<?php

// Migrate passwords to the new encryption scheme

global $db, $session, $paths, $template, $plugins; // Common objects
require_once(ENANO_ROOT . '/includes/hmac.php');

@set_time_limit(0);

$q = $db->sql_query('UPDATE ' . table_prefix . "users SET old_encryption = 2 WHERE user_id > 1 AND old_encryption = 0;");
if ( !$q )
	$db->_die();

$q = $db->sql_query('SELECT user_id, password FROM ' . table_prefix . "users WHERE user_id > 1 AND old_encryption = 2;");
if ( !$q )
	$db->_die();

while ( $row = $db->fetchrow($q) )
{
	$password = $session->pk_decrypt($row['password']);
	if ( empty($password) )
	{
		global $ui;
		echo '<p>1.1.5-1.1.6 migration script: ERROR: bad password returned from $session->pk_decrypt()</p>';
		$ui->show_footer();
		exit;
	}
	$hmac_secret = hexencode(AESCrypt::randkey(20), '', '');
	$password = hmac_sha1($password, $hmac_secret);
	$e = $db->sql_query('UPDATE ' . table_prefix . "users SET password = '{$password}', password_salt = '{$hmac_secret}', old_encryption = 0 WHERE user_id = {$row['user_id']};");
	if ( !$e )
		$db->_die();
}