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<!DOCTYPE html><html lang="zh-CN" data-theme="light"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"><title>Gruge's Blog</title><meta name="author" content="Gruge"><meta name="copyright" content="Gruge"><meta name="format-detection" content="telephone=no"><meta name="theme-color" content="#ffffff"><meta property="og:type" content="website">
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})(window)</script><link rel="stylesheet" href="/css/modify.css"><meta name="generator" content="Hexo 5.4.1"></head><body><div id="loading-box"><div class="loading-left-bg"></div><div class="loading-right-bg"></div><div class="spinner-box"><div class="configure-border-1"><div class="configure-core"></div></div><div class="configure-border-2"><div class="configure-core"></div></div><div class="loading-word">加载中...</div></div></div><div id="web_bg"></div><div id="sidebar"><div id="menu-mask"></div><div id="sidebar-menus"><div class="avatar-img is-center"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/463b631c6a0f63ec.jpg" onerror="onerror=null;src='/img/friend_404.gif'" alt="avatar"></div><div class="site-data is-center"><div class="data-item"><a href="/archives/"><div class="headline">文章</div><div class="length-num">18</div></a></div><div class="data-item"><a href="/tags/"><div class="headline">标签</div><div class="length-num">42</div></a></div><div class="data-item"><a href="/categories/"><div class="headline">分类</div><div class="length-num">7</div></a></div></div><hr><div class="menus_items"><div class="menus_item"><a class="site-page" href="/"><i class="fa-fw fa fa-home"></i><span> 首页</span></a></div><div class="menus_item"><a class="site-page" href="/archives/"><i class="fa-fw fa fa-archive"></i><span> 时间轴</span></a></div><div class="menus_item"><a class="site-page" href="/tags/"><i class="fa-fw fa fa-tags"></i><span> 标签</span></a></div><div class="menus_item"><a class="site-page" href="/categories/"><i class="fa-fw fa fa-folder-open"></i><span> 分类</span></a></div><div class="menus_item"><a class="site-page" href="/messageboard/"><i class="fa-fw fa fa-coffee"></i><span> 留言板</span></a></div><div class="menus_item"><a class="site-page" href="/link/"><i class="fa-fw fa fa-link"></i><span> 友链</span></a></div></div></div></div><div class="page" id="body-wrap"><header class="full_page" id="page-header" style="background-image: url('https://s1.ax1x.com/2022/04/21/L63aDS.jpg')"><nav id="nav"><span id="blog_name"><a id="site-name" href="/">Gruge's Blog</a></span><div id="menus"><div id="search-button"><a class="site-page social-icon search"><i class="fas fa-search fa-fw"></i><span> 搜索</span></a></div><div class="menus_items"><div class="menus_item"><a class="site-page" href="/"><i class="fa-fw fa fa-home"></i><span> 首页</span></a></div><div class="menus_item"><a class="site-page" href="/archives/"><i class="fa-fw fa fa-archive"></i><span> 时间轴</span></a></div><div class="menus_item"><a class="site-page" href="/tags/"><i class="fa-fw fa fa-tags"></i><span> 标签</span></a></div><div class="menus_item"><a class="site-page" href="/categories/"><i class="fa-fw fa fa-folder-open"></i><span> 分类</span></a></div><div class="menus_item"><a class="site-page" href="/messageboard/"><i class="fa-fw fa fa-coffee"></i><span> 留言板</span></a></div><div class="menus_item"><a class="site-page" href="/link/"><i class="fa-fw fa fa-link"></i><span> 友链</span></a></div></div><div id="toggle-menu"><a class="site-page"><i class="fas fa-bars fa-fw"></i></a></div></div></nav><div id="site-info"><h1 id="site-title">Gruge's Blog</h1><div id="site-subtitle"><span id="subtitle"></span></div></div><div id="scroll-down"><i class="fas fa-angle-down scroll-down-effects"></i></div></header><main class="layout" id="content-inner"><div class="recent-posts" id="recent-posts"><div class="recent-post-item"><div class="post_cover left"><a href="/2022/08/05/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%AE%9E%E9%AA%8C/" title="数字图像处理实验"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="数字图像处理实验"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/08/05/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%AE%9E%E9%AA%8C/" title="数字图像处理实验">数字图像处理实验</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-08-05T07:52:11.000Z" title="发表于 2022-08-05 15:52:11">2022-08-05</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/">数字图像处理基础</a></span></div><div class="content">数字图像处理的基础将彩色图转换为灰度图代码：
1234RGB = imread('D:\reports\test.jpg')subplot(121),imshow(RGB)gray = rgb2gray(RGB)subplot(122),imshow(gray)
转换的结果是：
将灰度图转为为索引图代码：
123456RGB = imread('D:\reports\test.jpg')subplot(221),imshow(RGB)gray = rgb2gray(RGB)subplot(222),imshow(gray)[X,map] = gray2ind(gray,8)subplot(223),imshow(X,map)
结果：
结论：变为索引值之后图像变得非常的不自然了，图中的显色有分块的现象，特别是在水中的那部分，这是为什么呢？将函数中索引值8增大，这个值越大发现图像之中的颜色表示就更加的自然（最后那幅图的索引值是64的）
索引值：图像颜色映射的个数，也表示图像的灰度级数
将索引图转化为真彩色的图代码：
12345678RGB ...</div></div></div><div class="recent-post-item"><div class="post_cover right"><a href="/2022/05/04/DASCTF2022-FATE/" title="DASCTF2022-FATE"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="DASCTF2022-FATE"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/05/04/DASCTF2022-FATE/" title="DASCTF2022-FATE">DASCTF2022-FATE</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-05-04T09:44:12.000Z" title="发表于 2022-05-04 17:44:12">2022-05-04</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">CrackMeMFC的逆向分析CracckMe,写题的时候在网上搜到了逆向分析CrackMe 这篇文章，通过OD+IDA的方式定位到关键代码处，然后进行解密的操作。
知识点： MD5 Sha1 Hashcat Wincrpt
定位关键函数OD来定位关键代码和提取数据，因为这个程序有反调试，而OD之中有插件，能够很好的反反调试而提取相关的数据。
IDA能够很好的反编译相应的代码，搞清楚函数的逻辑。
搜索MessageBoxA，因为当输入flag和key之后，输入错误会弹出弹窗，而MessageBoxA 有可能是表示弹窗的函数位置
（Ctrl+G）跟踪表达式【TextA/W】 就找到引用这个函数的地址，看到这个地址之后，发现它的下方就是“Wrong!!!“字符串，就找到对应输出Wrong的这个函数的位置，
定位到输出wrong!!!的代码处
并且在它的下面就是输出successful的代码处
在ida之中能更加容易的分析代码，所以通过这两个输出wrong和Success的地址，在ida之中定位到这两个函数，并且通过他们向上就找（交叉引用的方法）到对输入的key和flag进行验证的函 ...</div></div></div><div class="recent-post-item"><div class="post_cover left"><a href="/2022/04/25/starCTF2022-Simple-NaCl/" title="starCTF2022_Simple+NaCl"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="starCTF2022_Simple+NaCl"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/04/25/starCTF2022-Simple-NaCl/" title="starCTF2022_Simple+NaCl">starCTF2022_Simple+NaCl</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-04-25T12:10:56.000Z" title="发表于 2022-04-25 20:10:56">2022-04-25</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">Simple_File_System这道题当时卡在这里就是不知道存放的数据在哪里，结果后来发现就是在image.flag文件之中（被自己蠢哭了！！！！）
数据提取将程序运行一遍，将加密之后的文本的内容写入一个文件之中，再将这个文件放入010之中，提取前5个字节的内容，也就是 *CTF{ 加密之后的结果，然后再将image.flag文件放入ida之中，搜素这5个字节，将这段数据提取出来，这段数据就是flag加密之后的结果了，分析加密过程，逆得结果
解密过程分析代码就能找到对flag文件加密的关键代码
异或的对象 0xDEEDBEEF
解密脚本12345678910111213src = [0x00,0xD2,0xFC,0xD8,0xA2,0xDA,0xBA,0x9E,0x9C,0x26,0xF8,0xF6,0xB4,0xCE,0x3C,0xCC,0x96,0x88,0x98,0x34,0x82,0xDE,0x80,0x36,0x8A,0xD8,0xC0,0xF0,0x38,0xAE,0x40]for i in range(len(src)): src[i] = ((src[i] ...</div></div></div><div class="recent-post-item"><div class="post_cover right"><a href="/2022/04/21/DASCTF-Login/" title="DASCTF_Login"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="DASCTF_Login"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/04/21/DASCTF-Login/" title="DASCTF_Login">DASCTF_Login</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-04-21T06:04:38.000Z" title="发表于 2022-04-21 14:04:38">2022-04-21</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">Login这道题里面给了两个文件，一个作为了客户端，一个作为服务器，两个程序之间相互传输数据，对登录的token、password以及verify这三个数进行了验证。
验证的主逻辑是在check程序之中，这里有三中加密（RSA、Hill、AES），这次的AES进行了魔改，解密的脚本不得不自己来码代码！！
两个程序的交互提供了两个文件，一个文佳时客户端界面，一个时服务器界面，要实现两个页面的交互
打开的是两个程序，一个程序作为的是客户端（login），一个作为的是服务器（check）
在这两个程序之中找到start函数，然后打开第一个参数，就是main函数
login程序：
和服务器进行一系列的交互
一个while循环向服务器发送和接受消息
其中的if语句会根据接受到的参数，来做出特定的反应
连接服务器：
客户端和服务器间的交互：
if语句发送数据：
客户端：
连接客户端：
进入main函数之中，和客户端进行交互，验证三个数据
rsa解密大素数：
113123058934861171416713230498081453101147538789122070079961388 ...</div></div></div><div class="recent-post-item"><div class="post_cover left"><a href="/2022/04/15/HFCTF2022-theShellcode/" title="HFCTF2022_theShellcode"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="HFCTF2022_theShellcode"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/04/15/HFCTF2022-theShellcode/" title="HFCTF2022_theShellcode">HFCTF2022_theShellcode</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-04-15T14:35:25.000Z" title="发表于 2022-04-15 22:35:25">2022-04-15</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">the_shellcode用ida载入之后，显然这个地方被加壳了，这里是Themida壳
定位到OPE这是是使用插件直接反反调试
sharpOD安装sharpOD，设置其中的配置：主要时要勾上图中标注的那个选项（这个可以去程序中的反调试）
按f9就能够运行起程序，就能够运行起程序了
OPE定位并且下硬件断点按E打开可执行模块窗口
可执行模块窗口:（快捷键：Alt+E）列出了当前被调试进程加载的所有可执行模块。它也显示了很多有用的信息，比如模块大小、入口地址、模块版本、以及可执行文件路径等。
打开该模块我们看到时一堆乱码，在这里我们需要去掉模块分析（汇编窗口，右键 -> 分析 -> 从模块中删除分析）
通过查找程序执行时输出的字符串 “please input the shellcode:” 定位到程序的正真入口的地方
右键->Search for -> All referenced text strings
通过上面的字符串表我们就到达了程序的入口处了 push ebp的位置，我们就直接在这个地方下断点（方便之后直接定位到程序的入口）
这 ...</div></div></div><div class="recent-post-item"><div class="post_cover right"><a href="/2022/04/13/starCTF/" title="starCTF2021"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="starCTF2021"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/04/13/starCTF/" title="starCTF2021">starCTF2021</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-04-13T01:20:26.000Z" title="发表于 2022-04-13 09:20:26">2022-04-13</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">StarCTF2021自己的程序分析能力还要加强啊！！！！chacha20的解密不知道问题出在哪里？？？ qemu-riscv64也没能配置好环境，调试不了程序，所以 Favourite Architecture flag0 只解了一半，希望有大佬能指导指导咋搞啊？？？
Stram这是一个rust编写的elf文件
程序流程分析找到main函数，进入第一个函数之中
读取输入数据打开flag文件，读取其中的数据
对输入的加密过程这里的加密过程调用了rustcrypto_api
init_chacha: 利用输入生成随机数种子
refill_wide：流密钥加密的过程
因为密钥的生成和输入显然是有关系的，这样的流密钥加密我们并不能够直接解密，所以使用爆破的方法
加密结果的输出加密的结果会被写入到一个名为output的文件之中
所以该程序的输入，我们可以通过写入flag文件输入；该程序输出的获取，我们可以通过读取ouput文件得知
python和程序的交互（subprocess模块）subprocess模块
subprocess.Popen 类:创建并返回一个子进程，并在这个进 ...</div></div></div><div class="recent-post-item"><div class="post_cover left"><a href="/2022/04/05/2022DASCTF-X-SU-StarGate/" title="2022DASCTF_X_SU_StarGate"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="2022DASCTF_X_SU_StarGate"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/04/05/2022DASCTF-X-SU-StarGate/" title="2022DASCTF_X_SU_StarGate">2022DASCTF_X_SU_StarGate</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-04-05T14:46:18.000Z" title="发表于 2022-04-05 22:46:18">2022-04-05</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">StarGate这道题因为自己各种基础知识不牢固的原因写了很久，细节上的知识需要自己不断地积累，也觉得自己写代码太烂了！！！太菜了！！！
使用nc连接靶机，返回得到文件的base64加密内容
提取出这个base64加密的内容，放入在线网站之中bse64解密，得到的是一个elf文件
将这个elf文件放入ida之中，通过字符串定位到关键的代码位置
分析流程（欧拉路径问题）题目之中给了提示 “寻找欧拉路径”
对于一个给定的图，怎样判断是否存在着一个恰好包含了所有的边，并且没有重复的路径？这就是一笔画问题。用图论的术语来说，就是判断这个图是否是一个能够遍历完所有的边而没有重复。这样的图现称为欧拉图。这时遍历的路径称作欧拉路径（一个环或者一条链），如果路径闭合（一个圈），则称为欧拉回路
通过catflag这个字符串定位到一个相关联的函数
if语句之中的判断条件是判断走过了所有的路径，每个变量参数代表的是某路径是否走过的标志位
查看字符串表，图中红色方框中的字符串就能够定位到一个函数之中，每个函数之中的逻辑都一样
字符串定位到的函数：每次输入一个字符串，相当于到达某一个对应的函数，跳 ...</div></div></div><div class="recent-post-item"><div class="post_cover right"><a href="/2022/03/29/%E9%99%87%E5%8E%9F%E6%88%98%E7%96%AB2021%E7%BD%91%E7%BB%9C%E5%AE%89%E5%85%A8%E5%A4%A7%E8%B5%9B/" title="陇原战疫2021网络安全大赛"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="陇原战疫2021网络安全大赛"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/03/29/%E9%99%87%E5%8E%9F%E6%88%98%E7%96%AB2021%E7%BD%91%E7%BB%9C%E5%AE%89%E5%85%A8%E5%A4%A7%E8%B5%9B/" title="陇原战疫2021网络安全大赛">陇原战疫2021网络安全大赛</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-03-29T05:20:37.000Z" title="发表于 2022-03-29 13:20:37">2022-03-29</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">陇原战”疫”2021网络安全大赛最后还加了一道周末打的DASCTF比赛的re题目
findmeRC4加密
定位加密函数在main函数之中是主逻辑
通过里面比较的函数定位到对应的位置，发现是引用了strcmp这个函数
可以看到这个函数可能被另外一个函数改动了，定位到这个函数，这一看到这个函数把strcmp指引到了另外一个函数
RC4算法S盒的生成
它的S盒是利用用户输入的密钥生成S盒
利用密钥流进行加密的操作
RC4加密的函数
S盒的生成S盒的生成的函数：sub_40164C((int)v9, (int)v7, v4);
对输入进行加密的函数：sub_401767((int)v8, (int)v6, v10);
所以将内存之中需要解密的数据dump出来
密文需要解密的对象是：
1[0xb7,0x52,0x85,0xc1,0x90,0xe9,0x07,0xb8,0xe4,0x1a,0xc3,0xbd,0x1d,0x8e,0x85,0x46,0x00,0x21,0x44,0xaf,0xef,0x70,0x32,0xb5,0x11,0xc6]
密钥密钥是引用该函数输入的参数： ...</div></div></div><div class="recent-post-item"><div class="post_cover left"><a href="/2022/03/20/DASCTF-Oct/" title="DASCTF_Oct"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="DASCTF_Oct"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/03/20/DASCTF-Oct/" title="DASCTF_Oct">DASCTF_Oct</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-03-20T01:53:18.000Z" title="发表于 2022-03-20 09:53:18">2022-03-20</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%A4%8D%E7%8E%B0/">复现</a></span></div><div class="content">DASCTF_Oct_re这两道题中都有加密的知识点，第一道题的SM4的解密在最后一步仍然有问题，希望大佬能够指点指点(●’◡’●)
马猴烧酒知识点：
魔改SM4
魔改base64
用ida6将文件载入其中
定位到相应的代码的位置，这段代码开始的位置就有一段flag{this_is_fake_flag}的flag
密钥的生成第一个函数是获取时间戳，第二个函数是对时间戳base64的变表加密，第三个异或运算得到密钥
获取时间戳使用0x61624B82 演变得到一串数组
脚本：
12345678910111213141516key = 0x61624B82a13 = 0a14 = 0while key: a13 = key%10 key = key//10 a14 = 87 if a13<=9: a14 = 48 print(chr(a13+a14),end='') obj = '0181383361'for i in range(len(obj)): print(obj[l ...</div></div></div><div class="recent-post-item"><div class="post_cover right"><a href="/2022/03/17/frida-d3mug%E5%A4%8D%E7%8E%B0/" title="frida+d3mug复现"><img class="post_bg" src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="frida+d3mug复现"></a></div><div class="recent-post-info"><a class="article-title" href="/2022/03/17/frida-d3mug%E5%A4%8D%E7%8E%B0/" title="frida+d3mug复现">frida+d3mug复现</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2022-03-17T04:21:15.000Z" title="发表于 2022-03-17 12:21:15">2022-03-17</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/categories/%E5%AE%89%E5%8D%93%E9%80%86%E5%90%91/">安卓逆向</a></span></div><div class="content">FRIDA-API使用篇frida中有五种对象，分别是Java、Interceptor、NativePointer、NativeFunction、NativeCallback对象
这些都是在编写frida脚本的时候会用到的对象以及对应的函数。
frida知识更多的学习，可以查看这些文章
Java对象无论是想对so层亦或java层进行拦截，都必须编写Java.perform，java对象是很重要的
附加调用Java.performJava.perform（fn）主要用于当前线程附加到Java VM并且调用fn方法。该API是非常重要的
示例：
1234567891011121314151617unction frida_Java() { //运行当前js脚本时会对当前线程附加到Java VM虚拟机，并且执行function方法 Java.perform(function () { //判断是否Java VM正常运行 if(Java.available) { //如不意外会直接输出 h ...</div></div></div><nav id="pagination"><div class="pagination"><span class="page-number current">1</span><a class="page-number" href="/page/2/#content-inner">2</a><a class="extend next" rel="next" href="/page/2/#content-inner"><i class="fas fa-chevron-right fa-fw"></i></a></div></nav></div><div class="aside-content" id="aside-content"><div class="card-widget card-info"><div class="is-center"><div class="avatar-img"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/463b631c6a0f63ec.jpg" onerror="this.onerror=null;this.src='/img/friend_404.gif'" alt="avatar"></div><div class="author-info__name">Gruge</div><div class="author-info__description"></div></div><div class="card-info-data is-center"><div class="card-info-data-item"><a href="/archives/"><div class="headline">文章</div><div class="length-num">18</div></a></div><div class="card-info-data-item"><a href="/tags/"><div class="headline">标签</div><div class="length-num">42</div></a></div><div class="card-info-data-item"><a href="/categories/"><div class="headline">分类</div><div class="length-num">7</div></a></div></div><a id="card-info-btn" target="_blank" rel="noopener" href="https://github.com/xxxxxx"><i class="fab fa-github"></i><span>Follow Me</span></a></div><div class="card-widget card-announcement"><div class="item-headline"><i class="fas fa-bullhorn fa-shake"></i><span>公告</span></div><div class="announcement_content">This is my Blog</div></div><div class="sticky_layout"><div class="card-widget card-recent-post"><div class="item-headline"><i class="fas fa-history"></i><span>最新文章</span></div><div class="aside-list"><div class="aside-list-item"><a class="thumbnail" href="/2022/08/05/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%AE%9E%E9%AA%8C/" title="数字图像处理实验"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="数字图像处理实验"></a><div class="content"><a class="title" href="/2022/08/05/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%AE%9E%E9%AA%8C/" title="数字图像处理实验">数字图像处理实验</a><time datetime="2022-08-05T07:52:11.000Z" title="发表于 2022-08-05 15:52:11">2022-08-05</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/2022/05/04/DASCTF2022-FATE/" title="DASCTF2022-FATE"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="DASCTF2022-FATE"></a><div class="content"><a class="title" href="/2022/05/04/DASCTF2022-FATE/" title="DASCTF2022-FATE">DASCTF2022-FATE</a><time datetime="2022-05-04T09:44:12.000Z" title="发表于 2022-05-04 17:44:12">2022-05-04</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/2022/04/25/starCTF2022-Simple-NaCl/" title="starCTF2022_Simple+NaCl"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="starCTF2022_Simple+NaCl"></a><div class="content"><a class="title" href="/2022/04/25/starCTF2022-Simple-NaCl/" title="starCTF2022_Simple+NaCl">starCTF2022_Simple+NaCl</a><time datetime="2022-04-25T12:10:56.000Z" title="发表于 2022-04-25 20:10:56">2022-04-25</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/2022/04/21/DASCTF-Login/" title="DASCTF_Login"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="DASCTF_Login"></a><div class="content"><a class="title" href="/2022/04/21/DASCTF-Login/" title="DASCTF_Login">DASCTF_Login</a><time datetime="2022-04-21T06:04:38.000Z" title="发表于 2022-04-21 14:04:38">2022-04-21</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/2022/04/15/HFCTF2022-theShellcode/" title="HFCTF2022_theShellcode"><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://s3.bmp.ovh/imgs/2022/02/ca6f47126f533a59.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="HFCTF2022_theShellcode"></a><div class="content"><a class="title" href="/2022/04/15/HFCTF2022-theShellcode/" title="HFCTF2022_theShellcode">HFCTF2022_theShellcode</a><time datetime="2022-04-15T14:35:25.000Z" title="发表于 2022-04-15 22:35:25">2022-04-15</time></div></div></div></div><div class="card-widget card-categories"><div class="item-headline">
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<li class="card-category-list-item "><a class="card-category-list-link" href="/categories/re/"><span class="card-category-list-name">re</span><span class="card-category-list-count">2</span></a></li><li class="card-category-list-item "><a class="card-category-list-link" href="/categories/%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86/"><span class="card-category-list-name">加密解密</span><span class="card-category-list-count">1</span></a></li><li class="card-category-list-item "><a class="card-category-list-link" href="/categories/%E5%A4%8D%E7%8E%B0/"><span class="card-category-list-name">复现</span><span class="card-category-list-count">10</span></a></li><li class="card-category-list-item "><a class="card-category-list-link" href="/categories/%E5%AE%89%E5%8D%93%E9%80%86%E5%90%91/"><span class="card-category-list-name">安卓逆向</span><span class="card-category-list-count">2</span></a></li><li class="card-category-list-item "><a class="card-category-list-link" href="/categories/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/"><span class="card-category-list-name">数字图像处理基础</span><span class="card-category-list-count">1</span></a></li><li class="card-category-list-item "><a class="card-category-list-link" href="/categories/%E6%B7%B7%E6%B7%86/"><span class="card-category-list-name">混淆</span><span class="card-category-list-count">1</span></a></li><li class="card-category-list-item "><a class="card-category-list-link" href="/categories/%E9%A2%98%E5%9E%8B/"><span class="card-category-list-name">题型</span><span class="card-category-list-count">1</span></a></li>
</ul></div><div class="card-widget card-tags"><div class="item-headline"><i class="fas fa-tags"></i><span>标签</span></div><div class="card-tag-cloud"><a href="/tags/AES/" style="font-size: 1.1em; color: #999">AES</a> <a href="/tags/AES%E8%A7%A3%E5%AF%86/" style="font-size: 1.1em; color: #999">AES解密</a> <a href="/tags/APK%E5%8A%A0%E5%9B%BA/" style="font-size: 1.1em; color: #999">APK加固</a> <a href="/tags/APK%E8%84%B1%E5%A3%B3-blackdex/" style="font-size: 1.1em; color: #999">APK脱壳(blackdex)</a> <a href="/tags/ARM/" style="font-size: 1.1em; color: #999">ARM</a> <a href="/tags/Ghidra%E5%8F%8D%E7%BC%96%E8%AF%91/" style="font-size: 1.1em; color: #999">Ghidra反编译</a> <a href="/tags/RC4/" style="font-size: 1.1em; color: #999">RC4</a> <a href="/tags/RSA/" style="font-size: 1.1em; color: #999">RSA</a> <a href="/tags/RSA%E4%BD%8E%E8%A7%A3%E5%AF%86%E6%8C%87%E6%95%B0%E6%94%BB%E5%87%BB/" style="font-size: 1.1em; color: #999">RSA低解密指数攻击</a> <a href="/tags/SHA1/" style="font-size: 1.1em; color: #999">SHA1</a> <a href="/tags/SM4%E8%A7%A3%E5%AF%86/" style="font-size: 1.1em; color: #999">SM4解密</a> <a href="/tags/TEA/" style="font-size: 1.1em; color: #999">TEA</a> <a href="/tags/Themida%E8%84%B1%E5%A3%B3/" style="font-size: 1.1em; color: #999">Themida脱壳</a> <a href="/tags/Wincrpt%E8%A7%A3%E5%AF%86AES/" style="font-size: 1.1em; color: #999">Wincrpt解密AES</a> <a href="/tags/base91%E8%A7%A3%E5%AF%86/" style="font-size: 1.1em; color: #999">base91解密</a> <a href="/tags/binToHex/" style="font-size: 1.1em; color: #999">binToHex</a> <a href="/tags/chacha20/" style="font-size: 1.1em; color: #999">chacha20</a> <a href="/tags/frida/" style="font-size: 1.1em; color: #999">frida</a> <a href="/tags/hill%E8%A7%A3%E5%AF%86/" style="font-size: 1.1em; color: #999">hill解密</a> <a href="/tags/idaPython/" style="font-size: 1.1em; color: #999">idaPython</a> <a href="/tags/idapython/" style="font-size: 1.1em; color: #999">idapython</a> <a href="/tags/md5/" style="font-size: 1.1em; color: #999">md5</a> <a href="/tags/pyc%E6%96%87%E4%BB%B6%E5%8F%8D%E7%BC%96%E8%AF%91-pycdc%E5%B7%A5%E5%85%B7/" style="font-size: 1.1em; color: #999">pyc文件反编译(pycdc工具)</a> <a href="/tags/pyc%E6%96%87%E4%BB%B6%E8%A7%A3%E5%8C%85-pyinstxtractor/" style="font-size: 1.1em; color: #999">pyc文件解包(pyinstxtractor)</a> <a href="/tags/pyz%E6%96%87%E4%BB%B6%E8%A7%A3%E5%AF%86/" style="font-size: 1.1em; color: #999">pyz文件解密</a> <a href="/tags/qemu-riscv64/" style="font-size: 1.1em; color: #999">qemu-riscv64</a> <a href="/tags/sharpOD%E5%8F%8D%E8%B0%83%E8%AF%95/" style="font-size: 1.1em; color: #999">sharpOD反调试</a> <a href="/tags/so%E6%96%87%E4%BB%B6/" style="font-size: 1.1em; color: #999">so文件</a> <a href="/tags/subprocess%E6%A8%A1%E5%9D%97/" style="font-size: 1.1em; color: #999">subprocess模块</a> <a href="/tags/susctf/" style="font-size: 1.1em; color: #999">susctf</a> <a href="/tags/wasm/" style="font-size: 1.1em; color: #999">wasm</a> <a href="/tags/xtea/" style="font-size: 1.1em; color: #999">xtea</a> <a href="/tags/%E4%BF%AE%E5%A4%8DIAT%E8%A1%A8-Scylla/" style="font-size: 1.1em; color: #999">修复IAT表(Scylla)</a> <a href="/tags/%E5%A4%8D%E7%8E%B0/" style="font-size: 1.5em; color: #99a9bf">复现</a> <a href="/tags/%E6%95%B0%E5%AD%97%E5%9B%BE%E5%83%8F%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80%E5%AE%9E%E9%AA%8C/" style="font-size: 1.1em; color: #999">数字图像处理基础实验</a> <a href="/tags/%E6%96%87%E4%BB%B6%E7%B3%BB%E7%BB%9F/" style="font-size: 1.1em; color: #999">文件系统</a> <a href="/tags/%E6%A0%88%E6%BA%A2%E5%87%BA/" style="font-size: 1.1em; color: #999">栈溢出</a> <a href="/tags/%E6%AC%A7%E6%8B%89%E8%B7%AF%E5%BE%84/" style="font-size: 1.1em; color: #999">欧拉路径</a> <a href="/tags/%E7%AD%BE%E5%90%8D%E6%96%87%E4%BB%B6/" style="font-size: 1.1em; color: #999">签名文件</a> <a href="/tags/%E7%BA%BF%E6%80%A7%E6%96%B9%E7%A8%8B%E6%B1%82%E8%A7%A3/" style="font-size: 1.1em; color: #999">线性方程求解</a></div></div><div class="card-widget card-archives"><div class="item-headline"><i class="fas fa-archive"></i><span>归档</span></div><ul class="card-archive-list"><li class="card-archive-list-item"><a class="card-archive-list-link" href="/archives/2022/08/"><span class="card-archive-list-date">八月 2022</span><span class="card-archive-list-count">1</span></a></li><li class="card-archive-list-item"><a class="card-archive-list-link" href="/archives/2022/05/"><span class="card-archive-list-date">五月 2022</span><span class="card-archive-list-count">1</span></a></li><li class="card-archive-list-item"><a class="card-archive-list-link" href="/archives/2022/04/"><span class="card-archive-list-date">四月 2022</span><span class="card-archive-list-count">5</span></a></li><li class="card-archive-list-item"><a class="card-archive-list-link" href="/archives/2022/03/"><span class="card-archive-list-date">三月 2022</span><span class="card-archive-list-count">8</span></a></li><li class="card-archive-list-item"><a class="card-archive-list-link" href="/archives/2022/02/"><span class="card-archive-list-date">二月 2022</span><span class="card-archive-list-count">3</span></a></li></ul></div><div class="card-widget card-webinfo"><div class="item-headline"><i class="fas fa-chart-line"></i><span>网站资讯</span></div><div class="webinfo"><div class="webinfo-item"><div class="item-name">文章数目 :</div><div class="item-count">18</div></div><div class="webinfo-item"><div class="item-name">本站访客数 :</div><div class="item-count" id="busuanzi_value_site_uv"></div></div><div class="webinfo-item"><div class="item-name">本站总访问量 :</div><div class="item-count" id="busuanzi_value_site_pv"></div></div><div class="webinfo-item"><div class="item-name">最后更新时间 :</div><div class="item-count" id="last-push-date" data-lastpushdate="2022-08-05T08:10:31.400Z"></div></div></div></div></div></div></main><footer id="footer" style="background: transparent"><div id="footer-wrap"><div class="copyright">©2022 By Gruge</div><div class="framework-info"><span>框架 </span><a target="_blank" rel="noopener" href="https://hexo.io">Hexo</a><span class="footer-separator">|</span><span>主题 </span><a target="_blank" rel="noopener" href="https://github.com/jerryc127/hexo-theme-butterfly">Butterfly</a></div></div></footer></div><div id="rightside"><div id="rightside-config-hide"><button id="darkmode" type="button" title="浅色和深色模式转换"><i class="fas fa-adjust"></i></button><button id="hide-aside-btn" type="button" title="单栏和双栏切换"><i class="fas fa-arrows-alt-h"></i></button></div><div id="rightside-config-show"><button id="rightside_config" type="button" title="设置"><i class="fas fa-cog fa-spin"></i></button><button id="go-up" type="button" title="回到顶部"><i class="fas fa-arrow-up"></i></button></div></div><div id="local-search"><div class="search-dialog"><nav class="search-nav"><span class="search-dialog-title">本地搜索</span><span id="loading-status"></span><button class="search-close-button"><i class="fas fa-times"></i></button></nav><div class="is-center" id="loading-database"><i class="fas fa-spinner fa-pulse"></i><span> 数据库加载中</span></div><div class="search-wrap"><div id="local-search-input"><div class="local-search-box"><input class="local-search-box--input" placeholder="搜索文章" type="text"></div></div><hr><div id="local-search-results"></div></div></div><div id="search-mask"></div></div><div><script src="/js/utils.js"></script><script src="/js/main.js"></script><script src="https://cdn.jsdelivr.net/npm/@fancyapps/ui/dist/fancybox.umd.js"></script><script src="https://cdn.jsdelivr.net/npm/vanilla-lazyload/dist/lazyload.iife.min.js"></script><script src="https://cdn.jsdelivr.net/npm/node-snackbar/dist/snackbar.min.js"></script><script src="/js/search/local-search.js"></script><script>var preloader = {
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