WPrJqM61

1using System;
2
3namespace CSHARP_app
4{
5	public class cipher
6	{
7		static char xorKey;
8    	public static String encryptDecrypt(String inputString) 
9    	{
10			char[] keys = {'K', 'P'};
11			Random rand = new Random();
12			int index = rand.Next(keys.Length);
13        	xorKey = keys[index];
14        	String outputString = "";
15        	int len = inputString.Length;
16        	for	(int i = 0; i < len; i++)
17        	{
18        	    outputString = outputString + char.ToString((char) (inputString[i] ^ xorKey));
19        	}
20        	Console.WriteLine(outputString); 
21        	return outputString; 
22    	}
23    	public void XOR() 
24    	{ 
25			Console.WriteLine("enter string to encrypt");
26       		String sampleString = Console.ReadLine();
27        	Console.WriteLine("Encrypted String:"); 
28        	String encryptedString = encryptDecrypt(sampleString);
29        	Console.WriteLine("----------\nDecrypted String:"); 
30        	encryptDecrypt(encryptedString);
31			Console.WriteLine("----------\nKey used:\n{0}", xorKey); 
32		}
33		public static string XORCipher(string data, string key)
34		{
35			int dataLen = data.Length;
36			int keyLen = key.Length;
37			char[] output = new char[dataLen];
38			for (int i = 0; i < dataLen; ++i)
39			{
40				output[i] = (char)(data[i] ^ key[i % keyLen]);
41			}
42			return new string(output);
43		}
44		public void XOR2()
45		{
46			Console.WriteLine("enter data");
47			string data = Console.ReadLine();
48			XORCipher(data, "secretkey");
49		}
50	}
51}