private void DecryptCBC()
{
try
{
string input = txt_input.Text.Replace(" ", string.Empty).ToLower().Trim();
if (IsValidHex(input) && input.Length % 16 == 0)
{
DESCBC descbc = new DESCBC(key, iv);
descbc.Create();
descbc.DecryptCBC(input);
rtb_main.Text = $"Input: {input.ToUpper()}\nOutput: {descbc.CbcDecryptText}";
lbl_output.Text = "";
}
else
{
if (!IsValidHex(input))
{
MessageBox.Show("Input must be 64-bit Hexadecimal format", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
txt_input.Text = input.PadLeft((16 * ((input.Length / 16) + 1)), '0').ToUpper();
DecryptCBC();
}
}
catch (Exception ex)
{
MessageBox.Show("Keys or IV not saved!", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
public void TestMethod1()
{
DESCBC dcbc = new DESCBC("AABB09182736CCDD", "AAAAAAAAAAAAAAAA");
dcbc.Create();
dcbc.EncryptCBC("0000000000000000ABCDEF1234567890");
var x = dcbc.CbcCipherText;
//DES.DES a = new DES.DES("ffffffffffffffff");
//DESModules m = new DESModules();
//a.Create();
//string res = a.Encrypt("1234567890abcdef");
//int[] l = m.HexStringToIntArray("5a78e394");
//int[] cpy = l;
//int[] r = m.HexStringToIntArray("4a1210f6");
//int[] temp = new int[32];
//m.Function(r, ref temp, a.roundKeys[2]);
//string testkey = m.BinArrayToHex(a.roundKeys[2]);
//int[] t2 = m.XOR(cpy, temp);
//string test = m.BinArrayToHex(t2);
}
