private void Button_Decrypt_Click(object sender, RoutedEventArgs e)
{
var rsa = new RSAWithXMLKey();
// Converter hex string til byte array, decrypter og udskriv det decrypterede tekst
byte[] texttodecrypt = Textbox_Cipherbytes.Text.Split('-').Select(item => Convert.ToByte(item, 16)).ToArray();
Textbox_Decryptedtext.Text = rsa.DecryptfromXml(texttodecrypt);
}
private void Button_Generate_Keys_Click(object sender, RoutedEventArgs e)
{
var rsa = new RSAWithXMLKey();
// updater modulus/exponent og udskriv dem som en hexidecimal teksttreng
rsa.UpdateRsaKeys();
Textbox_Modulus.Text = BitConverter.ToString(rsa.GetModulus());
Textbox_Exponent.Text = BitConverter.ToString(rsa.GetExponent());
}
public void UpdateRsaKeys()
{
var rsa = new RSAWithXMLKey();
const string publicKeyPath = "c:\\temp\\publickey.xml";
const string privateKeyPath = "c:\\temp\\privatekey.xml";
// updater modulus/exponent
rsa.AssignNewKey(publicKeyPath, privateKeyPath);
}
public string DecryptfromXml(byte[] texttodecrypt)
{
var rsa = new RSAWithXMLKey();
const string privateKeyPath = "c:\\temp\\privatekey.xml";
// dekrypter hex-streng
var decrypted = rsa.DecryptData(privateKeyPath, texttodecrypt);
return(Encoding.Default.GetString(decrypted));
}
private void SetPrivateData()
{
var rsa = new RSAWithXMLKey();
// hent alt private data og udskriv dem som hexidecimale tekststrenge
D.Text = BitConverter.ToString(rsa.GetPrivateData_D());
DP.Text = BitConverter.ToString(rsa.GetPrivateData_Dp());
DQ.Text = BitConverter.ToString(rsa.GetPrivateData_Dq());
InverseQ.Text = BitConverter.ToString(rsa.GetPrivateData_InverseQ());
P.Text = BitConverter.ToString(rsa.GetPrivateData_P());
Q.Text = BitConverter.ToString(rsa.GetPrivateData_Q());
}
public MainWindow()
{
InitializeComponent();
//opret og indsæt public/private key (public key indsættes)
var rsa = new RSAWithXMLKey();
rsa.UpdateRsaKeys();
Textbox_Exponent.Text = BitConverter.ToString(rsa.GetExponent());
Textbox_Modulus.Text = BitConverter.ToString(rsa.GetModulus());
//indsæt private rsaParametre i tekstbokse
SetPrivateData();
}
public byte[] GetPrivateData_InverseQ()
{
var rsa = new RSAWithXMLKey();
const string privateKeyPath = "c:\\temp\\privatekey.xml";
using (var Rsa = new RSACryptoServiceProvider(2048))
{
Rsa.PersistKeyInCsp = false;
Rsa.FromXmlString(File.ReadAllText(privateKeyPath));
var parameters = Rsa.ExportParameters(true);
var InverseQ = parameters.InverseQ;
return(InverseQ);
}
}
public byte[] GetExponent()
{
var rsa = new RSAWithXMLKey();
const string publicKeyPath = "c:\\temp\\publickey.xml";
using (var Rsa = new RSACryptoServiceProvider(2048))
{
Rsa.PersistKeyInCsp = false;
// læs data fra c:\\temp\\publickey.xml
Rsa.FromXmlString(File.ReadAllText(publicKeyPath));
// expoter exponent fra provider og retuner den
var parameters = Rsa.ExportParameters(false);
var exponent = parameters.Exponent;
return(exponent);
}
}
