r20116: Start merging in the work done to create the new idmap subsystem.
[tprouty/samba.git] / source / auth / auth_sam.c
1 /* 
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
8    
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.
13    
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.
18    
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.
22 */
23
24 #include "includes.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_AUTH
28
29 /****************************************************************************
30  Do a specific test for an smb password being correct, given a smb_password and
31  the lanman and NT responses.
32 ****************************************************************************/
33
34 static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
35                                 TALLOC_CTX *mem_ctx,
36                                 struct samu *sampass, 
37                                 const auth_usersupplied_info *user_info, 
38                                 DATA_BLOB *user_sess_key, 
39                                 DATA_BLOB *lm_sess_key)
40 {
41         uint32 acct_ctrl;
42         const uint8 *lm_pw, *nt_pw;
43         const char *username = pdb_get_username(sampass);
44
45         acct_ctrl = pdb_get_acct_ctrl(sampass);
46         if (acct_ctrl & ACB_PWNOTREQ) {
47                 if (lp_null_passwords()) {
48                         DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
49                         return NT_STATUS_OK;
50                 } else {
51                         DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
52                         return NT_STATUS_LOGON_FAILURE;
53                 }               
54         }
55
56         lm_pw = pdb_get_lanman_passwd(sampass);
57         nt_pw = pdb_get_nt_passwd(sampass);
58
59         return ntlm_password_check(mem_ctx, &auth_context->challenge, 
60                                    &user_info->lm_resp, &user_info->nt_resp, 
61                                    &user_info->lm_interactive_pwd, &user_info->nt_interactive_pwd,
62                                    username, 
63                                    user_info->smb_name,
64                                    user_info->client_domain,
65                                    lm_pw, nt_pw, user_sess_key, lm_sess_key);
66 }
67
68 /****************************************************************************
69  Check if a user is allowed to logon at this time. Note this is the
70  servers local time, as logon hours are just specified as a weekly
71  bitmask.
72 ****************************************************************************/
73                                                                                                               
74 static BOOL logon_hours_ok(struct samu *sampass)
75 {
76         /* In logon hours first bit is Sunday from 12AM to 1AM */
77         const uint8 *hours;
78         struct tm *utctime;
79         time_t lasttime;
80         const char *asct;
81         uint8 bitmask, bitpos;
82
83         hours = pdb_get_hours(sampass);
84         if (!hours) {
85                 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
86                 return True;
87         }
88
89         lasttime = time(NULL);
90         utctime = gmtime(&lasttime);
91         if (!utctime) {
92                 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
93                         pdb_get_username(sampass) ));
94                 return False;
95         }
96
97         /* find the corresponding byte and bit */
98         bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
99         bitmask = 1 << (bitpos % 8);
100
101         if (! (hours[bitpos/8] & bitmask)) {
102                 struct tm *t = localtime(&lasttime);
103                 if (!t) {
104                         asct = "INVALID TIME";
105                 } else {
106                         asct = asctime(t);
107                         if (!asct) {
108                                 asct = "INVALID TIME";
109                         }
110                 }
111                 
112                 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
113                           "logon at this time (%s).\n",
114                           pdb_get_username(sampass), asct ));
115                 return False;
116         }
117
118         asct = asctime(utctime);
119         DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
120                 pdb_get_username(sampass), asct ? asct : "UNKNOWN TIME" ));
121
122         return True;
123 }
124
125 /****************************************************************************
126  Do a specific test for a struct samu being vaild for this connection 
127  (ie not disabled, expired and the like).
128 ****************************************************************************/
129
130 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
131                                struct samu *sampass, 
132                                const auth_usersupplied_info *user_info)
133 {
134         uint32  acct_ctrl = pdb_get_acct_ctrl(sampass);
135         char *workstation_list;
136         time_t kickoff_time;
137         
138         DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
139
140         /* Quit if the account was disabled. */
141         if (acct_ctrl & ACB_DISABLED) {
142                 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
143                 return NT_STATUS_ACCOUNT_DISABLED;
144         }
145
146         /* Quit if the account was locked out. */
147         if (acct_ctrl & ACB_AUTOLOCK) {
148                 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
149                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
150         }
151
152         /* Quit if the account is not allowed to logon at this time. */
153         if (! logon_hours_ok(sampass)) {
154                 return NT_STATUS_INVALID_LOGON_HOURS;
155         }
156
157         /* Test account expire time */
158         
159         kickoff_time = pdb_get_kickoff_time(sampass);
160         if (kickoff_time != 0 && time(NULL) > kickoff_time) {
161                 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
162                 DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
163                 return NT_STATUS_ACCOUNT_EXPIRED;
164         }
165
166         if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP)) {
167                 time_t must_change_time = pdb_get_pass_must_change_time(sampass);
168                 time_t last_set_time = pdb_get_pass_last_set_time(sampass);
169
170                 /* check for immediate expiry "must change at next logon" */
171                 if (last_set_time == 0) {
172                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
173                         return NT_STATUS_PASSWORD_MUST_CHANGE;
174                 }
175
176                 /* check for expired password */
177                 if (must_change_time < time(NULL) && must_change_time != 0) {
178                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
179                         DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
180                         return NT_STATUS_PASSWORD_EXPIRED;
181                 }
182         }
183
184         /* Test workstation. Workstation list is comma separated. */
185
186         workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
187         if (!workstation_list)
188                 return NT_STATUS_NO_MEMORY;
189
190         if (*workstation_list) {
191                 BOOL invalid_ws = True;
192                 fstring tok;
193                 const char *s = workstation_list;
194
195                 const char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name);
196                 if (machine_name == NULL)
197                         return NT_STATUS_NO_MEMORY;
198                         
199                         
200                 while (next_token(&s, tok, ",", sizeof(tok))) {
201                         DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
202                                   tok, user_info->wksta_name));
203                         if(strequal(tok, user_info->wksta_name)) {
204                                 invalid_ws = False;
205                                 break;
206                         }
207                         if (tok[0] == '+') {
208                                 DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n", 
209                                         machine_name, tok + 1));
210                                 if (user_in_group(machine_name, tok + 1)) {
211                                         invalid_ws = False;
212                                         break;
213                                 }
214                         }
215                 }
216                 
217                 if (invalid_ws) 
218                         return NT_STATUS_INVALID_WORKSTATION;
219         }
220
221         if (acct_ctrl & ACB_DOMTRUST) {
222                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
223                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
224         }
225         
226         if (acct_ctrl & ACB_SVRTRUST) {
227                 if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
228                         DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
229                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
230                 }
231         }
232
233         if (acct_ctrl & ACB_WSTRUST) {
234                 if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
235                         DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
236                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
237                 }
238         }
239         return NT_STATUS_OK;
240 }
241
242 /****************************************************************************
243 check if a username/password is OK assuming the password is a 24 byte
244 SMB hash supplied in the user_info structure
245 return an NT_STATUS constant.
246 ****************************************************************************/
247
248 static NTSTATUS check_sam_security(const struct auth_context *auth_context,
249                                    void *my_private_data, 
250                                    TALLOC_CTX *mem_ctx,
251                                    const auth_usersupplied_info *user_info, 
252                                    auth_serversupplied_info **server_info)
253 {
254         struct samu *sampass=NULL;
255         BOOL ret;
256         NTSTATUS nt_status;
257         NTSTATUS update_login_attempts_status;
258         DATA_BLOB user_sess_key = data_blob(NULL, 0);
259         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
260         BOOL updated_autolock = False, updated_badpw = False;
261
262         if (!user_info || !auth_context) {
263                 return NT_STATUS_UNSUCCESSFUL;
264         }
265
266         /* Can't use the talloc version here, because the returned struct gets
267            kept on the server_info */
268
269         if ( !(sampass = samu_new( NULL )) ) {
270                 return NT_STATUS_NO_MEMORY;
271         }
272
273         /* get the account information */
274
275         become_root();
276         ret = pdb_getsampwnam(sampass, user_info->internal_username);
277         unbecome_root();
278
279         if (ret == False) {
280                 DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
281                          "passdb.\n", user_info->internal_username));
282                 TALLOC_FREE(sampass);
283                 return NT_STATUS_NO_SUCH_USER;
284         }
285
286         /* see if autolock flag needs to be updated */
287         if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
288                 pdb_update_autolock_flag(sampass, &updated_autolock);
289         /* Quit if the account was locked out. */
290         if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
291                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
292                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
293         }
294
295         nt_status = sam_password_ok(auth_context, mem_ctx, sampass, 
296                                     user_info, &user_sess_key, &lm_sess_key);
297
298         /* Notify passdb backend of login success/failure. If not NT_STATUS_OK the backend doesn't like the login */
299         update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
300         if (!NT_STATUS_IS_OK(update_login_attempts_status))
301                 nt_status = update_login_attempts_status;
302
303         if (!NT_STATUS_IS_OK(nt_status)) {
304                 if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) && 
305                     pdb_get_acct_ctrl(sampass) &ACB_NORMAL) {  
306                         pdb_increment_bad_password_count(sampass);
307                         updated_badpw = True;
308                 } else {
309                         pdb_update_bad_password_count(sampass, 
310                                                       &updated_badpw);
311                 }
312                 if (updated_autolock || updated_badpw){
313                         become_root();
314                         if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
315                                 DEBUG(1, ("Failed to modify entry.\n"));
316                         unbecome_root();
317                 }
318                 data_blob_free(&user_sess_key);
319                 data_blob_free(&lm_sess_key);
320                 TALLOC_FREE(sampass);
321                 return nt_status;
322         }
323
324         if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) && 
325             (pdb_get_bad_password_count(sampass) > 0)){
326                 pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
327                 pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
328                 updated_badpw = True;
329         }
330
331         if (updated_autolock || updated_badpw){
332                 become_root();
333                 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
334                         DEBUG(1, ("Failed to modify entry.\n"));
335                 unbecome_root();
336         }
337
338         nt_status = sam_account_ok(mem_ctx, sampass, user_info);
339
340         if (!NT_STATUS_IS_OK(nt_status)) {
341                 TALLOC_FREE(sampass);
342                 data_blob_free(&user_sess_key);
343                 data_blob_free(&lm_sess_key);
344                 return nt_status;
345         }
346
347         become_root();
348         nt_status = make_server_info_sam(server_info, sampass);
349         unbecome_root();
350
351         if (!NT_STATUS_IS_OK(nt_status)) {
352                 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
353                 TALLOC_FREE(sampass);
354                 data_blob_free(&user_sess_key);
355                 data_blob_free(&lm_sess_key);
356                 return nt_status;
357         }
358
359         (*server_info)->user_session_key =
360                 data_blob_talloc(*server_info, user_sess_key.data,
361                                  user_sess_key.length);
362         data_blob_free(&user_sess_key);
363
364         (*server_info)->lm_session_key =
365                 data_blob_talloc(*server_info, lm_sess_key.data,
366                                  lm_sess_key.length);
367         data_blob_free(&lm_sess_key);
368
369         (*server_info)->was_mapped |= user_info->was_mapped;
370
371         return nt_status;
372 }
373
374 /* module initialisation */
375 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method) 
376 {
377         if (!make_auth_methods(auth_context, auth_method)) {
378                 return NT_STATUS_NO_MEMORY;
379         }
380
381         (*auth_method)->auth = check_sam_security;      
382         (*auth_method)->name = "sam_ignoredomain";
383         return NT_STATUS_OK;
384 }
385
386
387 /****************************************************************************
388 Check SAM security (above) but with a few extra checks.
389 ****************************************************************************/
390
391 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
392                                          void *my_private_data, 
393                                          TALLOC_CTX *mem_ctx,
394                                          const auth_usersupplied_info *user_info, 
395                                          auth_serversupplied_info **server_info)
396 {
397         BOOL is_local_name, is_my_domain;
398
399         if (!user_info || !auth_context) {
400                 return NT_STATUS_LOGON_FAILURE;
401         }
402
403         is_local_name = is_myname(user_info->domain);
404         is_my_domain  = strequal(user_info->domain, lp_workgroup());
405
406         /* check whether or not we service this domain/workgroup name */
407         
408         switch ( lp_server_role() ) {
409                 case ROLE_STANDALONE:
410                 case ROLE_DOMAIN_MEMBER:
411                         if ( !is_local_name ) {
412                                 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
413                                         user_info->domain, (lp_server_role() == ROLE_DOMAIN_MEMBER 
414                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
415                                 return NT_STATUS_NOT_IMPLEMENTED;
416                         }
417                 case ROLE_DOMAIN_PDC:
418                 case ROLE_DOMAIN_BDC:
419                         if ( !is_local_name && !is_my_domain ) {
420                                 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
421                                         user_info->domain));
422                                 return NT_STATUS_NOT_IMPLEMENTED;
423                         }
424                 default: /* name is ok */
425                         break;
426         }
427         
428         return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
429 }
430
431 /* module initialisation */
432 static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method) 
433 {
434         if (!make_auth_methods(auth_context, auth_method)) {
435                 return NT_STATUS_NO_MEMORY;
436         }
437
438         (*auth_method)->auth = check_samstrict_security;
439         (*auth_method)->name = "sam";
440         return NT_STATUS_OK;
441 }
442
443 NTSTATUS auth_sam_init(void)
444 {
445         smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
446         smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);
447         return NT_STATUS_OK;
448 }