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
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define DBGC_CLASS DBGC_AUTH
27 /****************************************************************************
28 Do a specific test for an smb password being correct, given a smb_password and
29 the lanman and NT responses.
30 ****************************************************************************/
32 static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
36 const struct samr_Password *lm_pwd,
37 const struct samr_Password *nt_pwd,
38 const struct auth_usersupplied_info *user_info,
39 DATA_BLOB *user_sess_key,
40 DATA_BLOB *lm_sess_key)
42 if (acct_flags & ACB_PWNOTREQ) {
43 if (lp_null_passwords()) {
44 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
48 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
50 return NT_STATUS_LOGON_FAILURE;
54 return ntlm_password_check(mem_ctx, &auth_context->challenge,
55 &user_info->lm_resp, &user_info->nt_resp,
56 &user_info->lm_interactive_password,
57 &user_info->nt_interactive_password,
59 user_info->smb_name.str,
60 user_info->client_domain.str,
61 lm_pwd->hash, nt_pwd->hash, user_sess_key, lm_sess_key);
65 /****************************************************************************
66 Do a specific test for a SAM_ACCOUNT being vaild for this connection
67 (ie not disabled, expired and the like).
68 ****************************************************************************/
70 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
74 NTTIME *must_change_time,
75 NTTIME *last_set_time,
76 const char *workstation_list,
77 const struct auth_usersupplied_info *user_info)
79 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n", username));
81 /* Quit if the account was disabled. */
82 if (acct_flags & ACB_DISABLED) {
83 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", username));
84 return NT_STATUS_ACCOUNT_DISABLED;
87 /* Quit if the account was locked out. */
88 if (acct_flags & ACB_AUTOLOCK) {
89 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", username));
90 return NT_STATUS_ACCOUNT_LOCKED_OUT;
93 /* Test account expire time */
94 if ((*acct_expiry) != -1 && time(NULL) > nt_time_to_unix(*acct_expiry)) {
95 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", username));
96 DEBUG(3,("sam_account_ok: Account expired at '%s'.\n",
97 nt_time_string(mem_ctx, *acct_expiry)));
98 return NT_STATUS_ACCOUNT_EXPIRED;
101 if (!(acct_flags & ACB_PWNOEXP)) {
103 /* check for immediate expiry "must change at next logon" */
104 if (*must_change_time == 0 && *last_set_time != 0) {
105 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
107 return NT_STATUS_PASSWORD_MUST_CHANGE;
110 /* check for expired password */
111 if ((*must_change_time) != 0 && nt_time_to_unix(*must_change_time) < time(NULL)) {
112 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
114 DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
115 nt_time_string(mem_ctx, *must_change_time)));
116 return NT_STATUS_PASSWORD_EXPIRED;
120 /* Test workstation. Workstation list is comma separated. */
122 if (workstation_list && *workstation_list) {
123 BOOL invalid_ws = True;
124 const char *s = workstation_list;
128 while (next_token(&s, tok, ",", sizeof(tok))) {
129 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
130 tok, user_info->wksta_name.str, user_info->wksta_name.len));
132 if(strequal(tok, user_info->wksta_name.str)) {
139 return NT_STATUS_INVALID_WORKSTATION;
142 if (acct_flags & ACB_DOMTRUST) {
143 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", username));
144 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
147 if (acct_flags & ACB_SVRTRUST) {
148 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", username));
149 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
152 if (acct_flags & ACB_WSTRUST) {
153 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", username));
154 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
160 /****************************************************************************
161 check if a username/password is OK assuming the password is a 24 byte
162 SMB hash supplied in the user_info structure
163 return an NT_STATUS constant.
164 ****************************************************************************/
166 static NTSTATUS check_sam_security(const struct auth_context *auth_context,
167 void *my_private_data,
169 const struct auth_usersupplied_info *user_info,
170 struct auth_serversupplied_info **server_info)
172 struct ldb_message **msgs;
173 struct ldb_message **msgs_domain;
175 char *username = user_info->internal_username.str;
177 const char *workstation_list;
179 NTTIME must_change_time;
180 NTTIME last_set_time;
185 const char *domain_dn;
186 const char *domain_sid;
189 DATA_BLOB user_sess_key = data_blob(NULL, 0);
190 DATA_BLOB lm_sess_key = data_blob(NULL, 0);
191 struct samr_Password *lm_pwd, *nt_pwd;
193 const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
194 "userAccountControl",
200 /* required for server_info, not access control: */
215 const char *domain_attrs[] = {"name"};
217 if (!user_info || !auth_context) {
218 return NT_STATUS_UNSUCCESSFUL;
221 sam_ctx = samdb_connect();
222 if (sam_ctx == NULL) {
223 return NT_STATUS_INVALID_SYSTEM_SERVICE;
225 /* pull the user attributes */
226 ret = samdb_search(sam_ctx, mem_ctx, NULL, &msgs, attrs,
227 "(&(sAMAccountName=%s)(objectclass=user))",
231 DEBUG(3,("check_sam_security: Couldn't find user [%s] in passdb file.\n",
233 samdb_close(sam_ctx);
234 return NT_STATUS_NO_SUCH_USER;
238 DEBUG(1,("Found %d records matching user [%s]\n", ret, username));
239 samdb_close(sam_ctx);
240 return NT_STATUS_INTERNAL_DB_CORRUPTION;
243 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
245 samdb_close(sam_ctx);
246 return NT_STATUS_INTERNAL_DB_CORRUPTION;
249 /* find the domain's DN */
250 ret_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
251 "(&(objectSid=%s)(objectclass=domain))",
254 if (ret_domain == 0) {
255 DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
257 samdb_close(sam_ctx);
258 return NT_STATUS_NO_SUCH_USER;
261 if (ret_domain > 1) {
262 DEBUG(1,("Found %d records matching domain [%s]\n",
263 ret_domain, domain_sid));
264 samdb_close(sam_ctx);
265 return NT_STATUS_INTERNAL_DB_CORRUPTION;
268 domain_dn = msgs_domain[0]->dn;
270 acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags");
272 /* Quit if the account was locked out. */
273 if (acct_flags & ACB_AUTOLOCK) {
274 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
276 samdb_close(sam_ctx);
277 return NT_STATUS_ACCOUNT_LOCKED_OUT;
280 if (!NT_STATUS_IS_OK(nt_status = samdb_result_passwords(mem_ctx, msgs[0],
281 &lm_pwd, &nt_pwd))) {
285 nt_status = sam_password_ok(auth_context, mem_ctx,
286 username, acct_flags,
288 user_info, &user_sess_key, &lm_sess_key);
290 if (!NT_STATUS_IS_OK(nt_status)) {
291 samdb_close(sam_ctx);
295 acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
296 must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
299 last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
301 workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
303 nt_status = sam_account_ok(mem_ctx, username, acct_flags,
310 if (!NT_STATUS_IS_OK(nt_status)) {
311 samdb_close(sam_ctx);
315 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, username))) {
316 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
317 samdb_close(sam_ctx);
322 struct ldb_message **group_msgs;
323 char *dn = msgs[0]->dn;
325 const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
326 /* find list of sids */
327 struct dom_sid **groupSIDs = NULL;
328 struct dom_sid *user_sid;
329 struct dom_sid *primary_group_sid;
333 group_ret = samdb_search(sam_ctx,
334 mem_ctx, NULL, &group_msgs, group_attrs,
335 "(&(member=%s)(sAMAccountType=*))",
339 !(groupSIDs = talloc_realloc_p((*server_info)->mem_ctx, groupSIDs,
340 struct dom_sid *, group_ret))) {
341 talloc_destroy((*server_info)->mem_ctx);
342 samdb_close(sam_ctx);
343 return NT_STATUS_NO_MEMORY;
346 /* Need to unroll some nested groups, but not aliases */
347 for (i = 0; i < group_ret; i++) {
348 sidstr = ldb_msg_find_string(group_msgs[i], "objectSid", NULL);
349 groupSIDs[i] = dom_sid_parse_talloc((*server_info)->mem_ctx, sidstr);
352 sidstr = ldb_msg_find_string(msgs[0], "objectSid", NULL);
353 user_sid = dom_sid_parse_talloc((*server_info)->mem_ctx, sidstr);
354 primary_group_sid = dom_sid_parse_talloc((*server_info)->mem_ctx, sidstr);
355 primary_group_sid->sub_auths[primary_group_sid->num_auths-1]
356 = samdb_result_uint(msgs[0], "primaryGroupID", 0);
358 (*server_info)->user_sid = user_sid;
359 (*server_info)->primary_group_sid = primary_group_sid;
361 (*server_info)->n_domain_groups = group_ret;
362 (*server_info)->domain_groups = groupSIDs;
365 (*server_info)->account_name
366 = talloc_strdup((*server_info)->mem_ctx,
367 samdb_result_string(msgs[0], "sAMAccountName", ""));
369 (*server_info)->domain
370 = talloc_strdup((*server_info)->mem_ctx,
371 samdb_result_string(msgs_domain[0], "name", ""));
373 (*server_info)->full_name
374 = talloc_strdup((*server_info)->mem_ctx,
375 samdb_result_string(msgs[0], "displayName", ""));
377 (*server_info)->logon_script
378 = talloc_strdup((*server_info)->mem_ctx,
379 samdb_result_string(msgs[0], "scriptPath", ""));
380 (*server_info)->profile_path
381 = talloc_strdup((*server_info)->mem_ctx,
382 samdb_result_string(msgs[0], "profilePath", ""));
383 (*server_info)->home_directory
384 = talloc_strdup((*server_info)->mem_ctx,
385 samdb_result_string(msgs[0], "homeDirectory", ""));
387 (*server_info)->home_drive
388 = talloc_strdup((*server_info)->mem_ctx,
389 samdb_result_string(msgs[0], "homeDrive", ""));
391 (*server_info)->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
392 (*server_info)->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
393 (*server_info)->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
394 (*server_info)->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
395 (*server_info)->allow_password_change
396 = samdb_result_allow_password_change(sam_ctx, mem_ctx,
397 domain_dn, msgs[0], "pwdLastSet");
398 (*server_info)->allow_password_change
399 = samdb_result_force_password_change(sam_ctx, mem_ctx,
400 domain_dn, msgs[0], "pwdLastSet");
402 (*server_info)->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
403 (*server_info)->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
405 (*server_info)->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
407 (*server_info)->guest = False;
409 (*server_info)->user_session_key = user_sess_key;
410 (*server_info)->lm_session_key = lm_sess_key;
412 if (!(*server_info)->account_name
413 || !(*server_info)->full_name
414 || !(*server_info)->logon_script
415 || !(*server_info)->profile_path
416 || !(*server_info)->home_directory
417 || !(*server_info)->home_drive) {
418 talloc_destroy((*server_info)->mem_ctx);
419 return NT_STATUS_NO_MEMORY;
422 samdb_close(sam_ctx);
427 /* module initialisation */
428 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context,
430 struct auth_methods **auth_method)
432 if (!make_auth_methods(auth_context, auth_method)) {
433 return NT_STATUS_NO_MEMORY;
436 (*auth_method)->auth = check_sam_security;
437 (*auth_method)->name = "sam_ignoredomain";
442 /****************************************************************************
443 Check SAM security (above) but with a few extra checks.
444 ****************************************************************************/
446 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
447 void *my_private_data,
449 const struct auth_usersupplied_info *user_info,
450 struct auth_serversupplied_info **server_info)
453 if (!user_info || !auth_context) {
454 return NT_STATUS_LOGON_FAILURE;
457 /* If we are a domain member, we must not
458 attempt to check the password locally,
459 unless it is one of our aliases. */
461 if (!is_myname(user_info->domain.str)) {
462 DEBUG(7,("The requested user domain is not the local server name. [%s]\\[%s]\n",
463 user_info->domain.str,user_info->internal_username.str));
464 return NT_STATUS_NO_SUCH_USER;
467 return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
470 /* module initialisation */
471 static NTSTATUS auth_init_sam(struct auth_context *auth_context,
473 struct auth_methods **auth_method)
475 if (!make_auth_methods(auth_context, auth_method)) {
476 return NT_STATUS_NO_MEMORY;
479 (*auth_method)->auth = check_samstrict_security;
480 (*auth_method)->name = "sam";
484 NTSTATUS auth_sam_init(void)
487 struct auth_operations ops;
490 ops.init = auth_init_sam;
491 ret = register_backend("auth", &ops);
492 if (!NT_STATUS_IS_OK(ret)) {
493 DEBUG(0,("Failed to register '%s' auth backend!\n",
498 ops.name = "sam_ignoredomain";
499 ops.init = auth_init_sam_ignoredomain;
500 ret = register_backend("auth", &ops);
501 if (!NT_STATUS_IS_OK(ret)) {
502 DEBUG(0,("Failed to register '%s' auth backend!\n",