在finalshell连接服务器忘记密码，程序解析

最新推荐文章于 2024-11-30 23:13:17 发布

Xiaoxin_Java

最新推荐文章于 2024-11-30 23:13:17 发布

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分类专栏： springboot 文章标签： java json

本文链接：https://blog.youkuaiyun.com/Xiaoxin_Java/article/details/129517760

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该代码示例展示了如何使用Java进行MD5哈希运算以及DES加密解密过程。首先从JSON文件中获取密码值，然后利用MD5函数处理数据，接着通过DES算法进行解密操作，最终解码出原始密码。

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1.首先到finalshell安装目录中的conn文件夹中找到对应的服务器连接json文件
在这里插入图片描述
2.在对应json文件中找到password的值

3.运行解析程序

	public static byte[] md5(byte[] data) {
        byte[] res=null;
        try {
            MessageDigest m;
            m = MessageDigest.getInstance("MD5");
            m.update(data, 0, data.length);
            res=m.digest();
        } catch (NoSuchAlgorithmException e) {
            log.error(e.getMessage());
        }
        return res;
    }

	static byte[] ranDomKey(byte[] head) {
        long ks = 3680984568597093857L / (long)(new Random(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) {
                log.error(var18.getMessage());
            }
        }
        try {
            dos.close();
        } catch (IOException var17) {
            log.error(var17.getMessage());
        }
        byte[] keyData = bos.toByteArray();
        keyData = md5(keyData);
        return keyData;
    }

	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;
        }
    }

	public static void main(String[] args) throws Exception {
        System.out.println(decodePass("第二步password值"));
    }