public Decipher()
{
this.N = GenerateMonocyclicTransposition.ReadParametrN();
this.Key = ReadKey();
if (this.Key == null || this.Key.Length != N)
{
Console.WriteLine("Error: key.txt");
return;
}
String cryptogram = ReadCryptogram();
if (cryptogram == null)
{
Console.WriteLine("Error: cryptogram.txt");
return;
}
StringBuilder decipher = new StringBuilder();
Random random = new Random();
int position = 0;
while (position < cryptogram.Length)
{
String partCryptogram = cryptogram.Substring(position, this.N);
char[] temp = new char[this.N];
for (int i = 0; i < this.N; i++)
{
temp[i] = partCryptogram[Key[i] - 1];
}
decipher.Append(temp);
position += this.N;
}
PrintDecipher(decipher.ToString());
}
public static void Main(string[] args)
{
Console.WriteLine("1 - Сгенерировать случайную моноциклическую перестановку\n" +
"2 - Зашифровать текст шифром простой перестановки\n" +
"3 - Расшифровать текст при помощи известного ключа\n" +
"4 - Выполнить тест Казиски\n" +
"5 - По полученной длине ключа из теста Казиски, восстановить сообщение");
int choice = int.Parse(Console.ReadLine());
switch (choice)
{
case 1:
{
GenerateMonocyclicTransposition transposition = new GenerateMonocyclicTransposition();
break;
}
case 2:
{
Cryptogram cryptogram = new Cryptogram();
break;
}
case 4:
{
Kasiski kasiski1 = new Kasiski(7);
Kasiski kasiski2 = new Kasiski(5);
Kasiski kasiski3 = new Kasiski(6);
int temp = GCD(kasiski1.answer, kasiski2.answer);
int result = GCD(temp, kasiski3.answer);
File.WriteAllText("anticipatedN.txt", result.ToString());
break;
}
case 3:
{
Decipher decipher = new Decipher();
break;
}
case 5:
{
GenerateAllMonocyclicTransposition generateAllMonocyclicTransposition = new GenerateAllMonocyclicTransposition();
break;
}
}
}
public Cryptogram()
{
this.N = GenerateMonocyclicTransposition.ReadParametrN();
this.Key = ReadKey();
if (this.Key == null || this.Key.Length != N)
{
Console.WriteLine("Error: key.txt");
return;
}
String message = ReadMessage();
if (message == null)
{
Console.WriteLine("Error: message.txt");
return;
}
StringBuilder cryptograma = new StringBuilder();
Random random = new Random();
int position = 0;
for (int i = 0; i <= message.Length % this.N; i++)
{
//message = message + (message[new Random().Next(0, message.Length)]);
message = message + " ";
}
while (position < message.Length)
{
String partDecipher = message.Substring(position, this.N);
char[] temp = new char[this.N];
for (int i = 0; i < this.N; i++)
{
temp[Key[i] - 1] = partDecipher[i];
}
cryptograma.Append(temp);
position += this.N;
}
PrintCryptogram(cryptograma.ToString());
}