s4-libnet: cope with an empty client site name from CLDAP
[Samba/gebeck_regimport.git] / source4 / auth / sam.c
blob201185cf4de0129365054ae6c0673b7fcda59183
1 /*
2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
5 Copyright (C) Gerald Carter 2003
6 Copyright (C) Stefan Metzmacher 2005
7 Copyright (C) Matthias Dieter Wallnöfer 2009
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "includes.h"
24 #include "system/time.h"
25 #include "auth/auth.h"
26 #include <ldb.h>
27 #include "../lib/util/util_ldb.h"
28 #include "dsdb/samdb/samdb.h"
29 #include "libcli/security/security.h"
30 #include "libcli/ldap/ldap.h"
31 #include "../libcli/ldap/ldap_ndr.h"
32 #include "librpc/gen_ndr/ndr_netlogon.h"
33 #include "librpc/gen_ndr/ndr_security.h"
34 #include "param/param.h"
35 #include "auth/auth_sam.h"
36 #include "dsdb/common/util.h"
38 #define KRBTGT_ATTRS \
39 /* required for the krb5 kdc */ \
40 "objectClass", \
41 "sAMAccountName", \
42 "userPrincipalName", \
43 "servicePrincipalName", \
44 "msDS-KeyVersionNumber", \
45 "supplementalCredentials", \
47 /* passwords */ \
48 "dBCSPwd", \
49 "unicodePwd", \
51 "userAccountControl", \
52 "objectSid", \
54 "pwdLastSet", \
55 "accountExpires"
57 const char *krbtgt_attrs[] = {
58 KRBTGT_ATTRS
61 const char *server_attrs[] = {
62 KRBTGT_ATTRS
65 const char *user_attrs[] = {
66 KRBTGT_ATTRS,
68 "logonHours",
70 /* check 'allowed workstations' */
71 "userWorkstations",
73 /* required for server_info, not access control: */
74 "displayName",
75 "scriptPath",
76 "profilePath",
77 "homeDirectory",
78 "homeDrive",
79 "lastLogon",
80 "lastLogoff",
81 "accountExpires",
82 "badPwdCount",
83 "logonCount",
84 "primaryGroupID",
85 "memberOf",
86 NULL,
89 /****************************************************************************
90 Check if a user is allowed to logon at this time. Note this is the
91 servers local time, as logon hours are just specified as a weekly
92 bitmask.
93 ****************************************************************************/
95 static bool logon_hours_ok(struct ldb_message *msg, const char *name_for_logs)
97 /* In logon hours first bit is Sunday from 12AM to 1AM */
98 const struct ldb_val *hours;
99 struct tm *utctime;
100 time_t lasttime;
101 const char *asct;
102 uint8_t bitmask, bitpos;
104 hours = ldb_msg_find_ldb_val(msg, "logonHours");
105 if (!hours) {
106 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs));
107 return true;
110 if (hours->length != 168/8) {
111 DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs));
112 return true;
115 lasttime = time(NULL);
116 utctime = gmtime(&lasttime);
117 if (!utctime) {
118 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
119 name_for_logs));
120 return false;
123 /* find the corresponding byte and bit */
124 bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
125 bitmask = 1 << (bitpos % 8);
127 if (! (hours->data[bitpos/8] & bitmask)) {
128 struct tm *t = localtime(&lasttime);
129 if (!t) {
130 asct = "INVALID TIME";
131 } else {
132 asct = asctime(t);
133 if (!asct) {
134 asct = "INVALID TIME";
138 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
139 "logon at this time (%s).\n",
140 name_for_logs, asct ));
141 return false;
144 asct = asctime(utctime);
145 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
146 name_for_logs, asct ? asct : "UNKNOWN TIME" ));
148 return true;
151 /****************************************************************************
152 Do a specific test for a SAM_ACCOUNT being valid for this connection
153 (ie not disabled, expired and the like).
154 ****************************************************************************/
155 _PUBLIC_ NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
156 struct ldb_context *sam_ctx,
157 uint32_t logon_parameters,
158 struct ldb_dn *domain_dn,
159 struct ldb_message *msg,
160 const char *logon_workstation,
161 const char *name_for_logs,
162 bool allow_domain_trust,
163 bool password_change)
165 uint16_t acct_flags;
166 const char *workstation_list;
167 NTTIME acct_expiry;
168 NTTIME must_change_time;
170 NTTIME now;
171 DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
173 acct_flags = samdb_result_acct_flags(sam_ctx, mem_ctx, msg, domain_dn);
175 acct_expiry = samdb_result_account_expires(msg);
177 /* Check for when we must change this password, taking the
178 * userAccountControl flags into account */
179 must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
180 domain_dn, msg);
182 workstation_list = samdb_result_string(msg, "userWorkstations", NULL);
184 /* Quit if the account was disabled. */
185 if (acct_flags & ACB_DISABLED) {
186 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
187 return NT_STATUS_ACCOUNT_DISABLED;
190 /* Quit if the account was locked out. */
191 if (acct_flags & ACB_AUTOLOCK) {
192 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
193 return NT_STATUS_ACCOUNT_LOCKED_OUT;
196 /* Test account expire time */
197 unix_to_nt_time(&now, time(NULL));
198 if (now > acct_expiry) {
199 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
200 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
201 nt_time_string(mem_ctx, acct_expiry)));
202 return NT_STATUS_ACCOUNT_EXPIRED;
205 /* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
206 if ((must_change_time == 0) && !password_change) {
207 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
208 name_for_logs));
209 return NT_STATUS_PASSWORD_MUST_CHANGE;
212 /* check for expired password (but not if this is a password change request) */
213 if ((must_change_time < now) && !password_change) {
214 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
215 name_for_logs));
216 DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
217 nt_time_string(mem_ctx, must_change_time)));
218 return NT_STATUS_PASSWORD_EXPIRED;
221 /* Test workstation. Workstation list is comma separated. */
222 if (logon_workstation && workstation_list && *workstation_list) {
223 bool invalid_ws = true;
224 int i;
225 const char **workstations = (const char **)str_list_make(mem_ctx, workstation_list, ",");
227 for (i = 0; workstations && workstations[i]; i++) {
228 DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
229 workstations[i], logon_workstation));
231 if (strequal(workstations[i], logon_workstation)) {
232 invalid_ws = false;
233 break;
237 talloc_free(workstations);
239 if (invalid_ws) {
240 return NT_STATUS_INVALID_WORKSTATION;
244 if (!logon_hours_ok(msg, name_for_logs)) {
245 return NT_STATUS_INVALID_LOGON_HOURS;
248 if (!allow_domain_trust) {
249 if (acct_flags & ACB_DOMTRUST) {
250 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
251 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
254 if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
255 if (acct_flags & ACB_SVRTRUST) {
256 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
257 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
260 if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
261 /* TODO: this fails with current solaris client. We
262 need to work with Gordon to work out why */
263 if (acct_flags & ACB_WSTRUST) {
264 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
265 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
269 return NT_STATUS_OK;
272 /* This function tests if a SID structure "sids" contains the SID "sid" */
273 static bool sids_contains_sid(const struct dom_sid **sids,
274 const unsigned int num_sids,
275 const struct dom_sid *sid)
277 unsigned int i;
279 for (i = 0; i < num_sids; i++) {
280 if (dom_sid_equal(sids[i], sid))
281 return true;
283 return false;
288 * This function generates the transitive closure of a given SID "sid" (it
289 * basically expands nested groups of a SID).
290 * If the SID isn't located in the "res_sids" structure yet and the
291 * "only_childs" flag is negative, we add it to "res_sids".
292 * Then we've always to consider the "memberOf" attributes. We invoke the
293 * function recursively on each item of it with the "only_childs" flag set to
294 * "false".
295 * The "only_childs" flag is particularly useful if you have a user SID and
296 * want to include all his groups (referenced with "memberOf") without his SID
297 * itself.
299 * At the beginning "res_sids" should reference to a NULL pointer.
301 _PUBLIC_ NTSTATUS authsam_expand_nested_groups(struct ldb_context *sam_ctx,
302 const struct dom_sid *sid, const bool only_childs,
303 TALLOC_CTX *res_sids_ctx, struct dom_sid ***res_sids,
304 unsigned int *num_res_sids)
306 const char * const attrs[] = { "memberOf", NULL };
307 unsigned int i;
308 int ret;
309 bool already_there;
310 struct ldb_dn *tmp_dn;
311 struct dom_sid *tmp_sid;
312 TALLOC_CTX *tmp_ctx;
313 struct ldb_message **res;
314 NTSTATUS status;
316 if (*res_sids == NULL) {
317 *num_res_sids = 0;
320 if (sid == NULL) {
321 return NT_STATUS_OK;
324 already_there = sids_contains_sid((const struct dom_sid**) *res_sids,
325 *num_res_sids, sid);
326 if (already_there) {
327 return NT_STATUS_OK;
330 if (!only_childs) {
331 tmp_sid = dom_sid_dup(res_sids_ctx, sid);
332 NT_STATUS_HAVE_NO_MEMORY(tmp_sid);
333 *res_sids = talloc_realloc(res_sids_ctx, *res_sids,
334 struct dom_sid *, *num_res_sids + 1);
335 NT_STATUS_HAVE_NO_MEMORY(*res_sids);
336 (*res_sids)[*num_res_sids] = tmp_sid;
337 ++(*num_res_sids);
340 tmp_ctx = talloc_new(res_sids_ctx);
342 ret = gendb_search(sam_ctx, tmp_ctx, NULL, &res, attrs,
343 "objectSid=%s", ldap_encode_ndr_dom_sid(tmp_ctx, sid));
344 if (ret != 1) {
345 talloc_free(tmp_ctx);
346 return NT_STATUS_INTERNAL_DB_CORRUPTION;
349 if (res[0]->num_elements == 0) {
350 talloc_free(res);
351 talloc_free(tmp_ctx);
352 return NT_STATUS_OK;
355 for (i = 0; i < res[0]->elements[0].num_values; i++) {
356 tmp_dn = ldb_dn_from_ldb_val(tmp_ctx, sam_ctx,
357 &res[0]->elements[0].values[i]);
358 tmp_sid = samdb_search_dom_sid(sam_ctx, tmp_ctx, tmp_dn,
359 "objectSid", NULL);
361 status = authsam_expand_nested_groups(sam_ctx, tmp_sid,
362 false, res_sids_ctx, res_sids, num_res_sids);
363 if (!NT_STATUS_IS_OK(status)) {
364 talloc_free(res);
365 talloc_free(tmp_ctx);
366 return status;
370 talloc_free(res);
371 talloc_free(tmp_ctx);
373 return NT_STATUS_OK;
376 _PUBLIC_ NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx,
377 struct ldb_context *sam_ctx,
378 const char *netbios_name,
379 const char *domain_name,
380 struct ldb_dn *domain_dn,
381 struct ldb_message *msg,
382 DATA_BLOB user_sess_key,
383 DATA_BLOB lm_sess_key,
384 struct auth_serversupplied_info **_server_info)
386 NTSTATUS status;
387 struct auth_serversupplied_info *server_info;
388 const char *str;
389 struct dom_sid *tmp_sid;
390 /* SIDs for the account and his primary group */
391 struct dom_sid *account_sid;
392 struct dom_sid *primary_group_sid;
393 /* SID structures for the expanded group memberships */
394 struct dom_sid **groupSIDs = NULL, **groupSIDs_2 = NULL;
395 unsigned int num_groupSIDs = 0, num_groupSIDs_2 = 0, i;
396 uint32_t userAccountControl;
398 server_info = talloc(mem_ctx, struct auth_serversupplied_info);
399 NT_STATUS_HAVE_NO_MEMORY(server_info);
401 account_sid = samdb_result_dom_sid(server_info, msg, "objectSid");
402 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(account_sid, server_info);
404 primary_group_sid = dom_sid_add_rid(server_info,
405 samdb_domain_sid(sam_ctx),
406 samdb_result_uint(msg, "primaryGroupID", ~0));
407 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(primary_group_sid, server_info);
409 /* Expands the primary group */
410 status = authsam_expand_nested_groups(sam_ctx, primary_group_sid, false,
411 server_info, &groupSIDs, &num_groupSIDs);
412 if (!NT_STATUS_IS_OK(status)) {
413 talloc_free(server_info);
414 return status;
417 /* Expands the additional groups */
418 status = authsam_expand_nested_groups(sam_ctx, account_sid, true,
419 server_info, &groupSIDs_2, &num_groupSIDs_2);
420 if (!NT_STATUS_IS_OK(status)) {
421 talloc_free(server_info);
422 return status;
425 /* Merge the two expanded structures (groupSIDs, groupSIDs_2) */
426 for (i = 0; i < num_groupSIDs_2; i++)
427 if (!sids_contains_sid((const struct dom_sid **) groupSIDs,
428 num_groupSIDs, groupSIDs_2[i])) {
429 tmp_sid = dom_sid_dup(server_info, groupSIDs_2[i]);
430 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(tmp_sid, server_info);
431 groupSIDs = talloc_realloc(server_info, groupSIDs,
432 struct dom_sid *, num_groupSIDs + 1);
433 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs,
434 server_info);
435 groupSIDs[num_groupSIDs] = tmp_sid;
436 ++num_groupSIDs;
438 talloc_free(groupSIDs_2);
440 server_info->account_sid = account_sid;
441 server_info->primary_group_sid = primary_group_sid;
443 /* DCs also get SID_NT_ENTERPRISE_DCS */
444 userAccountControl = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);
445 if (userAccountControl & UF_SERVER_TRUST_ACCOUNT) {
446 groupSIDs = talloc_realloc(server_info, groupSIDs, struct dom_sid *,
447 num_groupSIDs+1);
448 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs, server_info);
449 groupSIDs[num_groupSIDs] = dom_sid_parse_talloc(groupSIDs, SID_NT_ENTERPRISE_DCS);
450 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupSIDs[num_groupSIDs], server_info);
451 num_groupSIDs++;
454 server_info->domain_groups = groupSIDs;
455 server_info->n_domain_groups = num_groupSIDs;
457 server_info->account_name = talloc_steal(server_info,
458 samdb_result_string(msg, "sAMAccountName", NULL));
460 server_info->domain_name = talloc_strdup(server_info, domain_name);
461 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->domain_name,
462 server_info);
464 str = samdb_result_string(msg, "displayName", "");
465 server_info->full_name = talloc_strdup(server_info, str);
466 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->full_name, server_info);
468 str = samdb_result_string(msg, "scriptPath", "");
469 server_info->logon_script = talloc_strdup(server_info, str);
470 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->logon_script,
471 server_info);
473 str = samdb_result_string(msg, "profilePath", "");
474 server_info->profile_path = talloc_strdup(server_info, str);
475 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->profile_path,
476 server_info);
478 str = samdb_result_string(msg, "homeDirectory", "");
479 server_info->home_directory = talloc_strdup(server_info, str);
480 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->home_directory,
481 server_info);
483 str = samdb_result_string(msg, "homeDrive", "");
484 server_info->home_drive = talloc_strdup(server_info, str);
485 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->home_drive, server_info);
487 server_info->logon_server = talloc_strdup(server_info, netbios_name);
488 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->logon_server,
489 server_info);
491 server_info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
492 server_info->last_logoff = samdb_result_last_logoff(msg);
493 server_info->acct_expiry = samdb_result_account_expires(msg);
494 server_info->last_password_change = samdb_result_nttime(msg,
495 "pwdLastSet", 0);
496 server_info->allow_password_change
497 = samdb_result_allow_password_change(sam_ctx, mem_ctx,
498 domain_dn, msg, "pwdLastSet");
499 server_info->force_password_change
500 = samdb_result_force_password_change(sam_ctx, mem_ctx,
501 domain_dn, msg);
502 server_info->logon_count = samdb_result_uint(msg, "logonCount", 0);
503 server_info->bad_password_count = samdb_result_uint(msg, "badPwdCount",
506 server_info->acct_flags = samdb_result_acct_flags(sam_ctx, mem_ctx,
507 msg, domain_dn);
509 server_info->user_session_key = data_blob_talloc(server_info,
510 user_sess_key.data,
511 user_sess_key.length);
512 if (user_sess_key.data) {
513 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->user_session_key.data,
514 server_info);
516 server_info->lm_session_key = data_blob_talloc(server_info,
517 lm_sess_key.data,
518 lm_sess_key.length);
519 if (lm_sess_key.data) {
520 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(server_info->lm_session_key.data,
521 server_info);
524 server_info->authenticated = true;
526 *_server_info = server_info;
528 return NT_STATUS_OK;
531 NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
532 TALLOC_CTX *mem_ctx, const char *principal,
533 const char **attrs,
534 struct ldb_dn **domain_dn,
535 struct ldb_message **msg)
537 struct ldb_dn *user_dn;
538 NTSTATUS nt_status;
539 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
540 int ret;
542 if (!tmp_ctx) {
543 return NT_STATUS_NO_MEMORY;
546 nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal,
547 &user_dn, domain_dn);
548 if (!NT_STATUS_IS_OK(nt_status)) {
549 talloc_free(tmp_ctx);
550 return nt_status;
553 /* pull the user attributes */
554 ret = dsdb_search_one(sam_ctx, tmp_ctx, msg, user_dn,
555 LDB_SCOPE_BASE, attrs, DSDB_SEARCH_SHOW_EXTENDED_DN, "(objectClass=*)");
556 if (ret != LDB_SUCCESS) {
557 talloc_free(tmp_ctx);
558 return NT_STATUS_INTERNAL_DB_CORRUPTION;
560 talloc_steal(mem_ctx, *msg);
561 talloc_steal(mem_ctx, *domain_dn);
562 talloc_free(tmp_ctx);
564 return NT_STATUS_OK;