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      <small><time class="date dt-published" datetime="2020-05-29T00:00:00+08:00">29 May 2020</time> - 字数统计：4777 - 阅读大约需要16分钟 - Hits: <span id="/2020/05/29/encrypt.html" class="visitors">Loading...</span></small>
<h1 class="p-name">写一个加密传输的Demo</h1>

<p class="view">by <a class="p-author h-card" href="//github.com/Mabbs">mayx</a></p>
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<b>AI摘要</b>
<p id="ai-output">这篇文章是一个关于非专业密码学的Python实现示例，作者是为了一个学校工程项目研究通信安全而写的简化的加密传输Demo。主要使用AES用于数据加密，RSA用于加密AES的密钥，以及MD5进行数据校验。作者选择这些技术主要是为了保证通信过程中的安全性，虽然简化了RSA和TLS的握手过程以降低复杂性。传输方式则是通过文件而非TCP或Unix Domain Socket。虽然许多代码是从网上获取的，但文章展示了如何使用Python的Crypto库进行加密和解密操作。</p>

<hr />



<ul><li><a href="#起因">起因</a></li><li><a href="#实现思路">实现思路</a></li><li><a href="#代码">代码</a><ul><li><a href="#serverpy">server.py</a></li><li><a href="#clientpy">client.py</a></li></ul></li><li><a href="#感想">感想</a></li></ul>
<hr />


 <main class="post-content e-content" role="main"><p>非专业密码学，仅供娱乐！<!--more--></p>
<h1 id="起因">
  
  
    <a href="#起因"><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> 起因
  
  
</h1>
    
<p>最近我们学校搞了一个工程项目，要求是研究关于信息安全等级保护的一些东西，一开始我以为这就是搞个权限啥的，后来发现和云计算一样是个定义，话说我明明是网络工程专业的为啥还要了解信息安全…… </p><p>
  当然这个什么等级保护的内容很多，我们不可能全都涉及，所以老师允许我们只选其中的一部分进行研究。我想了想，我之前还想搞什么<a href="/2019/07/02/encmail.html">加密邮件</a>啥的，所以我选了通信安全方面的板块，这样也可以对那个项目有些参考。</p>
<h1 id="实现思路">
  
  
    <a href="#实现思路"><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> 实现思路
  
  
</h1>
    
<p>我本来是想按着TLS的标准来写，后来看了看发现那样不太方便，我写Demo也就是玩玩而已，不用费那么大劲。 </p><p>
  像正常来说，建立加密通道是要有握手环节的，但是那个实现起来实在是太麻烦，所以想了想就算了。  </p><p>
  所以我的实现方式是生成一个随机数，用AES以随机数为密码加密数据，用RSA加密随机数。这样做的主要目的是利用RSA的特性保证传输内容不会被泄露，但是RSA相对来说太慢，所以用了AES来加密数据，这样就能提高传输的效率。 </p><p>
  传送方式我之前还想着要不要建一个TCP Socket或者是Unix Domain Socket来传输，但是后来觉得这样太麻烦，不如直接用文件的方式传，这样还简单好理解。 <del>（就是嫌麻烦嘛）</del> </p><p>
  另外在通信安全中还有一点是要求校验数据，我想了想就用MD5吧，正常来说得到MD5后还要数字签名啥的，我觉得麻烦也就没搞，所以最终传输的内容就是AES加密后的数据、原数据的MD5(Hash)以及用RSA加密的密钥。 </p><p>
  虽然我学Python的时间不长，不过我现在发现Python在做这些事情的时候远比Shell、PHP和JS简单，所以这次的Demo也是用Python实现的。 </p><p>
  不过我的Python并不怎么样，所以大多数代码都是从网上Copy的，像Crypto的库我不搜一下肯定是不会用嘛。 </p><p>
  既然用到了Crypto库，那么如果有人有兴趣执行下面的代码，自然需要执行一下<code class="language-plaintext highlighter-rouge">pip3 install pycryptodome</code>才可以正常运行啦。</p>
<h1 id="代码">
  
  
    <a href="#代码"><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> 代码
  
  
</h1>
    
<h2 id="serverpy">
  
  
    <a href="#serverpy"><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> server.py
  
  
</h2>
    
<div class="language-python highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># -*- coding: utf-8 -*-
</span>
<span class="kn">from</span> <span class="nn">Crypto.PublicKey</span> <span class="kn">import</span> <span class="n">RSA</span>
<span class="kn">from</span> <span class="nn">Crypto.Cipher</span> <span class="kn">import</span> <span class="n">PKCS1_v1_5</span>
<span class="kn">from</span> <span class="nn">Crypto.Cipher</span> <span class="kn">import</span> <span class="n">AES</span>  
<span class="kn">import</span> <span class="nn">base64</span>
<span class="kn">import</span> <span class="nn">hashlib</span>
<span class="kn">import</span> <span class="nn">json</span>

<span class="n">private_key</span> <span class="o">=</span> <span class="s">"""-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQDfEQ82qUrto7h4BL3TsA/DFXSdM44cbeY4kPccD7gLGhaZRClz
YKIh5zYdfjBGF+0HXfMa1u9b7GNs2AjVIsx8Kx0QLnMfmtkmGWGhOXz/9IDLKJOx
0weKv61gysKItgzVKn2mbLool4R/PQBc3AjDyHw+io1KpVz+3kRTaGs1fQIDAQAB
AoGAWB4kFWLA/6k6OOcemd4mC9mQ7HyuOdrMJDJX+5TWDkSrArajbTmSMrRkczgj
F71h3BQn8cVQXs695ARfUNrjTbi2Y0LjN7ScK7ExzTLdoMEFw5JsHggJZ0zBQY6w
mwOdGfqzA6tZPXgkn+jqEha+CD6GrwnTM1oDGJC/aKG2OmECQQDkO9IhUhFc/PSU
0zvGE6AOcqk5wlOuvMg+oAFHJHJZ9XW7+X/Nx0ZoVDFq/cZQj+46t+fiwUwhdW7l
IfCvNGKFAkEA+jRQmWGKrbf1ns4S0SezJvysd5O6otRGJXr+Ex2uDhc39ZTeUsyg
kjrLhp8STLMOmql+8g5fghct17EuCX1EmQJBAJz9BNnEkIrst/OSpH/nyeWGOx6u
q077LaXd+2MLD9kO/O/Se3V5B9YFa4STkJCjoBMloswXd51gIGpdgSeSmd0CQQCL
PrwwcGmWfo+ynqs4PajlpK9zKQMwhYS4bTejedwZOXDKOtx0Ji+i0hfcxwCPMQOK
rZPZsIgUxUOdC508aLvZAkBDkHxunCzDm0w4DdTUN7S9YSpVvQEjK/xUQiWaKV12
8QgskhU2DNdYK2NxifnWrKtx3uQmqMxX5aLuJZ4493yr
-----END RSA PRIVATE KEY-----"""</span>

<span class="c1"># 公钥解密
</span><span class="k">def</span> <span class="nf">rsa_decode</span><span class="p">(</span><span class="n">cipher_text</span><span class="p">,</span> <span class="n">private_key</span><span class="p">):</span>
    <span class="n">rsakey</span> <span class="o">=</span> <span class="n">RSA</span><span class="p">.</span><span class="n">importKey</span><span class="p">(</span><span class="n">private_key</span><span class="p">)</span>  <span class="c1"># 导入读取到的私钥
</span>    <span class="n">cipher</span> <span class="o">=</span> <span class="n">PKCS1_v1_5</span><span class="p">.</span><span class="n">new</span><span class="p">(</span><span class="n">rsakey</span><span class="p">)</span>  <span class="c1"># 生成对象
</span>    <span class="c1"># 将密文解密成明文，返回的是一个bytes类型数据，需要自己转换成str
</span>    <span class="n">text</span> <span class="o">=</span> <span class="n">cipher</span><span class="p">.</span><span class="n">decrypt</span><span class="p">(</span><span class="n">base64</span><span class="p">.</span><span class="n">b64decode</span><span class="p">(</span><span class="n">cipher_text</span><span class="p">),</span> <span class="s">"ERROR"</span><span class="p">)</span>
    <span class="k">return</span> <span class="n">text</span><span class="p">.</span><span class="n">decode</span><span class="p">()</span>
    
<span class="k">class</span> <span class="nc">PrpCrypt</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
 
    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
        <span class="bp">self</span><span class="p">.</span><span class="n">key</span> <span class="o">=</span> <span class="n">key</span><span class="p">.</span><span class="n">encode</span><span class="p">(</span><span class="s">'utf-8'</span><span class="p">)</span>
        <span class="bp">self</span><span class="p">.</span><span class="n">mode</span> <span class="o">=</span> <span class="n">AES</span><span class="p">.</span><span class="n">MODE_CBC</span>

 
    <span class="c1"># 解密后，去掉补足的空格用strip() 去掉
</span>    <span class="k">def</span> <span class="nf">decrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">text</span><span class="p">):</span>
        <span class="n">cryptor</span> <span class="o">=</span> <span class="n">AES</span><span class="p">.</span><span class="n">new</span><span class="p">(</span><span class="bp">self</span><span class="p">.</span><span class="n">key</span><span class="p">,</span> <span class="bp">self</span><span class="p">.</span><span class="n">mode</span><span class="p">,</span> <span class="sa">b</span><span class="s">'0000000000000000'</span><span class="p">)</span>
        <span class="n">plain_text</span> <span class="o">=</span> <span class="n">cryptor</span><span class="p">.</span><span class="n">decrypt</span><span class="p">(</span><span class="n">base64</span><span class="p">.</span><span class="n">b64decode</span><span class="p">(</span><span class="n">text</span><span class="p">))</span>
        <span class="c1"># return plain_text.rstrip('\0')
</span>        <span class="k">return</span> <span class="nb">bytes</span><span class="p">.</span><span class="n">decode</span><span class="p">(</span><span class="n">plain_text</span><span class="p">).</span><span class="n">rstrip</span><span class="p">(</span><span class="s">'</span><span class="se">\0</span><span class="s">'</span><span class="p">)</span>

<span class="k">while</span> <span class="ow">not</span> <span class="nb">input</span><span class="p">(</span><span class="s">"按回车读取客户端的信息，输入其他内容结束"</span><span class="p">):</span>
    <span class="n">cipher</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="s">"pipe.txt"</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="s">'r'</span><span class="p">)</span>
    <span class="n">msg</span> <span class="o">=</span> <span class="n">json</span><span class="p">.</span><span class="n">loads</span><span class="p">(</span><span class="n">cipher</span><span class="p">.</span><span class="n">read</span><span class="p">())</span>
    <span class="n">cipher</span><span class="p">.</span><span class="n">close</span><span class="p">()</span>
    <span class="n">key</span> <span class="o">=</span> <span class="n">rsa_decode</span><span class="p">(</span><span class="n">msg</span><span class="p">[</span><span class="s">"key"</span><span class="p">],</span> <span class="n">private_key</span><span class="p">)</span>
    <span class="n">aesc</span> <span class="o">=</span> <span class="n">PrpCrypt</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
    <span class="n">message</span> <span class="o">=</span> <span class="n">aesc</span><span class="p">.</span><span class="n">decrypt</span><span class="p">(</span><span class="n">msg</span><span class="p">[</span><span class="s">"message"</span><span class="p">])</span>
    <span class="nb">hash</span> <span class="o">=</span> <span class="n">hashlib</span><span class="p">.</span><span class="n">md5</span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">encode</span><span class="p">(</span><span class="n">encoding</span><span class="o">=</span><span class="s">'UTF-8'</span><span class="p">)).</span><span class="n">hexdigest</span><span class="p">()</span>
    <span class="k">if</span> <span class="nb">hash</span> <span class="o">==</span> <span class="n">msg</span><span class="p">[</span><span class="s">"hash"</span><span class="p">]:</span>
        <span class="k">print</span><span class="p">(</span><span class="s">"数据校验成功"</span><span class="p">)</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="k">print</span><span class="p">(</span><span class="s">"数据校验失败"</span><span class="p">)</span>
    <span class="k">print</span><span class="p">(</span><span class="n">message</span><span class="p">)</span>
</code></pre></div></div>
<h2 id="clientpy">
  
  
    <a href="#clientpy"><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> client.py
  
  
</h2>
    
<div class="language-python highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># -*- coding: utf-8 -*-
</span>
<span class="kn">import</span> <span class="nn">random</span>
<span class="kn">from</span> <span class="nn">Crypto.PublicKey</span> <span class="kn">import</span> <span class="n">RSA</span>
<span class="kn">from</span> <span class="nn">Crypto.Cipher</span> <span class="kn">import</span> <span class="n">PKCS1_v1_5</span>
<span class="kn">from</span> <span class="nn">Crypto.Cipher</span> <span class="kn">import</span> <span class="n">AES</span>  
<span class="kn">import</span> <span class="nn">base64</span>
<span class="kn">import</span> <span class="nn">hashlib</span>
<span class="kn">import</span> <span class="nn">json</span>

<span class="n">public_key</span> <span class="o">=</span> <span class="s">"""-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDfEQ82qUrto7h4BL3TsA/DFXSd
M44cbeY4kPccD7gLGhaZRClzYKIh5zYdfjBGF+0HXfMa1u9b7GNs2AjVIsx8Kx0Q
LnMfmtkmGWGhOXz/9IDLKJOx0weKv61gysKItgzVKn2mbLool4R/PQBc3AjDyHw+
io1KpVz+3kRTaGs1fQIDAQAB
-----END PUBLIC KEY-----
"""</span>

<span class="c1"># 公钥加密
</span><span class="k">def</span> <span class="nf">rsa_encode</span><span class="p">(</span><span class="n">message</span><span class="p">,</span> <span class="n">public_key</span><span class="p">):</span>
    <span class="n">rsakey</span> <span class="o">=</span> <span class="n">RSA</span><span class="p">.</span><span class="n">importKey</span><span class="p">(</span><span class="n">public_key</span><span class="p">)</span>  <span class="c1"># 导入读取到的公钥
</span>    <span class="n">cipher</span> <span class="o">=</span> <span class="n">PKCS1_v1_5</span><span class="p">.</span><span class="n">new</span><span class="p">(</span><span class="n">rsakey</span><span class="p">)</span>  <span class="c1"># 生成对象
</span>    <span class="c1"># 通过生成的对象加密message明文，注意，在python3中加密的数据必须是bytes类型的数据，不能是str类型的数据
</span>    <span class="n">cipher_text</span> <span class="o">=</span> <span class="n">base64</span><span class="p">.</span><span class="n">b64encode</span><span class="p">(</span><span class="n">cipher</span><span class="p">.</span><span class="n">encrypt</span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">encode</span><span class="p">(</span><span class="n">encoding</span><span class="o">=</span><span class="s">"utf-8"</span><span class="p">)))</span>
    <span class="c1"># 公钥每次加密的结果不一样跟对数据的padding（填充）有关
</span>    <span class="k">return</span> <span class="n">cipher_text</span><span class="p">.</span><span class="n">decode</span><span class="p">()</span>

<span class="k">class</span> <span class="nc">PrpCrypt</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
 
    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
        <span class="bp">self</span><span class="p">.</span><span class="n">key</span> <span class="o">=</span> <span class="n">key</span><span class="p">.</span><span class="n">encode</span><span class="p">(</span><span class="s">'utf-8'</span><span class="p">)</span>
        <span class="bp">self</span><span class="p">.</span><span class="n">mode</span> <span class="o">=</span> <span class="n">AES</span><span class="p">.</span><span class="n">MODE_CBC</span>
 
    <span class="c1"># 加密函数，如果text不足16位就用空格补足为16位，
</span>    <span class="c1"># 如果大于16当时不是16的倍数，那就补足为16的倍数。
</span>    <span class="k">def</span> <span class="nf">encrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">text</span><span class="p">):</span>
        <span class="n">text</span> <span class="o">=</span> <span class="n">text</span><span class="p">.</span><span class="n">encode</span><span class="p">(</span><span class="s">'utf-8'</span><span class="p">)</span>
        <span class="n">cryptor</span> <span class="o">=</span> <span class="n">AES</span><span class="p">.</span><span class="n">new</span><span class="p">(</span><span class="bp">self</span><span class="p">.</span><span class="n">key</span><span class="p">,</span> <span class="bp">self</span><span class="p">.</span><span class="n">mode</span><span class="p">,</span> <span class="sa">b</span><span class="s">'0000000000000000'</span><span class="p">)</span>
        <span class="c1"># 这里密钥key 长度必须为16（AES-128）,
</span>        <span class="c1"># 24（AES-192）,或者32 （AES-256）Bytes 长度
</span>        <span class="c1"># 目前AES-128 足够目前使用
</span>        <span class="n">length</span> <span class="o">=</span> <span class="mi">16</span>
        <span class="n">count</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">text</span><span class="p">)</span>
        <span class="k">if</span> <span class="n">count</span> <span class="o">&lt;</span> <span class="n">length</span><span class="p">:</span>
            <span class="n">add</span> <span class="o">=</span> <span class="p">(</span><span class="n">length</span> <span class="o">-</span> <span class="n">count</span><span class="p">)</span>
            <span class="c1"># \0 backspace
</span>            <span class="c1"># text = text + ('\0' * add)
</span>            <span class="n">text</span> <span class="o">=</span> <span class="n">text</span> <span class="o">+</span> <span class="p">(</span><span class="s">'</span><span class="se">\0</span><span class="s">'</span> <span class="o">*</span> <span class="n">add</span><span class="p">).</span><span class="n">encode</span><span class="p">(</span><span class="s">'utf-8'</span><span class="p">)</span>
        <span class="k">elif</span> <span class="n">count</span> <span class="o">&gt;</span> <span class="n">length</span><span class="p">:</span>
            <span class="n">add</span> <span class="o">=</span> <span class="p">(</span><span class="n">length</span> <span class="o">-</span> <span class="p">(</span><span class="n">count</span> <span class="o">%</span> <span class="n">length</span><span class="p">))</span>
            <span class="c1"># text = text + ('\0' * add)
</span>            <span class="n">text</span> <span class="o">=</span> <span class="n">text</span> <span class="o">+</span> <span class="p">(</span><span class="s">'</span><span class="se">\0</span><span class="s">'</span> <span class="o">*</span> <span class="n">add</span><span class="p">).</span><span class="n">encode</span><span class="p">(</span><span class="s">'utf-8'</span><span class="p">)</span>
        <span class="bp">self</span><span class="p">.</span><span class="n">ciphertext</span> <span class="o">=</span> <span class="n">cryptor</span><span class="p">.</span><span class="n">encrypt</span><span class="p">(</span><span class="n">text</span><span class="p">)</span>
        <span class="c1"># 因为AES加密时候得到的字符串不一定是ascii字符集的，输出到终端或者保存时候可能存在问题
</span>        <span class="c1"># 所以这里统一把加密后的字符串转化为16进制字符串
</span>        <span class="k">return</span> <span class="n">base64</span><span class="p">.</span><span class="n">b64encode</span><span class="p">(</span><span class="bp">self</span><span class="p">.</span><span class="n">ciphertext</span><span class="p">)</span>
    
<span class="n">message</span><span class="o">=</span><span class="s">" "</span>
<span class="k">while</span> <span class="n">message</span><span class="p">:</span>
    <span class="n">message</span> <span class="o">=</span> <span class="nb">input</span><span class="p">(</span><span class="s">"请输入需要传输的信息（不输入则结束）："</span><span class="p">)</span>
    <span class="nb">hash</span> <span class="o">=</span> <span class="n">hashlib</span><span class="p">.</span><span class="n">md5</span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">encode</span><span class="p">(</span><span class="n">encoding</span><span class="o">=</span><span class="s">'UTF-8'</span><span class="p">)).</span><span class="n">hexdigest</span><span class="p">()</span>
    <span class="n">key</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">random</span><span class="p">.</span><span class="n">randint</span><span class="p">(</span><span class="mi">1000000000000000</span><span class="p">,</span><span class="mi">9999999999999999</span><span class="p">))</span>
    <span class="n">cipher</span> <span class="o">=</span> <span class="n">rsa_encode</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">public_key</span><span class="p">)</span>
    <span class="n">aesc</span> <span class="o">=</span> <span class="n">PrpCrypt</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
    <span class="n">data</span><span class="o">=</span><span class="n">json</span><span class="p">.</span><span class="n">dumps</span><span class="p">({</span><span class="s">"message"</span><span class="p">:</span><span class="n">aesc</span><span class="p">.</span><span class="n">encrypt</span><span class="p">(</span><span class="n">message</span><span class="p">).</span><span class="n">decode</span><span class="p">(</span><span class="s">'utf8'</span><span class="p">),</span><span class="s">"hash"</span><span class="p">:</span><span class="nb">hash</span><span class="p">,</span><span class="s">"key"</span><span class="p">:</span><span class="n">cipher</span><span class="p">})</span>
    <span class="k">print</span><span class="p">(</span><span class="n">data</span><span class="p">,</span><span class="nb">file</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="s">'pipe.txt'</span><span class="p">,</span><span class="s">'w'</span><span class="p">))</span>
    <span class="k">print</span><span class="p">(</span><span class="s">"数据已发出！"</span><span class="p">)</span>
</code></pre></div></div>
<h1 id="感想">
  
  
    <a href="#感想"><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> 感想
  
  
</h1>
    
<p>我在写这个代码的时候在网上搜到的资料也真的是算少了，就像我当时打算写加密邮件那时一样，基本上大多数的资料都有问题，像有些代码还是Python2的，还有时候经常遇到什么bytearray、json转换之类乱七八糟的问题。 </p><p>
  希望中文网络环境能多一些大家遇到的冷门知识的解决方法啊……  </p><p>
  对了，这个代码实际上只有防止中间人窥探信息的能力，并没有防篡改的能力，毕竟没有两端握手，没法做验证，所以这就是一个业余的加密传输代码，仅供参考。</p></main> 


<small style="display: block">tags: <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=Demo"><em>Demo</em></a> <span style="float: right;"><a href="https://gitlab.com/mayx/mayx.gitlab.io/tree/master/_posts/2020-05-29-encrypt.md">查看原始文件</a></span></small>


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