private void button_Decrypt_Click(object sender, EventArgs e)
{
ButtonState(false);
try
{
RSAx rsax = new RSAx(richTextBox_Key.Text, int.Parse(comboBox_ModulusSize.Text));
rsax.RSAxHashAlgorithm = ha_types[comboBox_OAEP_Hash.SelectedIndex];
byte[] PT = rsax.Decrypt(Convert.FromBase64String(richTextBox_CipherText.Text), checkBox_PrivateKey.Checked, checkBox_OAEP.Checked);
richTextBox_PlainText.Text = Encoding.UTF8.GetString(PT);
}
catch (System.Exception ex)
{
MessageBox.Show("Exception while Decryption: " + ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Hand);
}
ButtonState(true);
}
private void Decrypt()
{
try
{
RSAx rsax = RSAx.CreateFromXML(Key, ModSize);
rsax.RSAxHashAlgorithm = HashAlgorithm;
byte[] raw = Convert.FromBase64String(TextCrypt.Replace("\r", "").Replace("\n", ""));
byte[] pt = rsax.Decrypt(raw, InvertPPK, UseOAEP);
TextPlain = Encoding.UTF8.GetString(pt);
}
catch (Exception ex)
{
MessageBox.Show("Exception while Decryption: " + ex.Message);
}
}
private void button_Test_Click(object sender, EventArgs e)
{
richTextBox_Test.Clear();
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(int.Parse(comboBox_ModulusSize.Text));
rsa.FromXmlString(richTextBox_Key.Text);
RSAxParameters param = RSAxUtils.GetRSAxParameters(richTextBox_Key.Text, int.Parse(comboBox_ModulusSize.Text));
RSAx rsax = new RSAx(param);
rsax.UseCRTForPublicDecryption = checkBox_UseCRT.Checked;
rsax.RSAxHashAlgorithm = ha_types[comboBox_OAEP_Hash.SelectedIndex];
int hLen = hLens[comboBox_OAEP_Hash.SelectedIndex];
int maxLength = 0;
int mod_sz = int.Parse(comboBox_ModulusSize.Text);
if (checkBox_OAEP.Checked)
{
maxLength = (mod_sz / 8) - 2 * hLen - 2;
}
else
{
maxLength = (mod_sz / 8) - 11;
}
if (maxLength >= 0)
{
Random r = new Random();
Stopwatch sw = new Stopwatch();
sw.Start();
int iterations = int.Parse(comboBox_Test_Iterations.Text);
bool error = false;
for (int i = 0; i < iterations; i++)
{
byte[] da = new byte[maxLength]; // 86 for modulus of 1024.
r.NextBytes(da);
try
{
byte[] CTX = rsax.Encrypt(da, checkBox_OAEP.Checked);
byte[] PTX = rsax.Decrypt(CTX, checkBox_OAEP.Checked);
bool ok = true;
for (int j = 0; j < da.Length; j++)
{
if (da[j] != PTX[j])
{
ok = false;
break;
}
}
richTextBox_Test.AppendText("\nIteration: " + i + ", MATCH: " + ok + ", Time: " + sw.ElapsedMilliseconds + " ms\n");
richTextBox_Test.ScrollToCaret();
//Application.DoEvents();
}
catch (System.Exception ex)
{
richTextBox_Test.Text += "\nException: " + ex.Message;
error = true;
}
}
if (!error)
{
richTextBox_Test.Text += "\n\nTest Successful\n" + iterations + " Iterations took " + sw.ElapsedMilliseconds + " ms" +
"\n\n Average Time: " + (sw.ElapsedMilliseconds / iterations) + " ms per Encryption and Decryption";
}
else
{
richTextBox_Test.Text += "\n\nTest Failed";
}
}
else
{
MessageBox.Show("Invalid Settings detected. Please check the settings in the 'Test' tab.", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Hand);
}
}