public static function generateKeys($password, $nonce)
{
$array = array("key", "key", "key", "key");
$array2 = array(1, 2, 3, 4);
$nonce .= '0';
for ($j = 0; $j < count($array); $j++) {
$nonce[strlen($nonce) - 1] = chr($array2[$j]);
$foo = Cryptography::waPbkdf2("sha1", $password, $nonce, 2, 20, true);
$array[$j] = $foo;
}
return $array;
}
