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<a class="post-title-link" href="/2019/03/16/My-First-Post/" itemprop="url">小米固件工具mkxqimage</a></h1>
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<time title="创建于" itemprop="dateCreated datePublished" datetime="2019-03-16T14:57:56+08:00">
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2019-03-16
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<h1 id="小米固件工具mkxqimage"><a href="#小米固件工具mkxqimage" class="headerlink" title="小米固件工具mkxqimage"></a>小米固件工具mkxqimage</h1><p>小米自己改了个打包解包固件的工具，基于 trx 改的（本质上还是 trx 格式），加了 RSA 验证和解包功能，路由系统里自带：<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">Usage:</span><br><span class="line">mkxqimg [-o outfile] [-p private_key] [-f file] [-f file [-f file [-f file ]]]</span><br><span class="line"> [-x file]</span><br><span class="line"> [-I]</span><br></pre></td></tr></table></figure></p>
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<h2 id="固件解包"><a href="#固件解包" class="headerlink" title="固件解包"></a>固件解包</h2><p>固件工具mkxqimage完成对固件的解包，在解包前先检查Checksum是否正确，然后利用RSA公钥/usr/share/xiaoqiang/public.pem检查RSA签名，这两个步骤通过后，根据[0x0C]的固件类型，以及[0x10]、[0x14]、[0x18]和[0x1C]的4个偏移量拆分固件。</p>
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<h2 id="固件打包"><a href="#固件打包" class="headerlink" title="固件打包"></a>固件打包</h2><p>小米官方在打包固件时用RSA私钥计算出固件的RSA签名，小米路由器下载固件后用RSA公钥来验证RSA签名，有效地防止固件被篡改。</p>
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<h2 id="固件格式"><a href="#固件格式" class="headerlink" title="固件格式"></a><a href="http://www.iptvfans.cn/wiki/index.php/%E5%B0%8F%E7%B1%B3%E8%B7%AF%E7%94%B1%E5%99%A8%E5%9B%BA%E4%BB%B6%E5%88%86%E6%9E%90" target="_blank" rel="noopener">固件格式</a></h2><p>路由固件的格式，基本是基于 openwrt 的 trx 这个简单的二进制文件格式<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">48 44 52 30 63 D4 11 03 FE 3D 1A FD 05 00 02 00</span><br><span class="line">20 00 00 00 20 00 FE 00 00 00 00 00 00 00 00 00</span><br><span class="line">FF 04 00 EA 14 F0 9F E5 14 F0 9F E5 14 F0 9F E5</span><br></pre></td></tr></table></figure></p>
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<p>第1～4字节：ASCII字符串“HDR0”，作为固件的标识；<br>第5～8字节：4字节整型数0x0311D464，表示固件的大小：51500132字节；<br>第9~12字节：固件的检查和；<br>第13～14字节：0x0005，表示固件中包含哪些部分；<br>第15～16字节：0x0002，表示固件格式版本号；<br>第17～20字节：0x00000020，表示固件第一部分在整个固件中的偏移量，0.4.85固件的第一部分是brcm4709_nor.bin，也就是Flash中除0xfe0000-0xff0000的board_data外的全镜像；<br>第21～24字节：0x00FE0020，表示固件第二部分在整个固件中的偏移量，0.4.85固件的第二部分是root.ext4.lzma，也就是硬盘中128M固件的压缩包；<br>第33字节开始是固件的正式内容开始。</p>
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<h2 id="小米开启ssh工具包"><a href="#小米开启ssh工具包" class="headerlink" title="小米开启ssh工具包"></a>小米开启ssh工具包</h2><p>使用mkxqimage解包<br>（现在会提示秘钥不存在）<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">error fopen public key</span><br><span class="line">Image verify failed, not formal image</span><br></pre></td></tr></table></figure></p>
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<p>如果能解包应该可以得到脚本文件upsetting.sh</p>
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<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">#!/bin/sh</span><br><span class="line">nvram set ssh_en=1</span><br><span class="line">nvram set flag_init_root_pwd=1</span><br><span class="line">nvram commit</span><br></pre></td></tr></table></figure>
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<p>执行脚本文件upsetting.sh后，将ssh_en设置为1，同时设置了flag_init_root_pwd项。当正式启动时，/usr/sbin/boot_check脚本检测到flag_init_root_pwd=1时，自动修改root用户密码，具体脚本为：<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">flg_init_pwd=`nvram get flag_init_root_pwd`</span><br><span class="line">if [ "$flg_init_pwd" = "1" ]; then</span><br><span class="line"> init_pwd=`mkxqimage -I`</span><br><span class="line"> (echo $init_pwd; sleep 1; echo $init_pwd) | passwd root</span><br><span class="line"> nvram unset flag_init_root_pwd</span><br><span class="line"> nvram commit</span><br><span class="line">fi</span><br></pre></td></tr></table></figure></p>
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<p>初始密码是mkxqimage -I的结果，实际是根据路由器的序列号计算得到。路由器的序列号印在底盖上，12位数字，如：561000088888</p>
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<p>初始密码计算算法为：</p>
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<p><code>substr(md5(SN+"A2E371B0-B34B-48A5-8C40-A7133F3B5D88"), 0, 8)</code></p>
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<p><strong><em>A2E371B0-B34B-48A5-8C40-A7133F3B5D88</em></strong> 为分析mkxqimage得到的salt</p>
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2019-03-16
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<p>Welcome to <a href="https://hexo.io/" target="_blank" rel="noopener">Hexo</a>! This is your very first post. Check <a href="https://hexo.io/docs/" target="_blank" rel="noopener">documentation</a> for more info. If you get any problems when using Hexo, you can find the answer in <a href="https://hexo.io/docs/troubleshooting.html" target="_blank" rel="noopener">troubleshooting</a> or you can ask me on <a href="https://github.com/hexojs/hexo/issues" target="_blank" rel="noopener">GitHub</a>.</p>
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<h2 id="Quick-Start"><a href="#Quick-Start" class="headerlink" title="Quick Start"></a>Quick Start</h2><h3 id="Create-a-new-post"><a href="#Create-a-new-post" class="headerlink" title="Create a new post"></a>Create a new post</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo new <span class="string">"My New Post"</span></span><br></pre></td></tr></table></figure>
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<p>More info: <a href="https://hexo.io/docs/writing.html" target="_blank" rel="noopener">Writing</a></p>
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<h3 id="Run-server"><a href="#Run-server" class="headerlink" title="Run server"></a>Run server</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo server</span><br></pre></td></tr></table></figure>
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<p>More info: <a href="https://hexo.io/docs/server.html" target="_blank" rel="noopener">Server</a></p>
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<h3 id="Generate-static-files"><a href="#Generate-static-files" class="headerlink" title="Generate static files"></a>Generate static files</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo generate</span><br></pre></td></tr></table></figure>
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<p>More info: <a href="https://hexo.io/docs/generating.html" target="_blank" rel="noopener">Generating</a></p>
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<h3 id="Deploy-to-remote-sites"><a href="#Deploy-to-remote-sites" class="headerlink" title="Deploy to remote sites"></a>Deploy to remote sites</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo deploy</span><br></pre></td></tr></table></figure>
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<p>More info: <a href="https://hexo.io/docs/deployment.html" target="_blank" rel="noopener">Deployment</a></p>
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||
|
||
|
||
|
||
|
||
|
||
|
||
<footer class="post-footer">
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class="post-eof"></div>
|
||
|
||
</footer>
|
||
</div>
|
||
|
||
|
||
|
||
</article>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
|
||
<div class="sidebar-toggle">
|
||
<div class="sidebar-toggle-line-wrap">
|
||
<span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
|
||
<span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
|
||
<span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
|
||
</div>
|
||
</div>
|
||
|
||
<aside id="sidebar" class="sidebar">
|
||
|
||
<div class="sidebar-inner">
|
||
|
||
|
||
|
||
|
||
|
||
<section class="site-overview-wrap sidebar-panel sidebar-panel-active">
|
||
<div class="site-overview">
|
||
<div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
|
||
|
||
<p class="site-author-name" itemprop="name">Cool-Y</p>
|
||
<p class="site-description motion-element" itemprop="description"></p>
|
||
</div>
|
||
|
||
<nav class="site-state motion-element">
|
||
|
||
|
||
<div class="site-state-item site-state-posts">
|
||
|
||
<a href="/archives/">
|
||
|
||
<span class="site-state-item-count">2</span>
|
||
<span class="site-state-item-name">日志</span>
|
||
</a>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</nav>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</section>
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</aside>
|
||
|
||
|
||
|
||
</div>
|
||
</main>
|
||
|
||
<footer id="footer" class="footer">
|
||
<div class="footer-inner">
|
||
<div class="copyright">© <span itemprop="copyrightYear">2019</span>
|
||
<span class="with-love">
|
||
<i class="fa fa-user"></i>
|
||
</span>
|
||
<span class="author" itemprop="copyrightHolder">Cool-Y</span>
|
||
|
||
|
||
</div>
|
||
|
||
|
||
<div class="powered-by">由 <a class="theme-link" target="_blank" href="https://hexo.io">Hexo</a> 强力驱动</div>
|
||
|
||
|
||
|
||
<span class="post-meta-divider">|</span>
|
||
|
||
|
||
|
||
<div class="theme-info">主题 — <a class="theme-link" target="_blank" href="https://github.com/iissnan/hexo-theme-next">NexT.Muse</a> v5.1.4</div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</footer>
|
||
|
||
|
||
<div class="back-to-top">
|
||
<i class="fa fa-arrow-up"></i>
|
||
|
||
</div>
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
|
||
<script type="text/javascript">
|
||
if (Object.prototype.toString.call(window.Promise) !== '[object Function]') {
|
||
window.Promise = null;
|
||
}
|
||
</script>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/lib/jquery/index.js?v=2.1.3"></script>
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/lib/fastclick/lib/fastclick.min.js?v=1.0.6"></script>
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/lib/jquery_lazyload/jquery.lazyload.js?v=1.9.7"></script>
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/lib/velocity/velocity.min.js?v=1.2.1"></script>
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/lib/velocity/velocity.ui.min.js?v=1.2.1"></script>
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/lib/fancybox/source/jquery.fancybox.pack.js?v=2.1.5"></script>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/js/src/utils.js?v=5.1.4"></script>
|
||
|
||
<script type="text/javascript" src="/js/src/motion.js?v=5.1.4"></script>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<script type="text/javascript" src="/js/src/bootstrap.js?v=5.1.4"></script>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</body>
|
||
</html>
|