source: branches/samba-3.3.x/source/auth/auth_sam.c

Last change on this file was 206, checked in by Herwig Bauernfeind, 16 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
File size: 14.4 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 3 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, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "includes.h"
24
25#undef DBGC_CLASS
26#define DBGC_CLASS DBGC_AUTH
27
28/****************************************************************************
29 Do a specific test for an smb password being correct, given a smb_password and
30 the lanman and NT responses.
31****************************************************************************/
32
33static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
34 TALLOC_CTX *mem_ctx,
35 struct samu *sampass,
36 const auth_usersupplied_info *user_info,
37 DATA_BLOB *user_sess_key,
38 DATA_BLOB *lm_sess_key)
39{
40 uint32 acct_ctrl;
41 const uint8 *lm_pw, *nt_pw;
42 const char *username = pdb_get_username(sampass);
43
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));
48 return NT_STATUS_OK;
49 } else {
50 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
51 return NT_STATUS_LOGON_FAILURE;
52 }
53 }
54
55 lm_pw = pdb_get_lanman_passwd(sampass);
56 nt_pw = pdb_get_nt_passwd(sampass);
57
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,
61 username,
62 user_info->smb_name,
63 user_info->client_domain,
64 lm_pw, nt_pw, user_sess_key, lm_sess_key);
65}
66
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
70 bitmask.
71****************************************************************************/
72
73static bool logon_hours_ok(struct samu *sampass)
74{
75 /* In logon hours first bit is Sunday from 12AM to 1AM */
76 const uint8 *hours;
77 struct tm *utctime;
78 time_t lasttime;
79 const char *asct;
80 uint8 bitmask, bitpos;
81
82 hours = pdb_get_hours(sampass);
83 if (!hours) {
84 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
85 return True;
86 }
87
88 lasttime = time(NULL);
89 utctime = gmtime(&lasttime);
90 if (!utctime) {
91 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
92 pdb_get_username(sampass) ));
93 return False;
94 }
95
96 /* find the corresponding byte and bit */
97 bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
98 bitmask = 1 << (bitpos % 8);
99
100 if (! (hours[bitpos/8] & bitmask)) {
101 struct tm *t = localtime(&lasttime);
102 if (!t) {
103 asct = "INVALID TIME";
104 } else {
105 asct = asctime(t);
106 if (!asct) {
107 asct = "INVALID TIME";
108 }
109 }
110
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 ));
114 return False;
115 }
116
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" ));
120
121 return True;
122}
123
124/****************************************************************************
125 Do a specific test for a struct samu being valid for this connection
126 (ie not disabled, expired and the like).
127****************************************************************************/
128
129static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
130 struct samu *sampass,
131 const auth_usersupplied_info *user_info)
132{
133 uint32 acct_ctrl = pdb_get_acct_ctrl(sampass);
134 char *workstation_list;
135 time_t kickoff_time;
136
137 DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
138
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;
143 }
144
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;
149 }
150
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;
154 }
155
156 /* Test account expire time */
157
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;
163 }
164
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);
168
169 /* check for immediate expiry "must change at next logon"
170 * for a user account. */
171 if (((acct_ctrl & (ACB_WSTRUST|ACB_SVRTRUST)) == 0) && (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 char *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 while (next_token_talloc(mem_ctx, &s, &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)) {
203 invalid_ws = False;
204 break;
205 }
206 if (tok[0] == '+') {
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)) {
210 invalid_ws = False;
211 break;
212 }
213 }
214 TALLOC_FREE(tok);
215 }
216 TALLOC_FREE(tok);
217
218 if (invalid_ws)
219 return NT_STATUS_INVALID_WORKSTATION;
220 }
221
222 if (acct_ctrl & ACB_DOMTRUST) {
223 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
224 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
225 }
226
227 if (acct_ctrl & ACB_SVRTRUST) {
228 if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
229 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
230 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
231 }
232 }
233
234 if (acct_ctrl & ACB_WSTRUST) {
235 if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
236 DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
237 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
238 }
239 }
240 return NT_STATUS_OK;
241}
242
243/****************************************************************************
244check if a username/password is OK assuming the password is a 24 byte
245SMB hash supplied in the user_info structure
246return an NT_STATUS constant.
247****************************************************************************/
248
249static NTSTATUS check_sam_security(const struct auth_context *auth_context,
250 void *my_private_data,
251 TALLOC_CTX *mem_ctx,
252 const auth_usersupplied_info *user_info,
253 auth_serversupplied_info **server_info)
254{
255 struct samu *sampass=NULL;
256 bool ret;
257 NTSTATUS nt_status;
258 NTSTATUS update_login_attempts_status;
259 DATA_BLOB user_sess_key = data_blob_null;
260 DATA_BLOB lm_sess_key = data_blob_null;
261 bool updated_autolock = False, updated_badpw = False;
262
263 if (!user_info || !auth_context) {
264 return NT_STATUS_UNSUCCESSFUL;
265 }
266
267 /* the returned struct gets kept on the server_info, by means
268 of a steal further down */
269
270 if ( !(sampass = samu_new( mem_ctx )) ) {
271 return NT_STATUS_NO_MEMORY;
272 }
273
274 /* get the account information */
275
276 become_root();
277 ret = pdb_getsampwnam(sampass, user_info->internal_username);
278 unbecome_root();
279
280 if (ret == False) {
281 DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
282 "passdb.\n", user_info->internal_username));
283 TALLOC_FREE(sampass);
284 return NT_STATUS_NO_SUCH_USER;
285 }
286
287 /* see if autolock flag needs to be updated */
288 if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
289 pdb_update_autolock_flag(sampass, &updated_autolock);
290 /* Quit if the account was locked out. */
291 if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
292 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
293 return NT_STATUS_ACCOUNT_LOCKED_OUT;
294 }
295
296 nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
297 user_info, &user_sess_key, &lm_sess_key);
298
299 /* Notify passdb backend of login success/failure. If not
300 NT_STATUS_OK the backend doesn't like the login */
301
302 update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
303
304 if (!NT_STATUS_IS_OK(nt_status)) {
305 if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) &&
306 pdb_get_acct_ctrl(sampass) &ACB_NORMAL &&
307 NT_STATUS_IS_OK(update_login_attempts_status))
308 {
309 pdb_increment_bad_password_count(sampass);
310 updated_badpw = True;
311 } else {
312 pdb_update_bad_password_count(sampass,
313 &updated_badpw);
314 }
315 if (updated_autolock || updated_badpw){
316 become_root();
317 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
318 DEBUG(1, ("Failed to modify entry.\n"));
319 unbecome_root();
320 }
321 data_blob_free(&user_sess_key);
322 data_blob_free(&lm_sess_key);
323 TALLOC_FREE(sampass);
324 return nt_status;
325 }
326
327 if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
328 (pdb_get_bad_password_count(sampass) > 0)){
329 pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
330 pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
331 updated_badpw = True;
332 }
333
334 if (updated_autolock || updated_badpw){
335 become_root();
336 if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
337 DEBUG(1, ("Failed to modify entry.\n"));
338 unbecome_root();
339 }
340
341 nt_status = sam_account_ok(mem_ctx, sampass, user_info);
342
343 if (!NT_STATUS_IS_OK(nt_status)) {
344 TALLOC_FREE(sampass);
345 data_blob_free(&user_sess_key);
346 data_blob_free(&lm_sess_key);
347 return nt_status;
348 }
349
350 become_root();
351 nt_status = make_server_info_sam(server_info, sampass);
352 unbecome_root();
353
354 if (!NT_STATUS_IS_OK(nt_status)) {
355 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
356 data_blob_free(&user_sess_key);
357 data_blob_free(&lm_sess_key);
358 return nt_status;
359 }
360
361 (*server_info)->user_session_key =
362 data_blob_talloc(*server_info, user_sess_key.data,
363 user_sess_key.length);
364 data_blob_free(&user_sess_key);
365
366 (*server_info)->lm_session_key =
367 data_blob_talloc(*server_info, lm_sess_key.data,
368 lm_sess_key.length);
369 data_blob_free(&lm_sess_key);
370
371 (*server_info)->nss_token |= user_info->was_mapped;
372
373 return nt_status;
374}
375
376/* module initialisation */
377static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
378{
379 if (!make_auth_methods(auth_context, auth_method)) {
380 return NT_STATUS_NO_MEMORY;
381 }
382
383 (*auth_method)->auth = check_sam_security;
384 (*auth_method)->name = "sam_ignoredomain";
385 return NT_STATUS_OK;
386}
387
388
389/****************************************************************************
390Check SAM security (above) but with a few extra checks.
391****************************************************************************/
392
393static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
394 void *my_private_data,
395 TALLOC_CTX *mem_ctx,
396 const auth_usersupplied_info *user_info,
397 auth_serversupplied_info **server_info)
398{
399 bool is_local_name, is_my_domain;
400
401 if (!user_info || !auth_context) {
402 return NT_STATUS_LOGON_FAILURE;
403 }
404
405 is_local_name = is_myname(user_info->domain);
406 is_my_domain = strequal(user_info->domain, lp_workgroup());
407
408 /* check whether or not we service this domain/workgroup name */
409
410 switch ( lp_server_role() ) {
411 case ROLE_STANDALONE:
412 case ROLE_DOMAIN_MEMBER:
413 if ( !is_local_name ) {
414 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
415 user_info->domain, (lp_server_role() == ROLE_DOMAIN_MEMBER
416 ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
417 return NT_STATUS_NOT_IMPLEMENTED;
418 }
419 case ROLE_DOMAIN_PDC:
420 case ROLE_DOMAIN_BDC:
421 if ( !is_local_name && !is_my_domain ) {
422 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
423 user_info->domain));
424 return NT_STATUS_NOT_IMPLEMENTED;
425 }
426 default: /* name is ok */
427 break;
428 }
429
430 return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
431}
432
433/* module initialisation */
434static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
435{
436 if (!make_auth_methods(auth_context, auth_method)) {
437 return NT_STATUS_NO_MEMORY;
438 }
439
440 (*auth_method)->auth = check_samstrict_security;
441 (*auth_method)->name = "sam";
442 return NT_STATUS_OK;
443}
444
445NTSTATUS auth_sam_init(void)
446{
447 smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
448 smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);
449 return NT_STATUS_OK;
450}
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