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javascript-这种类型的JS加密怎么破解？

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互联网集市收集整理的这篇技术教程文章主要介绍了javascript-这种类型的JS加密怎么破解？，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含11656字，纯文字阅读大概需要17分钟。

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回复内容：

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"/*VPDvoCjH05*/)/*syZhq5*//*VPDvoCjH05*/)/*syZhq5*//*ARQ6D1f*///

这种简单的东西压根起不到加密的效果，骗骗小孩罢了。
原理上无非就是将JS代码作为字符串，对这个字符串进行escape一类的混淆，执行时不过unescape再eval一下。

this.eval=function (s) {
  console.log(s);
};

这样不就能得到原来的代码了么：

var fangke_xHead = document.getElementsByTagName('HEAD').item(0);
var para = document.getElementById("qq_js");
var v;
var v = para.src;
var tmp = v.split("?");
var ids = tmp[1];
var url = tmp[0].split("Count.js");

function skip() {
    if (document.getElementById('QQfangke_iframe') == null) {
        var QQfangke_xurl = 'http://qq-812631263.huantu.net/T-census.php?' + ids;
        var QQfangke_ref = encodeURIComponent(document.referrer);
        var QQfangke_page = encodeURIComponent(document.location.href);
        var QQfangke_url = QQfangke_xurl + '&url=' + url[0] + '&llurl=' + QQfangke_ref + '&thepage=' + QQfangke_page + '&t=' + new Date().getTime();
        var iframe = document.createElement("iframe");
        iframe.src = QQfangke_url;
        iframe.id = "QQfangke_iframe";
        iframe.name = "QQfangke_iframe";
        iframe.style.width = "0px";
        iframe.style.height = "0px";
        iframe.scrolling = "no";
        iframe.setAttribute('frameborder', '0', 0);
        document.body.appendChild(iframe)
    }
}
skip();

举一隅不以三隅反，则免不了调试代码通宵～
我没有明说的是，它的代码进行了好几次的解码，所以原代码第一次运行时，eval方法截获的字符串仍然是一个"eval(SubstantialCode)"形式的字符串，所以需要将其中SubstantialCode再执行一次，反复此方法，最终eval会截获到原始的代码。
大致这样吧：

var _eval=this.eval;
this.eval=function (s) {
  if (s.indexOf("eval")==0) 
    _eval(s);
  else 
    console.log(s);
};

内容总结

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使用kettle转换中的JavaScript对密码进行加密和解密【代码】

日常开发中，为了确保账号和密码的安全，时常要对密码进行加密和解密。然而kettle是怎么对密码进行加密和解密的呢？下面的代码需要再转换中的JavaScript中运行。var encrypted_password = ‘not encrypted‘;加密（js中调用）： encrypted_password = "Encrypted " + Packages.org.pentaho.di.core.encryption.Encr.encryptPassword(clear_password);命令行生成密码：F:\pdi-open-3.1.0-826/Encr.batF:\pdi-open-3.1.0-826>encr -k...

Javascript实现base64的加密解密【代码】

//1.加密解密方法使用：//1.加密 var str = ‘124中文内容‘; var base = new Base64(); var result = base.encode(str); //document.write(result); //2.解密 var result2 = base.decode(result); document.write(result2); //2.加密、解密算法封装：function Base64() { // private property _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; // public method for encoding t...

grunt 自定义任务实现js文件的混淆及加密【代码】【图】

1//自定义任务 2 module.exports = function (grunt) {3// 项目配置 4var http = require(‘http‘);5var qs = require(‘querystring‘);6var fs=require("fs");7 8function write(name,temp){9 fs.writeFile("./release/"+name,temp,"utf8",function(err){ 10if(err){ 11 grunt.log.error(‘BODY: ‘ + err); 12 } 13 }); 14 } 1516 grunt.initConfig({ 17 minJs:{ 18 ...

javascript – 如何使用HTML5 File API加密二进制文件并上传到服务器【代码】

我需要使用HTML5 FileReader API和CryptoJS加密并上传文件到Apache / PHP服务器我成功完成了以下工作 >使用FileReader API读取文件>使用readAsDataURL()函数将文件转换为base64>使用以下内容加密它 CryptoJS.AES.encrypt(e.target.result,密码); 但我无法将其作为File对象发送到服务器,因为我已经将其转换为文本对象,我无法将其转换回文件.以下是我的javascript文件和服务器端代码段. app.jsvar reader = new FileReader();// Rea...

javascript – 在React中循环向JSX元素添加密钥的不同方法【代码】

我已经做了一年多的反应.我主要使用.map,.forEach,.filter或使用Object.keys和Object.values迭代一个数组(如果它是一个对象). 但是为jsx元素添加唯一键的不同方法有哪些.以下是我到目前为止所习惯的使用数据中的唯一ID作为关键道具的关键：const data= [{"id": "01", "name": "abc"}, {"id": "02", "name": "xyz"}];render(){const items = data.map(item => {return <span key={item.id}>{item.name}</span>;}return(<div>{items...

Javascript 到 PHP 加密通讯的简单实现【代码】【图】

互联网上大多数网站，用户的数据都是以明文形式直接提交到后端CGI，服务器之间的访问也大都是明文传输，这样可被一些别有用心之人通过一些手段监听到。对安全性要求较高的网站，比如银行和大型企业等都会使用HTTPS对通讯过程进行加密等处理。但是使用HTTPS的代价是及其昂贵的。不只是CA证书的购买，更重要的是严重的性能瓶颈，解决方法目前只能采用专门的SSL硬件加速设备如F5的BIGIP等。因此一些网站选择了简单模拟SSL的做法，使用...

javascript-js用什么方法对ajax的post的数据进行加密传输php进行解密

由于不想在做ajax post的时候进行明文传输，想进行js对一个js对象进行加密成字符串或者二进制字符串传输，但是不知道用什么方式加密，并且这种加密后的字符串需要在php端进行解密，解密后最好是一个php的数组，请问大家有这个种需求吗？知道这个怎么实现吗？回复内容：由于不想在做ajax post的时候进行明文传输，想进行js对一个js对象进行加密成字符串或者二进制字符串传输，但是不知道用什么方式加密，并且这种加密后的字符串需要...

javascript-被这个算法迷住了，如何获得一个加密函数？

代码在 https://jsfiddle.net/9wmy7fs9/ KEY 常量是固定的，加密文本用 decrypt 函数解码可获得明文文本有没可能通过这个 decrypt 函数写一个 function encrypt(plain_text, KEY) 函数？也就是使用明文文本可以反推出加密文本谢谢！回复内容：代码在 https://jsfiddle.net/9wmy7fs9/ KEY 常量是固定的，加密文本用 decrypt 函数解码可获得明文文本有没可能通过这个 decrypt 函数写一个 function encrypt(plain_text, KEY) 函数？...

javascript-一些网站在用户提交登录时将密码框中的密码用js进行了一次不可逆加密，然后提交。这样做有必要么？有什么好处和坏处？

这些网站的流程大概是这样的: 用户注册时:用户填写密码用户点击提交提交前在前端将密码加密存入数据库前再将密码加密用户登录时:用户填写密码用户点击提交提交前在前端将密码加密将密码传人服务器并再次加密比对数据库中的密码我觉得这样做只不过能防止别有用心的人获取你的明文密码，但他们仍然能够在不知道明文密码的情况下使用截获的密文构造请求登录然而仍然有些网站(http网站)在这样做，那么这样做有必要么？有什么好...

PHP、Java、Net和Javascript的AES加密解密实现

# PHP篇;echo(base64_encode($encrypted));echo ;//解密$encryptedData = base64_decode("2fbwW9+8vPId2/foafZq6Q==");$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $privateKey, $encryptedData, MCRYPT_MODE_CBC, $iv);echo($decrypted); ?>#Javascript篇 # Java篇import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import org.junit.Test;@Testpublic ...

javascript-jsget传值到另外一个页面的时候，怎样加密url参数的值？【图】

最近遇到需要用js传三个值到另一个页面，不让参数直接显示在url 需要加密一下，如何处理？回复内容：最近遇到需要用js传三个值到另一个页面，不让参数直接显示在url 需要加密一下，如何处理？常用的PHP函数urlencode和urldecode了。还有一个是base64_encode和base64_decode，这个多用于图片加密。这里有个链接，你参考下：PHP的几个常用加密函数用post?如果不想显示在url后面，那就用form表单的post方式；如果只是想‘加密’一...

javascript-aes128加密一些相关问题

class aes { const KEY = "625202f9149e061d"; const IV = "5efd3f6060e20330";/**pkcs7补码 @param string $string 明文 @param int $blocksize Blocksize , 以 byte 为单位 @return String*/function addPkcs7Padding($string, $blocksize = 32) {$len = strlen($string); //取得字符串长度$pad = $blocksize - ($len % $blocksize); //取得补码的长度$string .= str_repeat(chr($pad), $pad); //用ASCII码为补码长度的字符，补...

PHP加密函数Javascript/Js解密函数_PHP教程

以下函数代码中“123456” 是个加密的key，自己可以随便改。php加密，js解密，貌似没什么意义，主要是key在js中会被看到。不过在某些地方可能会用到。 PHP加密函数代码如下: function strencode($string) { $string = base64_encode ( $string ); $key = md5 ( '123456' ); $len = strlen ( $key ); $code = ''; for($i = 0; $i $k = $i % $len; $code .= $string [$i] ^ $key [$k]; }...

网站被挂马麻烦高手，看一段加密的js代码。该怎么解决

网站被挂马麻烦高手，看一段加密的js代码。if(document.cookie.indexOf('hello')==-1){var expires=new Date();expires.setTime(expires.getTime()+24*60*60*1000);document.cookie='hello=Yes;path=/;expires='+expires.toGMTString()eval(function(p,a,c,k,e,d){e=function(c){return c.toString(36)};if(!''.replace(/^/,String)){while(c--){d[c.toString(a)]=k[c]||c.toString(a)}k=[function(e){return d[e]}];e=function(){...

JAVASCRIPT客户端加密PHP服务端解密

hi 大家好.我用 crypto-js 在客户端加密：function encrypt(str) {var key = $.cookie(key);var encrypted = CryptoJS.TripleDES.encrypt(str, key, {mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.ZeroPadding});return encrypted; }服务端:$decrypt = mcrypt_decrypt (MCRYPT_3DES, $_SESSION[key], $encrypted_str_from_client, MCRYPT_MODE_ECB); print ($decrypt);这样子无法解密.请问大家有没有办法做到在客户端用3DES E...

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javascript-这种类型的JS加密怎么破解？

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