/* Crypto-Cube How to use: - Enter a string. - The program will automatically generate a Encryption Key and encrypt + decrypt the string accordingly by rotating the virtual cubes. -You can manually change the Encryption Key by changing the "key" value at line 38. */ using System; using System.Collections.Generic; namespace CryptoCube { struct Coordinates { public int c, x, y, z; public Coordinates(int c, int x, int y, int z) { this.c = c; this.x = x; this.y = y; this.z = z; } } class CryptoCube { static Dictionary _pair = new Dictionary(); static bool _isEncrypted = false; static void Main(String[] args) { string input = Console.ReadLine(); Console.WriteLine("\n=> Original text: " + input); Console.WriteLine("\n=> Allocating cube(s)..."); allocatePoint(SplitByLength(input)); DisplayInfo(); Console.WriteLine("\n=> Generating key..."); string key = KeyGenerator.GenerateEncryptionKey(_pair.Count % 8 == 0 ? _pair.Count / 8 : _pair.Count / 8 + 1); Console.WriteLine(key); Encrypt(key); Console.Write("\n=> Text after encryption: "); DisplayText(); Console.WriteLine("\n=> New coordinates after encryption."); DisplayInfo(); Console.WriteLine("\n=> Decrypting using key: " + key); Encrypt(key); Console.Write("\n=> Text after decryption: "); DisplayText(); Console.WriteLine(); DisplayInfo(); } static void allocatePoint(List input) { for (int i = 0; i < input.Count; i++) { _pair.Add(new Coordinates(i + 1, 0, 0, 0), input[i][0]); _pair.Add(new Coordinates(i + 1, 0, 1, 0), input[i][1]); _pair.Add(new Coordinates(i + 1, 1, 1, 0), input[i][2]); _pair.Add(new Coordinates(i + 1, 1, 0, 0), input[i][3]); _pair.Add(new Coordinates(i + 1, 0, 0, 1), input[i][4]); _pair.Add(new Coordinates(i + 1, 0, 1, 1), input[i][5]); _pair.Add(new Coordinates(i + 1, 1, 1, 1), input[i][6]); _pair.Add(new Coordinates(i + 1, 1, 0, 1), input[i][7]); } } static List SplitByLength(string word) { List wordList = new List(); for (int i = 0; i < word.Length; i += 8) { if ((i + 8) < word.Length) wordList.Add(word.Substring(i, 8)); else wordList.Add(word.Substring(i) + new String('-', 8 - word.Substring(i).Length)); } return wordList; } static void Encrypt(string key) { string[] Rotations = key.Split(','); foreach (string rotate in Rotations) { int i, lastIndex; string[] direction = rotate.Split(':'); if (_isEncrypted) { Array.Reverse(direction); i = 0; lastIndex = direction.Length - 1; } else { i = 1; lastIndex = direction.Length; } for (; i < lastIndex; i++) { switch (direction[i]) { case "U": if (_isEncrypted) RotateCube.Down(ref _pair, int.Parse(direction[direction.Length - 1])); else RotateCube.Up(ref _pair, int.Parse(direction[0])); break; case "R": if (_isEncrypted) RotateCube.Left(ref _pair, int.Parse(direction[direction.Length - 1])); else RotateCube.Right(ref _pair, int.Parse(direction[0])); break; case "D": if (_isEncrypted) RotateCube.Up(ref _pair, int.Parse(direction[direction.Length - 1])); else RotateCube.Down(ref _pair, int.Parse(direction[0])); break; case "L": if (_isEncrypted) RotateCube.Right(ref _pair, int.Parse(direction[direction.Length - 1])); else RotateCube.Left(ref _pair, int.Parse(direction[0])); break; } } } _isEncrypted = true; } static void DisplayInfo() { foreach (KeyValuePair v in _pair) Console.WriteLine("Cube: " + v.Key.c + " | Coordinates: (" + v.Key.x + "," + v.Key.y + "," + v.Key.z + ") | Letter: " + v.Value); } static void DisplayText() { foreach (KeyValuePair c in _pair) Console.Write(c.Value); Console.WriteLine(); } } static class RotateCube { public static void Up(ref Dictionary cube, int cubeId) { char t = cube[new Coordinates(cubeId, 0, 0, 0)]; cube[new Coordinates(cubeId, 0, 0, 0)] = cube[new Coordinates(cubeId, 0, 0, 1)]; cube[new Coordinates(cubeId, 0, 0, 1)] = cube[new Coordinates(cubeId, 0, 1, 1)]; cube[new Coordinates(cubeId, 0, 1, 1)] = cube[new Coordinates(cubeId, 0, 1, 0)]; cube[new Coordinates(cubeId, 0, 1, 0)] = t; t = cube[new Coordinates(cubeId, 1, 0, 0)]; cube[new Coordinates(cubeId, 1, 0, 0)] = cube[new Coordinates(cubeId, 1, 0, 1)]; cube[new Coordinates(cubeId, 1, 0, 1)] = cube[new Coordinates(cubeId, 1, 1, 1)]; cube[new Coordinates(cubeId, 1, 1, 1)] = cube[new Coordinates(cubeId, 1, 1, 0)]; cube[new Coordinates(cubeId, 1, 1, 0)] = t; } public static void Right(ref Dictionary cube, int cubeId) { char t = cube[new Coordinates(cubeId, 0, 0, 0)]; cube[new Coordinates(cubeId, 0, 0, 0)] = cube[new Coordinates(cubeId, 0, 0, 1)]; cube[new Coordinates(cubeId, 0, 0, 1)] = cube[new Coordinates(cubeId, 1, 0, 1)]; cube[new Coordinates(cubeId, 1, 0, 1)] = cube[new Coordinates(cubeId, 1, 0, 0)]; cube[new Coordinates(cubeId, 1, 0, 0)] = t; t = cube[new Coordinates(cubeId, 0, 1, 0)]; cube[new Coordinates(cubeId, 0, 1, 0)] = cube[new Coordinates(cubeId, 0, 1, 1)]; cube[new Coordinates(cubeId, 0, 1, 1)] = cube[new Coordinates(cubeId, 1, 1, 1)]; cube[new Coordinates(cubeId, 1, 1, 1)] = cube[new Coordinates(cubeId, 1, 1, 0)]; cube[new Coordinates(cubeId, 1, 1, 0)] = t; } public static void Down(ref Dictionary cube, int cubeId) { char t = cube[new Coordinates(cubeId, 0, 0, 0)]; cube[new Coordinates(cubeId, 0, 0, 0)] = cube[new Coordinates(cubeId, 0, 1, 0)]; cube[new Coordinates(cubeId, 0, 1, 0)] = cube[new Coordinates(cubeId, 0, 1, 1)]; cube[new Coordinates(cubeId, 0, 1, 1)] = cube[new Coordinates(cubeId, 0, 0, 1)]; cube[new Coordinates(cubeId, 0, 0, 1)] = t; t = cube[new Coordinates(cubeId, 1, 0, 0)]; cube[new Coordinates(cubeId, 1, 0, 0)] = cube[new Coordinates(cubeId, 1, 1, 0)]; cube[new Coordinates(cubeId, 1, 1, 0)] = cube[new Coordinates(cubeId, 1, 1, 1)]; cube[new Coordinates(cubeId, 1, 1, 1)] = cube[new Coordinates(cubeId, 1, 0, 1)]; cube[new Coordinates(cubeId, 1, 0, 1)] = t; } public static void Left(ref Dictionary cube, int cubeId) { char t = cube[new Coordinates(cubeId, 0, 0, 0)]; cube[new Coordinates(cubeId, 0, 0, 0)] = cube[new Coordinates(cubeId, 1, 0, 0)]; cube[new Coordinates(cubeId, 1, 0, 0)] = cube[new Coordinates(cubeId, 1, 0, 1)]; cube[new Coordinates(cubeId, 1, 0, 1)] = cube[new Coordinates(cubeId, 0, 0, 1)]; cube[new Coordinates(cubeId, 0, 0, 1)] = t; t = cube[new Coordinates(cubeId, 0, 1, 0)]; cube[new Coordinates(cubeId, 0, 1, 0)] = cube[new Coordinates(cubeId, 1, 1, 0)]; cube[new Coordinates(cubeId, 1, 1, 0)] = cube[new Coordinates(cubeId, 1, 1, 1)]; cube[new Coordinates(cubeId, 1, 1, 1)] = cube[new Coordinates(cubeId, 0, 1, 1)]; cube[new Coordinates(cubeId, 0, 1, 1)] = t; } } static class KeyGenerator { public static string GenerateEncryptionKey(int totalCubes) { Dictionary map = new Dictionary() { { 0, 'U' }, { 1, 'R' }, { 2, 'D' }, { 3, 'L' } }; Random rand = new Random(); string encryptionKey = ""; for (int i = 0; i < totalCubes; i++) { encryptionKey += (i + 1).ToString(); int rotations = rand.Next(1, 7); for (int j = 0; j <= rotations; j++) encryptionKey += ":" + map[rand.Next(0, 4)]; if (i != totalCubes - 1) encryptionKey += ','; } return encryptionKey; } } }