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, void *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;
183 struct ldb_message **msgs_domain;
188 const char *domain_dn = NULL;
190 const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
191 "userAccountControl",
197 /* required for server_info, not access control: */
213 const char *domain_attrs[] = {"flatname", "objectSid"};
216 /* find the domain's DN */
217 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
218 "(|(&(dnsDomain=%s)(objectClass=domainDNS))(&(flatname=%s)(objectclass=domain)))",
219 domain_name, domain_name);
220 if (ret_domain == -1) {
221 return NT_STATUS_INTERNAL_DB_CORRUPTION;
224 if (ret_domain == 0) {
225 DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
227 return NT_STATUS_NO_SUCH_USER;
230 if (ret_domain > 1) {
231 DEBUG(0,("Found %d records matching domain [%s]\n",
232 ret_domain, domain_name));
233 return NT_STATUS_INTERNAL_DB_CORRUPTION;
236 domain_dn = msgs_domain[0]->dn;
239 /* pull the user attributes */
240 ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
241 "(&(sAMAccountName=%s)(objectclass=user))",
244 return NT_STATUS_INTERNAL_DB_CORRUPTION;
248 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
250 return NT_STATUS_NO_SUCH_USER;
254 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
255 return NT_STATUS_INTERNAL_DB_CORRUPTION;
259 const char *domain_sid;
261 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
263 return NT_STATUS_INTERNAL_DB_CORRUPTION;
266 /* find the domain's DN */
267 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
268 "(&(objectSid=%s)(objectclass=domain))",
270 if (ret_domain == -1) {
271 return NT_STATUS_INTERNAL_DB_CORRUPTION;
274 if (ret_domain == 0) {
275 DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
277 return NT_STATUS_NO_SUCH_USER;
280 if (ret_domain > 1) {
281 DEBUG(0,("Found %d records matching domain [%s]\n",
282 ret_domain, domain_sid));
283 return NT_STATUS_INTERNAL_DB_CORRUPTION;
288 *ret_msgs_domain = msgs_domain;
293 static NTSTATUS authsam_authenticate(const struct auth_context *auth_context,
294 TALLOC_CTX *mem_ctx, void *sam_ctx,
295 struct ldb_message **msgs,
296 struct ldb_message **msgs_domain,
297 const struct auth_usersupplied_info *user_info,
298 DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
301 const char *workstation_list;
303 NTTIME must_change_time;
304 NTTIME last_set_time;
305 struct samr_Password *lm_pwd, *nt_pwd;
307 const char *domain_dn = msgs_domain[0]->dn;
309 acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags");
311 /* Quit if the account was locked out. */
312 if (acct_flags & ACB_AUTOLOCK) {
313 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
314 user_info->account_name));
315 return NT_STATUS_ACCOUNT_LOCKED_OUT;
318 nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
319 NT_STATUS_NOT_OK_RETURN(nt_status);
321 nt_status = authsam_password_ok(auth_context, mem_ctx,
322 acct_flags, lm_pwd, nt_pwd,
323 user_info, user_sess_key, lm_sess_key);
324 NT_STATUS_NOT_OK_RETURN(nt_status);
326 acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
327 must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
330 last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
332 workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
334 nt_status = authsam_account_ok(mem_ctx, acct_flags,
344 static NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, void *sam_ctx,
345 struct ldb_message **msgs,
346 struct ldb_message **msgs_domain,
347 DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
348 struct auth_serversupplied_info **_server_info)
350 struct auth_serversupplied_info *server_info;
351 struct ldb_message **group_msgs;
353 const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
354 /* find list of sids */
355 struct dom_sid **groupSIDs = NULL;
356 struct dom_sid *account_sid;
357 struct dom_sid *primary_group_sid;
361 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
363 group_ret = gendb_search(sam_ctx,
364 tmp_ctx, NULL, &group_msgs, group_attrs,
365 "(&(member=%s)(sAMAccountType=*))",
367 if (group_ret == -1) {
368 talloc_free(tmp_ctx);
369 return NT_STATUS_INTERNAL_DB_CORRUPTION;
372 server_info = talloc(mem_ctx, struct auth_serversupplied_info);
373 NT_STATUS_HAVE_NO_MEMORY(server_info);
376 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
377 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
380 /* Need to unroll some nested groups, but not aliases */
381 for (i = 0; i < group_ret; i++) {
382 str = ldb_msg_find_string(group_msgs[i], "objectSid", NULL);
383 groupSIDs[i] = dom_sid_parse_talloc(groupSIDs, str);
384 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
387 talloc_free(tmp_ctx);
389 str = ldb_msg_find_string(msgs[0], "objectSid", NULL);
390 account_sid = dom_sid_parse_talloc(server_info, str);
391 NT_STATUS_HAVE_NO_MEMORY(account_sid);
393 primary_group_sid = dom_sid_dup(server_info, account_sid);
394 NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
396 rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
399 primary_group_sid = groupSIDs[0];
401 primary_group_sid = NULL;
404 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
407 server_info->account_sid = account_sid;
408 server_info->primary_group_sid = primary_group_sid;
410 server_info->n_domain_groups = group_ret;
411 server_info->domain_groups = groupSIDs;
413 server_info->account_name = talloc_reference(server_info, samdb_result_string(msgs[0], "sAMAccountName", NULL));
415 server_info->domain_name = talloc_reference(server_info, samdb_result_string(msgs_domain[0], "flatname", NULL));
417 str = samdb_result_string(msgs[0], "displayName", "");
418 server_info->full_name = talloc_strdup(server_info, str);
419 NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
421 str = samdb_result_string(msgs[0], "scriptPath", "");
422 server_info->logon_script = talloc_strdup(server_info, str);
423 NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
425 str = samdb_result_string(msgs[0], "profilePath", "");
426 server_info->profile_path = talloc_strdup(server_info, str);
427 NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
429 str = samdb_result_string(msgs[0], "homeDirectory", "");
430 server_info->home_directory = talloc_strdup(server_info, str);
431 NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
433 str = samdb_result_string(msgs[0], "homeDrive", "");
434 server_info->home_drive = talloc_strdup(server_info, str);
435 NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
437 server_info->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
438 server_info->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
439 server_info->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
440 server_info->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
442 server_info->allow_password_change = samdb_result_allow_password_change(sam_ctx, mem_ctx,
443 msgs_domain[0]->dn, msgs[0], "pwdLastSet");
444 server_info->force_password_change = samdb_result_force_password_change(sam_ctx, mem_ctx,
445 msgs_domain[0]->dn, msgs[0], "pwdLastSet");
447 server_info->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
448 server_info->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
450 server_info->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
452 server_info->user_session_key = user_sess_key;
453 server_info->lm_session_key = lm_sess_key;
455 server_info->authenticated = True;
457 *_server_info = server_info;
462 NTSTATUS sam_get_server_info(TALLOC_CTX *mem_ctx, const char *account_name, const char *domain_name,
463 DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
464 struct auth_serversupplied_info **server_info)
468 struct ldb_message **msgs;
469 struct ldb_message **domain_msgs;
472 sam_ctx = samdb_connect(mem_ctx);
473 if (sam_ctx == NULL) {
474 return NT_STATUS_INVALID_SYSTEM_SERVICE;
477 nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain_name, &msgs, &domain_msgs);
478 NT_STATUS_NOT_OK_RETURN(nt_status);
480 nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
481 user_sess_key, lm_sess_key,
483 NT_STATUS_NOT_OK_RETURN(nt_status);
486 talloc_free(domain_msgs);
491 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
494 const struct auth_usersupplied_info *user_info,
495 struct auth_serversupplied_info **server_info)
498 const char *account_name = user_info->account_name;
499 struct ldb_message **msgs;
500 struct ldb_message **domain_msgs;
502 DATA_BLOB user_sess_key, lm_sess_key;
504 if (!account_name || !*account_name) {
506 return NT_STATUS_NOT_IMPLEMENTED;
509 sam_ctx = samdb_connect(mem_ctx);
510 if (sam_ctx == NULL) {
511 return NT_STATUS_INVALID_SYSTEM_SERVICE;
514 nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain, &msgs, &domain_msgs);
515 NT_STATUS_NOT_OK_RETURN(nt_status);
517 nt_status = authsam_authenticate(ctx->auth_ctx, mem_ctx, sam_ctx, msgs, domain_msgs, user_info,
518 &user_sess_key, &lm_sess_key);
519 NT_STATUS_NOT_OK_RETURN(nt_status);
521 nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
522 user_sess_key, lm_sess_key,
524 NT_STATUS_NOT_OK_RETURN(nt_status);
527 talloc_free(domain_msgs);
532 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
534 const struct auth_usersupplied_info *user_info,
535 struct auth_serversupplied_info **server_info)
537 return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
540 /****************************************************************************
541 Check SAM security (above) but with a few extra checks.
542 ****************************************************************************/
543 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
545 const struct auth_usersupplied_info *user_info,
546 struct auth_serversupplied_info **server_info)
549 BOOL is_local_name, is_my_domain;
551 is_local_name = is_myname(user_info->domain_name);
552 is_my_domain = strequal(user_info->domain_name, lp_workgroup());
554 /* check whether or not we service this domain/workgroup name */
555 switch (lp_server_role()) {
556 case ROLE_STANDALONE:
557 domain = lp_netbios_name();
559 case ROLE_DOMAIN_MEMBER:
560 if (!is_local_name) {
561 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
562 user_info->domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
563 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
564 return NT_STATUS_NOT_IMPLEMENTED;
566 domain = lp_netbios_name();
568 case ROLE_DOMAIN_PDC:
569 case ROLE_DOMAIN_BDC:
570 if (!is_local_name && !is_my_domain) {
571 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
572 user_info->domain_name));
573 return NT_STATUS_NOT_IMPLEMENTED;
575 domain = lp_workgroup();
578 DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
579 return NT_STATUS_NOT_IMPLEMENTED;
582 return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
585 static const struct auth_operations sam_ignoredomain_ops = {
586 .name = "sam_ignoredomain",
587 .get_challenge = auth_get_challenge_not_implemented,
588 .check_password = authsam_ignoredomain_check_password
591 static const struct auth_operations sam_ops = {
593 .get_challenge = auth_get_challenge_not_implemented,
594 .check_password = authsam_check_password
597 NTSTATUS auth_sam_init(void)
601 ret = auth_register(&sam_ops);
602 if (!NT_STATUS_IS_OK(ret)) {
603 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
607 ret = auth_register(&sam_ignoredomain_ops);
608 if (!NT_STATUS_IS_OK(ret)) {
609 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));