/**
* initialise the RSA engine.
*
* @param forEncryption true if we are encrypting, false otherwise.
* @param param the necessary RSA key parameters.
*/
public void Init(
bool forEncryption,
ICipherParameters parameters)
{
if (parameters is ParametersWithRandom)
{
parameters = ((ParametersWithRandom) parameters).Parameters;
}
if (!(parameters is RsaKeyParameters))
throw new InvalidKeyException("Not an RSA key");
this.key = (RsaKeyParameters) parameters;
this.forEncryption = forEncryption;
this.bitSize = key.Modulus.BitLength;
}
