/**
* Initialize from RSAPublicKey.
*
* @param RSAPublicKey $pk
* @return self
*/
public static function fromRSAPublicKey(RSAPublicKey $pk)
{
$n = ModulusParameter::fromNumber($pk->modulus());
$e = ExponentParameter::fromNumber($pk->publicExponent());
$key_type = new KeyTypeParameter(KeyTypeParameter::TYPE_RSA);
return new self($key_type, $n, $e);
}
