private void BruteForce(int from, int to)
{
var s = new Spinner(Console.CursorLeft, Console.CursorTop);
s.Start();
for (int j = from; j < to; j++)
{
SetSeed(j);
Text = Text.ToUpper();
int i;
var cipherText = "";
for (i = 0; i < Text.Length; i++)
{
int ch = Text[i];
if (ch >= 'A' && ch <= 'Z')
{
int p = ch - 'A';
int k = (int)(26 * NextRand());
int c = (p + (26 - k)) % 26;
cipherText += (char)('A' + c);
}
else
{
cipherText += (char)ch;
}
}
var ic = ICTest.IndexOfCoincidence(cipherText);
if (ic > 0.055)
{
best.Add(j, "IC: " + ic.ToString().Substring(0, 5) + " SAMPLE: " + cipherText.Substring(0, 60));
}
}
s.Stop();
}
private void GuessKey(bool knownKey = false)
{
while (!knownKey)
{
int method = 0;
int lang = 0;
Console.WriteLine("Do you know the key ? ");
if (Console.ReadLine().ToLower().StartsWith("y"))
{
setKey();
knownKey = true;
}
else
{
Console.WriteLine("We are gonna guess the key.");
Console.WriteLine("SELECT KEY DISCOVERY METHOD: \n1. KASINSKI \n2. INDEX OF COINCIDENCE");
method = int.Parse(Console.ReadLine());
Console.WriteLine("SELECT LANGUAGE: \n1. SVK \n2. ENG");
lang = int.Parse(Console.ReadLine());
}
Console.Clear();
switch (method)
{
case 1:
KasiskiTest.GuessKeyLenght(Text);
var length = specifyKeyLength();
Key = KasiskiTest.guessKey(length, Text, lang == 1 ? Program.slovakProbs : Program.engProbs);
knownKey = true;
break;
case 2:
ICTest.GuessKeyLength(Text, 1, 50);
Key = ICTest.GuessKey(specifyKeyLength(), Text, lang == 1 ? Program.slovakProbs : Program.engProbs);
knownKey = true;
break;
default:
Console.WriteLine("You selected invalid method number! Please select again!");
break;
}
}
}
