Exemplo n.º 1
0
        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;
            }
        }
Exemplo n.º 2
0
        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;
        }