Mybatis Plus 插件注册机

分析的版本为2.83
先看下面的代码

  public static synchronized boolean refValid()
  {
    if (!validated)
    {
      validated = true;
      try
      {
        String key = MybatisSetting.getInstance().getKey(); //KEY
        String result = MybatisSetting.getInstance().getResult(); //RESULT
        if ((StringUtils.isBlank(key)) || (StringUtils.isBlank(result)))
        {
          valid = false;
        }
        else
        {
          Key publicKey = Codec.loadKey(key);
          Codec.decrypt(publicKey, Hexs.toBytes(result));
          valid = true;
        }
      }
      catch (Exception e)
      {
        valid = false;
      }
    }
    return valid;
  }

这里说明KEY和RESULT其实是C:Usersilanyu\.IntelliJIdea2016.2configoptionsmybatis.xml这个文件中获取到的

下面的

Key publicKey = Codec.loadKey(key);
Codec.decrypt(publicKey, Hexs.toBytes(result));

这两句是校验KEY和RESULT的

具体代码如下

public static Key loadKey(String key)
{
  Preconditions.checkNotNull(key, "key must not be null");
  try
  {
    KeyFactory factory = KeyFactory.getInstance("RSA");
    X509EncodedKeySpec spec = new X509EncodedKeySpec(Hexs.toBytes(key));
    return factory.generatePublic(spec);
  }
  catch (Exception e)
  {
    throw new RuntimeException(e);
  }
}

public static byte[] decrypt(Key key, byte[] raw)
{
  Preconditions.checkNotNull(key, "key must not be null");
  Preconditions.checkNotNull(raw, "raw must not be null");
  try
  {
    Cipher cipher = Cipher.getInstance("RSA");
    cipher.init(2, key);
    return cipher.doFinal(raw);
  }
  catch (Exception e)
  {
    throw new RuntimeException(e);
  }
}

首先对KEY检查，看是否含有公钥，有就通过，没有就失败
然后用KEY里的公钥检测能不能用来解密RESULT

针对性的注册机：

package com.lanyus;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;

public class Main {

    public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
        keygen.initialize(512);
        KeyPair kp = keygen.generateKeyPair();
        RSAPrivateKey privateKey = (RSAPrivateKey)kp.getPrivate();
        RSAPublicKey publicKey = (RSAPublicKey)kp.getPublic();
        System.out.println("KEY:\n" + bytesToHexString(publicKey.getEncoded()) + "\n");
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE,privateKey);
        System.out.println("RESULT:\n" + bytesToHexString(cipher.doFinal("ilanyu".getBytes())) + "\n");
    }

    private static String bytesToHexString(byte[] src){
        StringBuilder stringBuilder = new StringBuilder("");
        if (src == null || src.length <= 0) {
            return null;
        }
        for (byte aSrc : src) {
            int v = aSrc & 0xFF;
            String hv = Integer.toHexString(v);
            if (hv.length() < 2) {
                stringBuilder.append(0);
            }
            stringBuilder.append(hv);
        }
        return stringBuilder.toString();
    }
}

计算出来的KEY和RESULT:
KEY:
305c300d06092a864886f70d0101010500034b003048024100878e6bea07d7052499419efe4ed4382f426dc5ca2d01140f896a6d0566526c6757ff591347d888bd032f94ce92609ce0cc349de0ba9043dc3163f9667438a14d0203010001
RESULT:
414834456369b9329793f0b42c6c0af67d00516c7ceb136ad221fa0355dc2cd611ed1bcd36b61d00ba7e587d253c1de145831cd0d65b891c9dc34430f9e69c59

说下KEY和RESULT的使用方法:
1、安装官方版mybatis plus插件,然后关闭IDEA
2、hosts中添加127.0.0.1 www.codesmagic.com
3、记事本打开C:Users\{USER}\.IntelliJIdea{VERSION}configoptionsmybatis.xml，写入到对应的字段中，打开idea，mybatis插件已经激活