private void startRound(int round)
{
String val1 = "";
String val2 = "";
if (action == "Encrypt")
{
val1 = key1;
val2 = key2;
}
else
if (action == "Decrypt")
{
val1 = key2;
val2 = key1;
}
if (round == 1)
{
mainLeftPart = IPtext.Substring(0, 4);
mainRightPart = IPtext.Substring(4, 4);
}
finalRightPart = mainRightPart;
mainRightPart = EP();
if (round == 1)
{
mainRightPart = CipherSupport.bitXor(mainRightPart, val1);
}
else
if (round == 2)
{
mainRightPart = CipherSupport.bitXor(mainRightPart, val2);
}
leftPart = mainRightPart.Substring(0, 4);
rightPart = mainRightPart.Substring(4, 4);
Dictionary <String, int> bitConvert = new Dictionary <String, int>();
bitConvert["00"] = 0;
bitConvert["01"] = 1;
bitConvert["10"] = 2;
bitConvert["11"] = 3;
int S0_ROW = bitConvert[leftPart[0].ToString() + leftPart[3].ToString()];
int S0_COL = bitConvert[leftPart[1].ToString() + leftPart[2].ToString()];
int S1_ROW = bitConvert[rightPart[0].ToString() + rightPart[3].ToString()];
int S1_COL = bitConvert[rightPart[1].ToString() + rightPart[2].ToString()];
leftPart = S0[S0_ROW, S0_COL];
rightPart = S1[S1_ROW, S1_COL];
mainRightPart = String.Concat(leftPart, rightPart);
mainRightPart = P4();
finalLeftPart = CipherSupport.bitXor(mainLeftPart, mainRightPart);
}
private void textBox4_TextChanged(object sender, EventArgs e)
{
if (textBox4.Text == tb4Text)
{
return;
}
if (textBox4.Text == "" && tb4Text != "")
{
tb4Text = textBox4.Text;
return;
}
char value = textBox4.Text[textBox4.Text.Length - 1];
if (CipherSupport.isBit(value))
{
tb4Text = textBox4.Text;
return;
}
else
{
textBox4.Text = tb4Text;
}
tb4Text = textBox4.Text;
textBox4.SelectionStart = textBox4.Text.Length;
}
