private void TestKeyLengthHelp(int parCount, int lettCount, int turn, int take)
{
KeyLength keyLength = new KeyLength();
for (int i = 0; i < parCount; i++)
{
string opentext = texts.RandomParagraph(lettCount);
string key = cipher.RandomKey();
string ciphertext = cipher.Encrypt(opentext, key);
try
{
/*var crackKeys = keyLength.GetKeyLength(ciphertext).Take(take);
success[parCount * turn + i] = crackKeys.Contains(key.Length) ? 1 : 0;*/
var crackKeys = cipher.Crack(ciphertext, Vigenere.BruteForce, Form1.currentLanguage);
success[parCount * turn + i] = crackKeys.First().Length == key.Length ? 1 : 0;
}
catch (Exception)
{
}
progress();
}
lock (lockObject)
{
SetDone(turn);
if (AreThreadsDone())
afterFinish("Úspěšnost: " + ((int)(success.Average() * 100)).ToString() + "%");
}
}
/******************* KONEC *********************/
public int[] GetKey(string ciphertext)
{
KeyLength keyLength = new KeyLength();
return keyLength.GetKeyLength(ciphertext).Where(x => x < 30).Where(x => x > 4).Take(1).ToArray();
}
/// <summary>
/// Crackovací metoda, která se nejprve pokusí zjistit délku klíče
/// a následně se pokusí prolomit šifru standardně.
/// </summary>
/// <param name="ciphertext"></param>
/// <param name="language"></param>
/// <returns></returns>
private List<string> TestKeyLengthAttack(string ciphertext, Storage.Languages language)
{
KeyLength keyLength = new KeyLength();
var keysLength = keyLength.GetKeyLength(ciphertext).Take(6).ToArray();
if (keysLength.Length == 0)
keysLength = new int[MaxKeyLength - 2].Fill(x => x + 2);
return BruteForceAttack(ciphertext, language, keysLength);
}
