private void Encrptbtn_Click(object sender, RoutedEventArgs e)
{
RSA2017TestDBContext context = new RSA2017TestDBContext();
Stopwatch timer = new Stopwatch();
Timerlbl.Content = timer.ElapsedMilliseconds.ToString();
var currentUser = context.RSA2017TestDB.Where(m => m.Username == SelectUser.Text).FirstOrDefault();
try
{
BigInteger Dp = BigInteger.Parse(currentUser.MyKeys.Dp);
BigInteger Dq = BigInteger.Parse(currentUser.MyKeys.Dq);
BigInteger Qinv = BigInteger.Parse(currentUser.MyKeys.Qinv);
BigInteger P = BigInteger.Parse(currentUser.MyKeys.P);
BigInteger Q = BigInteger.Parse(currentUser.MyKeys.Q);
BigInteger D = BigInteger.Parse(currentUser.MyKeys.D);
BigInteger n = BigInteger.Parse(currentUser.MyKeys.N);
int Size = currentUser.MyKeys.KeySize;
string[] Input = PlainTxtBlock.Text.Split('$');
string[] output = new string[Input.Length];
byte[] dataToEncrypt = new byte[Size];
timer.Reset();
for (int i = 0; i <= (Input.Length - 1); i++)
{
byte[] data = new byte[Size];
byte[] use = new byte[Size];
string Decrypted = string.Empty;
if (Input[i] == string.Empty)
{
Input[i] = Input[i] + " ";
}
timer.Start();
data = Convert.FromBase64String(Input[i]);
use = RSAMain.Decrypt(data, Dp, Dq, Qinv, P, Q, Size, D, n);
Decrypted = Encoding.UTF8.GetString(use);
output[i] = Decrypted;
Timerlbl.Content = timer.ElapsedMilliseconds.ToString();
}
EncryptedTxtBlock.Text = string.Join(" ", output);
timer.Stop();
Timerlbl.Content = timer.ElapsedMilliseconds.ToString();
Savebtn.IsEnabled = true;
}
catch (Exception)
{
MessageBox.Show("Decryption Failed!");
}
}
private void Encrptbtn_Click(object sender, RoutedEventArgs e)
{
Stopwatch timer = new Stopwatch();
Timerlbl.Content = timer.ElapsedMilliseconds.ToString();
RSA2017TestDBContext context = new RSA2017TestDBContext();
var currentUser = context.RSA2017TestDB.Where(m => m.Username == SelectUser.Text).FirstOrDefault();
try
{
BigInteger Ep = BigInteger.Parse(currentUser.MyKeys.Ep);
BigInteger Eq = BigInteger.Parse(currentUser.MyKeys.Eq);
BigInteger Qinv = BigInteger.Parse(currentUser.MyKeys.Qinv);
BigInteger P = BigInteger.Parse(currentUser.MyKeys.P);
BigInteger Q = BigInteger.Parse(currentUser.MyKeys.Q);
BigInteger E = BigInteger.Parse(currentUser.MyKeys.E);
BigInteger N = BigInteger.Parse(currentUser.MyKeys.N);
int Size = currentUser.MyKeys.KeySize;
string[] Input = PlainTxtBlock.Text.Split(' ');
string[] output = new string[Input.Length];
byte[] dataToEncrypt = new byte[Size];
timer.Reset();
for (int i = 0; i <= (Input.Length - 1); i++)
{
string Encrypted = string.Empty;
if (Input[i] == string.Empty)
{
Input[i] = Input[i] + " ";
}
timer.Start();
byte[] data = Encoding.UTF8.GetBytes(Input[i]);
byte[] use = RSAMain.Encrypt(data, Ep, Eq, Qinv, P, Q, Size, E, N);
Encrypted = Convert.ToBase64String(use);
output[i] = Encrypted;
}
EncryptedTxtBlock.Text = string.Join("$", output);
Timerlbl.Content = timer.ElapsedMilliseconds.ToString();
timer.Stop();
Timerlbl.Content = timer.ElapsedMilliseconds.ToString();
Savebtn.IsEnabled = true;
}
catch (Exception)
{
MessageBox.Show("Select a receiver");
}
}
private async void Sign_Up_Click(object sender, RoutedEventArgs e)
{
Stopwatch keyGenTime = new Stopwatch();
if (!string.IsNullOrWhiteSpace(Name.Text) && !string.IsNullOrWhiteSpace(Username.Text) && !string.IsNullOrWhiteSpace(Password.Password) && !string.IsNullOrWhiteSpace(ConfirmPassword.Password))
{
if (string.Equals(Password.Password, ConfirmPassword.Password))
{
int SelectedKeySize = int.Parse(KeySizeBox.Text);
MyRSAProvider.MyMyKeys rsa = new MyRSAProvider.MyMyKeys();
keyGenTime.Reset();
keyGenTime.Start();
rsa = RSAMain.GenerateKey(SelectedKeySize);
keyGenTime.Stop();
KeyGenTime.Content = keyGenTime.ElapsedMilliseconds.ToString();
var newPublicKey = rsa.PublicKey.FirstOrDefault();
var newPrivateKey = rsa.PrivateKey.FirstOrDefault();
string publicKey = newPublicKey.E;
string privateKey = newPrivateKey.D;
string modulus = newPrivateKey.N;
string Dp = newPrivateKey.Dp;
string Dq = newPrivateKey.Dq;
string Qinv = newPrivateKey.Qinv;
string P = newPrivateKey.P;
string Q = newPrivateKey.Q;
string Ep = newPrivateKey.Dp;
string Eq = newPrivateKey.Dq;
string Id = DateTime.Now.ToString();
RSA2017TestDBContext context = new RSA2017TestDBContext();
var CheckUsername = context.RSA2017TestDB.Where(m => m.Username == Username.Text).FirstOrDefault();
MessageBox.Show("User has been created and keys have been generated for the user.\nClick OK to be redirected to landing page.");
if (CheckUsername == null)
{
var UserKey = context.MyKeys.Add(new MyKeys {
KeyId = Id, D = privateKey, E = publicKey, KeySize = SelectedKeySize, N = modulus, Dp = Dp, Dq = Dq, Ep = Ep, Eq = Eq, P = P, Q = Q, Qinv = Qinv
});
var NewUser = context.RSA2017TestDB.Add(new RSA2017TestDB {
KeyId = Id, Name = Name.Text, PassWord = Password.Password, UserId = Id, Username = Username.Text, MyKeys = UserKey, Email = EmailTxt.Text
});
await context.SaveChangesAsync();
this.NavigationService.Navigate(new RSAIndex(NewUser.UserId));
}
else
{
ErrorMsg.Content = "Username already exist.";
ErrorMsg.Visibility = Visibility.Visible;
}
}
else
{
ErrorMsg.Content = "Password and Confirm Password doesn't match.";
ErrorMsg.Visibility = Visibility.Visible;
}
}
else
{
ErrorMsg.Content = "Enter valid details and try again.";
ErrorMsg.Visibility = Visibility.Visible;
}
}
private void Encrptbtn_Click(object sender, RoutedEventArgs e)
{
RSA2017TestDBContext context = new RSA2017TestDBContext();
BitmapImage EncryptedImage = new BitmapImage();
var currentUser = context.RSA2017TestDB.Where(m => m.Username == SelectUser.Text).FirstOrDefault();
int l = 0;
try
{
BigInteger Ep = BigInteger.Parse(currentUser.MyKeys.Ep);
BigInteger Eq = BigInteger.Parse(currentUser.MyKeys.Eq);
BigInteger Qinv = BigInteger.Parse(currentUser.MyKeys.Qinv);
BigInteger P = BigInteger.Parse(currentUser.MyKeys.P);
BigInteger Q = BigInteger.Parse(currentUser.MyKeys.Q);
BigInteger E = BigInteger.Parse(currentUser.MyKeys.E);
BigInteger N = BigInteger.Parse(currentUser.MyKeys.N);
int Size = currentUser.MyKeys.KeySize;
byte[] EncryptedBytes;
byte[] NewImg = new byte[(34 * Size) * (Imgbytes.Length / 100)];
byte[] Encrypted = new byte[Imgbytes.Length];
int count = 0;
for (int i = 0; i < Imgbytes.Length;)
{
byte[] bitsOfBytes = new byte[100];
for (int j = 0; j < 100; j++)
{
l = i + j;
if (l == (Imgbytes.Length - 1))
{
break;
}
bitsOfBytes[j] = Imgbytes[l];
}
try
{
EncryptedBytes = RSAMain.Encrypt(bitsOfBytes, Ep, Eq, Qinv, P, Q, Size, E, N);
//Image encryptedImg = BitmapImage.Create(Imgppt.)
for (int m = 0; m < EncryptedBytes.Length; m++)
{
NewImg[m + count] = EncryptedBytes[m];
Encrypted[m] = EncryptedBytes[m];
}
count += EncryptedBytes.Length;
try
{
BitmapSource bitmap = BitmapSource.Create(2, 2, imageSource.Width, imageSource.Height, PixelFormats.Indexed8, BitmapPalettes.WebPalette, Encrypted, 2);
EncryptedImg.Source = bitmap;
// EncryptedImage = LoadImage(Encrypted);
//EncryptedImg.Source = EncryptedImage;
}
catch (Exception exp)
{
MessageBox.Show("Error in converting image\n" + exp.ToString());
}
}
catch (Exception imgexp)
{
MessageBox.Show("Encryption Failed!\nTry again with reduced file size" + imgexp);
}
if (l == (Imgbytes.Length - 1))
{
break;
}
i = i + 100;
}
BitmapSource bitmapSource = BitmapSource.Create(2, 2, imageSource.Width, imageSource.Height, PixelFormats.Indexed8, BitmapPalettes.Gray256, NewImg, 2);
EncryptedImg.Source = bitmapSource;
}
catch (Exception)
{
MessageBox.Show("Select a receiver");
}
}