package Decode;

import java.io.UnsupportedEncodingException;

import org.apache.commons.codec.binary.Base64;

public class Test {

public static String decode(String data, String key) throws UnsupportedEncodingException {

String temp = data;

byte[] bin = Base64.decodeBase64(temp.getBytes("utf-8"));

byte[] bout = new byte[bin.length];

byte[] bkey = key.getBytes();

for (int i = 0; i < bin.length; i++) {

bout[i] = (byte) (bin[i] - bkey[(i % bkey.length)]);

}

return new String(bout, 0, bout.length, "utf-8");

}

public static String encode(String

data, String key) throws

UnsupportedEncodingException {

byte[] bin = data.getBytes("utf-8");

byte[] bout = new byte[bin.length];

byte[] bkey = key.getBytes();

for (int i = 0; i < bin.length; i++) {

bout[i] = (byte) (bin[i] + bkey[(i % bkey.length)]);

}

return new String(Base64.encodeBase64(bout));

}

public static void

main(String[] args) throws

UnsupportedEncodingException {

System.out.println(encode("aaaaaaa", "abc"));

System.out.println(decode("YmRm", "abc"));

}

}