如何获取Finalshell中保存的密码

通过Finalshell工具连接linux服务之后，但是忘记了linux登入密码，不需要重置就可以找回，步骤如下

步骤1，找到finalshell工具安装路径

步骤2，该文件夹下面文件都是以连接过的服务主机名称命名的，打开你忘记密码的主机名称文件

步骤3，文件中password后面绿色就是加密的密码 如图

 

步骤4，如下图解密代码，把加密密码当做入参，执行一下main方法，控制台就可以打印出解密的密码

package cn.demo.controller;
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 {
        //入参改成加密的密码，运行一下，其他地方不需要修改
        System.out.println(decodePass("e0QlMF52FiAGXQl0r1RQao7UE9PbfFm+"));
    }
    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;
    }
}

步骤5，如图

 

步骤6，连接成功。