您可以使用phpseclib，这是一个纯PHP RSA实现：
<?phpinclude('Crypt/RSA.php');$privatekey = file_get_contents('private.key');$rsa = new Crypt_RSA();$rsa->loadKey($privatekey);$plaintext = new Math_BigInteger('aaaaaa');echo $rsa->_exponentiate($plaintext)->toBytes();?>
