生产环境用户的隐私数据，比如手机号、SFZ或者一些账号配置等信息，入库时都要进行不落地脱敏，也就是在进入我们系统时就要实时的脱敏处理。
用户数据进入系统，脱敏处理后持久化到数据库，用户查询数据时还要进行反向解密。这种场景一般需要全局处理，那么用AOP切面来实现在适合不过了。
首先自定义两个注解@EncryptField、@EncryptMethod分别用在字段属性和方法上，实现思路很简单，只要方法上应用到@EncryptMethod注解，则检查入参字段是否标注@EncryptField注解，有则将对应字段内容加密。
@Documented
@Target({ElementType.FIELD,ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
public @interface EncryptField {
String[] value() default "";
}
@Documented
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface EncryptMethod {
String type() default ENCRYPT;
}
切面的实现也比较简单，对入参加密，返回结果解密。
import com.xiaofu.annotation.EncryptField;
import com.xiaofu.annotation.EncryptMethod;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.jasypt.encryption.StringEncryptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.SerializationUtils;
import java.lang.reflect.Field;
import java.util.*;
import static com.xiaofu.enums.EncryptConstant.DECRYPT;
import static com.xiaofu.enums.EncryptConstant.ENCRYPT;
@Slf4j
@Aspect
@Component
public class EncryptHandler {
@Autowired
private StringEncryptor stringEncryptor;
@Pointcut("@annotation(com.xiaofu.annotation.EncryptMethod)")
public void pointCut() {
}
@Around("pointCut()")
public Object around(ProceedingJoinPoint joinPoint) {
/**
* 加密
*/
encrypt(joinPoint);
/**
* 解密
*/
Object decrypt = decrypt(joinPoint);
return decrypt;
}
public void encrypt(ProceedingJoinPoint joinPoint) {
try {
Object[] objects = joinPoint.getArgs();
if (objects.length != 0) {
for (Object o : objects) {
if (o instanceof String) {
encryptValue(o);
} else {
handler(o, ENCRYPT);
}
//TODO 其余类型自己看实际情况加
}
}
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
public Object decrypt(ProceedingJoinPoint joinPoint) {
Object result = null;
try {
Object obj = joinPoint.proceed();
if (obj != null) {
if (obj instanceof String) {
decryptValue(obj);
} else {
result = handler(obj, DECRYPT);
}
//TODO 其余类型自己看实际情况加
}
} catch (Throwable e) {
e.printStackTrace();
}
return result;
}
private Object handler(Object obj, String type) throws IllegalAccessException {
if (Objects.isNull(obj)) {
return null;
}
Field[] fields = obj.getClass().getDeclaredFields();
for (Field field : fields) {
boolean hasSecureField = field.isAnnotationPresent(EncryptField.class);
if (hasSecureField) {
field.setAccessible(true);
String realValue = (String) field.get(obj);
String value;
if (DECRYPT.equals(type)) {
value = stringEncryptor.decrypt(realValue);
} else {
value = stringEncryptor.encrypt(realValue);
}
field.set(obj, value);
}
}
return obj;
}
public String encryptValue(Object realValue) {
String value = null;
try {
value = stringEncryptor.encrypt(String.valueOf(realValue));
} catch (Exception ex) {
return value;
}
return value;
}
public String decryptValue(Object realValue) {
String value = String.valueOf(realValue);
try {
value = stringEncryptor.decrypt(value);
} catch (Exception ex) {
return value;
}
return value;
}
}
紧接着测试一下切面注解的效果，我们对字段mobile、address加上注解@EncryptField做脱敏处理。
@EncryptMethod
@PostMapping(value = "test")
@ResponseBody
public Object testEncrypt(@RequestBody UserVo user, @EncryptField String name) {
return insertUser(user, name);
}
private UserVo insertUser(UserVo user, String name) {
System.out.println("加密后的数据：user" + JSON.toJSONString(user));
return user;
}
@Data
public class UserVo implements Serializable {
private Long userId;
@EncryptField
private String mobile;
@EncryptField
private String address;
private String age;
}
请求这个接口，看到参数被成功加密，而返回给用户的数据依然是脱敏前的数据，符合我们的预期，那到这简单的脱敏实现就完事了。
