/// <summary>
/// The method decodes ciphertext with a cipher "Rail-Fence" with the specified key.
/// </summary>
/// <param name="ciphertext">Text to decrypt.</param>
/// <param name="key">Fence height.</param>
/// <returns>Decrypted text.</returns>
public string Decrypt(string ciphertext, string key)
{
int numericKey;
int.TryParse(KeyValidation.ModifyKey(key, TypesOfCiphers.RailFence), out numericKey);
if (numericKey == 0)
{
numericKey = 1;
}
int currentPos = 0;
char[] plaintext = new char[ciphertext.Length];
for (int rowNumber = 0; rowNumber < numericKey; rowNumber++)
{
for (int i = rowNumber, currentCharInStr = 0; i < ciphertext.Length;
i += GetIndexNextChar(currentCharInStr, rowNumber, numericKey), currentCharInStr++)
{
plaintext[i] = ciphertext[currentPos++];
}
}
return(new string(plaintext));
}
void KeyDownHandler(object sender, KeyRoutedEventArgs e)
{
if (KeyValidation.IsModifier(e.Key))
{
return;
}
e.Handled = !KeyValidation.IsNumeric(e.Key) && !(AllowDecimalPlaces && ((int)e.Key == 190 || e.Key == VirtualKey.Decimal));
}
public override void GetProperties(ObjectPropertyList list)
{
base.GetProperties(list);
list.Add(KeyValidation != null && KeyValidation.Any(x => x.Key == typeof(FlyWheel) && x.Active) ? 1154448 : 1154432);
list.Add(KeyValidation != null && KeyValidation.Any(x => x.Key == typeof(WireSpool) && x.Active) ? 1154449 : 1154434);
list.Add(KeyValidation != null && KeyValidation.Any(x => x.Key == typeof(PowerCore) && x.Active) ? 1154450 : 1154435);
list.Add(KeyValidation != null && KeyValidation.Any(x => x.Key == typeof(BearingAssembly) && x.Active) ? 1154451 : 1154436);
}
private void BtnDecrypt_Click(object sender, EventArgs e)
{
TypesOfCiphers typesOfCipher = TypesOfCiphers.RailFence;
if (rbRailFence.Checked)
{
typesOfCipher = TypesOfCiphers.RailFence;
}
else if (rbRotatingSquare.Checked)
{
typesOfCipher = TypesOfCiphers.RotatingSquare;
}
else if (rbVigenerCipher.Checked)
{
typesOfCipher = TypesOfCiphers.Vigenere;
}
tbKey.Text = KeyValidation.ModifyKey(tbKey.Text, typesOfCipher).ToString();
rtbSrcText.Text = TextValidation.ModifyText(rtbSrcText.Text, typesOfCipher);
if (cbUseDataInRcb.Checked)
{
rtbResText.Text = MainController.Decrypt(rtbSrcText.Text, tbKey.Text,
typesOfCipher);
}
else
{
try
{
MainController.Decrypt(tbPathToSrcFile.Text, tbPathToResFile.Text,
tbKey.Text, typesOfCipher);
}
catch (ArgumentException)
{
MessageBox.Show("Incorrect file path entered!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
catch (IOException)
{
MessageBox.Show("Incorrect file path entered!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
public KeyValidation CheckKey(string key)
{
bool ctr1 = false;
bool ctr2 = false;
bool found1 = false;
bool found2 = false;
KeyValidation type = 0;
new Thread(() =>
{
if (_oneTerm.Contains(key))
{
type = KeyValidation.ValidOneTerm;
found1 = true;
}
ctr1 = true;
}).Start();
new Thread(() =>
{
if (_fullYear.Contains(key))
{
type = KeyValidation.ValidFullYear;
found2 = true;
}
ctr2 = true;
}).Start();
while (!ctr1 || !ctr2)
{
}
if (found1 && found2)
{
return(KeyValidation.Invalid);
}
if (found1 || found2)
{
return(type);
}
return(KeyValidation.Invalid);
}
/// <summary>
/// The method encodes plaintext with a cipher "Rail-Fence" with the specified key.
/// </summary>
/// <param name="plaintext">Text to be encrypted.</param>
/// <param name="key">Fence height.</param>
/// <returns>The ciphertext.</returns>
public string Encrypt(string plaintext, string key)
{
int numericKey;
int.TryParse(KeyValidation.ModifyKey(key, TypesOfCiphers.RailFence), out numericKey);
if (numericKey == 0)
{
numericKey = 1;
}
string ciphertext = null;
for (int rowNumber = 0; rowNumber < numericKey; rowNumber++)
{
for (int i = rowNumber, currentCharInStr = 0; i < plaintext.Length;
i += GetIndexNextChar(currentCharInStr, rowNumber, numericKey), currentCharInStr++)
{
ciphertext += plaintext[i];
}
}
return(ciphertext);
}