private void btnDecrypt_Click(object sender, EventArgs e)
{
try
{
string key = txtKey.Text;
string message = txtPlain.Text;
string cryptedMessage = txtEncrypted.Text;
//if ((key == "" || message == "" || cryptedMessage == "") && (!rbtnCeasar.Checked && !rbtnXOR.Checked) || (message == "" && (rbtnCeasar.Checked || rbtnXOR.Checked)))
//{
// MessageBox.Show("Check if you have entered right all needed data!");
// return;
//}
if (rbtnKeyword.Checked)
{
string encoded = KeywordCipher.Encoder(key.ToCharArray());
string deciphered = KeywordCipher.DecipherIt(cryptedMessage, encoded);
txtDecrypted.Text = deciphered;
}
else if (rbtnCeasar.Checked)
{
int s = 26 - shift;
string deciphered = CeasarCipher.Encrypt(cryptedMessage, s);
txtDecrypted.Text = deciphered.ToString();
}
else if (rbtnVigenere.Checked)
{
string deciphered = VigenereCipher.Decryption(txtEncrypted.Text, VigenereKey);
txtDecrypted.Text = deciphered;
}
else if (rbtnXOR.Checked)
{
string ciphered = XORCipher.EncryptDecrypt(message);
string deciphered = XORCipher.EncryptDecrypt(ciphered);
txtDecrypted.Text = deciphered;
}
}
catch
{
MessageBox.Show("Check if you have entered right all needed data!");
return;
}
}
private void btnEncrypt_Click(object sender, EventArgs e)
{
if (!StringCheck(txtPlain.Text.ToCharArray()) || !StringCheck(txtKey.Text.ToCharArray()))
{
MessageBox.Show("Input text and keyword must contain only letters!");
return;
}
else
{
try
{
string message = txtPlain.Text;
string key = txtKey.Text;
if (((key == "" || message == "") && (!rbtnCeasar.Checked && !rbtnXOR.Checked)) || (message == "" && (rbtnCeasar.Checked || rbtnXOR.Checked)))
{
MessageBox.Show("Check if you have entered right all needed data!");
return;
}
if (rbtnKeyword.Checked)
{
string encoded = KeywordCipher.Encoder(key.ToCharArray());//šifrirana abeceda
string ciphered = KeywordCipher.CipherIt(message, encoded);
txtEncrypted.Text = ciphered;
}
else if (rbtnCeasar.Checked)
{
string ciphered = CeasarCipher.Encrypt(message, shift);
txtEncrypted.Text = ciphered.ToString();
}
else if (rbtnVigenere.Checked)
{
if (message.Count() >= key.Count())
{
string _key = VigenereCipher.GenerateKey(message, key);
VigenereKey = _key;
string ciphered = VigenereCipher.Encription(message, _key);
txtEncrypted.Text = ciphered;
}
else
{
MessageBox.Show("Enter longer or equal length message than key!");
return;
}
}
else if (rbtnXOR.Checked)
{
string ciphered = XORCipher.EncryptDecrypt(message);
txtEncrypted.Text = ciphered;
}
}
catch
{
MessageBox.Show("Check if you have entered right all needed data!");
return;
}
}
txtPlain.ReadOnly = true;
txtKey.ReadOnly = true;
}