public static void Main(String[] args)
{
//user input
Console.WriteLine("Enter some text: \n");
string user_input = Console.ReadLine();
Console.WriteLine("Input a key: \n");
int key = Convert.ToInt32(Console.ReadLine());
Console.WriteLine(key);
Console.WriteLine('\n');
//cipher
string cipherEncrypt = AutoCipher.Ciphering(user_input, key);
//output
Console.WriteLine("Encrypted text: " + cipherEncrypt);
Console.WriteLine('\n');
string decipher = AutoCipher.Decrypting(cipherEncrypt, key);
Console.WriteLine("Decyphered text: " + decipher);
Console.WriteLine('\n');
//brute force code
Brute.force(cipherEncrypt);
Brute.Analysis(cipherEncrypt);
//key encryption
string testing = Generate.AdvEncrypt(cipherEncrypt);
Console.WriteLine("encrypted data 1: " + testing);
Console.WriteLine('\n');
Console.WriteLine(Generate.AdvDecrypt(testing, key));
}
public static void force(string data)
{
List <string> output = new List <string>();
for (int i = 0; i < 26; i++)
{
string result = AutoCipher.Decrypting(data, i);
output.Add(result);
}
output.ForEach(Console.WriteLine);
}
public static string AdvDecrypt(string encryptedData, int shift)
{
var text = File.ReadAllText(path: @"path");
var key = new RSACryptoServiceProvider();
Console.WriteLine("encrypted data 2:" + encryptedData);
Console.WriteLine('\n');
key.FromXmlString(text);
Console.WriteLine("Xml string: " + text);
Console.WriteLine('\n');
byte[] cipher = Convert.FromBase64String(encryptedData);
byte[] decrypted = key.Decrypt(cipher, false);
string final = Encoding.UTF8.GetString(decrypted);
string output = AutoCipher.Decrypting(final, shift);
return(output);
}
public static void Analysis(string sign)
{
var characterCount = new Dictionary <char, int>();
foreach (var c in sign)
{
if (characterCount.ContainsKey(c))
{
characterCount[c]++;
}
else if (!Char.IsLetter(c))
{
continue;
}
else
{
characterCount[c] = 1;
}
}
char key = characterCount.FirstOrDefault(x => x.Value == characterCount.Values.Max()).Key;
Console.WriteLine("Max key: " + key);
Console.WriteLine('\n');
Console.WriteLine("Key {0}, frequent: {1}, frequent two: {2}, frequency 3: {3}", (int)key, (int)'e', (int)'t', (int)'o');
Console.WriteLine('\n');
int new_key = (int)key - (int)'e';
int other_new_key = (int)key - (int)'t';
int other_other_key = (int)key - (int)'o';
Console.WriteLine(new_key + " " + other_new_key + " " + other_other_key);
Console.WriteLine('\n');
Console.WriteLine("first test: " + AutoCipher.Decrypting(sign, new_key));
Console.WriteLine('\n');
Console.WriteLine("Second Test: " + AutoCipher.Decrypting(sign, other_new_key));
Console.WriteLine('\n');
Console.WriteLine("Third Test: " + AutoCipher.Decrypting(sign, other_other_key));
Console.WriteLine('\n');
}