Cryptojs v3.1.2 Implementation of MD5 data encryption instance

Cryptojs V3.1.2:https://code.google.com/p/crypto-js/downloads/list or http://www.oschina.net/p/crypto-js/

1. Project structure

2, the project needs to import the jar package

This project is struts2, so you need to import the Struts2 jar package. Import the following package into the project's Webroot/web-inf/lib directory

3, the project needs to import the JS file

After downloading Cryptojs v3.1.2, unzip, unzip the folder after the root directory has two directories, wherein core-min.js in the components directory, md5.js in the Rollups directory. Find these two JS files, and then create a new JS folder in the Webroot root directory of the project, and put the two JS files in the Webroot/js directory

4, the source code of each document (1) in the SRC root directory new package com.md5.action, under the package to establish Encryptaction.java

Encryptaction.java

Package Com.md5.action;import Com.opensymphony.xwork2.actioncontext;public class Encryptaction {private String Username;private string Password;public string GetUserName () {return userName;} public void Setusername (String userName) {this.username = UserName;} Public String GetPassword () {return password;} public void SetPassword (String password) {this.password = password;} Public String  EncryptByMd5 () {Actioncontext context = Actioncontext.getcontext (); Context.put ("UserName", This.username) context.put ("password", This.password); return "Success";}}

(2) Create a new XML file in the SRC root directory struts.xml

Struts.xml

<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE struts Public "-//apache software foundation//dtd struts Configuration 2.1//en" "http://struts.apache.org/dtds/ Struts-2.1.dtd "><struts> <!--Configure constants in Struts 2 app--  <constant name=" struts.i18n.encoding "value = "UTF-8"/>   <package name= "MD5" extends= "Struts-default" > <action name= "md5action" class= " Com.md5.action.EncryptAction "method=" EncryptByMd5 "><result name=" Success ">/success.jsp</result> </action></package></struts>    

(3) Modify the Web. xml file

Xml

<?xml version= "1.0" encoding= "UTF-8"? ><web-app version= "3.0" xmlns= "Http://java.sun.com/xml/ns/javaee" Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee http ://java.sun.com/xml/ns/javaee/web-app_3_0.xsd ">  <!--set Struts 2 Filter--  <filter>      < Filter-name>struts 2</filter-name>      <filter-class> Org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter</filter-class>  </filter>  <filter-mapping>      <filter-name>struts 2</filter-name>      <url-pattern>/*</ url-pattern>  </filter-mapping>      <!--settings Welcome page--  <welcome-file-list>    < welcome-file>index.jsp</welcome-file>  </welcome-file-list>    <!--session timeout definition in minutes-- >  <session-config><session-timeout>30</session-timeout>  </session-config>  </web-app>

(4) index.jsp, md5demo.jsp and success.jsp are established under the Webroot root directory.

index.jsp

<%@ page language= "java" import= "java.util.*" pageencoding= "UTF-8"%><%string path = Request.getcontextpath () ; String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
md5demo.jsp
<%@ page language= "java" import= "java.util.*" pageencoding= "UTF-8"%><%string path = Request.getcontextpath () ; String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >success.jsp
<%@ page language= "java" import= "java.util.*" pageencoding= "UTF-8"%><%@ taglib prefix= "s" uri= "/struts-tags" %><%string path = Request.getcontextpath (); String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >

after completing all the above steps, publish the project to the server, use the browser to access the md5demo.jsp, enter the user name, password, submit, you will see the password encrypted data
Before submission (password entered is: 123456789)


After submission
That is, the 123456789 through the MD5 algorithm is added to the secret, it becomes the 25f9e794323b453885f5181f1b624d0b

Description: This example only demonstrates the simple use of CRYPTOJS v3.1.2 to implement MD5 data encryption. In the actual project, for example, when the user registers, in the Password input box uses above the MD5 algorithm, gives the password 
Encryption, through the form submitted to the background, after the background processing, the contents of the form into the database (password is the property of the form, plus a secret password also stored in the database). After the user has registered, at the time of login
Wait, the user input password, this time, only need to give the user input of the password is also used above the encryption algorithm, and then submitted to the background with the form, the background is holding the form has been added a secret user input password, with the number
The database has been added to the password matching authentication is OK. Instead of decrypting the password in the database, and then matching it with a user-submitted password that is not encrypted. because the MD5 algorithm is irreversible, the solution
Dense after the data may not be the original data, but other data, and a certain data through the MD5 algorithm encrypted ciphertext is unique. Therefore, it is appropriate to adopt the above method. 


Cryptojs v3.1.2 Implementation of MD5 data encryption instance