<?php
// $Header: /cvsroot/phpldapadmin/phpldapadmin/login.php,v 1.40 2005/03/16 11:20:25 wurley Exp $

/**
 * For servers whose auth_type is set to 'cookie' or 'session'. Pass me the login info
 * and I'll write two cookies, pla_login_dn_X and pla_pass_X
 * where X is the server_id. The cookie_time comes from config.php
 *
 * Note: this file uses ldap_connect() and ldap_bind() only for purposes
 *       of verifying the user-supplied DN and Password.
 *
 * Variables that come in as POST vars:
 *  - login_dn
 *  - login_pass
 *  - server_id
 *
 * @package phpLDAPadmin
 */
/**
 */

require './common.php';

// Prevents users from coming here without going through the proper channels
isset( $_POST['server_id'] ) or header( "Location: index.php" );

$server_id = $_POST['server_id'];
$ldapserver = new LDAPServer($server_id);

$dn = isset( $_POST['login_dn'] ) ? $_POST['login_dn'] : null;
$uid = isset( $_POST['uid'] ) ? $_POST['uid'] : null;
$pass = isset( $_POST['login_pass'] ) ? $_POST['login_pass'] : null;
$anon_bind = isset( $_POST['anonymous_bind'] ) && $_POST['anonymous_bind'] == 'on' ? true : false;

if( ! $anon_bind )
	strlen($pass) or pla_error( $lang['password_blank'] );

$save_auth_type = $ldapserver->auth_type;

if( $anon_bind ) {
	$dn = null;
	$pass = null;
}

// Checks if the login_attr option is enabled for this host,
// which allows users to login with a simple username like 'jdoe' rather
// than the fully qualified DN, 'uid=jdoe,ou=people,,dc=example,dc=com'.
elseif ( $ldapserver->isLoginAttrEnabled() ) {

	// Is this a login string (printf-style)
	if( $ldapserver->isLoginStringEnabled() ) {
		$dn = str_replace( '<username>', $uid, $ldapserver->getLoginString() );

	} else {
		// This is a standard login_attr

		// Fake the auth_type of config to do searching. This way, the admin can specify
		// the DN to use when searching for the login_attr user.
		$ldapserver->auth_type = 'config';

		// search for the "uid" first, this will be an anonymous bind.
		set_error_handler( 'temp_login_error_handler' );
		$ldapserver->connect(true,true);
		restore_error_handler();

		if (!empty($servers[$ldapserver->server_id]['login_class'])) {
			$filter = '(&(objectClass='.$servers[$ldapserver->server_id]['login_class'].')('.$servers[$ldapserver->server_id]['login_attr'].'='.$uid.'))';
		} else {
			$filter = $servers[$ldapserver->server_id]['login_attr'].'='.$uid;
		}

		// Got through each of the BASE DNs and test the login.
		foreach ($ldapserver->getBaseDN() as $base_dn) {
			debug_log(sprintf('login.php: Searching LDAP with base [%s]',$base_dn),9);
			$sr = @ldap_search($ldapserver->connect(false), $base_dn, $filter, array('dn'), 0, 1);
			$result = @ldap_get_entries($ldapserver->connect(false), $sr);
			$dn = isset( $result[0]['dn'] ) ? $result[0]['dn'] : false;

			if ($dn) {
				debug_log(sprintf('login.php: Got DN [%s] for user ID [%s]',$dn,$uid),5);
				break;
			}
		}

		// If we got here then we werent able to find a DN for the login filter.
		if( ! $dn ) {
			pla_error( $lang['bad_user_name_or_password'] );
		}

		// restore the original auth_type
		$ldapserver->auth_type = $save_auth_type;
	}
}

// We fake a 'config' server auth_type to omit duplicated code
debug_log(sprintf('Setting login type to config with DN [%s]',$dn),9);
$save_auth_type = $ldapserver->auth_type;
$ldapserver->auth_type = 'config';
$servers[$ldapserver->server_id]['login_dn'] = $dn;
$servers[$ldapserver->server_id]['login_pass'] = $pass;

// Verify that dn is allowed to login
if ( ! userIsAllowedLogin($ldapserver,$dn) )
	pla_error( $lang['login_not_allowed'] );

debug_log(sprintf('User is not prohibited from logging in - now bind [%s]',$dn),9);
// verify that the login is good
if( null == $dn && null == $pass )
	$ds = $ldapserver->connect(true,true,true);
else
	$ds = $ldapserver->connect(true,false,true);

debug_log(sprintf('login.php: ds is a [%s]',$ds),9);

if( ! is_resource( $ds ) ) {
	if( $anon_bind )
		pla_error( $lang['could_not_bind_anon'] );
	else
		pla_error( $lang['bad_user_name_or_password'] );

	syslog_msg ( LOG_NOTICE,"Authentification FAILED for $dn" );
}

$ldapserver->auth_type = $save_auth_type;
set_login_dn( $ldapserver, $dn, $pass, $anon_bind ) or pla_error( $lang['could_not_set_cookie'] );
set_lastactivity( $ldapserver );

initialize_session_tree();
$_SESSION['tree'][$ldapserver->server_id] = array();
$_SESSION['tree_icons'][$ldapserver->server_id] = array();

if( ! $anon_bind ) {
	syslog_msg ( LOG_NOTICE,"Authentification successful for $dn" );
}

session_write_close();

include realpath( 'header.php' );
?>

<body>

<script language="javascript">
	<?php if( $anon_bind && anon_bind_tree_disabled() )  { ?>
		parent.location.href='search.php?server_id=<?php echo $ldapserver->server_id; ?>'
	<?php } else {  ?>
		parent.left_frame.location.reload();
	<?php } ?>

	<?php if ( isset($custom_welcome_page) and $custom_welcome_page ) { ?>
		parent.right_frame.location.href='welcome.php';
	<?php } ?>
</script>

<center>
<br />
<br />
<br />
<?php echo sprintf( $lang['successfully_logged_in_to_server'],
	htmlspecialchars( $ldapserver->name ) ); ?><br />
<?php if( $anon_bind ) { ?>
	(<?php echo $lang['anonymous_bind']; ?>)
<?php } ?>
<br />
</center>

</body>
</html>

<?php
/**
 * Only gets called when we fail to login.
 */
function temp_login_error_handler( $errno, $errstr, $file, $lineno )
{
	global $lang;
	if( 0 == ini_get( 'error_reporting' ) || 0 == error_reporting() )
		return;
	pla_error( $lang['could_not_connect'] . "<br /><br />" . htmlspecialchars( $errstr ) );
}
?>
