XorCrypto.java

public class XorCrypto
{
	static final String KEY = "Password";
	static final String SEPARATOR = "----------------------------------------";
	static String[] tests = new String[] { "Hello" , "This is a test" , "I want to encode me then decode me :D" };
	
	public static void main ( String[] args )
	{
		for ( String test : tests )
		{
			String encoded = encrypt ( test , KEY );
			String decrypted = decrypt ( encoded , KEY );
			System.out.printf ( "%s%n%s -> %s%n%s -> %s%n" , SEPARATOR , test , encoded , encoded , decrypted );
		}
	}
	
	static String encrypt ( String plainText , String key )
	{
		String result = xor ( plainText , key );
		return MyBase64.encrypt ( result );
	}
	
	static String decrypt ( String base64 , String key )
	{
		String result = xor ( MyBase64.decrypt ( base64 ) , key );
		return result;
	}
	
	static String xor ( String input , String key )
	{
		String result = "";
		
		for ( int i = 0 ; i < input.length () ; i++ )
		{
			result += ( char ) ( input.charAt ( i ) ^ key.charAt ( i % key.length () ) );
		}
		
		return result;
	}
	
	//////////////////////////////////////////////////////////////////////////////////////////////////////////
	//                                             Output                                                   //
	//////////////////////////////////////////////////////////////////////////////////////////////////////////
	//      Hello -> GAQfHxg=                                                                               //
	//      GAQfHxg= -> Hello                                                                               //
	//      ----------------------------------------                                                        //
	//      This is a test -> BAkaAFcGAUQxQQcWBBs=                                                          //
	//      BAkaAFcGAUQxQQcWBBs= -> This is a test                                                          //
	//      ----------------------------------------                                                        //
	//      I want to encode me then decode me :D -> GUEEEhkbUhA/QRYdFAAWAXAMFlMDBxcKcAUWEBgLF0Q9BFNJMw==   //
	//      GUEEEhkbUhA/QRYdFAAWAXAMFlMDBxcKcAUWEBgLF0Q9BFNJMw== -> I want to encode me then decode me :D   //
	//////////////////////////////////////////////////////////////////////////////////////////////////////////
}