public override ElGamalModifiedParameters ExportParameters(bool p_include_private_params)
{
if (NeedToGenerateKey())
{
CreateKeyPair(KeySizeValue);
}
// create the parameter set and set the public values of the parameters
var x_params = new ElGamalModifiedParameters
{
P = o_key_struct.P.ToByteArray(),
G = o_key_struct.G.ToByteArray(),
Y = o_key_struct.Y.ToByteArray(),
//Padding = o_key_struct.Padding
};
// if required, include the private value, X
if (p_include_private_params)
{
x_params.X = o_key_struct.X.ToByteArray();
}
else
{
// ensure that we zero the value
x_params.X = new byte[1];
}
return(x_params);
}
public override void FromXmlString(string p_string)
{
var x_params = new ElGamalModifiedParameters();
var keyValues = XDocument.Parse(p_string).Element("ElGamalKeyValue");
x_params.P = Convert.FromBase64String((String)keyValues.Element("P") ?? "");
x_params.G = Convert.FromBase64String((String)keyValues.Element("G") ?? "");
x_params.Y = Convert.FromBase64String((String)keyValues.Element("Y") ?? "");
//x_params.Padding = (ElGamalPaddingMode)Enum.Parse(typeof(ElGamalPaddingMode), (String)keyValues.Element("Padding") ?? "");
x_params.X = Convert.FromBase64String((String)keyValues.Element("X") ?? "");
ImportParameters(x_params);
}
public override void ImportParameters(ElGamalModifiedParameters p_parameters)
{
// obtain the big integer values from the byte parameter values
o_key_struct.P = new BigInteger(p_parameters.P);
o_key_struct.G = new BigInteger(p_parameters.G);
o_key_struct.Y = new BigInteger(p_parameters.Y);
//o_key_struct.Padding = p_parameters.Padding;
if (p_parameters.X != null && p_parameters.X.Length > 0)
{
o_key_struct.X = new BigInteger(p_parameters.X);
}
// set the length of the key based on the import
KeySizeValue = o_key_struct.P.BitCount();
//Padding = o_key_struct.Padding;
}
//public ElGamalPaddingMode Padding;
public abstract void ImportParameters(ElGamalModifiedParameters p_parameters);
