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<small><time class="date dt-published" datetime="2019-07-15T00:00:00+08:00">15 July 2019</time> - 字数统计：775 - 阅读大约需要3分钟 - Hits: <span id="/2019/07/15/encmail.html" class="visitors">Loading...</span></small>
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<h1 class="p-name">EncMail-Project Part 1 - 准备阶段</h1>
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这是一篇创建于 <span id="outime"></span> 天前的文章，其中的信息可能已经有所发展或是发生改变。
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<b>AI摘要</b>
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<p id="ai-output">这篇文章讲述了作者关于项目EncMail-Project的准备过程，主要使用Web Crypto API但遇到兼容性问题，因为找不到能生成密钥对的JS库；文档缺乏实例和英文理解障碍使得学习和实施复杂。作者选择使用MDUI进行界面设计，尽管原计划不考虑美观。为解决登录问题，计划使用AES加密私钥并存储在sessionStorage，同时结合使用公钥的SHA-256指纹进行验证。私钥的安全存储也是重点考虑的内容。整个项目预计耗时较多。</p>
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<ul><li><a href="#准备的内容">准备的内容</a></li><li><a href="#对计划的补充">对计划的补充</a></li></ul>
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参照：<a href="/2019/07/02/encmail.html">初计划</a></p>
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<h1 id="准备的内容">
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<a href="#准备的内容"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 准备的内容
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</h1>
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<p>最终经过多方研究，我打算用<a href="https://developer.mozilla.org/zh-CN/docs/Web/API/Web_Crypto_API">Web Crypto API</a>作为主要的实现方法。 </p><p>
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不过用这种API的兼容性并不怎么好……我的博客之所以用了各种各样的JS库也是为了兼容性 <del>（是不会写吧233333）</del> </p><p>
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其实主要原因是因为我在网上搜不到哪个JS库能生成密钥对……之前有看到过有一个名叫jsencrypt的库，可惜只能加解密，不能生成密钥对…… </p><p>
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说实话我从来都没有用过WebAPI，所以还得好好看看文档。但是这个破烂文档连例子都没有，这让人很难办，搜也搜不到有用的内容，而且我的英语并不算好，也不太习惯上<a href="https://stackoverflow.com/">Stack Overflow</a> <del>（不行，我要把锅推给某国的网络审查）</del> 。正是如此，这个项目制作起来可能会相当花时间。 </p><p>
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另外界面我打算用MDUI，那个文档看起来还挺简单。本来我没打算做一个好看的页面，就像之前制作的<a href="/2019/04/13/iwara.html">Iwara Downloader</a>一样，打算套个表格完事。但是既然这个UI看起来挺简单，那就试试这个吧，反正我也不考虑兼容性问题了，WebAPI都用上了，再加一个这个也不算什么吧。</p>
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<h1 id="对计划的补充">
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<a href="#对计划的补充"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 对计划的补充
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</h1>
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<p>计划的名称我打算命名为EncMail-Project <del>（看起来有点俗……）</del> ，不过这都不重要。 </p><p>
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关于登录方面，我后来又想了想，没有人会记私钥的，所以为了方便使用，我打算通过AES加密私钥，和公钥一起上传到服务器上保存。登录时把加密的私钥和被公钥加密的令牌下载下来，然后输入密码解密获得私钥并解密令牌。 </p><p>
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而之前想到的公钥被修改的问题，我想了想，那还是加上指纹吧（就是Hash啦），用SHA-256算法算出公钥的指纹，然后发送者在发送时自己对照一下就可以了（好像是<code class="language-plaintext highlighter-rouge">SubtleCrypto.digest()</code>？emmmm……这个文档没有翻译……）。 </p><p>
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另外为了安全，私钥我打算存到<code class="language-plaintext highlighter-rouge">sessionStorage</code>里，以减小私钥泄露的危险。</p>
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<p>今天就先到这里吧！</p></main>
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<small style="display: block">tags: <a rel="category tag" class="p-category" href="/search.html?keyword=%E5%88%86%E5%B8%83%E5%BC%8F"><em>分布式</em></a> - <a rel="category tag" class="p-category" href="/search.html?keyword=%E5%8A%A0%E5%AF%86"><em>加密</em></a> - <a rel="category tag" class="p-category" href="/search.html?keyword=%E9%82%AE%E4%BB%B6"><em>邮件</em></a> - <a rel="category tag" class="p-category" href="/search.html?keyword=%E8%AE%A1%E5%88%92"><em>计划</em></a> <span style="float: right;"><a href="https://gitlab.com/mayx/mayx.gitlab.io/tree/master/_posts/2019-07-15-encmail.md">查看原始文件</a></span></small>
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