此教程的背景：数据库密码忘记了，但是在Navicat连接过且目前能连接上的状态！

1.导出数据库连接 connections.ncx 文件

选择你要导出密码的数据库连接，切记要勾上导出密码

2.使用文本编辑工具打开导出的connections.ncx 文件

找到Password=""，将双引号中间的密码复制出来使用下面的Java程序或PHP程序进行解密！

3.使用Java程序进行解密

Java在线运行环境：菜鸟教程在线编辑器，将以下代码复制到在线运行环境中并把代码中的密码替换为你自己connections.ncx文件中的密码运行即可！

import javax.crypto.Cipher;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import java.security.MessageDigest;import java.util.Arrays;/*** 以下程序均为ChatGPT生成* @Author: 木芒果*/public class NavicatPassword {public static void main(String[] args) throws Exception {NavicatPassword navicatPassword = new NavicatPassword();// 解密11版本及以前的密码//String decode = navicatPassword.decrypt("15057D7BA390", 11);// 解密12版本及以后的密码//String decode = navicatPassword.decrypt("15057D7BA390", 12);String decode = navicatPassword.decrypt("解密密码", 12);System.out.println(decode);}private static final String AES_KEY = "libcckeylibcckey";private static final String AES_IV = "libcciv libcciv ";private static final String BLOW_KEY = "3DC5CA39";private static final String BLOW_IV = "d9c7c3c8870d64bd";public static String encrypt(String plaintext, int version) throws Exception {switch (version) {case 11:return encryptEleven(plaintext);case 12:return encryptTwelve(plaintext);default:throw new IllegalArgumentException("Unsupported version");}}public static String decrypt(String ciphertext, int version) throws Exception {switch (version) {case 11:return decryptEleven(ciphertext);case 12:return decryptTwelve(ciphertext);default:throw new IllegalArgumentException("Unsupported version");}}private static String encryptEleven(String plaintext) throws Exception {byte[] iv = hexStringToByteArray(BLOW_IV);byte[] key = hashToBytes(BLOW_KEY);int round = plaintext.length() / 8;int leftLength = plaintext.length() % 8;StringBuilder result = new StringBuilder();byte[] currentVector = iv.clone();Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");SecretKeySpec secretKeySpec = new SecretKeySpec(key, "Blowfish");cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);for (int i = 0; i < round; i++) {byte[] block = xorBytes(plaintext.substring(i * 8, (i + 1) * 8).getBytes(), currentVector);byte[] temp = cipher.doFinal(block);currentVector = xorBytes(currentVector, temp);result.append(bytesToHex(temp));}if (leftLength > 0) {currentVector = cipher.doFinal(currentVector);byte[] block = xorBytes(plaintext.substring(round * 8).getBytes(), currentVector);result.append(bytesToHex(block));}return result.toString().toUpperCase();}private static String encryptTwelve(String plaintext) throws Exception {byte[] iv = AES_IV.getBytes();byte[] key = AES_KEY.getBytes();Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);byte[] result = cipher.doFinal(plaintext.getBytes());return bytesToHex(result).toUpperCase();}private static String decryptEleven(String ciphertext) throws Exception {byte[] iv = hexStringToByteArray(BLOW_IV);byte[] key = hashToBytes(BLOW_KEY);byte[] encrypted = hexStringToByteArray(ciphertext.toLowerCase());int round = encrypted.length / 8;int leftLength = encrypted.length % 8;StringBuilder result = new StringBuilder();byte[] currentVector = iv.clone();Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");SecretKeySpec secretKeySpec = new SecretKeySpec(key, "Blowfish");cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);for (int i = 0; i < round; i++) {byte[] block = Arrays.copyOfRange(encrypted, i * 8, (i + 1) * 8);byte[] temp = xorBytes(cipher.doFinal(block), currentVector);currentVector = xorBytes(currentVector, block);result.append(new String(temp));}if (leftLength > 0) {currentVector = cipher.doFinal(currentVector);byte[] block = Arrays.copyOfRange(encrypted, round * 8, round * 8 + leftLength);result.append(new String(xorBytes(block, currentVector)));}return result.toString();}private static String decryptTwelve(String ciphertext) throws Exception {byte[] iv = AES_IV.getBytes();byte[] key = AES_KEY.getBytes();byte[] encrypted = hexStringToByteArray(ciphertext.toLowerCase());Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec);byte[] result = cipher.doFinal(encrypted);return new String(result);}private static byte[] xorBytes(byte[] bytes1, byte[] bytes2) {byte[] result = new byte[bytes1.length];for (int i = 0; i < bytes1.length; i++) {result[i] = (byte) (bytes1[i] ^ bytes2[i]);}return result;}private static byte[] hexStringToByteArray(String s) {int len = s.length();byte[] data = new byte[len / 2];for (int i = 0; i < len; i += 2) {data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)+ Character.digit(s.charAt(i + 1), 16));}return data;}private static byte[] hashToBytes(String s) throws Exception {return MessageDigest.getInstance("SHA-1").digest(s.getBytes());}private static String bytesToHex(byte[] bytes) {StringBuilder result = new StringBuilder();for (byte b : bytes) {result.append(String.format("%02X", b));}return result.toString();}}

4.使用PHP程序进行解密

PHP在线运行环境：代码在线运行 - 在线工具，将以下代码复制到在线运行环境中并把代码中的密码替换为你自己connections.ncx文件中的密码运行即可！

<?phpnamespace 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 = $navicatPassword->decrypt('15057D7BA390');$decode = $navicatPassword->decrypt('解密密码');echo $decode."\n";