static void Main(string[] args)
{
var des = new DESEncryption();
// Create a 56 bit key for the DES to use to encrypt and decrypt
var key = des.GenerateRandomNumbers(8);
// Create a initialization vector to prevent repetition of block chipers
var iv = des.GenerateRandomNumbers(8);
const string message = "String to encrypt";
Console.WriteLine("DES Encryption / Decryption Demonstartion");
Console.WriteLine("-----------------------------------------");
var encryptedMessage = des.Encrypt(Encoding.UTF8.GetBytes(message), key, iv);
var decryptedMessage = des.Decrypt(encryptedMessage, key, iv);
Console.WriteLine();
Console.WriteLine($" original message : {message}");
Console.WriteLine($" encrypted message : {Convert.ToBase64String(encryptedMessage)}");
Console.WriteLine($" decrypted message : {Encoding.UTF8.GetString(decryptedMessage)}");
Console.WriteLine();
}
private void button1_Click(object sender, EventArgs e)
{
//byte[] iv = new byte[] { 0xCC, 0x6F, 0x4F, 0xA9, 0x7E, 0xD7, 0xB0, 0x62 };
byte[] iv = StringFromHex(textBox1.Text.Replace(" ", ""));
byte[] key = StringFromHex(textBox1.Text.Replace(" ", ""));
byte[] Setdata = StringFromHex(richTextBox1.Text.Replace(" ", ""));
try
{
if (Setdata.Length > 0)
{
try
{
if (iv.Length > 0)
{
byte[] data = new byte[0];
byte[] Decpacket = new byte[0];
byte[] Header = new byte[16];
int size = 0;
Array.Resize(ref Decpacket, Setdata.Length - 10);//Chave de Autentitaçao
Array.Copy(Setdata, 0, Decpacket, 0, Setdata.Length - 10);
size = Decpacket.Length;
byte[] SetDecpacket = new byte[0];
Array.Resize(ref SetDecpacket, Decpacket.Length + 8);//Conteudo
Array.Copy(Decpacket, 0, SetDecpacket, 8, size);
byte[] descrypt = DESEncryption.DecryptData(SetDecpacket, iv, key);
string packetDescrypt = BitConverter.ToString(descrypt).Replace("-", " ");
byte[] finalize = StringFromHex(packetDescrypt.Substring(72));
string packetDescrypt2 = BitConverter.ToString(finalize);
richTextBox2.Text = BitConverter.ToString(finalize).Replace("-", " ");
richTextBox3.Text = Encoding.ASCII.GetString(finalize);
if (isVetor == true)
{
byte[] readVetor = new byte[StringFromHex(packetDescrypt.Substring(72)).Length];
byte[] newVetor = new byte[8];
readVetor = StringFromHex(packetDescrypt.Substring(72));
Array.Copy(readVetor, 25, newVetor, 0, 8);
textBox1.Text = BitConverter.ToString(newVetor).Replace("-", " ");
}
getId(finalize);
getCompress(finalize[6]);
getLen(finalize);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
Clear();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.Source);
}
//richTextBox2.Text = BitConverter.ToString(DESEncryption.EncryptData(data,iv,key)).Replace("-"," ");
}
