/**
* Selects the appropriate hashing class.
*/
public function __construct()
{
if (extension_loaded('openssl')) {
$this->hash = new OpenSsl();
} elseif (class_exists('Crypt_RSA')) {
$this->hash = new PhpSeclib();
} else {
throw SignatureException::create('The "openssl" extension and "phpseclib" libraries are not available.');
}
}
