source: vendor/3.6.24/source3/passdb/account_pol.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 12.9 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * account policy storage
4 * Copyright (C) Jean François Micouleau 1998-2001.
5 * Copyright (C) Andrew Bartlett 2002
6 * Copyright (C) Guenther Deschner 2004-2005
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 */
21
22#include "includes.h"
23#include "system/filesys.h"
24#include "passdb.h"
25#include "dbwrap.h"
26#include "../libcli/security/security.h"
27#include "lib/privileges.h"
28
29static struct db_context *db;
30
31/* cache all entries for 60 seconds for to save ldap-queries (cache is updated
32 * after this period if admins do not use pdbedit or usermanager but manipulate
33 * ldap directly) - gd */
34
35#define DATABASE_VERSION 3
36#define AP_TTL 60
37
38
39struct ap_table {
40 enum pdb_policy_type type;
41 const char *string;
42 uint32 default_val;
43 const char *description;
44 const char *ldap_attr;
45};
46
47static const struct ap_table account_policy_names[] = {
48 {PDB_POLICY_MIN_PASSWORD_LEN, "min password length", MINPASSWDLENGTH,
49 "Minimal password length (default: 5)",
50 "sambaMinPwdLength" },
51
52 {PDB_POLICY_PASSWORD_HISTORY, "password history", 0,
53 "Length of Password History Entries (default: 0 => off)",
54 "sambaPwdHistoryLength" },
55
56 {PDB_POLICY_USER_MUST_LOGON_TO_CHG_PASS, "user must logon to change password", 0,
57 "Force Users to logon for password change (default: 0 => off, 2 => on)",
58 "sambaLogonToChgPwd" },
59
60 {PDB_POLICY_MAX_PASSWORD_AGE, "maximum password age", (uint32) -1,
61 "Maximum password age, in seconds (default: -1 => never expire passwords)",
62 "sambaMaxPwdAge" },
63
64 {PDB_POLICY_MIN_PASSWORD_AGE,"minimum password age", 0,
65 "Minimal password age, in seconds (default: 0 => allow immediate password change)",
66 "sambaMinPwdAge" },
67
68 {PDB_POLICY_LOCK_ACCOUNT_DURATION, "lockout duration", 30,
69 "Lockout duration in minutes (default: 30, -1 => forever)",
70 "sambaLockoutDuration" },
71
72 {PDB_POLICY_RESET_COUNT_TIME, "reset count minutes", 30,
73 "Reset time after lockout in minutes (default: 30)",
74 "sambaLockoutObservationWindow" },
75
76 {PDB_POLICY_BAD_ATTEMPT_LOCKOUT, "bad lockout attempt", 0,
77 "Lockout users after bad logon attempts (default: 0 => off)",
78 "sambaLockoutThreshold" },
79
80 {PDB_POLICY_TIME_TO_LOGOUT, "disconnect time", (uint32) -1,
81 "Disconnect Users outside logon hours (default: -1 => off, 0 => on)",
82 "sambaForceLogoff" },
83
84 {PDB_POLICY_REFUSE_MACHINE_PW_CHANGE, "refuse machine password change", 0,
85 "Allow Machine Password changes (default: 0 => off)",
86 "sambaRefuseMachinePwdChange" },
87
88 {0, NULL, 0, "", NULL}
89};
90
91void account_policy_names_list(const char ***names, int *num_names)
92{
93 const char **nl;
94 int i, count;
95
96 for (count=0; account_policy_names[count].string; count++) {
97 }
98 nl = SMB_MALLOC_ARRAY(const char *, count);
99 if (!nl) {
100 *num_names = 0;
101 return;
102 }
103 for (i=0; account_policy_names[i].string; i++) {
104 nl[i] = account_policy_names[i].string;
105 }
106 *num_names = count;
107 *names = nl;
108 return;
109}
110
111/****************************************************************************
112Get the account policy name as a string from its #define'ed number
113****************************************************************************/
114
115const char *decode_account_policy_name(enum pdb_policy_type type)
116{
117 int i;
118 for (i=0; account_policy_names[i].string; i++) {
119 if (type == account_policy_names[i].type) {
120 return account_policy_names[i].string;
121 }
122 }
123 return NULL;
124}
125
126/****************************************************************************
127Get the account policy LDAP attribute as a string from its #define'ed number
128****************************************************************************/
129
130const char *get_account_policy_attr(enum pdb_policy_type type)
131{
132 int i;
133 for (i=0; account_policy_names[i].type; i++) {
134 if (type == account_policy_names[i].type) {
135 return account_policy_names[i].ldap_attr;
136 }
137 }
138 return NULL;
139}
140
141/****************************************************************************
142Get the account policy description as a string from its #define'ed number
143****************************************************************************/
144
145const char *account_policy_get_desc(enum pdb_policy_type type)
146{
147 int i;
148 for (i=0; account_policy_names[i].string; i++) {
149 if (type == account_policy_names[i].type) {
150 return account_policy_names[i].description;
151 }
152 }
153 return NULL;
154}
155
156/****************************************************************************
157Get the account policy name as a string from its #define'ed number
158****************************************************************************/
159
160enum pdb_policy_type account_policy_name_to_typenum(const char *name)
161{
162 int i;
163 for (i=0; account_policy_names[i].string; i++) {
164 if (strcmp(name, account_policy_names[i].string) == 0) {
165 return account_policy_names[i].type;
166 }
167 }
168 return 0;
169}
170
171/*****************************************************************************
172Get default value for account policy
173*****************************************************************************/
174
175bool account_policy_get_default(enum pdb_policy_type type, uint32_t *val)
176{
177 int i;
178 for (i=0; account_policy_names[i].type; i++) {
179 if (account_policy_names[i].type == type) {
180 *val = account_policy_names[i].default_val;
181 return True;
182 }
183 }
184 DEBUG(0,("no default for account_policy index %d found. This should never happen\n",
185 type));
186 return False;
187}
188
189/*****************************************************************************
190 Set default for a type if it is empty
191*****************************************************************************/
192
193static bool account_policy_set_default_on_empty(enum pdb_policy_type type)
194{
195
196 uint32 value;
197
198 if (!account_policy_get(type, &value) &&
199 !account_policy_get_default(type, &value)) {
200 return False;
201 }
202
203 return account_policy_set(type, value);
204}
205
206/*****************************************************************************
207 Open the account policy tdb.
208***`*************************************************************************/
209
210bool init_account_policy(void)
211{
212
213 const char *vstring = "INFO/version";
214 uint32 version;
215 int i;
216
217 if (db != NULL) {
218 return True;
219 }
220
221 db = db_open(NULL, state_path("account_policy.tdb"), 0, TDB_DEFAULT,
222 O_RDWR, 0600);
223
224 if (db == NULL) { /* the account policies files does not exist or open
225 * failed, try to create a new one */
226 db = db_open(NULL, state_path("account_policy.tdb"), 0,
227 TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
228 if (db == NULL) {
229 DEBUG(0,("Failed to open account policy database\n"));
230 return False;
231 }
232 }
233
234 version = dbwrap_fetch_int32(db, vstring);
235 if (version == DATABASE_VERSION) {
236 return true;
237 }
238
239 /* handle a Samba upgrade */
240
241 if (db->transaction_start(db) != 0) {
242 DEBUG(0, ("transaction_start failed\n"));
243 TALLOC_FREE(db);
244 return false;
245 }
246
247 version = dbwrap_fetch_int32(db, vstring);
248 if (version == DATABASE_VERSION) {
249 /*
250 * Race condition
251 */
252 if (db->transaction_cancel(db)) {
253 smb_panic("transaction_cancel failed");
254 }
255 return true;
256 }
257
258 if (version != DATABASE_VERSION) {
259 if (dbwrap_store_uint32(db, vstring, DATABASE_VERSION) != 0) {
260 DEBUG(0, ("dbwrap_store_uint32 failed\n"));
261 goto cancel;
262 }
263
264 for (i=0; account_policy_names[i].type; i++) {
265
266 if (!account_policy_set_default_on_empty(account_policy_names[i].type)) {
267 DEBUG(0,("failed to set default value in account policy tdb\n"));
268 goto cancel;
269 }
270 }
271 }
272
273 /* These exist by default on NT4 in [HKLM\SECURITY\Policy\Accounts] */
274
275 privilege_create_account( &global_sid_World );
276 privilege_create_account( &global_sid_Builtin_Account_Operators );
277 privilege_create_account( &global_sid_Builtin_Server_Operators );
278 privilege_create_account( &global_sid_Builtin_Print_Operators );
279 privilege_create_account( &global_sid_Builtin_Backup_Operators );
280
281 /* BUILTIN\Administrators get everything -- *always* */
282
283 if ( lp_enable_privileges() ) {
284 if ( !grant_all_privileges( &global_sid_Builtin_Administrators ) ) {
285 DEBUG(1,("init_account_policy: Failed to grant privileges "
286 "to BUILTIN\\Administrators!\n"));
287 }
288 }
289
290 if (db->transaction_commit(db) != 0) {
291 DEBUG(0, ("transaction_commit failed\n"));
292 TALLOC_FREE(db);
293 return false;
294 }
295
296 return True;
297
298 cancel:
299 if (db->transaction_cancel(db)) {
300 smb_panic("transaction_cancel failed");
301 }
302 TALLOC_FREE(db);
303
304 return false;
305}
306
307/*****************************************************************************
308Get an account policy (from tdb)
309*****************************************************************************/
310
311bool account_policy_get(enum pdb_policy_type type, uint32_t *value)
312{
313 const char *name;
314 uint32 regval;
315
316 if (!init_account_policy()) {
317 return False;
318 }
319
320 if (value) {
321 *value = 0;
322 }
323
324 name = decode_account_policy_name(type);
325 if (name == NULL) {
326 DEBUG(1, ("account_policy_get: Field %d is not a valid account policy type! Cannot get, returning 0.\n", type));
327 return False;
328 }
329
330 if (!dbwrap_fetch_uint32(db, name, &regval)) {
331 DEBUG(1, ("account_policy_get: tdb_fetch_uint32 failed for type %d (%s), returning 0\n", type, name));
332 return False;
333 }
334
335 if (value) {
336 *value = regval;
337 }
338
339 DEBUG(10,("account_policy_get: name: %s, val: %d\n", name, regval));
340 return True;
341}
342
343
344/****************************************************************************
345Set an account policy (in tdb)
346****************************************************************************/
347
348bool account_policy_set(enum pdb_policy_type type, uint32_t value)
349{
350 const char *name;
351 NTSTATUS status;
352
353 if (!init_account_policy()) {
354 return False;
355 }
356
357 name = decode_account_policy_name(type);
358 if (name == NULL) {
359 DEBUG(1, ("Field %d is not a valid account policy type! Cannot set.\n", type));
360 return False;
361 }
362
363 status = dbwrap_trans_store_uint32(db, name, value);
364 if (!NT_STATUS_IS_OK(status)) {
365 DEBUG(1, ("store_uint32 failed for type %d (%s) on value "
366 "%u: %s\n", type, name, value, nt_errstr(status)));
367 return False;
368 }
369
370 DEBUG(10,("account_policy_set: name: %s, value: %d\n", name, value));
371
372 return True;
373}
374
375/****************************************************************************
376Set an account policy in the cache
377****************************************************************************/
378
379bool cache_account_policy_set(enum pdb_policy_type type, uint32_t value)
380{
381 const char *policy_name = NULL;
382 char *cache_key = NULL;
383 char *cache_value = NULL;
384 bool ret = False;
385
386 policy_name = decode_account_policy_name(type);
387 if (policy_name == NULL) {
388 DEBUG(0,("cache_account_policy_set: no policy found\n"));
389 return False;
390 }
391
392 if (asprintf(&cache_key, "ACCT_POL/%s", policy_name) < 0) {
393 DEBUG(0, ("asprintf failed\n"));
394 goto done;
395 }
396
397 if (asprintf(&cache_value, "%lu\n", (unsigned long)value) < 0) {
398 DEBUG(0, ("asprintf failed\n"));
399 goto done;
400 }
401
402 DEBUG(10,("cache_account_policy_set: updating account pol cache\n"));
403
404 ret = gencache_set(cache_key, cache_value, time(NULL)+AP_TTL);
405
406 done:
407 SAFE_FREE(cache_key);
408 SAFE_FREE(cache_value);
409 return ret;
410}
411
412/*****************************************************************************
413Get an account policy from the cache
414*****************************************************************************/
415
416bool cache_account_policy_get(enum pdb_policy_type type, uint32_t *value)
417{
418 const char *policy_name = NULL;
419 char *cache_key = NULL;
420 char *cache_value = NULL;
421 bool ret = False;
422
423 policy_name = decode_account_policy_name(type);
424 if (policy_name == NULL) {
425 DEBUG(0,("cache_account_policy_set: no policy found\n"));
426 return False;
427 }
428
429 if (asprintf(&cache_key, "ACCT_POL/%s", policy_name) < 0) {
430 DEBUG(0, ("asprintf failed\n"));
431 goto done;
432 }
433
434 if (gencache_get(cache_key, &cache_value, NULL)) {
435 uint32 tmp = strtoul(cache_value, NULL, 10);
436 *value = tmp;
437 ret = True;
438 }
439
440 done:
441 SAFE_FREE(cache_key);
442 SAFE_FREE(cache_value);
443 return ret;
444}
445
446/****************************************************************************
447****************************************************************************/
448
449struct db_context *get_account_pol_db( void )
450{
451
452 if ( db == NULL ) {
453 if ( !init_account_policy() ) {
454 return NULL;
455 }
456 }
457
458 return db;
459}
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