一、序

不知道大家有没有这样的经历？我们经常使用navicat连接数据库，有时候时间久了之后，会忘记之前的密码，但是我们却又不能看到它，那个焦灼的心情啊～那么现在我就带大家一起来解密数据库的密码。

二、实战

首先我们需要导出连接：

选择你需要导出的连接并勾选密码：

导出的文件是以ncx后缀结尾，用编辑器打开，找到Password一段内容：

接下来就要开始解密了，为了大家都能实践，直接在线处理，我们打开连接：

https://tool.lu/coderunner

复制如下代码：

<?php
class NavicatPassword
{
    protected $version = 0;
    protected $aesKey = 'libcckeylibcckey';
    protected $aesIv = 'libcciv libcciv ';
    protected $blowString = '3DC5CA39';
    protected $blowKey = null;
    protected $blowIv = null;
     
    public function __construct($version = 12)
{
        $this->version = $version;
        $this->blowKey = sha1('3DC5CA39', true);
        $this->blowIv = hex2bin('d9c7c3c8870d64bd');
    }
     
    public function encrypt($string)
{
        $result = FALSE;
        switch ($this->version) {
            case 11:
                $result = $this->encryptEleven($string);
                break;
            case 12:
                $result = $this->encryptTwelve($string);
                break;
            default:
                break;
        }
         
        return $result;
    }
     
    protected function encryptEleven($string)
{
        $round = intval(floor(strlen($string) / 8));
        $leftLength = strlen($string) % 8;
        $result = '';
        $currentVector = $this->blowIv;
         
        for ($i = 0; $i < $round; $i++) {
            $temp = $this->encryptBlock($this->xorBytes(substr($string, 8 * $i, 8), $currentVector));
            $currentVector = $this->xorBytes($currentVector, $temp);
            $result .= $temp;
        }
         
        if ($leftLength) {
            $currentVector = $this->encryptBlock($currentVector);
            $result .= $this->xorBytes(substr($string, 8 * $i, $leftLength), $currentVector);
        }
         
        return strtoupper(bin2hex($result));
    }
     
    protected function encryptBlock($block)
{
        return openssl_encrypt($block, 'BF-ECB', $this->blowKey, OPENSSL_RAW_DATA|OPENSSL_NO_PADDING);
    }
     
    protected function decryptBlock($block)
{
        return openssl_decrypt($block, 'BF-ECB', $this->blowKey, OPENSSL_RAW_DATA|OPENSSL_NO_PADDING);
    }
     
    protected function xorBytes($str1, $str2)
{
        $result = '';
        for ($i = 0; $i < strlen($str1); $i++) {
            $result .= chr(ord($str1[$i]) ^ ord($str2[$i]));
        }
         
        return $result;
    }
     
    protected function encryptTwelve($string)
{
        $result = openssl_encrypt($string, 'AES-128-CBC', $this->aesKey, OPENSSL_RAW_DATA, $this->aesIv);
        return strtoupper(bin2hex($result));
    }
     
    public function decrypt($string)
{
        $result = FALSE;
        switch ($this->version) {
            case 11:
                $result = $this->decryptEleven($string);
                break;
            case 12:
                $result = $this->decryptTwelve($string);
                break;
            default:
                break;
        }
         
        return $result;
    }
     
    protected function decryptEleven($upperString)
{
        $string = hex2bin(strtolower($upperString));
         
        $round = intval(floor(strlen($string) / 8));
        $leftLength = strlen($string) % 8;
        $result = '';
        $currentVector = $this->blowIv;
         
        for ($i = 0; $i < $round; $i++) {
            $encryptedBlock = substr($string, 8 * $i, 8);
            $temp = $this->xorBytes($this->decryptBlock($encryptedBlock), $currentVector);
            $currentVector = $this->xorBytes($currentVector, $encryptedBlock);
            $result .= $temp;
        }
         
        if ($leftLength) {
            $currentVector = $this->encryptBlock($currentVector);
            $result .= $this->xorBytes(substr($string, 8 * $i, $leftLength), $currentVector);
        }
         
        return $result;
    }
     
    protected function decryptTwelve($upperString)
{
        $string = hex2bin(strtolower($upperString));
        return openssl_decrypt($string, 'AES-128-CBC', $this->aesKey, OPENSSL_RAW_DATA, $this->aesIv);
    }
};


//需要指定版本两种，11或12
//$navicatPassword = new NavicatPassword(11);
$navicatPassword = new NavicatPassword(12);

//解密
//$decode = $navicatPassword->decrypt('15057D7BA390');
$decode = $navicatPassword->decrypt('E75BF077AB8BAA3AC2D5');
echo $decode."\n";
?>

把上面的Password替换成自己的即可。

最后在线run一下。有个注意点，navicat的不同版本，我本地装的是12，所以选择填的是12.

最后就是见证奇迹的时刻了，我们点击run按钮，看下效果：

完美，非常方便、快速的获取到了密码。

三、总结

今天主要是分享了一个小工具给大家，在工作中可能用不到，但用到时却非常着急人的小技巧。希望能够帮助到你。

欢迎关注