2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Tridgell 1992-2000
5 Copyright (C) Luke Kenneth Casson Leighton 1996-2000
6 Copyright (C) Andrew Bartlett 2001-2003
7 Copyright (C) Gerald Carter 2003
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/>.
26 #define DBGC_CLASS DBGC_AUTH
28 /****************************************************************************
29 Do a specific test for an smb password being correct, given a smb_password and
30 the lanman and NT responses.
31 ****************************************************************************/
33 static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
36 const auth_usersupplied_info *user_info,
37 DATA_BLOB *user_sess_key,
38 DATA_BLOB *lm_sess_key)
41 const uint8 *lm_pw, *nt_pw;
42 const char *username = pdb_get_username(sampass);
44 acct_ctrl = pdb_get_acct_ctrl(sampass);
45 if (acct_ctrl & ACB_PWNOTREQ) {
46 if (lp_null_passwords()) {
47 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
50 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
51 return NT_STATUS_LOGON_FAILURE;
55 lm_pw = pdb_get_lanman_passwd(sampass);
56 nt_pw = pdb_get_nt_passwd(sampass);
58 return ntlm_password_check(mem_ctx, &auth_context->challenge,
59 &user_info->lm_resp, &user_info->nt_resp,
60 &user_info->lm_interactive_pwd, &user_info->nt_interactive_pwd,
63 user_info->client_domain,
64 lm_pw, nt_pw, user_sess_key, lm_sess_key);
67 /****************************************************************************
68 Check if a user is allowed to logon at this time. Note this is the
69 servers local time, as logon hours are just specified as a weekly
71 ****************************************************************************/
73 static bool logon_hours_ok(struct samu *sampass)
75 /* In logon hours first bit is Sunday from 12AM to 1AM */
80 uint8 bitmask, bitpos;
82 hours = pdb_get_hours(sampass);
84 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
88 lasttime = time(NULL);
89 utctime = gmtime(&lasttime);
91 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
92 pdb_get_username(sampass) ));
96 /* find the corresponding byte and bit */
97 bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
98 bitmask = 1 << (bitpos % 8);
100 if (! (hours[bitpos/8] & bitmask)) {
101 struct tm *t = localtime(&lasttime);
103 asct = "INVALID TIME";
107 asct = "INVALID TIME";
111 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
112 "logon at this time (%s).\n",
113 pdb_get_username(sampass), asct ));
117 asct = asctime(utctime);
118 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
119 pdb_get_username(sampass), asct ? asct : "UNKNOWN TIME" ));
124 /****************************************************************************
125 Do a specific test for a struct samu being vaild for this connection
126 (ie not disabled, expired and the like).
127 ****************************************************************************/
129 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
130 struct samu *sampass,
131 const auth_usersupplied_info *user_info)
133 uint32 acct_ctrl = pdb_get_acct_ctrl(sampass);
134 char *workstation_list;
137 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
139 /* Quit if the account was disabled. */
140 if (acct_ctrl & ACB_DISABLED) {
141 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
142 return NT_STATUS_ACCOUNT_DISABLED;
145 /* Quit if the account was locked out. */
146 if (acct_ctrl & ACB_AUTOLOCK) {
147 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
148 return NT_STATUS_ACCOUNT_LOCKED_OUT;
151 /* Quit if the account is not allowed to logon at this time. */
152 if (! logon_hours_ok(sampass)) {
153 return NT_STATUS_INVALID_LOGON_HOURS;
156 /* Test account expire time */
158 kickoff_time = pdb_get_kickoff_time(sampass);
159 if (kickoff_time != 0 && time(NULL) > kickoff_time) {
160 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
161 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
162 return NT_STATUS_ACCOUNT_EXPIRED;
165 if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP) && !(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) {
166 time_t must_change_time = pdb_get_pass_must_change_time(sampass);
167 time_t last_set_time = pdb_get_pass_last_set_time(sampass);
169 /* check for immediate expiry "must change at next logon" */
170 if (last_set_time == 0) {
171 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
172 return NT_STATUS_PASSWORD_MUST_CHANGE;
175 /* check for expired password */
176 if (must_change_time < time(NULL) && must_change_time != 0) {
177 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
178 DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
179 return NT_STATUS_PASSWORD_EXPIRED;
183 /* Test workstation. Workstation list is comma separated. */
185 workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
186 if (!workstation_list)
187 return NT_STATUS_NO_MEMORY;
189 if (*workstation_list) {
190 bool invalid_ws = True;
192 const char *s = workstation_list;
194 const char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name);
195 if (machine_name == NULL)
196 return NT_STATUS_NO_MEMORY;
199 while (next_token(&s, tok, ",", sizeof(tok))) {
200 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
201 tok, user_info->wksta_name));
202 if(strequal(tok, user_info->wksta_name)) {
207 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
208 machine_name, tok + 1));
209 if (user_in_group(machine_name, tok + 1)) {
217 return NT_STATUS_INVALID_WORKSTATION;
220 if (acct_ctrl & ACB_DOMTRUST) {
221 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
222 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
225 if (acct_ctrl & ACB_SVRTRUST) {
226 if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
227 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
228 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
232 if (acct_ctrl & ACB_WSTRUST) {
233 if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
234 DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
235 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
241 /****************************************************************************
242 check if a username/password is OK assuming the password is a 24 byte
243 SMB hash supplied in the user_info structure
244 return an NT_STATUS constant.
245 ****************************************************************************/
247 static NTSTATUS check_sam_security(const struct auth_context *auth_context,
248 void *my_private_data,
250 const auth_usersupplied_info *user_info,
251 auth_serversupplied_info **server_info)
253 struct samu *sampass=NULL;
256 NTSTATUS update_login_attempts_status;
257 DATA_BLOB user_sess_key = data_blob_null;
258 DATA_BLOB lm_sess_key = data_blob_null;
259 bool updated_autolock = False, updated_badpw = False;
261 if (!user_info || !auth_context) {
262 return NT_STATUS_UNSUCCESSFUL;
265 /* the returned struct gets kept on the server_info, by means
266 of a steal further down */
268 if ( !(sampass = samu_new( mem_ctx )) ) {
269 return NT_STATUS_NO_MEMORY;
272 /* get the account information */
275 ret = pdb_getsampwnam(sampass, user_info->internal_username);
279 DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
280 "passdb.\n", user_info->internal_username));
281 TALLOC_FREE(sampass);
282 return NT_STATUS_NO_SUCH_USER;
285 /* see if autolock flag needs to be updated */
286 if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
287 pdb_update_autolock_flag(sampass, &updated_autolock);
288 /* Quit if the account was locked out. */
289 if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
290 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
291 return NT_STATUS_ACCOUNT_LOCKED_OUT;
294 nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
295 user_info, &user_sess_key, &lm_sess_key);
297 /* Notify passdb backend of login success/failure. If not
298 NT_STATUS_OK the backend doesn't like the login */
300 update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
302 if (!NT_STATUS_IS_OK(nt_status)) {
303 if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) &&
304 pdb_get_acct_ctrl(sampass) &ACB_NORMAL &&
305 NT_STATUS_IS_OK(update_login_attempts_status))
307 pdb_increment_bad_password_count(sampass);
308 updated_badpw = True;
310 pdb_update_bad_password_count(sampass,
313 if (updated_autolock || updated_badpw){
315 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
316 DEBUG(1, ("Failed to modify entry.\n"));
319 data_blob_free(&user_sess_key);
320 data_blob_free(&lm_sess_key);
321 TALLOC_FREE(sampass);
325 if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
326 (pdb_get_bad_password_count(sampass) > 0)){
327 pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
328 pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
329 updated_badpw = True;
332 if (updated_autolock || updated_badpw){
334 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
335 DEBUG(1, ("Failed to modify entry.\n"));
339 nt_status = sam_account_ok(mem_ctx, sampass, user_info);
341 if (!NT_STATUS_IS_OK(nt_status)) {
342 TALLOC_FREE(sampass);
343 data_blob_free(&user_sess_key);
344 data_blob_free(&lm_sess_key);
349 nt_status = make_server_info_sam(server_info, sampass);
352 if (!NT_STATUS_IS_OK(nt_status)) {
353 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
354 TALLOC_FREE(sampass);
355 data_blob_free(&user_sess_key);
356 data_blob_free(&lm_sess_key);
360 (*server_info)->user_session_key =
361 data_blob_talloc(*server_info, user_sess_key.data,
362 user_sess_key.length);
363 data_blob_free(&user_sess_key);
365 (*server_info)->lm_session_key =
366 data_blob_talloc(*server_info, lm_sess_key.data,
368 data_blob_free(&lm_sess_key);
370 (*server_info)->was_mapped |= user_info->was_mapped;
375 /* module initialisation */
376 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
378 if (!make_auth_methods(auth_context, auth_method)) {
379 return NT_STATUS_NO_MEMORY;
382 (*auth_method)->auth = check_sam_security;
383 (*auth_method)->name = "sam_ignoredomain";
388 /****************************************************************************
389 Check SAM security (above) but with a few extra checks.
390 ****************************************************************************/
392 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
393 void *my_private_data,
395 const auth_usersupplied_info *user_info,
396 auth_serversupplied_info **server_info)
398 bool is_local_name, is_my_domain;
400 if (!user_info || !auth_context) {
401 return NT_STATUS_LOGON_FAILURE;
404 is_local_name = is_myname(user_info->domain);
405 is_my_domain = strequal(user_info->domain, lp_workgroup());
407 /* check whether or not we service this domain/workgroup name */
409 switch ( lp_server_role() ) {
410 case ROLE_STANDALONE:
411 case ROLE_DOMAIN_MEMBER:
412 if ( !is_local_name ) {
413 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
414 user_info->domain, (lp_server_role() == ROLE_DOMAIN_MEMBER
415 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
416 return NT_STATUS_NOT_IMPLEMENTED;
418 case ROLE_DOMAIN_PDC:
419 case ROLE_DOMAIN_BDC:
420 if ( !is_local_name && !is_my_domain ) {
421 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
423 return NT_STATUS_NOT_IMPLEMENTED;
425 default: /* name is ok */
429 return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
432 /* module initialisation */
433 static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
435 if (!make_auth_methods(auth_context, auth_method)) {
436 return NT_STATUS_NO_MEMORY;
439 (*auth_method)->auth = check_samstrict_security;
440 (*auth_method)->name = "sam";
444 NTSTATUS auth_sam_init(void)
446 smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
447 smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);