private async void computeHashBtn_Click(object sender, EventArgs e)
{
byte[] data = Encoding.ASCII.GetBytes(this.tigerInputTxtBox.Text);
EncryptTextMessage msg = new EncryptTextMessage()
{
Data = data,
Algorithm = AlgorithmType.TigerHash
};
byte[] response = await Task.Run(() => Crypto.EncryptText(msg));
//byte[] response = Crypto.EncryptText(msg);
StringBuilder hex = new StringBuilder(response.Length * 2);
foreach (byte b in response)
{
hex.AppendFormat("{0:x2}", b);
}
if (response != null)
{
this.hashValueTxtBox.Text = hex.ToString();
}
}
private async void rsaDecryptTxtBtn_Click(object sender, EventArgs e)
{
if ((PTxtBox.Text != "") && (QTxtBox.Text != "") && (ETxtBox.Text != "") && (rsaCryptedTxtBox.Text != ""))
{
RSA rsa = new RSA();
rsa.P = BigInteger.Parse(PTxtBox.Text);
rsa.Q = BigInteger.Parse(QTxtBox.Text);
rsa.E = BigInteger.Parse(ETxtBox.Text);
//BigInteger data = BigInteger.Parse(rsaCryptedTxtBox.Text);
BigInteger data = new BigInteger(Convert.FromBase64String(rsaCryptedTxtBox.Text));
if (!rsa.MillerRabinTest(rsa.P, 10))
{
MessageBox.Show("P mora biti prost broj. Izgenerisan je prost broj koji je najblizi unetom broju.");
rsa.P = rsa.GenerateNearestPrime(rsa.P);
PTxtBox.Text = rsa.P.ToString();
}
if (!rsa.MillerRabinTest(rsa.Q, 10))
{
MessageBox.Show("Q mora biti prost broj. Izgenerisan je prost broj koji je najblizi unetom broju.");
rsa.Q = rsa.GenerateNearestPrime(rsa.Q);
QTxtBox.Text = rsa.Q.ToString();
}
rsa.CalculateN();
//if (data > rsa.N)
//{
// MessageBox.Show("P i Q moraju biti veci brojevi kako bi N bilo vece ili jednako od podatka.");
// return;
//}
rsa.CalculatePhi();
if (BigInteger.GreatestCommonDivisor(rsa.Phi, rsa.E) != 1)
{
MessageBox.Show("E mora biti uzajamno prosto sa Phi. Izgenerisano je najblize E koje ispunjava uslov.");
rsa.GeneratePublicKey(); // trazi se prvo E koje ispunjava uslov
ETxtBox.Text = rsa.E.ToString();
}
EncryptTextMessage msg = new EncryptTextMessage()
{
Data = data.ToByteArray(),
P = rsa.P.ToByteArray(),
Q = rsa.Q.ToByteArray(),
Key = rsa.E.ToByteArray(),
Algorithm = AlgorithmType.RSA
};
byte[] response = await Crypto.DecryptText(msg);
if (response != null)
{
rsaDecryptedTxtBox.Text = Encoding.ASCII.GetString(response);
//rsaDecryptedTxtBox.Text = new BigInteger(response).ToString();
}
}
else
{
MessageBox.Show("Potrebna polja nisu popunjena.");
}
}
// Dekriptovanje teksta
public static async Task <byte[]> DecryptText(EncryptTextMessage msg)
{
byte[] decryptedText = null;
try
{
decryptedText = await Task.Run(() => ServiceDriver.Instance.DecryptText(msg));
}
catch (Exception e)
{
MessageBox.Show("Doslo je do greske pri dekriptovanju teksta.");
}
return(decryptedText);
}
/// <summary>
/// Dekriptovanje teksta A52
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void A52decryptBtn_Click(object sender, EventArgs e)
{
if (((this.A52CtrModeCbox.Checked != true) && (this.A52KeyTxtBox.Text != "") && (this.A52cryptedTxt.Text != "") && (this.f22TxtBox.Text != "")) ||
((this.A52CtrModeCbox.Checked == true) && (this.A52KeyTxtBox.Text != "") && (this.A52cryptedTxt.Text != "") && (this.A52IVtxtBox.Text != "") && (this.f22TxtBox.Text != "")))
{
byte[] data = Convert.FromBase64String(this.A52cryptedTxt.Text);
byte[] key = Encoding.ASCII.GetBytes(this.A52KeyTxtBox.Text);
string f = this.f22TxtBox.Text;
EncryptTextMessage msg = new EncryptTextMessage()
{
Data = data,
Key = key,
FKeyA52 = f
};
if (this.A52CtrModeCbox.Checked == true)
{
msg.Algorithm = AlgorithmType.A52CTR;
byte[] iv = Encoding.ASCII.GetBytes(this.A52IVtxtBox.Text);
msg.IV = iv;
}
else
{
msg.Algorithm = AlgorithmType.A52;
}
byte[] response = await Task.Run(() => Crypto.DecryptText(msg));
if (response != null)
{
this.A52decryptedTxt.Text = Encoding.ASCII.GetString(response);
}
}
else
{
MessageBox.Show("Polja nisu popunjena.");
}
}
private async void rc4CryptTxtBtn_Click(object sender, EventArgs e)
{
if (((this.rc4CtrCbx.Checked != true) && (this.rc4KeyTxtBox.Text != "") && (this.rc4InputTxtBox.Text != "")) ||
((this.rc4CtrCbx.Checked == true) && (this.rc4KeyTxtBox.Text != "") && (this.rc4InputTxtBox.Text != "") && (this.rc4IVTxtBox.Text != "")))
{
byte[] data = Encoding.ASCII.GetBytes(this.rc4InputTxtBox.Text);
byte[] key = Encoding.ASCII.GetBytes(this.rc4KeyTxtBox.Text);
EncryptTextMessage msg = new EncryptTextMessage()
{
Data = data,
Key = key,
};
if (this.rc4CtrCbx.Checked == true)
{
msg.Algorithm = AlgorithmType.RC4CTR;
byte[] iv = Encoding.ASCII.GetBytes(this.rc4IVTxtBox.Text);
msg.IV = iv;
}
else
{
msg.Algorithm = AlgorithmType.RC4;
}
byte[] response = await Task.Run(() => Crypto.EncryptText(msg));
if (response != null)
{
this.rc4CryptedTxtBox.Text = Convert.ToBase64String(response);
}
}
else
{
MessageBox.Show("Polja nisu popunjena.");
}
}
