Here you can find the source of decrypt(byte[] encryptSource)
public static byte[] decrypt(byte[] encryptSource) throws Throwable
//package com.java2s; import javax.crypto.Cipher; public class Main { private static Cipher decryptCipher; public static byte[] decrypt(byte[] encryptSource) throws Throwable { if (encryptSource == null || encryptSource.length < 1) { return null; }//www . j a va2 s . c o m return decryptCipher.doFinal(encryptSource); } }