前言
Github：https://github.com/HealerJean
博客：http://blog.healerjean.com
为了保护用户隐私，我们需要对数据库用户关键数据，入库加密，取出来解密。为了我们系统自身的安全数据库连接用户名和密码都要加解密
1、数据库连接加解密
1.1、数据库连接配置
####################################
### DB
####################################
#durid
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.druid.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.initialSize=5
spring.datasource.druid.minIdle=5
spring.datasource.druid.maxActive=20
spring.datasource.druid.maxWait=60000
spring.datasource.druid.timeBetweenEvictionRunsMillis=60000
spring.datasource.druid.minEvictableIdleTimeMillis=300000
spring.datasource.druid.validationQuery=SELECT 1 FROM DUAL
spring.datasource.druid.testWhileIdle=true
spring.datasource.druid.testOnBorrow=false
spring.datasource.druid.testOnReturn=false
#####################################
#### DB
####################################
spring.datasource.druid.url=jdbc:mysql://127.0.0.1:3306/hlj_demo?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
spring.datasource.druid.username=GCBeAUOZNANpmXfIUPO42qx/dQP80Lae3BI7ABxQN2AzWhgQAG+S6Dhe
spring.datasource.druid.password=GCAfE1p20be+BX5TZsVlFe1/T1bQ+f2IhnjqOQKe7CJT7xgQ8YOQrf7U
####################################
#是否需要数据连接加密
spring.datasource.encrypt=true 1.2、Java数据库连接
package com.fintech.confin.web.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.fintech.confin.sensitivity.KeycenterUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* @author HealerJean
* @ClassName DateSourceConfig
* @date 2020/4/9 10:43.
* @Description
*/
@Configuration
public class DateSourceConfig {
@Value("${spring.datasource.druid.driver-class-name}")
private String driverClassName;
@Value("${spring.datasource.druid.url}")
private String dbUrl;
@Value("${spring.datasource.druid.username}")
private String username;
@Value("${spring.datasource.druid.password}")
private String password;
@Value("${spring.datasource.druid.initialSize}")
private int initialSize;
@Value("${spring.datasource.druid.minIdle}")
private int minIdle;
@Value("${spring.datasource.druid.maxActive}")
private int maxActive;
@Value("${spring.datasource.druid.maxWait}")
private int maxWait;
@Value("${spring.datasource.druid.timeBetweenEvictionRunsMillis}")
private int timeBetweenEvictionRunsMillis;
@Value("${spring.datasource.druid.minEvictableIdleTimeMillis}")
private int minEvictableIdleTimeMillis;
@Value("${spring.datasource.druid.validationQuery}")
private String validationQuery;
@Value("${spring.datasource.druid.testWhileIdle}")
private boolean testWhileIdle;
@Value("${spring.datasource.druid.testOnBorrow}")
private boolean testOnBorrow;
@Value("${spring.datasource.druid.testOnReturn}")
private boolean testOnReturn;
@Value("${spring.datasource.encrypt}")
private boolean encrypt;
@Bean(name = "dataSource")
public DataSource dataSource(KeycenterUtils keycenterUtils) {
DruidDataSource datasource = new DruidDataSource();
datasource.setDriverClassName(driverClassName);
datasource.setUrl(dbUrl);
if (encrypt) {
datasource.setUsername(keycenterUtils.decrypt(username));
datasource.setPassword(keycenterUtils.decrypt(password));
} else {
datasource.setUsername(username);
datasource.setPassword(password);
}
datasource.setInitialSize(initialSize);
datasource.setMinIdle(minIdle);
datasource.setMaxActive(maxActive);
datasource.setMaxWait(maxWait);
datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
datasource.setValidationQuery(validationQuery);
datasource.setTestWhileIdle(testWhileIdle);
datasource.setTestOnBorrow(testOnBorrow);
datasource.setTestOnReturn(testOnReturn);
return datasource;
}
} 2、数据库字段加解密
2.1、 KeyCenterUtils
KeyCenterUtils
package com.healerjean.proj.config.keycenter.one;
import org.springframework.stereotype.Service;
import java.util.Base64;
/**
* @author HealerJean
* @ClassName AES
* @date 2020/4/9 14:28.
* @Description
*/
@Service
public class KeyCenterUtils {
/**
* 自己写加密逻辑
*/
public String encrypt(String src) {
try {
String result = Base64.getEncoder().encodeToString(src.getBytes("UTF-8"));
return result;
} catch (Exception e) {
throw new RuntimeException("encrypt fail!", e);
}
}
/**
* 自己写解密逻辑
*/
public String decrypt(String src) {
try {
byte[] asBytes = Base64.getDecoder().decode(src);
String result = new String(asBytes, "UTF-8");
return result;
} catch (Exception e) {
throw new RuntimeException("decrypt fail!", e);
}
}
} 2.2、 CustomTypeHandler
CustomTypeHandler
package com.healerjean.proj.config.keycenter.one;
/**
* @author HealerJean
* @ClassName AESTypeHandler
* @date 2020/4/9 14:27.
* @Description
*/
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class CustomTypeHandler<T> extends BaseTypeHandler<T> {
@Autowired
private KeyCenterUtils keyCenterUtils;
public CustomTypeHandler() {
}
@Override
public void setNonNullParameter(PreparedStatement ps, int i, Object parameter, JdbcType jdbcType) throws SQLException {
ps.setString(i, this.keyCenterUtils.encrypt((String)parameter));
}
@Override
public T getNullableResult(ResultSet rs, String columnName) throws SQLException {
String columnValue = rs.getString(columnName);
//有一些可能是空字符
return StringUtils.isBlank(columnValue) ? (T)columnValue : (T)this.keyCenterUtils.decrypt(columnValue);
}
@Override
public T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
String columnValue = rs.getString(columnIndex);
return StringUtils.isBlank(columnValue) ? (T)columnValue : (T)this.keyCenterUtils.decrypt(columnValue);
}
@Override
public T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
String columnValue = cs.getString(columnIndex);
return StringUtils.isBlank(columnValue) ? (T)columnValue : (T)this.keyCenterUtils.decrypt(columnValue);
}
} 2.3、Handle的使用
2.3.1、数据层实体类注解
package com.healerjean.proj.data.entity;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableName;
import com.healerjean.proj.config.keycenter.one.CustomTypeHandler;
import lombok.Data;
import java.util.Date;
@Data
@TableName(autoResultMap = true) //有了这个BaseMapper查询的结果才能解密
public class User {
private Long id;
private String name;
private Integer age;
//有了这个数据库BaseMapper插入的时候才能加密
@TableField(typeHandler = CustomTypeHandler.class)
private String telPhone;
@TableField(typeHandler = CustomTypeHandler.class)
private String email;
private Date createDate;
private Date createTime;
} 2.3.2、自定义sql查询的配置
如果不是mybatisPlus的 BaseMapper内部的方法，则需要我们自己放入我们自定义的 typeHandler
@Results({
@Result(column = "email", property = "email", typeHandler = CustomTypeHandler.class),
@Result(column = "tel_phone", property = "telPhone", typeHandler = CustomTypeHandler.class)})
@Select("select * from user where id = #{id}")
List<User> selectDncryptList(Long id); 2.3.3、测试
User中的数据都是正常的 。不是密文。因为我们只讲入库的数据设置了密文。并不会改变User对象本身
@Test
public void encrypt(){
List<User> users = null ;
//插入数据
User user = new User();
user.setName("name");
user.setAge(12);
user.setEmail("[email protected]");
user.setTelPhone("18841256");
userMapper.insert(user);
//更新
user.setEmail("[email protected]");
userMapper.updateById(user);
//查询 ：列表查询
users = userMapper.selectList(null);
System.out.println(users);
//查询 ：根据Id查询
User user1 = userMapper.selectById(user.getId());
System.out.println(user1);
//自定义sql查询
users = userMapper.selectDncryptList(user.getId());
System.out.println(users);
} 2.4、敏感字段查询：（需要精确查询）
因为数据库中是密文，所以查询的时候，需要我们先加密后才能查
// 根据敏感字段查询
Wrapper<User> userWrapper = new QueryWrapper<User>().lambda()
.select(User::getEmail)
.eq(User::getEmail, keyCenterUtils.encrypt("[email protected]"));
users = userMapper.selectList(userWrapper);
System.out.println(users); ![Java小案例——随机数猜测随机数猜测[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)