FinalShell密码找回/破解

大概是这么一回事，我打算更换SSH的软件，从FinalShell到Tabby(非常推荐)，不幸的是有一个服务器的密码忘了，也懒得重置密码，就百度了一下，问题就解决了，顺便水一篇保姆级教学文章

目标文件

C:\Users\你的用户名\AppData\Local\finalshell\conn

打开此文件夹

如果你有多个连接就会长成这个样子

想要定位要破解密码的连接很简单，仅需要在FinalShell中编辑连接的名称，然后在在此目录下观察修改日期即可定位到目标文件

获得加密的密码

打开目标文件

如果你使用VSC打开它，你会发现它像依托答辩，挤在一起，我建议你使用Shift+Alt+F格式化文档，保护一下眼睛

找到password一项，复制类似于++ZhArRz4sJ34QzFZkcDQ7S5GG32tl5xmf++这依托，这位就是已加密的密码

解密

然后把下面代码中的++ZhArRz4sJ34QzFZkcDQ7S5GG32tl5xmf++需要换成你的password的值

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Base64;
import java.util.Random;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class FinalShellDecodePass {
    public static void main(String[] args)throws Exception {
        System.out.println(decodePass("ZhArRz4sJ34QzFZkcDQ7S5GG32tl5xmf"));
    }
    public static byte[] desDecode(byte[] data, byte[] head) throws Exception {
        SecureRandom sr = new SecureRandom();
        DESKeySpec dks = new DESKeySpec(head);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey securekey = keyFactory.generateSecret(dks);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(2, securekey, sr);
        return cipher.doFinal(data);
    }
    public static String decodePass(String data) throws Exception {
        if (data == null) {
            return null;
        } else {
            String rs = "";
            byte[] buf = Base64.getDecoder().decode(data);
            byte[] head = new byte[8];
            System.arraycopy(buf, 0, head, 0, head.length);
            byte[] d = new byte[buf.length - head.length];
            System.arraycopy(buf, head.length, d, 0, d.length);
            byte[] bt = desDecode(d, ranDomKey(head));
            rs = new String(bt);

            return rs;
        }
    }
    static byte[] ranDomKey(byte[] head) {
        long ks = 3680984568597093857L / (long)(new Random((long)head[5])).nextInt(127);
        Random random = new Random(ks);
        int t = head[0];

        for(int i = 0; i < t; ++i) {
            random.nextLong();
        }

        long n = random.nextLong();
        Random r2 = new Random(n);
        long[] ld = new long[]{(long)head[4], r2.nextLong(), (long)head[7], (long)head[3], r2.nextLong(), (long)head[1], random.nextLong(), (long)head[2]};
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(bos);
        long[] var15 = ld;
        int var14 = ld.length;

        for(int var13 = 0; var13 < var14; ++var13) {
            long l = var15[var13];

            try {
                dos.writeLong(l);
            } catch (IOException var18) {
                var18.printStackTrace();
            }
        }

        try {
            dos.close();
        } catch (IOException var17) {
            var17.printStackTrace();
        }

        byte[] keyData = bos.toByteArray();
        keyData = md5(keyData);
        return keyData;
    }
    public static byte[] md5(byte[] data) {
        String ret = null;
        byte[] res=null;

        try {
            MessageDigest m;
            m = MessageDigest.getInstance("MD5");
            m.update(data, 0, data.length);
            res=m.digest();
            ret = new BigInteger(1, res).toString(16);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return res;
    }
}

然后Java运行一下，什么？不知道咋运行，对哦，这是保姆式教程，那就把修改好的代码复制到这里(点我)，看到这个网页的点击运行按钮了吗，点它，你的密码就会出现在屏幕右侧了