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服务器数据库的搭建和远程访问

mysql数据库安装（详细）

window安装mysql详细流程

路程：重设MySQL5密码，发现远程服务器原本有一个MySQL5，尝试在服务器本地建立连接被拒绝，因为不知道密码。
（1）注意mysql服务名：否则会报错服务名无效。

（2）MySQL5输入指令跳过密码验证时报错：

mysqld --skip-grant-tables

安装MySQL的时候报这个错误，由于找不到 VCRUNTIME140_1.dll，无法继续执行代码，重新安装程序可能会解决此问题。
解决：根据文章，下载安装Visual C++ 2015-2019 Redistributable，双击。
（我看到有人将这个文件拷贝到mysql/bin 目录下，再次执行。怀疑是mysql目录下缺失这个文件导致的。我这样做了之后，远程服务器崩溃了黑屏了，哈哈哈哈哈，我真哈哈哈，被带去机房重启服务器了，然后被要求换了个服务器安装，那个远程服务器有正常的MySQL，可惜了，没法折腾了~~，好吧今日闯祸到此为止…未来可期）

续：
服务器mysql5连不上，应该是密码的问题，问题是不知道密码
（问题是配置文件ini修改了还是不能通过mysqld --skip-grant-tables指令跳过输入密码）

这个博主好厉害啊啊啊啊，通过Navicat连接过数据库，查历史记录来解密
https://www.cnblogs.com/BKYhailong/p/18080385

在线PHP解密工具换这个，真能解

<?php
namespace FatSmallTools;
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, $this->aesIv);}
}use FatSmallTools\NavicatPassword;//需要指定版本，11或12//$navicatPassword = new NavicatPassword(12);$navicatPassword = new NavicatPassword(11);//解密
$decode = $navicatPassword->decrypt('15057D7BA390');
echo $decode."\n";