public VigenereOperation CipherGivenText(VigenereOperation vigenereOperation)
{
int mode = 0;
int[] secretKeyNumberToMode = SecretKeyLetterToLetterNumbers(vigenereOperation);
foreach (var character in vigenereOperation.plainText)
{
if (char.IsLetter(Convert.ToChar(character)))
{
vigenereOperation.plainTextLetters = vigenereOperation.plainTextLetters + character;
}
}
for (int i = 0; i < vigenereOperation.plainTextLetters.Length; i++)
{
for (int k = 0; k < 29; k++)
{
if (vigenereOperation.alphabetToCipher[k + vigenereOperation.decipherAlphabetDecreaser] == vigenereOperation.plainTextLetters[i])
{
mode = (i) % (vigenereOperation.secretKey.Length);
vigenereOperation.CipherTextVigenere += vigenereOperation.alphabetToCipher[k + vigenereOperation.decipherAlphabetDecreaser + (vigenereOperation.cipherOrDecipher * (secretKeyNumberToMode[mode] + 1))];
}
}
}
return(vigenereOperation);
}
private void btnDecipher_Click(object sender, EventArgs e)
{
VigenereOperation vigenereOperation = new VigenereOperation();
CipherText cipherText = new CipherText();
vigenereOperation.plainText = tbxCipherText.Text.ToLower().ToString();
vigenereOperation.secretKey = tbxSecretKey.Text.ToLower().ToString();
vigenereOperation.cipherOrDecipher = -1;
vigenereOperation.decipherAlphabetDecreaser = 29;
vigenereOperation = cipherText.CipherGivenText(vigenereOperation);
tbxPlainText.Text = vigenereOperation.CipherTextVigenere;
}
private void btnCipher_Click(object sender, EventArgs e)
{
VigenereOperation viginereOperation = new VigenereOperation();
CipherText cipherText = new CipherText();
viginereOperation.chiperWithSpace = cbxCipherWithSpace.Checked ? true : false;
viginereOperation.plainText = tbxPlainText.Text.ToLower().ToString();
viginereOperation.secretKey = tbxSecretKey.Text.ToLower().ToString();
viginereOperation = cipherText.CipherGivenText(viginereOperation);
tbxCipherText.Text = viginereOperation.CipherTextVigenere;
tbxKasiskiCipherText.Text = tbxCipherText.Text;
}
public int[] SecretKeyLetterToLetterNumbers(VigenereOperation vigenereOperation)
{
var secretKeyCharArray = vigenereOperation.secretKey.ToCharArray();
int[] secretKeyLetterNumber = new int[secretKeyCharArray.Length];
for (int k = 0; k < secretKeyCharArray.Length; k++)
{
for (int i = 0; i < 29; i++)
{
if (secretKeyCharArray[k] == vigenereOperation.alphabetToCipher[i])
{
secretKeyLetterNumber[k] = i;
}
}
}
return(secretKeyLetterNumber);
}
