//Decrypt button
private void Button_Click_1(object sender, RoutedEventArgs e)
{
//Decrypt button to decrypt the hex message with the key and IV from the text boxes
Stopwatch sw = new Stopwatch();
sw.Start();
if (cbi.SelectedIndex == 0)
{ // Decrypt DES encryption
// Create new DES instantiation
var des = new DesEncryption();
// key and iv converted to byte arrays to be used in the Decrypt method below
byte[] key = Convert.FromBase64String(key_box.Text);
byte[] iv = Convert.FromBase64String(IV_box.Text);
// Decryption method takes in the encrypted hexidecimal-text from the textbox and the key/iv byte arrays
var decryptedText = des.Decrypt(Convert.FromBase64String(hex_decrypt.Text), key, iv);
// send the decrypted text to ASCI text box in View
Chiphertext.Text = Encoding.UTF8.GetString(decryptedText);
}
else if (cbi.SelectedIndex == 1)
{ // Decrypt TripleDES encryption
// Create new TripleDES instantiation
var tdes = new TDESEncryption();
// key and iv converted to byte arrays to be used in the Decrypt method below
byte[] key = Convert.FromBase64String(key_box.Text);
byte[] iv = Convert.FromBase64String(IV_box.Text);
// Decryption method takes in the encrypted hexidecimal-text from the textbox and the key/iv byte arrays
var decryptedText = tdes.Decrypt(Convert.FromBase64String(hex_decrypt.Text), key, iv);
// send the decrypted text to ASCI text box in View
Chiphertext.Text = Encoding.UTF8.GetString(decryptedText);
}
else if (cbi.SelectedIndex == 2)
{ // Decrypt AES encryption
// Create new AES instantiation
var aes = new AESEncryption();
// key and iv converted to byte arrays to be used in the Decrypt method below
byte[] key = Convert.FromBase64String(key_box.Text);
byte[] iv = Convert.FromBase64String(IV_box.Text);
// Decryption method takes in the encrypted hexidecimal-text from the textbox and the key/iv byte arrays
var decryptedText = aes.Decrypt(Convert.FromBase64String(hex_decrypt.Text), key, iv);
// send the decrypted text to ASCI text box in View
Chiphertext.Text = Encoding.UTF8.GetString(decryptedText);
}
//Stops the Stopwatch and saves the times used to encrypt/decrypt the message.
sw.Stop();
TimeSpan time2 = sw.Elapsed;
//Display the saved time in miliseconds
DecryptTextBlock.Text = time2.TotalMilliseconds.ToString() + "ms";
}
//Generate Key and IV button
private void Button_Click(object sender, RoutedEventArgs e)
{
// generate a key and IV and show them in the text boxes: "key_box" and "IV_box"
if (cbi.SelectedIndex == 0)
{ // DES key/IV generator
// Create new DES instantiation
var des = new DesEncryption();
// Generate DES Key and IV
var key = des.GenerateRandomNumber(8);
var iv = des.GenerateRandomNumber(8);
// Send the generated keys to the View text boxes as strings
key_box.Text = Convert.ToBase64String(key);
IV_box.Text = Convert.ToBase64String(iv);
}
else if (cbi.SelectedIndex == 1)
{ // TripleDES key/IV Generator
// Create new TripleDES instantiation
var des = new TDESEncryption();
// Generate TripleDES Key and IV
var key = des.GenerateRandomNumber(16);
var iv = des.GenerateRandomNumber(8);
// Send the generated keys to the View text boxes as strings
key_box.Text = Convert.ToBase64String(key);
IV_box.Text = Convert.ToBase64String(iv);
}
else if (cbi.SelectedIndex == 2)
{ // AES key/IV generator
// Create new AES instantiation
var des = new AESEncryption();
// Generate AES Key and IV
var key = des.GenerateRandomNumber(32);
var iv = des.GenerateRandomNumber(16);
// Send the generated keys to the View text boxes as strings
key_box.Text = Convert.ToBase64String(key);
IV_box.Text = Convert.ToBase64String(iv);
}
}
// Encrypt button
private void Button_Click_2(object sender, RoutedEventArgs e)
{
//Encrypt button to encrypt the plaintext message with the keys generated
Stopwatch sw = new Stopwatch();
sw.Start();
if (cbi.SelectedIndex == 0)
{
// Decryption DES
// Create new DES instantiation
var des = new DesEncryption();
// Get key/IV strings from the View text boxes and convert them to byte arrays
byte[] key = Convert.FromBase64String(key_box.Text);
byte[] iv = Convert.FromBase64String(IV_box.Text);
// Copy the text string from the plaintext box in a string variable for the encryption method
string plaintext = Plaintext.Text;
// Encrypt the plaintext method with the plaintext, key and iv.
var encryptedText = des.Encrypt(Encoding.UTF8.GetBytes(plaintext), key, iv);
// send the encrypted text message to the encrypted hex box and decrypted hex box
hex_encrypt.Text = Convert.ToBase64String(encryptedText);
hex_decrypt.Text = Convert.ToBase64String(encryptedText);
}
else if (cbi.SelectedIndex == 1)
{
// Decryption TripleDES
// Create new TripleDES instantiation
var des = new TDESEncryption();
// Get key/IV strings from the View text boxes and convert them to byte arrays
byte[] key = Convert.FromBase64String(key_box.Text);
byte[] iv = Convert.FromBase64String(IV_box.Text);
// Copy the text string from the plaintext box in a string variable for the encryption method
string plaintext = Plaintext.Text;
// Encrypt the plaintext method with the plaintext, key and iv.
var encryptedText = des.Encrypt(Encoding.UTF8.GetBytes(plaintext), key, iv);
// send the encrypted text message to the encrypted hex box and decrypted hex box
hex_encrypt.Text = Convert.ToBase64String(encryptedText);
hex_decrypt.Text = Convert.ToBase64String(encryptedText);
}
else if (cbi.SelectedIndex == 2)
{
// Decryption AES
// Create new AES instantiation
var des = new AESEncryption();
// Get key/IV strings from the View text boxes and convert them to byte arrays
byte[] key = Convert.FromBase64String(key_box.Text);
byte[] iv = Convert.FromBase64String(IV_box.Text);
// Copy the text string from the plaintext box in a string variable for the encryption method
string plaintext = Plaintext.Text;
// Encrypt the plaintext method with the plaintext, key and iv.
var encryptedText = des.Encrypt(Encoding.UTF8.GetBytes(plaintext), key, iv);
// send the encrypted text message to the encrypted hex box and decrypted hex box
hex_encrypt.Text = Convert.ToBase64String(encryptedText);
hex_decrypt.Text = Convert.ToBase64String(encryptedText);
}
sw.Stop();
TimeSpan time1 = sw.Elapsed;
EncryptTextBlock.Text = time1.TotalMilliseconds.ToString() + "ms";
}