in fact it is expected
1213 : * behaviour.
1214 : */
1215 2982 : exit:
1216 3503 : TALLOC_FREE(mem_ctx);
1217 3503 : ret = ldb_transaction_commit(sam_ctx);
1218 3503 : if (ret != LDB_SUCCESS) {
1219 0 : DBG_ERR("Error (%d) %s, committing transaction,"
1220 : " while updating bad password count"
1221 : " for (%s)\n",
1222 : ret,
1223 : ldb_errstring(sam_ctx),
1224 : ldb_dn_get_linearized(msg->dn));
1225 0 : return NT_STATUS_INTERNAL_ERROR;
1226 : }
1227 3503 : return status;
1228 :
1229 0 : error:
1230 0 : DBG_ERR("Failed to update badPwdCount, badPasswordTime or "
1231 : "set lockoutTime on %s: %s\n",
1232 : ldb_dn_get_linearized(msg->dn),
1233 : ldb_errstring(sam_ctx) != NULL ?
1234 : ldb_errstring(sam_ctx) :nt_errstr(status));
1235 0 : if (txn_active) {
1236 0 : ret = ldb_transaction_cancel(sam_ctx);
1237 0 : if (ret != LDB_SUCCESS) {
1238 0 : DBG_ERR("Error rolling back transaction,"
1239 : " while updating bad password count"
1240 : " on %s: %s\n",
1241 : ldb_dn_get_linearized(msg->dn),
1242 : ldb_errstring(sam_ctx));
1243 : }
1244 : }
1245 0 : TALLOC_FREE(mem_ctx);
1246 0 : return status;
1247 :
1248 : }
1249 :
1250 : /*
1251 : * msDS-LogonTimeSyncInterval is an int32_t number of days.
1252 : *
1253 : * The docs say: "the initial update, after the domain functional
1254 : * level is raised to DS_BEHAVIOR_WIN2003 or higher, is calculated as
1255 : * 14 days minus a random percentage of 5 days", but we aren't doing
1256 : * that. The blogosphere seems to think that this randomised update
1257 : * happens everytime, but [MS-ADA1] doesn't agree.
1258 : *
1259 : * Dochelp referred us to the following blog post:
1260 : * http://blogs.technet.com/b/askds/archive/2009/04/15/the-lastlogontimestamp-attribute-what-it-was-designed-for-and-how-it-works.aspx
1261 : *
1262 : * when msDS-LogonTimeSyncInterval is zero, the lastLogonTimestamp is
1263 : * not changed.
1264 : */
1265 :
1266 33571 : static NTSTATUS authsam_calculate_lastlogon_sync_interval(
1267 : struct ldb_context *sam_ctx,
1268 : TALLOC_CTX *ctx,
1269 : struct ldb_dn *domain_dn,
1270 : NTTIME *sync_interval_nt)
1271 : {
1272 : static const char *attrs[] = { "msDS-LogonTimeSyncInterval",
1273 : NULL };
1274 : int ret;
1275 33571 : struct ldb_result *domain_res = NULL;
1276 33571 : TALLOC_CTX *mem_ctx = NULL;
1277 : uint32_t sync_interval;
1278 :
1279 33571 : mem_ctx = talloc_new(ctx);
1280 33571 : if (mem_ctx == NULL) {
1281 0 : return NT_STATUS_NO_MEMORY;
1282 : }
1283 :
1284 33571 : ret = dsdb_search_dn(sam_ctx, mem_ctx, &domain_res, domain_dn, attrs,
1285 : 0);
1286 33571 : if (ret != LDB_SUCCESS || domain_res->count != 1) {
1287 0 : TALLOC_FREE(mem_ctx);
1288 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
1289 : }
1290 :
1291 33571 : sync_interval = ldb_msg_find_attr_as_int(domain_res->msgs[0],
1292 : "msDS-LogonTimeSyncInterval",
1293 : 14);
1294 33571 : DEBUG(5, ("sync interval is %d\n", sync_interval));
1295 33571 : if (sync_interval >= 5){
1296 : /*
1297 : * Subtract "a random percentage of 5" days. Presumably this
1298 : * percentage is between 0 and 100, and modulus is accurate
1299 : * enough.
1300 : */
1301 33571 : uint32_t r = generate_random() % 6;
1302 33571 : sync_interval -= r;
1303 33571 : DBG_INFO("randomised sync interval is %d (-%d)\n", sync_interval, r);
1304 : }
1305 : /* In the case where sync_interval < 5 there is no randomisation */
1306 :
1307 : /*
1308 : * msDS-LogonTimeSyncInterval is an int32_t number of days,
1309 : * while lastLogonTimestamp (to be updated) is in the 64 bit
1310 : * 100ns NTTIME format so we must convert.
1311 : */
1312 33571 : *sync_interval_nt = sync_interval * 24LL * 3600LL * 10000000LL;
1313 33571 : TALLOC_FREE(mem_ctx);
1314 33571 : return NT_STATUS_OK;
1315 : }
1316 :
1317 :
1318 : /*
1319 : * We only set lastLogonTimestamp if the current value is older than
1320 : * now - msDS-LogonTimeSyncInterval days.
1321 : *
1322 : * lastLogonTimestamp is in the 64 bit 100ns NTTIME format
1323 : */
1324 56969 : static NTSTATUS authsam_update_lastlogon_timestamp(struct ldb_context *sam_ctx,
1325 : struct ldb_message *msg_mod,
1326 : struct ldb_dn *domain_dn,
1327 : NTTIME old_timestamp,
1328 : NTTIME now,
1329 : NTTIME sync_interval_nt)
1330 : {
1331 : int ret;
1332 56969 : DEBUG(5, ("old timestamp is %lld, threshold %lld, diff %lld\n",
1333 : (long long int)old_timestamp,
1334 : (long long int)(now - sync_interval_nt),
1335 : (long long int)(old_timestamp - now + sync_interval_nt)));
1336 :
1337 56969 : if (sync_interval_nt == 0){
1338 : /*
1339 : * Setting msDS-LogonTimeSyncInterval to zero is how you ask
1340 : * that nothing happens here.
1341 : */
1342 0 : return NT_STATUS_OK;
1343 : }
1344 56969 : if (old_timestamp > now){
1345 0 : DEBUG(0, ("lastLogonTimestamp is in the future! (%lld > %lld)\n",
1346 : (long long int)old_timestamp, (long long int)now));
1347 : /* then what? */
1348 :
1349 56969 : } else if (old_timestamp < now - sync_interval_nt){
1350 12059 : DEBUG(5, ("updating lastLogonTimestamp to %lld\n",
1351 : (long long int)now));
1352 :
1353 : /* The time has come to update lastLogonTimestamp */
1354 12059 : ret = samdb_msg_add_int64(sam_ctx, msg_mod, msg_mod,
1355 : "lastLogonTimestamp", now);
1356 :
1357 12059 : if (ret != LDB_SUCCESS) {
1358 0 : return NT_STATUS_NO_MEMORY;
1359 : }
1360 : }
1361 56969 : return NT_STATUS_OK;
1362 : }
1363 :
1364 : /****************************************************************************
1365 : Look for the specified user in the sam, return ldb result structures
1366 : ****************************************************************************/
1367 :
1368 21296 : NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
1369 : const char *account_name,
1370 : struct ldb_dn *domain_dn,
1371 : struct ldb_message **ret_msg)
1372 : {
1373 : int ret;
1374 :
1375 : /* pull the user attributes */
1376 21296 : ret = dsdb_search_one(sam_ctx, mem_ctx, ret_msg, domain_dn, LDB_SCOPE_SUBTREE,
1377 : user_attrs,
1378 : DSDB_SEARCH_SHOW_EXTENDED_DN,
1379 : "(&(sAMAccountName=%s)(objectclass=user))",
1380 : ldb_binary_encode_string(mem_ctx, account_name));
1381 21296 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
1382 434 : DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb, under %s\n",
1383 : account_name, ldb_dn_get_linearized(domain_dn)));
1384 434 : return NT_STATUS_NO_SUCH_USER;
1385 : }
1386 20862 : if (ret != LDB_SUCCESS) {
1387 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
1388 : }
1389 :
1390 20862 : return NT_STATUS_OK;
1391 : }
1392 :
1393 :
1394 : /* Reset the badPwdCount to zero and update the lastLogon time. */
1395 34195 : NTSTATUS authsam_logon_success_accounting(struct ldb_context *sam_ctx,
1396 : const struct ldb_message *msg,
1397 : struct ldb_dn *domain_dn,
1398 : bool interactive_or_kerberos,
1399 : TALLOC_CTX *send_to_sam_mem_ctx,
1400 : struct netr_SendToSamBase **send_to_sam)
1401 : {
1402 : int ret;
1403 : NTSTATUS status;
1404 : int badPwdCount;
1405 : int dbBadPwdCount;
1406 : int64_t lockoutTime;
1407 : struct ldb_message *msg_mod;
1408 : TALLOC_CTX *mem_ctx;
1409 : struct timeval tv_now;
1410 : NTTIME now;
1411 : NTTIME lastLogonTimestamp;
1412 : int64_t lockOutObservationWindow;
1413 34195 : NTTIME sync_interval_nt = 0;
1414 34195 : bool am_rodc = false;
1415 34195 : bool txn_active = false;
1416 : bool need_db_reread;
1417 :
1418 34195 : mem_ctx = talloc_new(msg);
1419 34195 : if (mem_ctx == NULL) {
1420 0 : return NT_STATUS_NO_MEMORY;
1421 : }
1422 :
1423 : /*
1424 : * Any update of the last logon data, needs to be done inside a
1425 : * transaction.
1426 : * And the user data needs to be re-read, and the account re-checked
1427 : * for lockout.
1428 : *
1429 : * Howevver we have long-running transactions like replication
1430 : * that could otherwise grind the system to a halt so we first
1431 : * determine if *this* account has seen a bad password,
1432 : * otherwise we only start a transaction if there was a need
1433 : * (because a change was to be made).
1434 : */
1435 :
1436 34195 : status = authsam_check_bad_password_indicator(
1437 : sam_ctx, mem_ctx, &need_db_reread, msg);
1438 34195 : if (!NT_STATUS_IS_OK(status)) {
1439 0 : return status;
1440 : }
1441 :
1442 34195 : if (interactive_or_kerberos == false) {
1443 : /*
1444 : * Avoid calculating this twice, it reads the PSO. A
1445 : * race on this is unimportant.
1446 : */
1447 : lockOutObservationWindow
1448 15528 : = samdb_result_msds_LockoutObservationWindow(
1449 : sam_ctx, mem_ctx, domain_dn, msg);
1450 : }
1451 :
1452 34195 : ret = samdb_rodc(sam_ctx, &am_rodc);
1453 34195 : if (ret != LDB_SUCCESS) {
1454 0 : status = NT_STATUS_INTERNAL_ERROR;
1455 0 : goto error;
1456 : }
1457 :
1458 34195 : if (!am_rodc) {
1459 : /*
1460 : * Avoid reading the main domain DN twice. A race on
1461 : * this is unimportant.
1462 : */
1463 33571 : status = authsam_calculate_lastlogon_sync_interval(
1464 : sam_ctx, mem_ctx, domain_dn, &sync_interval_nt);
1465 :
1466 33571 : if (!NT_STATUS_IS_OK(status)) {
1467 0 : status = NT_STATUS_INTERNAL_ERROR;
1468 0 : goto error;
1469 : }
1470 : }
1471 :
1472 34195 : get_transaction:
1473 :
1474 58074 : if (need_db_reread) {
1475 24213 : struct ldb_message *current = NULL;
1476 :
1477 : /*
1478 : * Start a new transaction
1479 : */
1480 24213 : ret = ldb_transaction_start(sam_ctx);
1481 24213 : if (ret != LDB_SUCCESS) {
1482 0 : status = NT_STATUS_INTERNAL_ERROR;
1483 0 : goto error;
1484 : }
1485 :
1486 24213 : txn_active = true;
1487 :
1488 : /*
1489 : * Re-read the account details, using the GUID
1490 : * embedded in DN so this is safe against a race where
1491 : * it is being renamed.
1492 : */
1493 24213 : status = authsam_reread_user_logon_data(
1494 : sam_ctx, mem_ctx, msg, ¤t);
1495 24213 : if (!NT_STATUS_IS_OK(status)) {
1496 : /*
1497 : * The re-read can return account locked out, as well
1498 : * as an internal error
1499 : */
1500 0 : if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
1501 : /*
1502 : * For NT_STATUS_ACCOUNT_LOCKED_OUT we want to commit
1503 : * the transaction. Again to avoid cluttering the
1504 : * audit logs with spurious errors
1505 : */
1506 0 : goto exit;
1507 : }
1508 0 : goto error;
1509 : }
1510 24213 : msg = current;
1511 : }
1512 :
1513 58074 : lockoutTime = ldb_msg_find_attr_as_int64(msg, "lockoutTime", 0);
1514 58074 : dbBadPwdCount = ldb_msg_find_attr_as_int(msg, "badPwdCount", 0);
1515 58074 : tv_now = timeval_current();
1516 58074 : now = timeval_to_nttime(&tv_now);
1517 :
1518 58074 : if (interactive_or_kerberos) {
1519 37201 : badPwdCount = dbBadPwdCount;
1520 : } else {
1521 : /*
1522 : * We get lockOutObservationWindow above, before the
1523 : * transaction
1524 : */
1525 20873 : badPwdCount = dsdb_effective_badPwdCount(
1526 : msg, lockOutObservationWindow, now);
1527 : }
1528 58074 : lastLogonTimestamp =
1529 58074 : ldb_msg_find_attr_as_int64(msg, "lastLogonTimestamp", 0);
1530 :
1531 58074 : DEBUG(5, ("lastLogonTimestamp is %lld\n",
1532 : (long long int)lastLogonTimestamp));
1533 :
1534 58074 : msg_mod = ldb_msg_new(mem_ctx);
1535 58074 : if (msg_mod == NULL) {
1536 0 : status = NT_STATUS_NO_MEMORY;
1537 0 : goto error;
1538 : }
1539 :
1540 : /*
1541 : * By using the DN from msg->dn directly, we allow LDB to
1542 : * prefer the embedded GUID form, so this is actually quite
1543 : * safe even in the case where DN has been changed
1544 : */
1545 58074 : msg_mod->dn = msg->dn;
1546 :
1547 58074 : if (lockoutTime != 0) {
1548 : /*
1549 : * This implies "badPwdCount" = 0, see samldb_lockout_time()
1550 : */
1551 36 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod, "lockoutTime", 0);
1552 36 : if (ret != LDB_SUCCESS) {
1553 0 : status = NT_STATUS_NO_MEMORY;
1554 0 : goto error;
1555 : }
1556 58038 : } else if (badPwdCount != 0) {
1557 304 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod, "badPwdCount", 0);
1558 304 : if (ret != LDB_SUCCESS) {
1559 0 : status = NT_STATUS_NO_MEMORY;
1560 0 : goto error;
1561 : }
1562 : }
1563 :
1564 58074 : if (interactive_or_kerberos ||
1565 185 : (badPwdCount != 0 && lockoutTime == 0)) {
1566 37386 : ret = samdb_msg_add_int64(sam_ctx, msg_mod, msg_mod,
1567 : "lastLogon", now);
1568 37386 : if (ret != LDB_SUCCESS) {
1569 0 : status = NT_STATUS_NO_MEMORY;
1570 0 : goto error;
1571 : }
1572 : }
1573 :
1574 58074 : if (interactive_or_kerberos) {
1575 : int logonCount;
1576 :
1577 37201 : logonCount = ldb_msg_find_attr_as_int(msg, "logonCount", 0);
1578 :
1579 37201 : logonCount += 1;
1580 :
1581 37201 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod,
1582 : "logonCount", logonCount);
1583 37201 : if (ret != LDB_SUCCESS) {
1584 0 : status = NT_STATUS_NO_MEMORY;
1585 0 : goto error;
1586 : }
1587 : } else {
1588 : /* Set an unset logonCount to 0 on first successful login */
1589 20873 : if (ldb_msg_find_ldb_val(msg, "logonCount") == NULL) {
1590 30 : ret = samdb_msg_add_int(sam_ctx, msg_mod, msg_mod,
1591 : "logonCount", 0);
1592 30 : if (ret != LDB_SUCCESS) {
1593 0 : TALLOC_FREE(mem_ctx);
1594 0 : return NT_STATUS_NO_MEMORY;
1595 : }
1596 : }
1597 : }
1598 :
1599 58074 : if (!am_rodc) {
1600 56969 : status = authsam_update_lastlogon_timestamp(
1601 : sam_ctx,
1602 : msg_mod,
1603 : domain_dn,
1604 : lastLogonTimestamp,
1605 : now,
1606 : sync_interval_nt);
1607 56969 : if (!NT_STATUS_IS_OK(status)) {
1608 0 : status = NT_STATUS_NO_MEMORY;
1609 0 : goto error;
1610 : }
1611 : } else {
1612 : /* Perform the (async) SendToSAM calls for MS-SAMS */
1613 1105 : if (dbBadPwdCount != 0 && send_to_sam != NULL) {
1614 : struct netr_SendToSamBase *base_msg;
1615 17 : struct GUID guid = samdb_result_guid(msg, "objectGUID");
1616 :
1617 17 : base_msg = talloc_zero(send_to_sam_mem_ctx,
1618 : struct netr_SendToSamBase);
1619 17 : if (base_msg == NULL) {
1620 0 : status = NT_STATUS_NO_MEMORY;
1621 0 : goto error;
1622 : }
1623 :
1624 17 : base_msg->message_type = SendToSamResetBadPasswordCount;
1625 17 : base_msg->message_size = 16;
1626 17 : base_msg->message.reset_bad_password.guid = guid;
1627 17 : *send_to_sam = base_msg;
1628 : }
1629 : }
1630 :
1631 58074 : if (msg_mod->num_elements > 0) {
1632 : unsigned int i;
1633 : struct ldb_request *req;
1634 :
1635 : /*
1636 : * If it turns out we are going to update the DB, go
1637 : * back to the start, get a transaction and the
1638 : * current DB state and try again
1639 : */
1640 48092 : if (txn_active == false) {
1641 23879 : need_db_reread = true;
1642 23879 : goto get_transaction;
1643 : }
1644 :
1645 : /* mark all the message elements as LDB_FLAG_MOD_REPLACE */
1646 68236 : for (i=0;i<msg_mod->num_elements;i++) {
1647 44023 : msg_mod->elements[i].flags = LDB_FLAG_MOD_REPLACE;
1648 : }
1649 :
1650 24213 : ret = ldb_build_mod_req(&req, sam_ctx, sam_ctx,
1651 : msg_mod,
1652 : NULL,
1653 : NULL,
1654 : ldb_op_default_callback,
1655 : NULL);
1656 24213 : if (ret != LDB_SUCCESS) {
1657 0 : status = NT_STATUS_INTERNAL_ERROR;
1658 0 : goto error;
1659 : }
1660 :
1661 24213 : ret = ldb_request_add_control(req,
1662 : DSDB_CONTROL_FORCE_RODC_LOCAL_CHANGE,
1663 : false, NULL);
1664 24213 : if (ret != LDB_SUCCESS) {
1665 0 : TALLOC_FREE(req);
1666 0 : status = NT_STATUS_INTERNAL_ERROR;
1667 0 : goto error;
1668 : }
1669 : /*
1670 : * As we're in a transaction, make the ldb request directly
1671 : * to avoid the nested transaction that would result if we
1672 : * called dsdb_autotransaction_request
1673 : */
1674 24213 : ret = ldb_request(sam_ctx, req);
1675 24213 : if (ret == LDB_SUCCESS) {
1676 24213 : ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1677 : }
1678 24213 : TALLOC_FREE(req);
1679 24213 : if (ret != LDB_SUCCESS) {
1680 0 : status = NT_STATUS_INTERNAL_ERROR;
1681 0 : goto error;
1682 : }
1683 : }
1684 34195 : status = authsam_clear_bad_password_indicator(sam_ctx, mem_ctx, msg);
1685 34195 : if (!NT_STATUS_IS_OK(status)) {
1686 0 : goto error;
1687 : }
1688 :
1689 : /*
1690 : * Note that we may not have updated the user record, but
1691 : * committing the transaction in that case is still the correct
1692 : * thing to do.
1693 : * If the transaction was cancelled, this would be logged by
1694 : * the dsdb audit log as a failure. When in fact it is expected
1695 : * behaviour.
1696 : *
1697 : * Thankfully both TDB and LMDB seem to optimise for the empty
1698 : * transaction case
1699 : */
1700 34195 : exit:
1701 34195 : TALLOC_FREE(mem_ctx);
1702 :
1703 34195 : if (txn_active == false) {
1704 9982 : return status;
1705 : }
1706 :
1707 24213 : ret = ldb_transaction_commit(sam_ctx);
1708 24213 : if (ret != LDB_SUCCESS) {
1709 0 : DBG_ERR("Error (%d) %s, committing transaction,"
1710 : " while updating successful logon accounting"
1711 : " for (%s)\n",
1712 : ret,
1713 : ldb_errstring(sam_ctx),
1714 : ldb_dn_get_linearized(msg->dn));
1715 0 : return NT_STATUS_INTERNAL_ERROR;
1716 : }
1717 24213 : return status;
1718 :
1719 0 : error:
1720 0 : DBG_ERR("Failed to update badPwdCount, badPasswordTime or "
1721 : "set lockoutTime on %s: %s\n",
1722 : ldb_dn_get_linearized(msg->dn),
1723 : ldb_errstring(sam_ctx) != NULL ?
1724 : ldb_errstring(sam_ctx) :nt_errstr(status));
1725 0 : if (txn_active) {
1726 0 : ret = ldb_transaction_cancel(sam_ctx);
1727 0 : if (ret != LDB_SUCCESS) {
1728 0 : DBG_ERR("Error rolling back transaction,"
1729 : " while updating bad password count"
1730 : " on %s: %s\n",
1731 : ldb_dn_get_linearized(msg->dn),
1732 : ldb_errstring(sam_ctx));
1733 : }
1734 : }
1735 0 : TALLOC_FREE(mem_ctx);
1736 0 : return status;
1737 : }
|
