第112款插件：jsencrypt加解密

本文实例作者：冀云
本文整理作者：杨红伟

（一）官方地址：

https://github.com/travist/jsencrypt

（二）本站代码

本站代码
https://gitee.com/hongweizhiyuan/ijquery/tree/master/signature

本站测试及调试
http://www.ijquery.cn/plugin/jsencrypt/rsa.html

原理：

（三）最简DEMO

1、HTML

<h2>第一步：获取公钥</h2>
<button id="getKey">点击获取公钥</button>
<hr/>
<h2>第二步：将本地数据加密后，在远程进行解密</h2>
<input id="dataText1" placeholder="本地数据"/>
<button id="sendButton">发送</button>
<input id="dataText2" placeholder="远程解密"/>

2、JS

(function(window) {
    'use strict';

    var rsa = function(params) {
        $.extend(this.params, params);
        this._init();
    };

    rsa.prototype = {
        params: {
            publicKey: '',
        },

        _init: function() {
            var that = this;
            that.getKeyClick();
            that.sendButton();
        },

        /**
         *  获取公钥
         */
        getKeyClick: function() {
            var that = this;

            $('#getKey').click(function() {
                $.get('testrsa.php', {act: 'get'}, function (result) {
                    result = $.parseJSON(result);
                    // 保存公钥
                    that.params.publicKey = result['publicKey'];
                });
            });
        },

        /**
         *  发送测试数据
         */
        sendButton: function() {
            var that = this;

            $('#sendButton').click(function() {
                var dataText1 = $('#dataText1').val();

                // step1:本地加密
                var encrypt = new JSEncrypt();
                encrypt.setPublicKey(that.params.publicKey);
                var encrypted = encrypt.encrypt(dataText1);
                console.log(encrypted);

                // step2:服务器上私钥解密
                $.get('testrsa.php', {act: 'data',dataText: encrypted}, function (result) {
                    result = $.parseJSON(result);
                    console.log(result['code']);
                    console.log(result['decrypted']);
                    $('#dataText2').val(result['decrypted']);
                });
            });
        }
    };
    window.rsa = rsa;
})(window);

3、PHP

<?php
require_once('test.php');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
$key = array();
$act = $_REQUEST['act'];
$rsa = new Rsa();
session_start();
if ( $act == 'get' ) {
    $key = $rsa->getKeys();
    $arr = array('code'=>200, 'publicKey'=>$key['publicKey']);
    // echo $key['publicKey'];
    echo json_encode($arr);
    $_SESSION['publickey']  = $key['publicKey'];
    $_SESSION['privateKey'] = $key['privateKey'];
} else if ( $act == 'data' ) {
    $dataText = $_REQUEST['dataText'];
    $decrypted = $rsa->decrypt($dataText, $_SESSION['privateKey']);
    $arr = array('code'=>200, 'decrypted'=>$decrypted);
    echo json_encode($arr);
}