public static Decryption keyGet(string filename)
{
string readText = TextHandler.Reader(filename);
Decryption decryptKey = new Decryption(null, null, null);
int orderCount = readText.IndexOf("cthulhu");
int x = 0;
int[] orders = new int[decryptKey.characters.Count()];
while (x < orderCount / 2)
{
string orderString = readText.Substring(0, 2); //reads next two-digit number from text header
string tempString = string.Empty;
int lengthHolder = tempString.Length;
int addZeros = 0;
if (orderString.IndexOf("0") == 0) //check for leading zero on order number
{
orderString = orderString.Substring(1); //if there is a leading zero remove it
}
else
{
}
decryptKey.order[x] = Convert.ToInt32(orderString); //converts order above to int
//create binary value from order int
tempString = Convert.ToString(decryptKey.order[x], 2);
//convert tempString (binary equivalent of order) to 6-digit binary with leading zeroes
if (tempString.Length == 6)
{
} //already ok
else if (tempString.Length < 6) //add leading zeroes
{
lengthHolder = tempString.Length;
for (addZeros = 0; addZeros < (6 - lengthHolder); addZeros++)
{
tempString = "0" + tempString;
}
}
decryptKey.binary[x] = tempString;
tempString = string.Empty;
lengthHolder = 0;
x++;
readText = readText.Substring(2);
}
return(decryptKey);
}
private void btn_Decrypt_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Filter = "cthulhu Files (*.cthulhu)|*.cthulhu";
string openFileName = string.Empty;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
openFileName = openFileDialog1.FileName;
}
Decryption decryptKey = Decryption.keyGet(openFileName);
string[] binaryString = Decryption.binaryGet(openFileName);
tb_Output.Text = Decryption.Decrypt(decryptKey, binaryString);
//Console.WriteLine(Decryption.Decrypt(decryptKey, binaryString));
}
public static string Decrypt(Decryption decryptKey, string[] binaries)
{
string plaintextString = string.Empty;
for (int x = 0; x < binaries.Count(); x++)
{
for (int y = 0; y < decryptKey.binary.Count(); y++)
{
bool testBool = binaries[x] == decryptKey.binary[y];
if (binaries[x] == decryptKey.binary[y])
{
plaintextString = plaintextString + decryptKey.characters[y];
break;
}
else
{
}
}
}
return(plaintextString);
}