private static string Encrypt(string text, int key)
{
string final = string.Empty;
char[] separators = { '&', '!', '#', '?', '%' };
char sep = separators[SecureRandoms.Number(separators.Length)];
foreach (char c in text.ToCharArray())
{
int asciiCode = c;
string keyy = (key * asciiCode).ToString().ToHexString() + sep;
final += keyy
.Replace("0", "^")
.Replace("1", ":")
.Replace("2", "$")
.Replace("3", "*")
.Replace("4", "'")
.Replace("5", "(")
.Replace("6", "-")
.Replace("7", "_")
.Replace("8", ")")
.Replace("9", "=");
}
return(final.Remove(final.Length - 1).Reverse());
}
static void Main(string[] args)
{
Console.InputEncoding = Encoding.UTF8;
Console.OutputEncoding = Encoding.UTF8;
Console.SetIn(new StreamReader(Console.OpenStandardInput(8192)));
Console.Write("What do you want to do? (e encrypt/d decrypt) : ");
string choice = Console.ReadLine();
if (choice == "e" || choice == "encrypt")
{
Console.Write("Input string to encrypt : ");
string text = Console.ReadLine();
Console.Write("Encryption key (leave empty for random) : ");
string read = Console.ReadLine();
int keyy;
if (string.IsNullOrEmpty(read) || string.IsNullOrWhiteSpace(read))
{
read = SecureRandoms.String(SecureRandoms.Number(35, 20));
Console.WriteLine($"[RANDOM KEY] {read}");
}
keyy = read.GetHashCode();
keyy = int.Parse(keyy.ToString().Replace("-", string.Empty));
int key = 0;
foreach (char c in keyy.ToString().ToCharArray())
{
key += c;
}
key *= key;
Console.WriteLine($"[UNIQUE ID] {key}");
string encrypted = Encrypt(text, key);
Console.WriteLine($"[ENCRYPTED] {encrypted}");
Console.WriteLine($"[DECRYPTED] {Decrypt(encrypted, key)}");
Console.WriteLine("Key / encrypted format saved to file.");
File.WriteAllText("formatted.txt", $"{read} / {encrypted}");
}
else
{
tryagain : Console.Write("Drag & drop the formatted file : ");
string read = Console.ReadLine().Replace("\"", string.Empty);
if (File.Exists(read))
{
string readtext = File.ReadAllText(read);
string[] array = readtext.Replace(" ", string.Empty).Split('/');
int keyy = array[0].GetHashCode();
keyy = int.Parse(keyy.ToString().Replace("-", string.Empty));
int key = 0;
foreach (char c in keyy.ToString().ToCharArray())
{
key += c;
}
key *= key;
string text = array[1];
try
{
Console.WriteLine($"[DECRYPTED] {Decrypt(text, key)}");
}
catch (Exception ex) { Console.WriteLine($"[DECRYPTED] Error : {ex.Message}{ex.StackTrace}"); goto tryagain; }
}
else
{
goto tryagain;
}
}
Console.WriteLine("\nPress any key to exit the program...");
Console.ReadKey();
}