private void test()
{
string enc, dec, key, result;
enc = Ceasar.encrypt("Haz-em", 3);
dec = Ceasar.decrypt(enc, 3);
enc = Playfair.encrypt("Hazem", "playfairexample");
dec = Playfair.decrypt(enc, "playfairexample");
key = Vigenere.formulateKey("Haz-em", "bla", VigenereType.AUTO_KEY);
enc = Vigenere.encrypt("Haz-em", key);
dec = Vigenere.decrypt(enc, key);
enc = RC4.encrypt("Hazem", "ehm");
dec = RC4.decrypt(enc, "ehm");
result = MD5.getHash("Hazem AbuMostafa").ToLower();
}
private void btnDecrypt_Click(object sender, EventArgs e)
{
string ciphertext = txtCiphertext.Text,
key = txtKey.Text;
/* CATCHING ERRORS */
if (!everythingIsFine())
{
return;
}
if (ciphertext.Length == 0)
{
return;
}
/* DECRYPTING */
if (rdioCeasar.Checked)
{
txtPlaintext.Text = Ceasar.decrypt(ciphertext, int.Parse(key));
}
else if (rdioPlayfair.Checked)
{
txtPlaintext.Text = Playfair.decrypt(ciphertext, key);
}
else if (rdioVigenereRe.Checked)
{
txtKey.Text = Vigenere.formulateKey(ciphertext, key, VigenereType.REPEATING_KEY);
txtPlaintext.Text = Vigenere.decrypt(ciphertext, txtKey.Text);
}
else if (rdioVigenereAuto.Checked)
{
txtKey.Text = Vigenere.formulateKey(ciphertext, key, VigenereType.AUTO_KEY);
txtPlaintext.Text = Vigenere.decrypt(ciphertext, txtKey.Text);
}
else if (rdioRC4.Checked)
{
txtPlaintext.Text = RC4.decrypt(ciphertext, key);
}
//Second part:
else if (rdioMonoalphabetic.Checked)
{
txtPlaintext.Text = new MonoAlpha(ciphertext, key).Decrypt();
}
else if (rdioHill.Checked)
{
try { txtPlaintext.Text = new HillCipher(ciphertext, key).Decrypt(); }
catch (Exception) { showMessage("Bad key", "Can't find an inverse for the determinant of the key."
+ "\nPlease decrypt with another key."); }
}
else if (rdioRailFence.Checked)
{
txtPlaintext.Text = new RailFence(ciphertext, int.Parse(key)).Decrypt();
}
else if (rdioColumnar.Checked)
{
txtPlaintext.Text = new Colum(ciphertext, Helpers.getIntArray(key)).Decrypt();
}
//Third part:
else if (rdioDES.Checked)
{
txtPlaintext.Text = new Des(Helpers.removeDashes(key), Helpers.removeDashes(ciphertext), 1).decode();
}
else if (rdioTripleDES.Checked)
{
txtPlaintext.Text = new TripleDes(Helpers.removeDashes(ciphertext), Helpers.removeDashes(key.Split(' ')), 1).decrypt();
}
}