PHP写的加密函数,支持私人密钥(详细介绍)
2024-05-04 22:26:09
供稿：网友
在开发PHP系统时,会员部分往往是一个必不可少的模块,而密码的处理又是不得不面对的问题,PHP 的 Mcrypt 加密库又需要额外设置,很多人都是直接使用md5()函数加密,这个方法的确安全,但是因为md5是不可逆加密,无法还原密码,因此也有一些不便之处,本文介绍加密函数支持私钥,用起来还是不错的.
代码如下:
PHP:
代码如下:
<ol><li class="li1"><div class="de1"> </div>
</li>
<li class="li1"><div class="de1"><span class="kw2"><?php</span>
</div>
</li>
<li class="li1"><div class="de1"><span class="co1">// 说明：PHP 写的加密函数,支持私人密钥 </span>
</div>
</li>
<li class="li1"><div class="de1"><span class="co1">// 整理：//www.Vevb.com </span>
</div>
</li>
<li class="li2"><div class="de2"> </div>
</li>
<li class="li1"><div class="de1"><span class="kw2">function</span>
keyED<span class="br0">(</span>
<span class="re0">$txt</span>
,<span class="re0">$encrypt_key</span>
<span class="br0">)</span>
</div>
</li>
<li class="li1"><div class="de1"><span class="br0">{</span>
</div>
</li>
<li class="li1"><div class="de1"> <span class="re0">$encrypt_key</span>
= <span class="kw3">md5</span>
<span class="br0">(</span>
<span class="re0">$encrypt_key</span>
<span class="br0">)</span>
; </div>
</li>
<li class="li1"><div class="de1"> <span class="re0">$ctr</span>
=<span class="nu0">0</span>
; </div>
</li>
<li class="li2"><div class="de2"> <span class="re0">$tmp</span>
= <span class="st0">""</span>
; </div>
</li>
<li class="li1"><div class="de1"> <span class="kw1">for</span>
<span class="br0">(</span>
<span class="re0">$i</span>
=<span class="nu0">0</span>
;<span class="re0">$i</span>
<strlen<span class="br0">(</span>
<span class="re0">$txt</span>
<span class="br0">)</span>
;<span class="re0">$i</span>
++<span class="br0">)</span>
</div>
</li>
<li class="li1"><div class="de1"> <span class="br0">{</span>
</div>
</li>
<li class="li1"><div class="de1"> <span class="kw1">if</span>
