public string encryptGronsfeld(string _plainText, int _key)
{
string cipherText = null;
bool lowercase = false;
string cipherChar = null;
int letterNum = 0;
// use algorithm from Caesar cipher because gronsfeld is just a modified caesar
// cipher
Caesar modifiedCaesar = new Caesar();
try
{
// loop through each digit within the key
for (int x = 0; x < (_plainText.Length / Convert.ToInt32(Math.Abs(_key).ToString().Length)) + 1; x++)
{
for (int y = 0; y < Convert.ToInt32(Math.Abs(_key).ToString().Substring(Math.Abs(_key).ToString().Length - 1)); y++)
{
// pass the character and the correspoinding number from the key to
// Caesar.encryption
cipherText = modifiedCaesar.encryption(Convert.ToChar(_plainText.Substring(letterNum, 1)), lowercase, cipherChar, -Convert.ToInt32(Math.Abs(_key).ToString().Substring(y, 1)));
letterNum++;
}
}
}
catch (Exception)
{
//lazy error handling
}
return(cipherText);
}
//encryption
private void шифруванняToolStripMenuItem_Click(object sender, EventArgs e)
{
switch (number_decryption)
{
case 1:
Caesar encryption_Caesar = new Caesar();
richTextBox1.Text = encryption_Caesar.encryption(richTextBox1.Text);
break;
case 2:
Tritemius encryption_Tritemius = new Tritemius();
richTextBox1.Text = encryption_Tritemius.encryption(richTextBox1.Text, false);
break;
case 3:
gamm encryption_Gamm = new gamm();
richTextBox1.Text = encryption_Gamm.encryption(richTextBox1.Text);
//label1.Text = encryption_Gamm.str_key();
break;
case 4:
Book_code encryption_Book_code = new Book_code();
richTextBox1.Text = encryption_Book_code.encryption(richTextBox1.Text);
break;
case 5:
DES encryption_DES = new DES();
richTextBox1.Text = encryption_DES.encryption(richTextBox1.Text, cryptic.Key, cryptic.IV);
break;
case 0:
MessageBox.Show("Виберіть метод шифрування", "Error:", MessageBoxButtons.OK);
break;
}
}
//encryption
private void шифруванняToolStripMenuItem_Click(object sender, EventArgs e)
{
switch (number_decryption)
{
case 1:
Caesar encryption_Caesar = new Caesar();
richTextBox1.Text = encryption_Caesar.encryption(richTextBox1.Text);
break;
case 2:
Tritemius encryption_Tritemius = new Tritemius();
richTextBox1.Text = encryption_Tritemius.encryption(richTextBox1.Text, false);
break;
case 3:
gamm encryption_Gamm = new gamm();
richTextBox1.Text = encryption_Gamm.encryption(richTextBox1.Text);
//label1.Text = encryption_Gamm.str_key();
break;
case 4:
Book_code encryption_Book_code = new Book_code();
richTextBox1.Text = encryption_Book_code.encryption(richTextBox1.Text);
break;
case 5:
DES encryption_DES = new DES();
richTextBox1.Text = encryption_DES.encryption(richTextBox1.Text, cryptic.Key, cryptic.IV);
break;
case 6:
Backpack encryption_Backpack = new Backpack();
richTextBox1.Text = encryption_Backpack.encryption(richTextBox1.Text);
break;
case 7:
RSA encryption_RSA = new RSA();
Book_code_Form q = new Book_code_Form();
q.Get_button4_Visible(false);
q.ShowDialog();
string st_key = q.Get_Key_backpack();
richTextBox1.Text = encryption_RSA.encryption(richTextBox1.Text, st_key);
RSA = encryption_RSA.Encrypti_byte;
label1.Text = rsa.ToXmlString(false) + "\n" + rsa.ToXmlString(true);
//label1.Visible = true;
break;
case 0:
MessageBox.Show("Виберіть метод шифрування", "Error:", MessageBoxButtons.OK);
break;
}
}
