public void DecodeCryptogram(string key)
        {
            byte[] result = new byte[cryptogramByte.Count];
            byte[] pass = Encoding.ASCII.GetBytes(key);

            try
            {
            RC4Engine rc4 = new RC4Engine();
            KeyParameter keyParam = new KeyParameter(pass);
            rc4.Init(true, keyParam);
            rc4.ProcessBytes(cryptogramByte.ToArray(), 0, cryptogramByte.Count, result, 0);
            }
            catch (Exception e)
            {
            Console.WriteLine(e.Message);
            }

            if (CheckDecryptedText(result))
            {
            Console.Write("klucz: " + key + ": ");

            foreach (var c in result)
            {
                if (c != 0)
                {
                    Console.Write((char)c);
                }
            }
            Console.WriteLine();
            }
        }
Esempio n. 2
0
        public void ThreadRun()
        {
            int i = 0;
            byte[] clearText = new byte[kryptogram.Length];
            string czescKlucza1 = "";
            while (i <= szukaj.max)
            {
                i = szukaj.wykonane();

                if (i <= szukaj.max)
                {
                    czescKlucza1 = i.ToString("X");
                    while (czescKlucza1.Length < 8)
                    {
                        czescKlucza1 = "0" + czescKlucza1;
                    }

                    String klucz = czescKlucza1.ToLower() + czescKlucza2;
                    try
                    {
                        RC4Engine rc4 = new RC4Engine();
                        KeyParameter keyParam = new KeyParameter(System.Text.Encoding.ASCII.GetBytes(klucz));
                        rc4.Init(false, keyParam);
                        rc4.ProcessBytes(kryptogram, 0, kryptogram.Length, clearText, 0);

                    }
                    catch (Exception e)
                    {

                    }
                    bool zgodne = true;
                    for (int j = 0; j < clearText.Length; j++)
                    {
                        if (!alfabet.lista_znakow.Contains((char)clearText[j]))
                        {
                            zgodne = false;
                        }
                    }
                    //jeśli znalazl dobry klucz
                    if (zgodne)
                    {
                        Console.Write("Wiadomosc : ");
                        foreach (byte x in clearText)
                        {
                            Console.Write("{0} ", (char)x);
                        }
                        Console.WriteLine("");
                        Console.WriteLine(" klucz: {0}",klucz);
                        szukaj.ileZrobiono = szukaj.max;
                    }

                }
            }
        }
Esempio n. 3
0
 public RC4(byte[] key)
 {
     rc4 = new RC4Engine();
     rc4.Init(true, new KeyParameter(key));
 }