summaryrefslogtreecommitdiffstats
path: root/source3/passdb/account_pol.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
commit8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch)
tree4099e8021376c7d8c05bdf8503093d80e9c7bad0 /source3/passdb/account_pol.c
parentInitial commit. (diff)
downloadsamba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz
samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'source3/passdb/account_pol.c')
-rw-r--r--source3/passdb/account_pol.c494
1 files changed, 494 insertions, 0 deletions
diff --git a/source3/passdb/account_pol.c b/source3/passdb/account_pol.c
new file mode 100644
index 0000000..34c0d72
--- /dev/null
+++ b/source3/passdb/account_pol.c
@@ -0,0 +1,494 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * account policy storage
+ * Copyright (C) Jean François 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"
+#include "system/filesys.h"
+#include "passdb.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "../libcli/security/security.h"
+#include "lib/privileges.h"
+#include "lib/gencache.h"
+#include "lib/util/smb_strtox.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 {
+ enum pdb_policy_type type;
+ const char *string;
+ uint32_t default_val;
+ const char *description;
+ const char *ldap_attr;
+};
+
+static const struct ap_table account_policy_names[] = {
+ {PDB_POLICY_MIN_PASSWORD_LEN, "min password length", MINPASSWDLENGTH,
+ "Minimal password length (default: 5)",
+ "sambaMinPwdLength" },
+
+ {PDB_POLICY_PASSWORD_HISTORY, "password history", 0,
+ "Length of Password History Entries (default: 0 => off)",
+ "sambaPwdHistoryLength" },
+
+ {PDB_POLICY_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" },
+
+ {PDB_POLICY_MAX_PASSWORD_AGE, "maximum password age", (uint32_t) -1,
+ "Maximum password age, in seconds (default: -1 => never expire passwords)",
+ "sambaMaxPwdAge" },
+
+ {PDB_POLICY_MIN_PASSWORD_AGE,"minimum password age", 0,
+ "Minimal password age, in seconds (default: 0 => allow immediate password change)",
+ "sambaMinPwdAge" },
+
+ {PDB_POLICY_LOCK_ACCOUNT_DURATION, "lockout duration", 30,
+ "Lockout duration in minutes (default: 30, -1 => forever)",
+ "sambaLockoutDuration" },
+
+ {PDB_POLICY_RESET_COUNT_TIME, "reset count minutes", 30,
+ "Reset time after lockout in minutes (default: 30)",
+ "sambaLockoutObservationWindow" },
+
+ {PDB_POLICY_BAD_ATTEMPT_LOCKOUT, "bad lockout attempt", 0,
+ "Lockout users after bad logon attempts (default: 0 => off)",
+ "sambaLockoutThreshold" },
+
+ {PDB_POLICY_TIME_TO_LOGOUT, "disconnect time", (uint32_t) -1,
+ "Disconnect Users outside logon hours (default: -1 => off, 0 => on)",
+ "sambaForceLogoff" },
+
+ {PDB_POLICY_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(TALLOC_CTX *mem_ctx, const char ***names, int *num_names)
+{
+ const char **nl;
+ int i, count = ARRAY_SIZE(account_policy_names);
+
+ nl = talloc_array(mem_ctx, const char *, count);
+ if (!nl) {
+ *num_names = 0;
+ return;
+ }
+ for (i=0; i<count; i++) {
+ nl[i] = account_policy_names[i].string;
+ }
+ /* Do not return the last null entry */
+ *num_names = count-1;
+ *names = nl;
+ return;
+}
+
+/****************************************************************************
+Get the account policy name as a string from its #define'ed number
+****************************************************************************/
+
+const char *decode_account_policy_name(enum pdb_policy_type type)
+{
+ int i;
+ for (i=0; account_policy_names[i].string; i++) {
+ if (type == account_policy_names[i].type) {
+ 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(enum pdb_policy_type type)
+{
+ int i;
+ for (i=0; account_policy_names[i].type; i++) {
+ if (type == account_policy_names[i].type) {
+ 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(enum pdb_policy_type type)
+{
+ int i;
+ for (i=0; account_policy_names[i].string; i++) {
+ if (type == account_policy_names[i].type) {
+ return account_policy_names[i].description;
+ }
+ }
+ return NULL;
+}
+
+/****************************************************************************
+Get the account policy name as a string from its #define'ed number
+****************************************************************************/
+
+enum pdb_policy_type account_policy_name_to_typenum(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].type;
+ }
+ }
+ return 0;
+}
+
+/*****************************************************************************
+Get default value for account policy
+*****************************************************************************/
+
+bool account_policy_get_default(enum pdb_policy_type type, uint32_t *val)
+{
+ int i;
+ for (i=0; account_policy_names[i].type; i++) {
+ if (account_policy_names[i].type == type) {
+ *val = account_policy_names[i].default_val;
+ return True;
+ }
+ }
+ DEBUG(0,("no default for account_policy index %d found. This should never happen\n",
+ type));
+ return False;
+}
+
+/*****************************************************************************
+ Set default for a type if it is empty
+*****************************************************************************/
+
+static bool account_policy_set_default_on_empty(enum pdb_policy_type type)
+{
+
+ uint32_t value;
+
+ if (!account_policy_get(type, &value) &&
+ !account_policy_get_default(type, &value)) {
+ return False;
+ }
+
+ return account_policy_set(type, value);
+}
+
+/*****************************************************************************
+ Open the account policy tdb.
+***`*************************************************************************/
+
+bool init_account_policy(void)
+{
+
+ const char *vstring = "INFO/version";
+ uint32_t version = 0;
+ int i;
+ NTSTATUS status;
+ char *db_path;
+
+ if (db != NULL) {
+ return True;
+ }
+
+ db_path = state_path(talloc_tos(), "account_policy.tdb");
+ if (db_path == NULL) {
+ return false;
+ }
+
+ db = db_open(NULL, db_path, 0, TDB_DEFAULT,
+ O_RDWR, 0600, DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+
+ if (db == NULL) { /* the account policies files does not exist or open
+ * failed, try to create a new one */
+ db = db_open(NULL, db_path, 0,
+ TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
+ DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+ if (db == NULL) {
+ DEBUG(0,("Failed to open account policy database\n"));
+ TALLOC_FREE(db_path);
+ return False;
+ }
+ }
+ TALLOC_FREE(db_path);
+
+ status = dbwrap_fetch_uint32_bystring(db, vstring, &version);
+ if (!NT_STATUS_IS_OK(status)) {
+ version = 0;
+ }
+
+ if (version == DATABASE_VERSION) {
+ return true;
+ }
+
+ /* handle a Samba upgrade */
+
+ if (dbwrap_transaction_start(db) != 0) {
+ DEBUG(0, ("transaction_start failed\n"));
+ TALLOC_FREE(db);
+ return false;
+ }
+
+ status = dbwrap_fetch_uint32_bystring(db, vstring, &version);
+ if (!NT_STATUS_IS_OK(status)) {
+ version = 0;
+ }
+
+ if (version == DATABASE_VERSION) {
+ /*
+ * Race condition
+ */
+ if (dbwrap_transaction_cancel(db)) {
+ smb_panic("transaction_cancel failed");
+ }
+ return true;
+ }
+
+ if (version != DATABASE_VERSION) {
+ status = dbwrap_store_uint32_bystring(db, vstring,
+ DATABASE_VERSION);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("dbwrap_store_uint32_t failed: %s\n",
+ nt_errstr(status)));
+ goto cancel;
+ }
+
+ for (i=0; account_policy_names[i].type; i++) {
+
+ if (!account_policy_set_default_on_empty(account_policy_names[i].type)) {
+ 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 (dbwrap_transaction_commit(db) != 0) {
+ DEBUG(0, ("transaction_commit failed\n"));
+ TALLOC_FREE(db);
+ return false;
+ }
+
+ return True;
+
+ cancel:
+ if (dbwrap_transaction_cancel(db)) {
+ smb_panic("transaction_cancel failed");
+ }
+ TALLOC_FREE(db);
+
+ return false;
+}
+
+/*****************************************************************************
+Get an account policy (from tdb)
+*****************************************************************************/
+
+bool account_policy_get(enum pdb_policy_type type, uint32_t *value)
+{
+ const char *name;
+ uint32_t regval;
+ NTSTATUS status;
+
+ if (!init_account_policy()) {
+ return False;
+ }
+
+ if (value) {
+ *value = 0;
+ }
+
+ name = decode_account_policy_name(type);
+ if (name == NULL) {
+ DEBUG(1, ("account_policy_get: Field %d is not a valid account policy type! Cannot get, returning 0.\n", type));
+ return False;
+ }
+
+ status = dbwrap_fetch_uint32_bystring(db, name, &regval);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2, ("account_policy_get: tdb_fetch_uint32_t failed for type %d (%s), returning 0\n", type, 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(enum pdb_policy_type type, uint32_t value)
+{
+ const char *name;
+ NTSTATUS status;
+
+ if (!init_account_policy()) {
+ return False;
+ }
+
+ name = decode_account_policy_name(type);
+ if (name == NULL) {
+ DEBUG(1, ("Field %d is not a valid account policy type! Cannot set.\n", type));
+ return False;
+ }
+
+ status = dbwrap_trans_store_uint32_bystring(db, name, value);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("store_uint32_t failed for type %d (%s) on value "
+ "%u: %s\n", type, 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(enum pdb_policy_type type, uint32_t value)
+{
+ const char *policy_name = NULL;
+ char *cache_key = NULL;
+ char *cache_value = NULL;
+ bool ret = False;
+
+ policy_name = decode_account_policy_name(type);
+ 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(enum pdb_policy_type type, uint32_t *value)
+{
+ const char *policy_name = NULL;
+ char *cache_key = NULL;
+ char *cache_value = NULL;
+ bool ret = False;
+
+ policy_name = decode_account_policy_name(type);
+ 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, talloc_tos(), &cache_value, NULL)) {
+ int error = 0;
+ uint32_t tmp;
+
+ tmp = smb_strtoul(cache_value,
+ NULL,
+ 10,
+ &error,
+ SMB_STR_STANDARD);
+ if (error != 0) {
+ goto done;
+ }
+ *value = tmp;
+ ret = True;
+ }
+
+ done:
+ SAFE_FREE(cache_key);
+ TALLOC_FREE(cache_value);
+ return ret;
+}
+
+/****************************************************************************
+****************************************************************************/
+
+struct db_context *get_account_pol_db( void )
+{
+
+ if ( db == NULL ) {
+ if ( !init_account_policy() ) {
+ return NULL;
+ }
+ }
+
+ return db;
+}