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About jQuery implementing base64 front-end encryption and decryption function

小云云
小云云Original
2017-12-29 11:48:343124browse

This article mainly introduces jQuery's implementation of base64 front-end encryption and decryption functions. It analyzes the implementation method of jquery.base64.js to implement front-end base64 encryption and decryption functions in the form of examples, and gives a comparison of operation examples of java's implementation of back-end base64 encryption and decryption. To verify the encryption effect, friends who need it can refer to it. I hope it can help everyone.

Regarding encryption, many people think of encodeURI and escape. This is useful for encrypting URLs, especially URLs with Chinese parameters.

If you just want to do encryption and decryption, similar to Java's DES, jQuery on the Internet has jquery.base64.js.

(For md5 encryption of js, you can use jquery.md5.js. If you are interested, you can find it and test it).

The following is the test: 

<html>
<head>
  <title></title>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <script language="javascript" src="jquery-1.7.1.js"></script>
  <script language="javascript" src="jquery.base64.js"></script>
</head>
<body>
<input id="path" name="path" type="hidden" value="haha"></input>
<input id="putcardno01" name="putcardno01" type="text" size="65" value=""></input>
<br>
<input onclick="subfunc();" class="btn1" value="提交加密"  type="button"></input>
<br>
加密后：<input id="putcardno02" name="putcardno02" type="text" size="65" value=""></input>
<br>
<input onclick="subfunc02();" class="btn1" value="提交解密"  type="button"></input>
<br>
<br>
<hr>
<input onclick="subfunc03();" class="btn1" value="提交N次加密"  type="button"></input>
<br>
加密后：<input id="putcardno03" name="putcardno03" type="text" size="65" value=""></input>
<br>
<input onclick="subfunc04();" class="btn1" value="提交N次解密"  type="button"></input>
<br>
<br>
<input onclick="clearrr();" class="btn1" value="清除"  type="button"></input>
<br>
<textarea id=&#39;txt&#39; cols="75" rows="19"></textarea>
</body>
<script language="javascript">
var path=document.getElementById("path").value;
function app(info){
  $("#txt").val($("#txt").val()+'\n'+info);
}
function subfunc(){
 var put1=$.trim($("#putcardno01").val());
 // var estxt=$.base64.encode(put1);
 //var estxt=$.base64.btoa(put1);
 var estxt=encodeBase64(put1);
 $("#putcardno02").val(estxt);
 app("加密后["+estxt+"]");
}
function subfunc02(){
 var put1=$.trim($("#putcardno02").val());
 //var estxt=$.base64.decode(put1);
 //var estxt=$.base64.atob(put1);
 var estxt=decodeBase64(put1);
 app("解密后["+estxt+"]");
}
//////////////////////////////////////////
var numTimes=5;
function subfunc03(){
 var put1=$.trim($("#putcardno01").val());
 // var estxt=$.base64.encode(put1);
 //var estxt=$.base64.btoa(put1);
 //estxt=$.base64.btoa(estxt);
 estxt=encodeBase64(put1,numTimes);
 $("#putcardno03").val(estxt);
 app(numTimes+"次加密后["+estxt+"]");
}
function subfunc04(){
 var put1=$.trim($("#putcardno03").val());
 //var estxt=$.base64.decode(put1);
 //var estxt=$.base64.atob(put1);
 //estxt=$.base64.atob(estxt);
 estxt=decodeBase64(put1,numTimes);
 app(numTimes+"次解密后["+estxt+"]");
}
function clearrr(){
 $("#putcardno02").val("");
 $("#putcardno03").val("");
 $("#putcardno04").val("");
 $("#txt").val("");
}
//加密方法。没有过滤首尾空格，即没有trim.
//加密可以加密N次，对应解密N次就可以获取明文
function encodeBase64(mingwen,times){
  var code="";
  var num=1;
  if(typeof times=='undefined'||times==null||times==""){
    num=1;
  }else{
    var vt=times+"";
    num=parseInt(vt);
  }
  if(typeof mingwen=='undefined'||mingwen==null||mingwen==""){
  }else{
    $.base64.utf8encode = true;
    code=mingwen;
    for(var i=0;i<num;i++){
      code=$.base64.btoa(code);
    }
  }
  return code;
}
//解密方法。没有过滤首尾空格，即没有trim
//加密可以加密N次，对应解密N次就可以获取明文
function decodeBase64(mi,times){
  var mingwen="";
  var num=1;
  if(typeof times=='undefined'||times==null||times==""){
    num=1;
  }else{
    var vt=times+"";
    num=parseInt(vt);
  }
  if(typeof mi=='undefined'||mi==null||mi==""){
  }else{
    $.base64.utf8encode = true;
    mingwen=mi;
    for(var i=0;i<num;i++){
      mingwen=$.base64.atob(mingwen);
    }
  }
  return mingwen;
}
/*
测试
输入 suolong2014version
加密后[c3VvbG9uZzIwMTR2ZXJzaW9u]
解密后[suolong2014version]
5次加密后[VjFod1QxWXlVblJUYTJoUVYwWmFhRnBYZEhOTk1WSlhWV3hPVG1KSVFscFZNalYzWVVaYU5tSkVSVDA9]
5次解密后[suolong2014version]
*/
</script>

Is the encryption and decryption in the background the same as in the front desk?

Let’s test it: 

package com.code;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
 *
 * Base64加密--解密
 *
 * @author lushuaiyin
 *
 */
public class Base64Util {
  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    String str="suolong2014version";
    System.out.println("测试明文["+str+"]");
    String basecode =Base64Util.encodeBase64(str);
    System.out.println("加密后["+basecode+"]");
    if(basecode!=null){
      String res =Base64Util.decodeBase64(basecode);
      System.out.println("解密后["+res+"]");
    }
    /////////////////////////////////////////
    System.out.println("");
    System.out.println("N次加密测试--------");
    String basecodeN=Base64Util.encodeBase64(str, 2);
    String resN=Base64Util.decodeBase64(basecodeN, 2);
    String basecodeN3=Base64Util.encodeBase64(str, 5);
    String resN3=Base64Util.decodeBase64(basecodeN3, 5);
  }
  //提供加密N次
  public static String encodeBase64(String mingwen,int times){
    int num=(times<=0)?1:times;
    String code="";
    if(mingwen==null||mingwen.equals("")){
    }else{
      code=mingwen;
      for(int i=0;i<num;i++){
        code=encodeBase64(code);
      }
      System.out.println("加密"+num+"次后["+code+"]");
    }
    return code;
  }
  //对应提供解密N次
  public static String decodeBase64(String mi,int times){
    int num=(times<=0)?1:times;
    String mingwen="";
    if(mi==null||mi.equals("")){
    }else{
      mingwen=mi;
      for(int i=0;i<num;i++){
        mingwen=decodeBase64(mingwen);
      }
      System.out.println("解密"+num+"次后["+mingwen+"]");
    }
    return mingwen;
  }
  ///////////////////////////////////////////////////////////////////
  public static String encodeBase64(String mingwen){
    String code="";
    if(mingwen==null||mingwen.equals("")){
    }else{
      BASE64Encoder encoder = new BASE64Encoder();
      try {
        code=encoder.encode(mingwen.getBytes());
      } catch (Exception e) {
        e.printStackTrace();
      }
//     System.out.println("加密后["+code+"]");
    }
    return code;
  }
  public static String decodeBase64(String mi){
    String mingwen="";
    if(mi==null||mi.equals("")){
    }else{
      BASE64Decoder decoder = new BASE64Decoder();
      try {
        byte[] by = decoder.decodeBuffer(mi);
        mingwen = new String(by);
      } catch (Exception e) {
        e.printStackTrace();
      }
//     System.out.println("解密后["+mingwen+"]");
    }
    return mingwen;
  }
}
/*
打印：
测试明文[suolong2014version]
加密后[c3VvbG9uZzIwMTR2ZXJzaW9u]
解密后[suolong2014version]
N次加密测试--------
加密2次后[YzNWdmJHOXVaekl3TVRSMlpYSnphVzl1]
解密2次后[suolong2014version]
加密5次后[VjFod1QxWXlVblJUYTJoUVYwWmFhRnBYZEhOTk1WSlhWV3hPVG1KSVFscFZNalYzWVVaYU5tSkVS
VDA9]
解密5次后[suolong2014version]
*/

From the results, jquery.base64.js encryption and decryption are the same as java’s base64 encryption and decryption.

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