public RunDES()
{
this.kg = null;
this.mg = null;
this.f = null;
msgPart = null;
}
public string RunDecrypt()
{
string output = "";
string hexoutput = "";
for (int i = 0; i < msgPart.Count; i++)
{
mg = new MsgGenerator(msgPart[i]);
bool[] fcn; // result for the f function
bool[] lXORfcn; // temporary storage for the Lside and Rside swap
for (int j = 0; j <= 15; j++)
{
fcn = f.fFunction(mg.GetRight(), kg.GetKKeyNumber(16 - j));
lXORfcn = mg.L_XOR_f(fcn);
mg.SetLeft(mg.GetRight());
mg.SetRight(lXORfcn);
}
mg.IPinvPermutation(mg.RconcatL());
hexoutput += mg.GetMsgAsHexString() + " ";
//output += mg.GetMsgAsText();
output += mg.GetMsgAsHexString();
}
Console.WriteLine("\n\nDecrypted HEX output id:\n" + hexoutput);
Console.WriteLine("\nDecrypted TEXT output is:\n" + output);
return(output);
}
public string RunEncrypt()
{ // this encryption uses the MsgGenerator and KeyGenerators
string hexoutput = "";
string textoutput = "";
for (int i = 0; i < msgPart.Count; i++) // loop for msg
{
mg = new MsgGenerator(msgPart[i]);
bool[] fcn; // result for the f function
bool[] lXORfcn; // temporary storage for the Lside and Rside swap
for (int j = 0; j <= 15; j++) // loop for rounds
{
Console.Write("L" + j + ": " + PrintBoolArray(mg.GetLeft()));
Console.WriteLine(" R" + j + ": " + PrintBoolArray(mg.GetRight()));
fcn = f.fFunction(mg.GetRight(), kg.GetKKeyNumber(j + 1));
Console.WriteLine("fcn: " + PrintBoolArray(fcn));
lXORfcn = mg.L_XOR_f(fcn);
mg.SetLeft(mg.GetRight());
mg.SetRight(lXORfcn);
}
Console.Write("L16: " + PrintBoolArray(mg.GetLeft()));
Console.WriteLine(" R16: " + PrintBoolArray(mg.GetRight()));
mg.IPinvPermutation(mg.RconcatL());
Console.WriteLine("msg: " + Helper.printBoolArray(mg.GetMsg(), 8));
//textoutput += mg.GetMsgAsText();
textoutput += mg.GetMsgAsHexString();
hexoutput += mg.GetMsgAsHexString() + " ";
}
Console.WriteLine("\nEncrypted Hex output is:\n" + hexoutput + "|");
//MessageBox.Show("HEX output:\n"+hexoutput);
//Console.WriteLine("\nEncrypted Text output:\n"+textoutput+"|");
return(textoutput);
}
public string RunEncrypt(string key, string msg)
{ // use this encryption ONLY if the string is in HEX
// else use the Constuctor and the RunEncrypt() methods above
string output = "";
kg = new KeyGenerators(key);
f = new Functions();
bool[] fcn; // result for the f function
bool[] lXORfcn; // temporary storage for the Lside and Rside swap
msg = Helper.AddPaddingToMsg(msg, 16, "0");
List <string> msgPart = Helper.SplitMsgBySize(msg, 16);
for (int i = 0; i < msgPart.Count; i++) // loop for msg
{
mg = new MsgGenerator(msgPart[i]);
for (int j = 0; j <= 15; j++) // loop for rounds
{
Console.Write("L" + j + ": " + PrintBoolArray(mg.GetLeft()));
Console.WriteLine(" R" + j + ": " + PrintBoolArray(mg.GetRight()));
fcn = f.fFunction(mg.GetRight(), kg.GetKKeyNumber(j + 1));
Console.WriteLine("fcn: " + PrintBoolArray(fcn));
lXORfcn = mg.L_XOR_f(fcn);
mg.SetLeft(mg.GetRight());
mg.SetRight(lXORfcn);
}
mg.IPinvPermutation(this.mg.RconcatL());
output += mg.GetMsgAsHexString();
}
return(output);
}