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
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "librpc/gen_ndr/ndr_samr.h"
25 #include "system/time.h"
26 #include "auth/auth.h"
27 #include "lib/ldb/include/ldb.h"
30 /****************************************************************************
31 Do a specific test for an smb password being correct, given a smb_password and
32 the lanman and NT responses.
33 ****************************************************************************/
34 static NTSTATUS authsam_password_ok(const struct auth_context *auth_context,
37 const struct samr_Password *lm_pwd,
38 const struct samr_Password *nt_pwd,
39 const struct auth_usersupplied_info *user_info,
40 DATA_BLOB *user_sess_key,
41 DATA_BLOB *lm_sess_key)
45 if (acct_flags & ACB_PWNOTREQ) {
46 if (lp_null_passwords()) {
47 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
48 user_info->account_name));
51 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
52 user_info->account_name));
53 return NT_STATUS_LOGON_FAILURE;
57 status = ntlm_password_check(mem_ctx, &auth_context->challenge.data,
58 &user_info->lm_resp, &user_info->nt_resp,
59 &user_info->lm_interactive_password,
60 &user_info->nt_interactive_password,
61 user_info->account_name,
62 user_info->client.account_name,
63 user_info->client.domain_name,
64 lm_pwd->hash, nt_pwd->hash,
65 user_sess_key, lm_sess_key);
66 NT_STATUS_NOT_OK_RETURN(status);
68 if (user_sess_key && user_sess_key->data) {
69 talloc_steal(auth_context, user_sess_key->data);
71 if (lm_sess_key && lm_sess_key->data) {
72 talloc_steal(auth_context, lm_sess_key->data);
79 /****************************************************************************
80 Do a specific test for a SAM_ACCOUNT being vaild for this connection
81 (ie not disabled, expired and the like).
82 ****************************************************************************/
83 static NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
86 NTTIME must_change_time,
88 const char *workstation_list,
89 const struct auth_usersupplied_info *user_info)
91 DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", user_info->account_name));
93 /* Quit if the account was disabled. */
94 if (acct_flags & ACB_DISABLED) {
95 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", user_info->account_name));
96 return NT_STATUS_ACCOUNT_DISABLED;
99 /* Quit if the account was locked out. */
100 if (acct_flags & ACB_AUTOLOCK) {
101 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", user_info->account_name));
102 return NT_STATUS_ACCOUNT_LOCKED_OUT;
105 /* Test account expire time */
106 if ((acct_expiry) != -1 && time(NULL) > nt_time_to_unix(acct_expiry)) {
107 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", user_info->account_name));
108 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
109 nt_time_string(mem_ctx, acct_expiry)));
110 return NT_STATUS_ACCOUNT_EXPIRED;
113 if (!(acct_flags & ACB_PWNOEXP)) {
114 /* check for immediate expiry "must change at next logon" */
115 if (must_change_time == 0 && last_set_time != 0) {
116 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
117 user_info->account_name));
118 return NT_STATUS_PASSWORD_MUST_CHANGE;
121 /* check for expired password */
122 if ((must_change_time) != 0 && nt_time_to_unix(must_change_time) < time(NULL)) {
123 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
124 user_info->account_name));
125 DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
126 nt_time_string(mem_ctx, must_change_time)));
127 return NT_STATUS_PASSWORD_EXPIRED;
131 /* Test workstation. Workstation list is comma separated. */
132 if (workstation_list && *workstation_list) {
133 BOOL invalid_ws = True;
134 const char *s = workstation_list;
138 while (next_token(&s, tok, ",", sizeof(tok))) {
139 DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
140 tok, user_info->workstation_name));
142 if (strequal(tok, user_info->workstation_name)) {
150 return NT_STATUS_INVALID_WORKSTATION;
154 if (acct_flags & ACB_DOMTRUST) {
155 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", user_info->account_name));
156 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
159 if (acct_flags & ACB_SVRTRUST) {
160 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", user_info->account_name));
161 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
164 if (acct_flags & ACB_WSTRUST) {
165 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", user_info->account_name));
166 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
172 /****************************************************************************
173 Look for the specified user in the sam, return ldb result structures
174 ****************************************************************************/
176 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
177 const char *account_name,
178 const char *domain_name,
179 struct ldb_message ***ret_msgs,
180 struct ldb_message ***ret_msgs_domain)
182 struct ldb_message **msgs_tmp;
183 struct ldb_message **msgs;
184 struct ldb_message **msgs_domain;
189 const char *domain_dn = NULL;
191 const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
192 "userAccountControl",
198 /* required for server_info, not access control: */
214 const char *domain_attrs[] = {"nETBIOSName", "nCName"};
217 /* find the domain's DN */
218 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
219 "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
220 domain_name, domain_name);
221 if (ret_domain == -1) {
222 return NT_STATUS_INTERNAL_DB_CORRUPTION;
225 if (ret_domain == 0) {
226 DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
228 return NT_STATUS_NO_SUCH_USER;
231 if (ret_domain > 1) {
232 DEBUG(0,("Found %d records matching domain [%s]\n",
233 ret_domain, domain_name));
234 return NT_STATUS_INTERNAL_DB_CORRUPTION;
237 domain_dn = samdb_result_string(msgs_domain[0], "nCName", NULL);
240 /* pull the user attributes */
241 ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
242 "(&(sAMAccountName=%s)(objectclass=user))",
245 return NT_STATUS_INTERNAL_DB_CORRUPTION;
249 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
251 return NT_STATUS_NO_SUCH_USER;
255 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
256 return NT_STATUS_INTERNAL_DB_CORRUPTION;
260 struct dom_sid *domain_sid;
262 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
264 return NT_STATUS_INTERNAL_DB_CORRUPTION;
267 /* find the domain's DN */
268 ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
269 "(&(objectSid=%s)(objectclass=domain))",
270 ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
272 return NT_STATUS_INTERNAL_DB_CORRUPTION;
276 DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
277 dom_sid_string(mem_ctx, domain_sid)));
278 return NT_STATUS_NO_SUCH_USER;
282 DEBUG(0,("Found %d records matching domain_sid [%s]\n",
283 ret, dom_sid_string(mem_ctx, domain_sid)));
284 return NT_STATUS_INTERNAL_DB_CORRUPTION;
287 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
288 "(nCName=%s)", msgs_tmp[0]->dn);
290 if (ret_domain == -1) {
291 return NT_STATUS_INTERNAL_DB_CORRUPTION;
294 if (ret_domain == 0) {
295 DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
297 return NT_STATUS_NO_SUCH_USER;
300 if (ret_domain > 1) {
301 DEBUG(0,("Found %d records matching domain [%s]\n",
302 ret_domain, msgs_tmp[0]->dn));
303 return NT_STATUS_INTERNAL_DB_CORRUPTION;
309 *ret_msgs_domain = msgs_domain;
314 static NTSTATUS authsam_authenticate(const struct auth_context *auth_context,
315 TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
316 struct ldb_message **msgs,
317 struct ldb_message **msgs_domain,
318 const struct auth_usersupplied_info *user_info,
319 DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
322 const char *workstation_list;
324 NTTIME must_change_time;
325 NTTIME last_set_time;
326 struct samr_Password *lm_pwd, *nt_pwd;
328 const char *domain_dn = samdb_result_string(msgs_domain[0], "nCName", "");
330 acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags");
332 /* Quit if the account was locked out. */
333 if (acct_flags & ACB_AUTOLOCK) {
334 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
335 user_info->account_name));
336 return NT_STATUS_ACCOUNT_LOCKED_OUT;
339 nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
340 NT_STATUS_NOT_OK_RETURN(nt_status);
342 nt_status = authsam_password_ok(auth_context, mem_ctx,
343 acct_flags, lm_pwd, nt_pwd,
344 user_info, user_sess_key, lm_sess_key);
345 NT_STATUS_NOT_OK_RETURN(nt_status);
347 acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
348 must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
351 last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
353 workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
355 nt_status = authsam_account_ok(mem_ctx, acct_flags,
365 static NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
366 struct ldb_message **msgs,
367 struct ldb_message **msgs_domain,
368 DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
369 struct auth_serversupplied_info **_server_info)
371 struct auth_serversupplied_info *server_info;
372 struct ldb_message **group_msgs;
374 const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
375 /* find list of sids */
376 struct dom_sid **groupSIDs = NULL;
377 struct dom_sid *account_sid;
378 struct dom_sid *primary_group_sid;
379 const char *str, *ncname;
382 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
384 group_ret = gendb_search(sam_ctx,
385 tmp_ctx, NULL, &group_msgs, group_attrs,
386 "(&(member=%s)(sAMAccountType=*))",
388 if (group_ret == -1) {
389 talloc_free(tmp_ctx);
390 return NT_STATUS_INTERNAL_DB_CORRUPTION;
393 server_info = talloc(mem_ctx, struct auth_serversupplied_info);
394 NT_STATUS_HAVE_NO_MEMORY(server_info);
397 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
398 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
401 /* Need to unroll some nested groups, but not aliases */
402 for (i = 0; i < group_ret; i++) {
403 groupSIDs[i] = samdb_result_dom_sid(groupSIDs,
404 group_msgs[i], "objectSid");
405 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
408 talloc_free(tmp_ctx);
410 account_sid = samdb_result_dom_sid(server_info, msgs[0], "objectSid");
411 NT_STATUS_HAVE_NO_MEMORY(account_sid);
413 primary_group_sid = dom_sid_dup(server_info, account_sid);
414 NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
416 rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
419 primary_group_sid = groupSIDs[0];
421 primary_group_sid = NULL;
424 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
427 server_info->account_sid = account_sid;
428 server_info->primary_group_sid = primary_group_sid;
430 server_info->n_domain_groups = group_ret;
431 server_info->domain_groups = groupSIDs;
433 server_info->account_name = talloc_steal(server_info, samdb_result_string(msgs[0], "sAMAccountName", NULL));
435 server_info->domain_name = talloc_steal(server_info, samdb_result_string(msgs_domain[0], "nETBIOSName", NULL));
437 str = samdb_result_string(msgs[0], "displayName", "");
438 server_info->full_name = talloc_strdup(server_info, str);
439 NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
441 str = samdb_result_string(msgs[0], "scriptPath", "");
442 server_info->logon_script = talloc_strdup(server_info, str);
443 NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
445 str = samdb_result_string(msgs[0], "profilePath", "");
446 server_info->profile_path = talloc_strdup(server_info, str);
447 NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
449 str = samdb_result_string(msgs[0], "homeDirectory", "");
450 server_info->home_directory = talloc_strdup(server_info, str);
451 NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
453 str = samdb_result_string(msgs[0], "homeDrive", "");
454 server_info->home_drive = talloc_strdup(server_info, str);
455 NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
457 server_info->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
458 server_info->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
459 server_info->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
460 server_info->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
462 ncname = samdb_result_string(msgs_domain[0], "nCName", "");
464 server_info->allow_password_change = samdb_result_allow_password_change(sam_ctx, mem_ctx,
465 ncname, msgs[0], "pwdLastSet");
466 server_info->force_password_change = samdb_result_force_password_change(sam_ctx, mem_ctx,
467 ncname, msgs[0], "pwdLastSet");
469 server_info->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
470 server_info->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
472 server_info->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
474 server_info->user_session_key = user_sess_key;
475 server_info->lm_session_key = lm_sess_key;
477 server_info->authenticated = True;
479 *_server_info = server_info;
484 NTSTATUS sam_get_server_info(TALLOC_CTX *mem_ctx, const char *account_name, const char *domain_name,
485 DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
486 struct auth_serversupplied_info **server_info)
490 struct ldb_message **msgs;
491 struct ldb_message **domain_msgs;
494 sam_ctx = samdb_connect(mem_ctx);
495 if (sam_ctx == NULL) {
496 return NT_STATUS_INVALID_SYSTEM_SERVICE;
499 nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain_name, &msgs, &domain_msgs);
500 NT_STATUS_NOT_OK_RETURN(nt_status);
502 nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
503 user_sess_key, lm_sess_key,
505 NT_STATUS_NOT_OK_RETURN(nt_status);
508 talloc_free(domain_msgs);
513 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
516 const struct auth_usersupplied_info *user_info,
517 struct auth_serversupplied_info **server_info)
520 const char *account_name = user_info->account_name;
521 struct ldb_message **msgs;
522 struct ldb_message **domain_msgs;
523 struct ldb_context *sam_ctx;
524 DATA_BLOB user_sess_key, lm_sess_key;
526 if (!account_name || !*account_name) {
528 return NT_STATUS_NOT_IMPLEMENTED;
531 sam_ctx = samdb_connect(mem_ctx);
532 if (sam_ctx == NULL) {
533 return NT_STATUS_INVALID_SYSTEM_SERVICE;
536 nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain, &msgs, &domain_msgs);
537 NT_STATUS_NOT_OK_RETURN(nt_status);
539 nt_status = authsam_authenticate(ctx->auth_ctx, mem_ctx, sam_ctx, msgs, domain_msgs, user_info,
540 &user_sess_key, &lm_sess_key);
541 NT_STATUS_NOT_OK_RETURN(nt_status);
543 nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
544 user_sess_key, lm_sess_key,
546 NT_STATUS_NOT_OK_RETURN(nt_status);
549 talloc_free(domain_msgs);
554 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
556 const struct auth_usersupplied_info *user_info,
557 struct auth_serversupplied_info **server_info)
559 return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
562 /****************************************************************************
563 Check SAM security (above) but with a few extra checks.
564 ****************************************************************************/
565 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
567 const struct auth_usersupplied_info *user_info,
568 struct auth_serversupplied_info **server_info)
571 BOOL is_local_name, is_my_domain;
573 is_local_name = is_myname(user_info->domain_name);
574 is_my_domain = strequal(user_info->domain_name, lp_workgroup());
576 /* check whether or not we service this domain/workgroup name */
577 switch (lp_server_role()) {
578 case ROLE_STANDALONE:
579 domain = lp_netbios_name();
581 case ROLE_DOMAIN_MEMBER:
582 if (!is_local_name) {
583 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
584 user_info->domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
585 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
586 return NT_STATUS_NOT_IMPLEMENTED;
588 domain = lp_netbios_name();
590 case ROLE_DOMAIN_PDC:
591 case ROLE_DOMAIN_BDC:
592 if (!is_local_name && !is_my_domain) {
593 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
594 user_info->domain_name));
595 return NT_STATUS_NOT_IMPLEMENTED;
597 domain = lp_workgroup();
600 DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
601 return NT_STATUS_NOT_IMPLEMENTED;
604 return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
607 static const struct auth_operations sam_ignoredomain_ops = {
608 .name = "sam_ignoredomain",
609 .get_challenge = auth_get_challenge_not_implemented,
610 .check_password = authsam_ignoredomain_check_password
613 static const struct auth_operations sam_ops = {
615 .get_challenge = auth_get_challenge_not_implemented,
616 .check_password = authsam_check_password
619 NTSTATUS auth_sam_init(void)
623 ret = auth_register(&sam_ops);
624 if (!NT_STATUS_IS_OK(ret)) {
625 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
629 ret = auth_register(&sam_ignoredomain_ops);
630 if (!NT_STATUS_IS_OK(ret)) {
631 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));