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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 extern struct timeval smb_last_time;
29 #define DBGC_CLASS DBGC_AUTH
31 /****************************************************************************
32 Do a specific test for an smb password being correct, given a smb_password and
33 the lanman and NT responses.
34 ****************************************************************************/
36 static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
39 const auth_usersupplied_info *user_info,
40 DATA_BLOB *user_sess_key,
41 DATA_BLOB *lm_sess_key)
44 const uint8 *lm_pw, *nt_pw;
45 const char *username = pdb_get_username(sampass);
47 acct_ctrl = pdb_get_acct_ctrl(sampass);
48 if (acct_ctrl & ACB_PWNOTREQ) {
49 if (lp_null_passwords()) {
50 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
53 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
54 return NT_STATUS_LOGON_FAILURE;
58 lm_pw = pdb_get_lanman_passwd(sampass);
59 nt_pw = pdb_get_nt_passwd(sampass);
61 return ntlm_password_check(mem_ctx, &auth_context->challenge,
62 &user_info->lm_resp, &user_info->nt_resp,
63 &user_info->lm_interactive_pwd, &user_info->nt_interactive_pwd,
65 user_info->smb_name.str,
66 user_info->client_domain.str,
67 lm_pw, nt_pw, user_sess_key, lm_sess_key);
70 /****************************************************************************
71 Check if a user is allowed to logon at this time. Note this is the
72 servers local time, as logon hours are just specified as a weekly
74 ****************************************************************************/
76 static BOOL logon_hours_ok(SAM_ACCOUNT *sampass)
78 /* In logon hours first bit is Sunday from 12AM to 1AM */
82 uint8 bitmask, bitpos;
84 hours = pdb_get_hours(sampass);
86 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
90 lasttime = (time_t)smb_last_time.tv_sec;
91 utctime = gmtime(&lasttime);
93 /* find the corresponding byte and bit */
94 bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
95 bitmask = 1 << (bitpos % 8);
97 if (! (hours[bitpos/8] & bitmask)) {
98 DEBUG(1,("logon_hours_ok: Account for user %s not allowed to logon at this time (%s).\n",
99 pdb_get_username(sampass),
100 asctime(localtime(&lasttime)) ));
104 DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
105 pdb_get_username(sampass), asctime(utctime) ));
110 /****************************************************************************
111 Do a specific test for a SAM_ACCOUNT being vaild for this connection
112 (ie not disabled, expired and the like).
113 ****************************************************************************/
115 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
116 SAM_ACCOUNT *sampass,
117 const auth_usersupplied_info *user_info)
119 uint16 acct_ctrl = pdb_get_acct_ctrl(sampass);
120 char *workstation_list;
123 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
125 /* Quit if the account was disabled. */
126 if (acct_ctrl & ACB_DISABLED) {
127 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
128 return NT_STATUS_ACCOUNT_DISABLED;
131 /* Quit if the account was locked out. */
132 if (acct_ctrl & ACB_AUTOLOCK) {
133 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
134 return NT_STATUS_ACCOUNT_LOCKED_OUT;
137 /* Quit if the account is not allowed to logon at this time. */
138 if (! logon_hours_ok(sampass)) {
139 return NT_STATUS_INVALID_LOGON_HOURS;
142 /* Test account expire time */
144 kickoff_time = pdb_get_kickoff_time(sampass);
145 if (kickoff_time != 0 && time(NULL) > kickoff_time) {
146 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
147 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
148 return NT_STATUS_ACCOUNT_EXPIRED;
151 if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP)) {
152 time_t must_change_time = pdb_get_pass_must_change_time(sampass);
153 time_t last_set_time = pdb_get_pass_last_set_time(sampass);
155 /* check for immediate expiry "must change at next logon" */
156 if (must_change_time == 0 && last_set_time != 0) {
157 DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
158 return NT_STATUS_PASSWORD_MUST_CHANGE;
161 /* check for expired password */
162 if (must_change_time < time(NULL) && must_change_time != 0) {
163 DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
164 DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
165 return NT_STATUS_PASSWORD_EXPIRED;
169 /* Test workstation. Workstation list is comma separated. */
171 workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
172 if (!workstation_list)
173 return NT_STATUS_NO_MEMORY;
175 if (*workstation_list) {
176 BOOL invalid_ws = True;
178 const char *s = workstation_list;
180 const char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name.str);
181 if (machine_name == NULL)
182 return NT_STATUS_NO_MEMORY;
185 while (next_token(&s, tok, ",", sizeof(tok))) {
186 DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
187 tok, user_info->wksta_name.str, user_info->wksta_name.len));
188 if(strequal(tok, user_info->wksta_name.str)) {
193 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
194 machine_name, tok + 1));
195 if (user_in_group_list(machine_name, tok + 1, NULL, 0)) {
203 return NT_STATUS_INVALID_WORKSTATION;
206 if (acct_ctrl & ACB_DOMTRUST) {
207 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
208 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
211 if (acct_ctrl & ACB_SVRTRUST) {
212 if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
213 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
214 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
218 if (acct_ctrl & ACB_WSTRUST) {
219 if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
220 DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
221 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
227 /****************************************************************************
228 check if a username/password is OK assuming the password is a 24 byte
229 SMB hash supplied in the user_info structure
230 return an NT_STATUS constant.
231 ****************************************************************************/
233 static NTSTATUS check_sam_security(const struct auth_context *auth_context,
234 void *my_private_data,
236 const auth_usersupplied_info *user_info,
237 auth_serversupplied_info **server_info)
239 SAM_ACCOUNT *sampass=NULL;
242 NTSTATUS update_login_attempts_status;
243 DATA_BLOB user_sess_key = data_blob(NULL, 0);
244 DATA_BLOB lm_sess_key = data_blob(NULL, 0);
245 BOOL updated_autolock = False, updated_badpw = False;
247 if (!user_info || !auth_context) {
248 return NT_STATUS_UNSUCCESSFUL;
251 /* Can't use the talloc version here, because the returned struct gets
252 kept on the server_info */
253 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
257 /* get the account information */
260 ret = pdb_getsampwnam(sampass, user_info->internal_username.str);
264 DEBUG(3,("check_sam_security: Couldn't find user '%s' in passdb.\n", user_info->internal_username.str));
265 pdb_free_sam(&sampass);
266 return NT_STATUS_NO_SUCH_USER;
269 /* see if autolock flag needs to be updated */
270 if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
271 pdb_update_autolock_flag(sampass, &updated_autolock);
272 /* Quit if the account was locked out. */
273 if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
274 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
275 return NT_STATUS_ACCOUNT_LOCKED_OUT;
278 nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
279 user_info, &user_sess_key, &lm_sess_key);
281 /* Notify passdb backend of login success/failure. If not NT_STATUS_OK the backend doesn't like the login */
282 update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
283 if (!NT_STATUS_IS_OK(update_login_attempts_status))
284 nt_status = update_login_attempts_status;
286 if (!NT_STATUS_IS_OK(nt_status)) {
287 if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) &&
288 pdb_get_acct_ctrl(sampass) &ACB_NORMAL) {
289 pdb_increment_bad_password_count(sampass);
290 updated_badpw = True;
292 pdb_update_bad_password_count(sampass,
295 if (updated_autolock || updated_badpw){
297 if(!pdb_update_sam_account(sampass))
298 DEBUG(1, ("Failed to modify entry.\n"));
301 data_blob_free(&user_sess_key);
302 data_blob_free(&lm_sess_key);
303 pdb_free_sam(&sampass);
307 if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
308 (pdb_get_bad_password_count(sampass) > 0)){
309 pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
310 pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
311 updated_badpw = True;
314 if (updated_autolock || updated_badpw){
316 if(!pdb_update_sam_account(sampass))
317 DEBUG(1, ("Failed to modify entry.\n"));
321 nt_status = sam_account_ok(mem_ctx, sampass, user_info);
323 if (!NT_STATUS_IS_OK(nt_status)) {
324 pdb_free_sam(&sampass);
325 data_blob_free(&user_sess_key);
326 data_blob_free(&lm_sess_key);
330 if (!NT_STATUS_IS_OK(nt_status = make_server_info_sam(server_info, sampass))) {
331 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
332 data_blob_free(&user_sess_key);
333 data_blob_free(&lm_sess_key);
337 (*server_info)->user_session_key = user_sess_key;
338 (*server_info)->lm_session_key = lm_sess_key;
343 /* module initialisation */
344 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
346 if (!make_auth_methods(auth_context, auth_method)) {
347 return NT_STATUS_NO_MEMORY;
350 (*auth_method)->auth = check_sam_security;
351 (*auth_method)->name = "sam_ignoredomain";
356 /****************************************************************************
357 Check SAM security (above) but with a few extra checks.
358 ****************************************************************************/
360 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
361 void *my_private_data,
363 const auth_usersupplied_info *user_info,
364 auth_serversupplied_info **server_info)
366 BOOL is_local_name, is_my_domain;
368 if (!user_info || !auth_context) {
369 return NT_STATUS_LOGON_FAILURE;
372 is_local_name = is_myname(user_info->domain.str);
373 is_my_domain = strequal(user_info->domain.str, lp_workgroup());
375 /* check whether or not we service this domain/workgroup name */
377 switch ( lp_server_role() ) {
378 case ROLE_STANDALONE:
379 case ROLE_DOMAIN_MEMBER:
380 if ( !is_local_name ) {
381 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
382 user_info->domain.str, (lp_server_role() == ROLE_DOMAIN_MEMBER
383 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
384 return NT_STATUS_NOT_IMPLEMENTED;
386 case ROLE_DOMAIN_PDC:
387 case ROLE_DOMAIN_BDC:
388 if ( !is_local_name && !is_my_domain ) {
389 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
390 user_info->domain.str));
391 return NT_STATUS_NOT_IMPLEMENTED;
393 default: /* name is ok */
397 return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
400 /* module initialisation */
401 static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
403 if (!make_auth_methods(auth_context, auth_method)) {
404 return NT_STATUS_NO_MEMORY;
407 (*auth_method)->auth = check_samstrict_security;
408 (*auth_method)->name = "sam";
412 NTSTATUS auth_sam_init(void)
414 smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
415 smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);