function main($crypted)
{
$rsa = new Rsa();
if ($crypted) {
$crypted = base64_decode($crypted);
} else {
$crypted = $rsa->rsaEncrypt("*****@*****.**");
echo "encrypt base64:" . base64_encode($crypted) . "\n";
}
$decrypted = $rsa->rsaDecrypt($crypted);
echo "encrypt and decrypt:" . $decrypted . "\n";
}