// Create key exchange material from key data.
public override byte[] CreateKeyExchange(byte[] data)
{
if (keyContainer == null)
{
throw new CryptographicException
(_("Crypto_MissingKey"));
}
if (rng == null)
{
rng = new RNGCryptoServiceProvider();
}
return(keyContainer.EncryptPKCS1(data, rng));
}