private void processEncryptDecrypt(int EncDec)
{
try
{
var tripledes = new TripleDESEncryption();
key = txtKey.Text.Trim() == "" ? EncDec == ENC?RandomCryptography.Random.GenerateRandomNumber(24) : key : Encoding.UTF8.GetBytes(txtKey.Text.Trim());
iv = txtIV.Text.Trim() == "" ? EncDec == ENC?RandomCryptography.Random.GenerateRandomNumber(8) : iv : Encoding.UTF8.GetBytes(txtIV.Text.Trim());
var crypted = EncDec == ENC?tripledes.Encrypt(Encoding.UTF8.GetBytes(txtOriginal.Text), key, iv) : tripledes.Decrypt(Convert.FromBase64String(txtEncrypted.Text), key, iv);
switch (EncDec)
{
case ENC:
txtEncrypted.Text = Convert.ToBase64String(crypted);
break;
case DEC:
txtDecrypted.Text = Encoding.UTF8.GetString(crypted);
break;
}
txtHexaKey.Text = BitConverter.ToString(key);
txtHexaIV.Text = BitConverter.ToString(iv);
}
catch (Exception exc)
{
MessageBox.Show("Error!\n" + exc);
}
}
private void Encrypt_Click(object sender, EventArgs e)
{
var trippleDes = new TripleDESEncryption();
var key = trippleDes.GenerateRandomNumber(16);
var iv = trippleDes.GenerateRandomNumber(8);
Image I = OImage.Image;
var data = ImageToByteArray(I);
var encrypted = trippleDes.Encrypt(data, key, iv);
var encryptedMessage = Encoding.UTF8.GetString(encrypted);
EncryptedMessage.Text = encryptedMessage;
}
static void Main(string[] args)
{
var des = new TripleDESEncryption();
// Create 3 keys (3 64 bit keys)
var key = des.GenerateRandomNumbers(24); // use des.GenerateRandomNumbers(16); for 2 64 bit keys
// Create a initialization vector to prevent repetition of block chipers
var iv = des.GenerateRandomNumbers(8);
const string message = "String to encrypt";
Console.WriteLine("Triple 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();
}
