public EncryptedImage Encrypt(byte[] inputImage)
{
Stopwatch s = new Stopwatch();
s.Start();
int partsNum = GetPartsNumber(inputImage);
int partSize = inputImage.Length / partsNum;
byte[][] imageParts = inputImage.Split(partSize).Select(sl => sl.ToArray()).ToArray();
partsNum = imageParts.Length;
EncryptedImage output = new EncryptedImage(partsNum);
Parallel.For(0, partsNum, i => {
BigInteger tempNumber = new BigInteger(imageParts[i]);
int sign = tempNumber.Sign;
if (sign == -1)
{
tempNumber *= -1;
}
tempNumber = BigInteger.ModPow(tempNumber, e, n);
output.AddEncryptedNumber(tempNumber, sign, imageParts[i].Length, i);
});
output.PrivateKey = Tuple.Create(d, n);
s.Stop();
initTime = s.ElapsedMilliseconds;
return(output);
}
public byte[] Decrypt(EncryptedImage image)
{
Stopwatch s = new Stopwatch();
s.Start();
byte[][] output = new byte[image.EncryptedData.Count][];
Parallel.For(0, image.EncryptedData.Count, i => {
BigInteger tempNumber = image.EncryptedData[i].Item1;
tempNumber = BigInteger.ModPow(tempNumber, image.PrivateKey.Item1, image.PrivateKey.Item2);
if (image.EncryptedData[i].Item2 == -1)
{
tempNumber *= -1;
}
var tempArray = tempNumber.ToByteArray().ToList();
if (tempArray.Count != image.EncryptedData[i].Item3)
{
tempArray.Add((image.EncryptedData[i].Item2 == -1) ? (byte)0xFF : (byte)0x00);
}
output[i] = tempArray.ToArray();
});
s.Stop();
initTime = s.ElapsedMilliseconds;
return(output.SelectMany(sm => sm).ToArray());
}
private void Btn_EncryptImage_Click(object sender, RoutedEventArgs e)
{
if (EncryptionCore != null)
{
StatusLabel.Text = "Encryption in progress...";
Task.Factory.StartNew(() => {
encryptedImage = EncryptionCore.Encrypt(InputImage);
StatusLabel.Dispatcher.Invoke(() =>
{
StatusLabel.Text = string.Format("Encryption done in {0} ms!", EncryptionCore.initTime);
Btn_SaveImage.IsEnabled = true;
});
});
}
else
{
System.Windows.MessageBox.Show("Please wait for encryption core initialization!", "Please wait", MessageBoxButton.OK, MessageBoxImage.Asterisk);
}
}
private void Btn_LoadImage_Click(object sender, RoutedEventArgs e)
{
Btn_EncryptImage.IsEnabled = false;
Btn_DecryptImage.IsEnabled = false;
Btn_SaveImage.IsEnabled = false;
encrypting = true;
OpenFileDialog imageDialog = new OpenFileDialog()
{
InitialDirectory = "G:\\",
Filter = "jpg images (*.jpg)|*.jpg|Encrypted image (*.eims)|*.eims",
RestoreDirectory = true,
AddExtension = true
};
if (imageDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
if (imageDialog.FileName.Split('.').Last() == "jpg")
{
InputImage = File.ReadAllBytes(imageDialog.FileName);
Btn_EncryptImage.IsEnabled = true;
encrypting = true;
}
if (imageDialog.FileName.Split('.').Last() == "eims")
{
IFormatter formatter = new BinaryFormatter();
using (Stream stream = new FileStream(imageDialog.FileName, FileMode.Open, FileAccess.Read, FileShare.None))
{
encryptedImage = (EncryptedImage)formatter.Deserialize(stream);
}
if (encryptedImage != null)
{
encrypting = false;
Btn_DecryptImage.IsEnabled = true;
}
}
}
}
