private CrackResult[] FixVigenere(CrackResult[] results)
{
double min = 0.3;
string vigenereKey = string.Empty;
if (results.Length > 0 && results.First().cipher is Vigenere)
{
vigenereKey = results.First().key;
double distinct = (double)vigenereKey.ToCharArray().Distinct().Count();
double origin = (double)vigenereKey.Length;
double poss = distinct / origin;
if (poss < min)
{
return results.Where(x => x.cipher is Caesar).ToArray();
}
}
return results;
}
private static List<CrackResult> GetCrackResults(string ciphertext, Cipher[] ciphers, Storage.Languages language)
{
List<CrackResult> results = new List<CrackResult>();
foreach (var cipher in ciphers)
{
try
{
var keys = cipher.Crack(ciphertext, 0, language);
if (keys.Count > 0)
{
var result = new CrackResult();
result.key = keys[0];
result.opentext = cipher.Decrypt(ciphertext, result.key);
result.cipher = cipher;
results.Add(result);
}
}
catch (Exceptions.MatchNotFound)
{ }
}
return results;
}
private void GetCrackResults(string ciphertext, Cipher[] ciphers, Storage.Languages language, Action<CrackResult[]> afterCrack)
{
int threadsCount = ciphers.Length;
CrackResult[] results = new CrackResult[threadsCount];
bool[] syncArray = new bool[threadsCount].Fill(false);
object progressLockObject = new object();
object endTestLockObject = new object();
threadsCount.Times(i =>
{
Thread thread = new Thread(() =>
{
try
{
var currentCipher = ciphers[i];
var keys = currentCipher.Crack(ciphertext, 0, language);
if (keys.Count > 0)
{
var crackResult = new CrackResult();
crackResult.key = keys[0];
crackResult.opentext = currentCipher.Decrypt(ciphertext, crackResult.key);
crackResult.cipher = currentCipher;
results[i] = crackResult;
}
else
{
throw new Exceptions.MatchNotFound();
}
lock (progressLockObject)
{
progress();
}
}
catch (Exceptions.MatchNotFound)
{
lock (progressLockObject)
{
progress();
}
}
lock (endTestLockObject)
{
syncArray[i] = true;
if (syncArray.All(x => x))
{
afterCrack(results);
}
}
});
thread.Priority = ThreadPriority.Lowest;
thread.IsBackground = true;
addThread(thread);
thread.Start();
});
}
private void finish(CrackResult crackResult)
{
if (FinishFunction != null)
FinishFunction(crackResult);
}
private void SetCrackResult(CrackResult result, string ciphertext)
{
SetCrackResult(result.key, result.cipher.Decrypt(ciphertext, result.key), Storage.GetCipherName((Storage.Ciphers)Enum.Parse(typeof(Storage.Ciphers), result.cipher.ToString())));
}
