/*
* Get keys function, the function get as a parameter key length window. it done because we need to read the length from this form
* */
public void getKeys(KeyLengthWindow form)
{
// Generate two random numbers
// Lets use our entropy based random generator
Generator.Initialize(2);
// For 1024 bit key length, we take 512 bits for first prime and 512 for second prime
// Get same min and max
BigInteger numMin = BigInteger.Pow(2, (form.BitLength / 2) - 1);
BigInteger numMax = BigInteger.Pow(2, (form.BitLength / 2));
// Create two prime numbers
var p = new PrimeNumber();
var q = new PrimeNumber();
p.SetNumber(Generator.Random(numMin, numMin));
q.SetNumber(Generator.Random(numMin, numMax));
// Create threaded p and q searches
pThread = new Thread(p.RabinMiller);
qThread = new Thread(q.RabinMiller);
// For timeout
DateTime start = DateTime.Now;
pThread.Start();
qThread.Start();
while (pThread.IsAlive || qThread.IsAlive)
{
TimeSpan ts = DateTime.Now - start;
if (ts.TotalMilliseconds > (1000 * 60 * 5))
{
try
{
pThread.Abort();
}
// ReSharper disable EmptyGeneralCatchClause
catch (Exception)
// ReSharper restore EmptyGeneralCatchClause
{
}
try
{
qThread.Abort();
}
// ReSharper disable EmptyGeneralCatchClause
catch (Exception)
// ReSharper restore EmptyGeneralCatchClause
{
}
MessageBox.Show("Key generating error: timeout.\r\n\r\nIs your bit length too large?", "Error");
break;
}
}
// If we found numbers, we continue to create
if (p.GetFoundPrime() && q.GetFoundPrime())
{
BigInteger n = p.GetPrimeNumber() * q.GetPrimeNumber();
BigInteger euler = (p.GetPrimeNumber() - 1) * (q.GetPrimeNumber() - 1);
this.Dispatcher.Invoke((Action)(() =>
{
messageStatusBar.Text = "Generating e prime number ...";
}));
var primeNumber = new PrimeNumber();
while (true)
{
primeNumber.SetNumber(Generator.Random(2, euler - 1));
start = DateTime.Now;
eThread = new Thread(primeNumber.RabinMiller);
eThread.Start();
while (eThread.IsAlive)
{
TimeSpan ts = DateTime.Now - start;
if (ts.TotalMilliseconds > (1000 * 60 * 5))
{
MessageBox.Show("Key generating error: timeout.\r\n\r\nIs your bit length too large?", "Error");
break;
}
}
if (primeNumber.GetFoundPrime() && (BigInteger.GreatestCommonDivisor(primeNumber.GetPrimeNumber(), euler) == 1))
{
break;
}
}
if (primeNumber.GetFoundPrime())
{
this.Dispatcher.Invoke((Action)(() =>
{
messageStatusBar.Text = "Calculating key components ...";
}));
// Calculate secret exponent D as inverse number of E
BigInteger d = MathExtended.ModularLinearEquationSolver(primeNumber.GetPrimeNumber(), 1, euler);
//BigInteger d = MathExtended.ModularLinearEquationSolver(83, 1, 120);
// Displaying keys
if (d > 0)
{
// N
(keysVM as KeysVM).PublicN = n.ToString();
(keysVM as KeysVM).PrivateN = n.ToString();
// E
(keysVM as KeysVM).PublicE = primeNumber.GetPrimeNumber().ToString();
// D
(keysVM as KeysVM).PrivateD = d.ToString();
this.Dispatcher.Invoke((Action)(() =>
{
tabControl.SelectedIndex = 2;
messageStatusBar.Text = "Successfully created key pair.";
}));
}
else
{
this.Dispatcher.Invoke((Action)(() =>
{
messageStatusBar.Text = "Error: Modular equation solver fault.";
}));
MessageBox.Show(
"Error using mathematical extensions.\r\ne = " + primeNumber + "\r\neuler = " + euler + "\r\np = " +
p.GetPrimeNumber() + "\r\n" + q.GetPrimeNumber(), "Error");
}
}
}
else
{
this.Dispatcher.Invoke((Action)(() =>
{
messageStatusBar.Text = "Idle";
}));
}
this.Dispatcher.Invoke((Action)(() =>
{
this.progressBar.IsIndeterminate = false;
}));
}
