服務器數據庫的搭建和遠程訪問

mysql數據庫安裝（詳細）

window安裝mysql詳細流程

路程：重設MySQL5密碼，發現遠程服務器原本有一個MySQL5，嘗試在服務器本地建立連接被拒絕，因為不知道密碼。
（1）注意mysql服務名：否則會報錯服務名無效。

（2）MySQL5輸入指令跳過密碼驗證時報錯：

mysqld --skip-grant-tables

安裝MySQL的時候報這個錯誤，由于找不到 VCRUNTIME140_1.dll，無法繼續執行代碼，重新安裝程序可能會解決此問題。
解決：根據文章，下載安裝Visual C++ 2015-2019 Redistributable，雙擊。
（我看到有人將這個文件拷貝到mysql/bin 目錄下，再次執行。懷疑是mysql目錄下缺失這個文件導致的。我這樣做了之后，遠程服務器崩潰了黑屏了，哈哈哈哈哈，我真哈哈哈，被帶去機房重啟服務器了，然后被要求換了個服務器安裝，那個遠程服務器有正常的MySQL，可惜了，沒法折騰了~~，好吧今日闖禍到此為止…未來可期）

續：
服務器mysql5連不上，應該是密碼的問題，問題是不知道密碼
（問題是配置文件ini修改了還是不能通過mysqld --skip-grant-tables指令跳過輸入密碼）

這個博主好厲害啊啊啊啊，通過Navicat連接過數據庫，查歷史記錄來解密
https://www.cnblogs.com/BKYhailong/p/18080385

在線PHP解密工具換這個，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";