解密Navicat密码（Java）

最近从Navicat换到了DBeaver，导出配置文件发现配置文件里的密码都是加密的，看网上的都是给的PHP代码，因为环境问题，就算是在线上运行的PHP代码也会报错，所以就把这段代码改成Java了。

package com.unicdata.system.controller.marketing;/**
 * @Author: PengShangXing
 * @Date: 2025/01/07/0007 15:13
 */

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Arrays;

/**
 * @Author: PengShangXing
 * @Date: 2025/01/07/0007 15:13
 */
public class NavicatPassword {

    private int version = 0;
    private final String aesKey = "libcckeylibcckey";
    private final String aesIv = "libcciv libcciv ";
    private final String blowString = "3DC5CA39";
    private byte[] blowKey;
    private byte[] blowIv;

    public NavicatPassword(int version) {
        this.version = version;
        this.blowKey = sha1("3DC5CA39");
        this.blowIv = hexToBytes("d9c7c3c8870d64bd");
    }

    public String encrypt(String string) throws Exception {
        String result = null;
        switch (this.version) {
            case 11:
                result = encryptEleven(string);
                break;
            case 12:
                result = encryptTwelve(string);
                break;
            default:
                break;
        }
        return result;
    }

    private String encryptEleven(String string) throws Exception {
        int round = string.length() / 8;
        int leftLength = string.length() % 8;
        StringBuilder result = new StringBuilder();
        byte[] currentVector = blowIv;

        for (int i = 0; i < round; i++) {
            byte[] temp = encryptBlock(xorBytes(string.substring(8 * i, 8 * (i + 1)).getBytes(), currentVector));
            currentVector = xorBytes(currentVector, temp);
            result.append(bytesToHex(temp));
        }

        if (leftLength > 0) {
            currentVector = encryptBlock(currentVector);
            result.append(bytesToHex(xorBytes(string.substring(8 * round).getBytes(), currentVector)));
        }

        return result.toString().toUpperCase();
    }

    private byte[] encryptBlock(byte[] block) throws Exception {
        Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");
        SecretKeySpec keySpec = new SecretKeySpec(blowKey, "Blowfish");
        cipher.init(Cipher.ENCRYPT_MODE, keySpec);
        return cipher.doFinal(block);
    }

    private byte[] decryptBlock(byte[] block) throws Exception {
        Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");
        SecretKeySpec keySpec = new SecretKeySpec(blowKey, "Blowfish");
        cipher.init(Cipher.DECRYPT_MODE, keySpec);
        return cipher.doFinal(block);
    }

    private String encryptTwelve(String string) throws Exception {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        SecretKeySpec keySpec = new SecretKeySpec(aesKey.getBytes(), "AES");
        IvParameterSpec ivSpec = new IvParameterSpec(aesIv.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
        byte[] encrypted = cipher.doFinal(string.getBytes());
        return bytesToHex(encrypted).toUpperCase();
    }

    public String decrypt(String string) throws Exception {
        String result = null;
        switch (this.version) {
            case 11:
                result = decryptEleven(string);
                break;
            case 12:
                result = decryptTwelve(string);
                break;
            default:
                break;
        }
        return result;
    }

    private String decryptEleven(String upperString) throws Exception {
        byte[] string = hexToBytes(upperString.toLowerCase());
        int round = string.length / 8;
        int leftLength = string.length % 8;
        StringBuilder result = new StringBuilder();
        byte[] currentVector = blowIv;

        for (int i = 0; i < round; i++) {
            byte[] encryptedBlock = Arrays.copyOfRange(string, 8 * i, 8 * (i + 1));
            byte[] temp = xorBytes(decryptBlock(encryptedBlock), currentVector);
            currentVector = xorBytes(currentVector, encryptedBlock);
            result.append(new String(temp));
        }

        if (leftLength > 0) {
            currentVector = encryptBlock(currentVector);
            result.append(new String(xorBytes(Arrays.copyOfRange(string, 8 * round, string.length), currentVector)));
        }

        return result.toString();
    }

    private String decryptTwelve(String upperString) throws Exception {
        // 将十六进制字符串转换为字节数组
        byte[] string = hexToBytes(upperString.toLowerCase());

        // 初始化AES解密
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        SecretKeySpec keySpec = new SecretKeySpec(aesKey.getBytes("UTF-8"), "AES");
        IvParameterSpec ivSpec = new IvParameterSpec(aesIv.getBytes("UTF-8"));
        cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);

        // 解密并按照UTF-8编码返回字符串
        return new String(cipher.doFinal(string), "UTF-8");
    }

    private byte[] xorBytes(byte[] str1, byte[] str2) {
        byte[] result = new byte[str1.length];
        for (int i = 0; i < str1.length; i++) {
            result[i] = (byte) (str1[i] ^ str2[i]);
        }
        return result;
    }

    private byte[] sha1(String input) {
        try {
            java.security.MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
            return digest.digest(input.getBytes());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private byte[] hexToBytes(String hex) {
        int len = hex.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) ((Character.digit(hex.charAt(i), 16) << 4)
                    + Character.digit(hex.charAt(i + 1), 16));
        }
        return data;
    }

    private String bytesToHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            sb.append(String.format("%02x", b));
        }
        return sb.toString();
    }

    public static void main(String[] args) throws Exception {
        // Example usage
        NavicatPassword navicatPassword = new NavicatPassword(12);

        // Decrypt
        String decode = navicatPassword.decrypt("xxxxx");
        System.out.println(decode);
    }

}