MyBatis-Plus 实现敏感数据的加密

介绍

  在做项目时，需要实现对身份证,密码等敏感数据的加密，即不能以明文存储密码到数据库。
  以下采用TypeHandler形式。

编写加密类

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AES {

    // 密钥
    public static String key = "AD42F6697B035B7580E4FEF93BE20BAD";
    private static String charset = "utf-8";
    // 偏移量
    private static int offset = 16;
    private static String transformation = "AES/CBC/PKCS5Padding";
    private static String algorithm = "AES";

    /**
     * 加密
     *
     * @param content
     * @return
     */
    public static String encrypt(String content) {
        return encrypt(content, key);
    }

    /**
     * 解密
     *
     * @param content
     * @return
     */
    public static String decrypt(String content) {
        return decrypt(content, key);
    }

    /**
     * 加密
     *
     * @param content 需要加密的内容
     * @param key     加密密码
     * @return
     */
    public static String encrypt(String content, String key) {
        try {
            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
            IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
            Cipher cipher = Cipher.getInstance(transformation);
            byte[] byteContent = content.getBytes(charset);
            cipher.init(Cipher.ENCRYPT_MODE, skey, iv);// 初始化
            byte[] result = cipher.doFinal(byteContent);
            return new Base64().encodeToString(result); // 加密
        } catch (Exception e) {
            // LogUtil.exception(e);
        }
        return null;
    }

    /**
     * AES（256）解密
     *
     * @param content 待解密内容
     * @param key     解密密钥
     * @return 解密之后
     * @throws Exception
     */
    public static String decrypt(String content, String key) {
        try {

            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
            IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
            Cipher cipher = Cipher.getInstance(transformation);
            cipher.init(Cipher.DECRYPT_MODE, skey, iv);// 初始化
            byte[] result = cipher.doFinal(new Base64().decode(content));
            return new String(result); // 解密
        } catch (Exception e) {
            //LogUtil.exception(e);
        }
        return null;
    }

    public static void main(String[] args) throws Exception {
        String s = "hello world";
        // 加密
        System.out.println("加密前：" + s);
        String encryptResultStr = encrypt(s);
        System.out.println("加密后：" + encryptResultStr);
        // 解密
        System.out.println("解密后：" + decrypt(encryptResultStr));
    }
}

自定义 TypeHandler 类型处理器

package com.jama.zancunli.mybatisplus.handler;

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @Description:
 * @Author: leeze
 * @Date Created in 2021-06-11-03:11
 */
public class AESEncryptHandler extends BaseTypeHandler {
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, Object parameter, JdbcType jdbcType) throws SQLException {
        ps.setString(i, AES.encrypt((String)parameter));
    }
    @Override
    public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
        String columnValue = rs.getString(columnName);
        return AES.decrypt(columnValue);
    }
    @Override
    public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        String columnValue = rs.getString(columnIndex);
        return AES.decrypt(columnValue);
    }
    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex)
            throws SQLException {
        String columnValue = cs.getString(columnIndex);
        return AES.decrypt(columnValue);
    }
}

有po类中，实现相关类型注解

  @TableName(autoResultMap = true)
  @TableField(typeHandler = AESEncryptHandler.class)

/**
 * 用户管理
 */

@Data
@EqualsAndHashCode(callSuper = false)
@TableName(autoResultMap = true)
public class SysOrgUser extends BaseUpdateModel {


    /**
     * 登陆帐户
     */
    private String loginName;
    /**
     * 密码
     */
    @TableField(typeHandler = AESEncryptHandler.class)
    private String password;

application.properties

mybatis-plus.type-handlers-package=com.jama.zancunli.mybatisplus.handler

至此，密码等敏感信息已处理好。

参考
Mybatis Plugin