Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package Clases; import java.util.Random; import org.apache.commons.codec.digest.DigestUtils; /** * * @author miguel */ public class Encriptar { public static String getCadenaAleatoria(int longitud) {//microtime String cadenaAleatoria = ""; long milis = new java.util.GregorianCalendar().getTimeInMillis(); Random r = new Random(milis); int i = 0; while (i < longitud) { char c = (char) r.nextInt(255); if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c == '$') || (c == '_')) { cadenaAleatoria += c; i++; } } return cadenaAleatoria; } public static String encriptarTokenMD5(String name) { String cadena_encriptada = DigestUtils.md5Hex(name); return cadena_encriptada; } public static boolean validarTokenMD5(String cadenaAleatoria, String cadena_encriptada) { if (encriptarTokenMD5(cadenaAleatoria).equals(cadena_encriptada)) return true; return false; } }