source: trunk-3.0/source/auth/auth_sam.c@ 103

Last change on this file since 103 was 44, checked in by Paul Smedley, 18 years ago

Update source to 3.0.25b
File size: 14.9 KB
Line 
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
34static 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
74static 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
130static 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) && !(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) {
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/****************************************************************************
243check if a username/password is OK assuming the password is a 24 byte
244SMB hash supplied in the user_info structure
245return an NT_STATUS constant.
246****************************************************************************/
247
248static 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 */
375static 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/****************************************************************************
388Check SAM security (above) but with a few extra checks.
389****************************************************************************/
390
391static 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 */
432static 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
443NTSTATUS 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}
Note: See TracBrowser for help on using the repository browser.