private void SaveKeys(object sender, RoutedEventArgs e)
{
try
{
// Fetch ingredients for private key
BigInteger p = BigInteger.Parse(pTextBox.Text);
BigInteger g = BigInteger.Parse(gTextBox.Text);
BigInteger x = BigInteger.Parse(xTextBox.Text);
// Generate key
SiGamalEngine.Key k = new SiGamalEngine.Key(p, g, x);
SiGamalEngine.Key.PrivateKey pri = k.GeneratePrivateKey();
SiGamalEngine.Key.PublicKey pub = k.GeneratePublicKey();
SaveFileDialog fileBrowser = new SaveFileDialog();
Nullable <bool> result = fileBrowser.ShowDialog();
if (result == true)
{
string fileName = fileBrowser.FileName;
k.saveToFile(fileName);
}
}
catch (Exception ex)
{
ShowMessageBox(ex.Message);
}
}
private void SaveKeySignButton_Click(object sender, EventArgs e)
{
// Save Key
try
{
// Fetch ingredients for private key
BigInteger p = BigInteger.Parse(pSignTextBox.Text);
BigInteger g = BigInteger.Parse(gSignTextBox.Text);
BigInteger x = BigInteger.Parse(xSignTextBox.Text);
// Generate key
Key k = new Key(p, g, x);
Key.PrivateKey pri = k.GeneratePrivateKey();
Key.PublicKey pub = k.GeneratePublicKey();
SaveFileDialog fileBrowser = new SaveFileDialog();
DialogResult result = fileBrowser.ShowDialog();
if (result == DialogResult.OK)
{
string fileName = fileBrowser.FileName;
k.saveToFile(fileName);
}
}
catch (Exception ex)
{
//ShowMessageBox("Key generation failed.");
}
}
private void GeneratePrivateKey(object sender, RoutedEventArgs e)
{
try
{
// Fetch ingredients for private key
/*BigInteger p = BigInteger.Parse(pTextBox.Text);
* BigInteger g = BigInteger.Parse(gTextBox.Text);
* BigInteger x = BigInteger.Parse(xTextBox.Text);*/
// Generate key
SiGamalEngine.Key k = SiGamalEngine.Key.GenerateRandomKey();
SiGamalEngine.Key.PrivateKey pri = k.GeneratePrivateKey();
SiGamalEngine.Key.PublicKey pub = k.GeneratePublicKey();
xTextBox.Text = pri.X.ToString();
yTextBox.Text = pub.Y.ToString();
pTextBox.Text = pub.P.ToString();
gTextBox.Text = pub.G.ToString();
}
catch (Exception ex)
{
ShowMessageBox(ex.Message);
}
}
private void RandomKeySignButton_Click(object sender, EventArgs e)
{
// Generate Random Key
key = Key.GenerateRandomKey();
Key.PrivateKey pKey = key.GeneratePrivateKey();
pSignTextBox.Text = pKey.P.ToString();
gSignTextBox.Text = pKey.G.ToString();
xSignTextBox.Text = pKey.X.ToString();
}
public static Key GenerateRandomKey()
{
Key key = null;
BigInteger p = 10, g, x;
byte[] bytes;
var rng = new RNGCryptoServiceProvider();
while (!IsMillerRabinPrime(p))
{
rng = new RNGCryptoServiceProvider();
bytes = new byte[33];
rng.GetBytes(bytes);
p = new BigInteger(bytes);
if (p < 0)
{
p *= -1;
}
}
rng = new RNGCryptoServiceProvider();
bytes = new byte[32];
rng.GetBytes(bytes);
g = new BigInteger(bytes);
if (g < 0)
{
g *= -1;
}
g %= p;
rng.GetBytes(bytes);
x = new BigInteger(bytes);
if (x < 0)
{
x *= -1;
}
x %= (p - 1);
key = new Key(p, g, x);
return key;
}
private void SignButton_Click(object sender, EventArgs e)
{
isSign = true;
key = new Key(BigInteger.Parse(pSignTextBox.Text), BigInteger.Parse(gSignTextBox.Text), BigInteger.Parse(xSignTextBox.Text));
Close();
}
private void SaveKeys(object sender, RoutedEventArgs e)
{
try
{
// Fetch ingredients for private key
BigInteger p = BigInteger.Parse(pTextBox.Text);
BigInteger g = BigInteger.Parse(gTextBox.Text);
BigInteger x = BigInteger.Parse(xTextBox.Text);
// Generate key
SiGamalEngine.Key k = new SiGamalEngine.Key(p, g, x);
SiGamalEngine.Key.PrivateKey pri = k.GeneratePrivateKey();
SiGamalEngine.Key.PublicKey pub = k.GeneratePublicKey();
SaveFileDialog fileBrowser = new SaveFileDialog();
Nullable<bool> result = fileBrowser.ShowDialog();
if (result == true)
{
string fileName = fileBrowser.FileName;
k.saveToFile(fileName);
}
}
catch (Exception ex)
{
ShowMessageBox(ex.Message);
}
}
private void SignEmail(Key.PrivateKey key)
{
Outlook.Application application = Globals.ThisAddIn.Application;
Outlook.Inspector inspector = application.ActiveInspector();
Outlook.MailItem item = (Outlook.MailItem)inspector.CurrentItem;
//Outlook.MailItem item = Outlook. Inspector.CurrentItem as Outlook.MailItem;
if (item != null)
{
string body = item.Body;
item.Body = body;
// Put Algorithm Sign Here
SHA256 sha = new SHA256();
BigInteger hash = sha.GetMessageDigestToBigInteger(body);
//System.Windows.Forms.MessageBox.Show("Hash=" + sha.GetMessageDigestToBigInteger(item.Body).ToString());
item.Body += "<sign>" + SiGamalGenerator.signature(key.P, key.G, key.X, hash) + "<sign>";
}
}
private void VerifyEmail(Key.PublicKey pubKey)
{
Outlook.Application application = Globals.ThisAddIn.Application;
Outlook.Inspector inspector = application.ActiveInspector();
Outlook.MailItem item = (Outlook.MailItem)inspector.CurrentItem;
//Outlook.MailItem item = Outlook. Inspector.CurrentItem as Outlook.MailItem;
if (item != null)
{
// Put Algorithm Verify Here
string rs = item.Body.Substring(item.Body.IndexOf("<sign>"));
rs = rs.Substring(6);
rs = rs.Substring(0, rs.IndexOf("<sign>"));
/*System.Windows.Forms.MessageBox.Show(rs);
System.Windows.Forms.MessageBox.Show(rs.Substring(0, rs.IndexOf('-')));
System.Windows.Forms.MessageBox.Show(item.Body.Substring(0, item.Body.IndexOf("\n<sign>") - 1));
*/
BigInteger r = BigInteger.Parse("0" + rs.Substring(0, rs.IndexOf('-')), System.Globalization.NumberStyles.HexNumber);
BigInteger s = BigInteger.Parse("0" + rs.Substring(rs.IndexOf('-') + 1), System.Globalization.NumberStyles.HexNumber);
SHA256 sha = new SHA256();
if (SiGamalGenerator.verification(r, s, pubKey.G, sha.GetMessageDigestToBigInteger(item.Body.Substring(0, item.Body.IndexOf("\n<sign>") - 2)), pubKey.Y, pubKey.P))
{
System.Windows.Forms.MessageBox.Show("TRUE : Message is Valid");
}
else
{
System.Windows.Forms.MessageBox.Show("FALSE ; Message was edited");
}
}
}
