/* * Unix SMB/CIFS implementation. * account policy storage * Copyright (C) Jean Fran�ois Micouleau 1998-2001. * Copyright (C) Andrew Bartlett 2002 * Copyright (C) Guenther Deschner 2004-2005 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" static struct db_context *db; /* cache all entries for 60 seconds for to save ldap-queries (cache is updated * after this period if admins do not use pdbedit or usermanager but manipulate * ldap directly) - gd */ #define DATABASE_VERSION 3 #define AP_TTL 60 struct ap_table { int field; const char *string; uint32 default_val; const char *description; const char *ldap_attr; }; static const struct ap_table account_policy_names[] = { {AP_MIN_PASSWORD_LEN, "min password length", MINPASSWDLENGTH, "Minimal password length (default: 5)", "sambaMinPwdLength" }, {AP_PASSWORD_HISTORY, "password history", 0, "Length of Password History Entries (default: 0 => off)", "sambaPwdHistoryLength" }, {AP_USER_MUST_LOGON_TO_CHG_PASS, "user must logon to change password", 0, "Force Users to logon for password change (default: 0 => off, 2 => on)", "sambaLogonToChgPwd" }, {AP_MAX_PASSWORD_AGE, "maximum password age", (uint32) -1, "Maximum password age, in seconds (default: -1 => never expire passwords)", "sambaMaxPwdAge" }, {AP_MIN_PASSWORD_AGE,"minimum password age", 0, "Minimal password age, in seconds (default: 0 => allow immediate password change)", "sambaMinPwdAge" }, {AP_LOCK_ACCOUNT_DURATION, "lockout duration", 30, "Lockout duration in minutes (default: 30, -1 => forever)", "sambaLockoutDuration" }, {AP_RESET_COUNT_TIME, "reset count minutes", 30, "Reset time after lockout in minutes (default: 30)", "sambaLockoutObservationWindow" }, {AP_BAD_ATTEMPT_LOCKOUT, "bad lockout attempt", 0, "Lockout users after bad logon attempts (default: 0 => off)", "sambaLockoutThreshold" }, {AP_TIME_TO_LOGOUT, "disconnect time", (uint32) -1, "Disconnect Users outside logon hours (default: -1 => off, 0 => on)", "sambaForceLogoff" }, {AP_REFUSE_MACHINE_PW_CHANGE, "refuse machine password change", 0, "Allow Machine Password changes (default: 0 => off)", "sambaRefuseMachinePwdChange" }, {0, NULL, 0, "", NULL} }; void account_policy_names_list(const char ***names, int *num_names) { const char **nl; int i, count; for (count=0; account_policy_names[count].string; count++) { } nl = SMB_MALLOC_ARRAY(const char *, count); if (!nl) { *num_names = 0; return; } for (i=0; account_policy_names[i].string; i++) { nl[i] = account_policy_names[i].string; } *num_names = count; *names = nl; return; } /**************************************************************************** Get the account policy name as a string from its #define'ed number ****************************************************************************/ const char *decode_account_policy_name(int field) { int i; for (i=0; account_policy_names[i].string; i++) { if (field == account_policy_names[i].field) { return account_policy_names[i].string; } } return NULL; } /**************************************************************************** Get the account policy LDAP attribute as a string from its #define'ed number ****************************************************************************/ const char *get_account_policy_attr(int field) { int i; for (i=0; account_policy_names[i].field; i++) { if (field == account_policy_names[i].field) { return account_policy_names[i].ldap_attr; } } return NULL; } /**************************************************************************** Get the account policy description as a string from its #define'ed number ****************************************************************************/ const char *account_policy_get_desc(int field) { int i; for (i=0; account_policy_names[i].string; i++) { if (field == account_policy_names[i].field) { return account_policy_names[i].description; } } return NULL; } /**************************************************************************** Get the account policy name as a string from its #define'ed number ****************************************************************************/ int account_policy_name_to_fieldnum(const char *name) { int i; for (i=0; account_policy_names[i].string; i++) { if (strcmp(name, account_policy_names[i].string) == 0) { return account_policy_names[i].field; } } return 0; } /***************************************************************************** Get default value for account policy *****************************************************************************/ bool account_policy_get_default(int account_policy, uint32 *val) { int i; for (i=0; account_policy_names[i].field; i++) { if (account_policy_names[i].field == account_policy) { *val = account_policy_names[i].default_val; return True; } } DEBUG(0,("no default for account_policy index %d found. This should never happen\n", account_policy)); return False; } /***************************************************************************** Set default for a field if it is empty *****************************************************************************/ static bool account_policy_set_default_on_empty(int account_policy) { uint32 value; if (!account_policy_get(account_policy, &value) && !account_policy_get_default(account_policy, &value)) { return False; } return account_policy_set(account_policy, value); } /***************************************************************************** Open the account policy tdb. ***`*************************************************************************/ bool init_account_policy(void) { const char *vstring = "INFO/version"; uint32 version; int i; if (db != NULL) { return True; } db = db_open_trans(NULL, state_path("account_policy.tdb"), 0, TDB_DEFAULT, O_RDWR, 0600); if (db == NULL) { /* the account policies files does not exist or open * failed, try to create a new one */ db = db_open_trans(NULL, state_path("account_policy.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600); if (db == NULL) { DEBUG(0,("Failed to open account policy database\n")); return False; } } version = dbwrap_fetch_int32(db, vstring); if (version == DATABASE_VERSION) { return true; } /* handle a Samba upgrade */ if (db->transaction_start(db) != 0) { DEBUG(0, ("transaction_start failed\n")); TALLOC_FREE(db); return false; } version = dbwrap_fetch_int32(db, vstring); if (version == DATABASE_VERSION) { /* * Race condition */ if (db->transaction_cancel(db)) { smb_panic("transaction_cancel failed"); } return true; } if (version != DATABASE_VERSION) { if (dbwrap_store_uint32(db, vstring, DATABASE_VERSION) != 0) { DEBUG(0, ("dbwrap_store_uint32 failed\n")); goto cancel; } for (i=0; account_policy_names[i].field; i++) { if (!account_policy_set_default_on_empty(account_policy_names[i].field)) { DEBUG(0,("failed to set default value in account policy tdb\n")); goto cancel; } } } /* These exist by default on NT4 in [HKLM\SECURITY\Policy\Accounts] */ privilege_create_account( &global_sid_World ); privilege_create_account( &global_sid_Builtin_Account_Operators ); privilege_create_account( &global_sid_Builtin_Server_Operators ); privilege_create_account( &global_sid_Builtin_Print_Operators ); privilege_create_account( &global_sid_Builtin_Backup_Operators ); /* BUILTIN\Administrators get everything -- *always* */ if ( lp_enable_privileges() ) { if ( !grant_all_privileges( &global_sid_Builtin_Administrators ) ) { DEBUG(1,("init_account_policy: Failed to grant privileges " "to BUILTIN\\Administrators!\n")); } } if (db->transaction_commit(db) != 0) { DEBUG(0, ("transaction_commit failed\n")); goto cancel; } return True; cancel: if (db->transaction_cancel(db)) { smb_panic("transaction_cancel failed"); } TALLOC_FREE(db); return false; } /***************************************************************************** Get an account policy (from tdb) *****************************************************************************/ bool account_policy_get(int field, uint32 *value) { const char *name; uint32 regval; if (!init_account_policy()) { return False; } if (value) { *value = 0; } name = decode_account_policy_name(field); if (name == NULL) { DEBUG(1, ("account_policy_get: Field %d is not a valid account policy type! Cannot get, returning 0.\n", field)); return False; } if (!dbwrap_fetch_uint32(db, name, ®val)) { DEBUG(1, ("account_policy_get: tdb_fetch_uint32 failed for field %d (%s), returning 0\n", field, name)); return False; } if (value) { *value = regval; } DEBUG(10,("account_policy_get: name: %s, val: %d\n", name, regval)); return True; } /**************************************************************************** Set an account policy (in tdb) ****************************************************************************/ bool account_policy_set(int field, uint32 value) { const char *name; NTSTATUS status; if (!init_account_policy()) { return False; } name = decode_account_policy_name(field); if (name == NULL) { DEBUG(1, ("Field %d is not a valid account policy type! Cannot set.\n", field)); return False; } status = dbwrap_trans_store_uint32(db, name, value); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("store_uint32 failed for field %d (%s) on value " "%u: %s\n", field, name, value, nt_errstr(status))); return False; } DEBUG(10,("account_policy_set: name: %s, value: %d\n", name, value)); return True; } /**************************************************************************** Set an account policy in the cache ****************************************************************************/ bool cache_account_policy_set(int field, uint32 value) { const char *policy_name = NULL; char *cache_key = NULL; char *cache_value = NULL; bool ret = False; policy_name = decode_account_policy_name(field); if (policy_name == NULL) { DEBUG(0,("cache_account_policy_set: no policy found\n")); return False; } if (asprintf(&cache_key, "ACCT_POL/%s", policy_name) < 0) { DEBUG(0, ("asprintf failed\n")); goto done; } if (asprintf(&cache_value, "%lu\n", (unsigned long)value) < 0) { DEBUG(0, ("asprintf failed\n")); goto done; } DEBUG(10,("cache_account_policy_set: updating account pol cache\n")); ret = gencache_set(cache_key, cache_value, time(NULL)+AP_TTL); done: SAFE_FREE(cache_key); SAFE_FREE(cache_value); return ret; } /***************************************************************************** Get an account policy from the cache *****************************************************************************/ bool cache_account_policy_get(int field, uint32 *value) { const char *policy_name = NULL; char *cache_key = NULL; char *cache_value = NULL; bool ret = False; policy_name = decode_account_policy_name(field); if (policy_name == NULL) { DEBUG(0,("cache_account_policy_set: no policy found\n")); return False; } if (asprintf(&cache_key, "ACCT_POL/%s", policy_name) < 0) { DEBUG(0, ("asprintf failed\n")); goto done; } if (gencache_get(cache_key, &cache_value, NULL)) { uint32 tmp = strtoul(cache_value, NULL, 10); *value = tmp; ret = True; } done: SAFE_FREE(cache_key); SAFE_FREE(cache_value); return ret; } /**************************************************************************** ****************************************************************************/ struct db_context *get_account_pol_db( void ) { if ( db == NULL ) { if ( !init_account_policy() ) { return NULL; } } return db; }