Rpamis Security

Rpamis-Security Skill

Enterprise-grade MyBatis data security component providing annotation-based data masking and automatic database encryption/decryption with SM4 support.

🎯 When to Use This Skill

Invoke this skill when you need to:

• Implement data masking for sensitive information (names, phones, ID cards, emails, bank cards)
• Set up automatic database field encryption/decryption
• Work with SM4 (Chinese national standard) encryption algorithm
• Use @Masked or @SecurityField annotations
• Customize masking rules or encryption algorithms
• Handle nested entity masking scenarios
• Troubleshoot encryption/decryption issues
• Migrate from older versions or similar security frameworks

📦 Quick Integration

Step 1: Add Maven Dependency

For JDK 17+ (Recommended):

<dependency>
    <groupId>com.rpamis</groupId>
    <artifactId>rpamis-security-spring-boot-starter</artifactId>
    <version>1.1.4</version>
</dependency>

For JDK 8-17:

<dependency>
    <groupId>com.rpamis</groupId>
    <artifactId>rpamis-security-spring-boot-starter</artifactId>
    <version>1.0.7</version>
</dependency>

Step 2: Configure Application

application.yml (Complete Configuration):

rpamis:
  security:
    enable: true
    ignore-decrypt-failed: true
    desensitization-enable: true
    custom-pointcut: '@within(org.springframework.web.bind.annotation.RestController)'
    algorithm:
      active: sm4
      sm4:
        key: 1234567890123456
        prefix: ENC_SM4_

Configuration Parameters Explained:

Step 3: Use Annotations

For Data Masking:

import com.rpamis.security.annotation.Masked;
import com.rpamis.security.mask.MaskType;

public class UserVO {
    @Masked(type = MaskType.NAME_MASK)
    private String name;
    
    @Masked(type = MaskType.PHONE_MASK)
    private String phone;
    
    @Masked(type = MaskType.IDCARD_MASK)
    private String idCard;
}

For Nested Masking:

import com.rpamis.security.annotation.Masked;
import com.rpamis.security.annotation.NestedMasked;
import com.rpamis.security.mask.MaskType;

public class UserVO {
    @Masked(type = MaskType.NAME_MASK)
    private String name;
    
    @NestedMasked
    private ContactInfoVO contactInfo;
}

For Database Encryption:

import com.rpamis.security.annotation.SecurityField;

public class UserDO {
    private Long id;
    
    @SecurityField
    private String password;
    
    @SecurityField
    private String idCard;
}

🎭 Data Masking Guide

Built-in Masking Types

Custom Masking Example

public class UserVO {
    @Masked(type = MaskType.CUSTOM_MASK, start = 2, end = 5, symbol = "#")
    private String customField;
}

Result: ABCDEFG → AB###FG

Nested Masking

Use @NestedMasked annotation to mark nested entity fields that need masking:

import com.rpamis.security.annotation.Masked;
import com.rpamis.security.annotation.NestedMasked;
import com.rpamis.security.mask.MaskType;

@Data
public class UserDetailVO implements Serializable {
    private static final long serialVersionUID = 1L;
    
    @Masked(type = MaskType.NAME_MASK)
    private String name;
    
    @NestedMasked
    private ContactInfoVO contactInfo;
}

@Data
public class ContactInfoVO implements Serializable {
    private static final long serialVersionUID = 1L;
    
    @Masked(type = MaskType.PHONE_MASK)
    private String phone;
    
    @Masked(type = MaskType.EMAIL_MASK)
    private String email;
    
    @NestedMasked
    private AddressVO address;
}

@Data
public class AddressVO implements Serializable {
    private static final long serialVersionUID = 1L;
    
    @Masked(type = MaskType.ADDRESS_MASK)
    private String homeAddress;
    
    @Masked(type = MaskType.ADDRESS_MASK)
    private String officeAddress;
}

Controller Example:

@RestController
@RequestMapping("/api")
public class UserDetailController {
    
    @PostMapping("/user/detail")
    @Desensitizationed
    public UserDetailVO getUserDetail() {
        AddressVO address = new AddressVO();
        address.setHomeAddress("北京市朝阳区建国路88号");
        address.setOfficeAddress("北京市海淀区中关村");
        
        ContactInfoVO contactInfo = new ContactInfoVO();
        contactInfo.setPhone("13812345678");
        contactInfo.setEmail("zhangsan@example.com");
        contactInfo.setAddress(address);
        
        UserDetailVO userDetail = new UserDetailVO();
        userDetail.setName("张三");
        userDetail.setContactInfo(contactInfo);
        return userDetail;
    }
}

Output:

{
  "name": "张*",
  "contactInfo": {
    "phone": "138****5678",
    "email": "z****n@example.com",
    "address": {
      "homeAddress": "北京市朝阳区***",
      "officeAddress": "北京市海淀区***"
    }
  }
}

Key Points:

• Use @NestedMasked on nested entity fields
• Nested entities can also contain @NestedMasked fields (multi-level nesting)
• All @Masked fields in nested entities will be processed automatically
• Works with @Desensitizationed annotation on controller methods

Enable Masking in Controller

Add @Desensitizationed annotation to controller methods:

@RestController
@RequestMapping("/user")
public class UserController {
    
    @GetMapping("/info")
    @Desensitizationed
    public UserVO getUserInfo() {
        return userService.getUser();
    }
    
    @GetMapping("/list")
    @Desensitizationed
    public List<UserVO> getUserList() {
        return userService.getUserList();
    }
}

Supported Return Types:

• Single entity: UserVO
• List: List<UserVO>
• Map: Map<String, UserVO>
• Generic wrapper: Response<UserVO>
• Non-generic wrapper: Response

🔒 Database Encryption Guide

How It Works

1. Insert Operation: Automatically encrypts @SecurityField annotated fields before saving
2. Select Operation: Automatically decrypts encrypted fields after querying
3. Update Operation: Encrypts new values, handles deep copy to preserve source object
4. Deep Copy Design: Source object reference preserved after save operations

MyBatis-Plus Integration

@TableName("user")
public class UserDO {
    @TableId(value = "id", type = IdType.AUTO)
    private Long id;
    
    @TableField(value = "name")
    @SecurityField
    private String name;
    
    @TableField(value = "id_card")
    @SecurityField
    private String idCard;
    
    @TableField(value = "phone")
    @SecurityField
    private String phone;
}

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;
    
    public void saveUser(UserDO user) {
        userMapper.insert(user);
        // user.name still equals original value (deep copy)
    }
    
    public UserDO getUser(Long id) {
        return userMapper.selectById(id);
        // name, idCard, phone are automatically decrypted
    }
}

MyBatis XML Integration

<mapper namespace="com.example.mapper.UserMapper">
    <insert id="insert" parameterType="UserDO">
        INSERT INTO user (name, id_card, phone)
        VALUES (#{name}, #{idCard}, #{phone})
    </insert>
    
    <select id="selectById" resultType="UserDO">
        SELECT id, name, id_card, phone
        FROM user
        WHERE id = #{id}
    </select>
</mapper>

Handling Encrypted Data Updates

@PostMapping("/update")
public void updateUser() {
    UserDO user = new UserDO();
    user.setName("张三");
    user.setIdCard("500101111118181952");
    userMapper.insert(user);
    
    // Update with same object reference
    user.setName("李四");
    userMapper.updateById(user);
    
    UserDO result = userMapper.selectById(user.getId());
    // result.name equals "李四"
}

Wrapper Update with Manual Encryption

@PostMapping("/update/wrapper")
public void updateWithWrapper() {
    UpdateWrapper<UserDO> updateWrapper = new UpdateWrapper<>();
    updateWrapper.lambda()
        .set(UserDO::getName, securityAlgorithm.encrypt("李四"))
        .eq(UserDO::getId, userId);
    userMapper.update(null, updateWrapper);
}

🔧 Advanced Features

Custom Encryption Algorithm

@Component
public class CustomAlgorithmImpl implements SecurityAlgorithm {
    
    @Override
    public String encrypt(String content) {
        // Your custom encryption logic
        return encryptedContent;
    }
    
    @Override
    public String decrypt(String content) {
        // Your custom decryption logic
        return decryptedContent;
    }
}

Custom Mask Function

@Component
public class CustomMaskFunction implements MaskFunction {
    
    @Override
    public String mask(String content) {
        // Your custom masking logic
        return maskedContent;
    }
}

Check if Data is Encrypted

@Autowired
private SecurityUtils securityUtils;

public void checkEncryption(String value) {
    boolean isEncrypted = securityUtils.checkHasBeenEncrypted(value);
    // Returns true if value starts with ENC_SM4_
}

🧪 Testing Guide

Unit Test Example

@SpringBootTest
public class SecurityTest {
    
    @Autowired
    private UserMapper userMapper;
    
    @Test
    public void testInsertAndDecrypt() {
        UserDO user = new UserDO();
        user.setName("张三");
        user.setIdCard("500101111118181952");
        user.setPhone("12345678965");
        
        userMapper.insert(user);
        
        UserDO result = userMapper.selectById(user.getId());
        assertEquals("张三", result.getName());
        assertEquals("500101111118181952", result.getIdCard());
        assertEquals("12345678965", result.getPhone());
    }
    
    @Test
    @Desensitizationed
    public void testMasking() {
        UserVO user = userService.getUser();
        assertEquals("张*", user.getName());
        assertEquals("500***********1952", user.getIdCard());
    }
}

⚡ Performance Optimization

1. Batch Operations

List<UserDO> userList = new ArrayList<>();
userList.add(user1);
userList.add(user2);
userService.saveBatch(userList);

2. Selective Field Encryption

Only encrypt sensitive fields:

public class UserDO {
    private Long id;
    
    private String username;
    
    @SecurityField
    private String password;
    
    @SecurityField
    private String idCard;
    
    private Integer age;
}

3. Cache Isolation

The framework automatically isolates encryption/decryption cache to prevent interference:

@Test
public void testCacheIsolate() {
    TestVersionV2DO encrypted = mapper.selectById(1);
    TestVersionDO normal = new TestVersionDO();
    normal.setName("张三");
    mapper.insert(normal);
    // normal.name is not affected by previous decryption
}

🛡️ Security Best Practices

1. Key Management

DO NOT hardcode encryption keys in source code:

rpamis:
  security:
    algorithm:
      sm4:
        key: ${SM4_KEY:default-key-for-dev}

Use environment variables or secret management services.

2. Key Rotation

• Change encryption keys periodically
• Maintain key version history for backward compatibility
• Plan migration strategy for existing encrypted data

3. Access Control

• Limit access to encryption keys
• Use different keys for different environments (dev, test, prod)
• Audit key usage and access logs

4. Error Handling

rpamis:
  security:
    ignore-decrypt-failed: true

Set to false in production to detect tampering attempts.

🔍 Troubleshooting

Issue 1: Encryption Not Working

Symptoms: Data stored in plaintext

Checklist:

1. ✓ rpamis.security.enable is true
2. ✓ @SecurityField annotation present on field
3. ✓ Correct Maven dependency version
4. ✓ SM4 key configured (16 characters)

Debug:

@Autowired
private SecurityAlgorithm securityAlgorithm;

String encrypted = securityAlgorithm.encrypt("test");
System.out.println(encrypted);

Issue 2: Masking Not Applied

Symptoms: Sensitive data returned without masking

Checklist:

1. ✓ rpamis.security.desensitization-enable is true
2. ✓ @Masked annotation present on field
3. ✓ @Desensitizationed annotation on controller method
4. ✓ AOP enabled in Spring Boot (@EnableAspectJAutoProxy)

Debug:

@GetMapping("/test")
@Desensitizationed
public UserVO test() {
    UserVO user = new UserVO();
    user.setName("张三");
    return user;
}

Issue 3: SM4 Encryption Errors

Symptoms: Encryption/decryption exceptions

Checklist:

1. ✓ SM4 key is exactly 16 characters
2. ✓ SM4 algorithm supported in JDK (JDK 8u161+ or JDK 11+)
3. ✓ No special characters in key

Solution:

rpamis:
  security:
    algorithm:
      sm4:
        key: 1234567890123456

Issue 4: Decryption Returns Original Value

Symptoms: Encrypted data not decrypted

Possible Causes:

1. Data not encrypted (missing @SecurityField on insert)
2. Prefix mismatch (custom prefix configured)
3. Legacy data without prefix (version < 1.0.2)

Solution:

rpamis:
  security:
    ignore-decrypt-failed: true

Issue 5: Nested Decryption Not Working

Symptoms: Nested entity fields not decrypted

Checklist:

1. ✓ Nested entity has @SecurityField annotations
2. ✓ MyBatis result mapping correct

Example:

public class OrderVO {
    private UserDO user;
}

public class UserDO {
    @SecurityField
    private String idCard;
}

📊 Migration Guide

From Version 1.0.x to 1.1.x

Breaking Changes:

• JDK 17+ required for 1.1.4
• SM4 prefix added (ENC_SM4_)

Migration Steps:

1. Update Maven dependency to 1.1.4
2. Configure SM4 prefix in application.yml
3. Existing encrypted data automatically compatible
4. Test all encryption/decryption scenarios

From Similar Frameworks

From MyBatis-Plus Encrypt:

1. Replace @Encrypt with @SecurityField
2. Configure SM4 key
3. Update MyBatis interceptor configuration

From ShardingSphere Encrypt:

1. Replace encrypt configuration with annotations
2. Migrate encrypted data (may require re-encryption)
3. Update application configuration

📚 Real-World Examples

Example 1: User Management System

@Entity
@TableName("sys_user")
public class SysUser {
    @TableId(type = IdType.AUTO)
    private Long id;
    
    private String username;
    
    @SecurityField
    private String password;
    
    @SecurityField
    private String idCard;
    
    @SecurityField
    private String phone;
    
    @SecurityField
    private String email;
    
    private Integer status;
}

@RestController
@RequestMapping("/user")
public class UserController {
    
    @PostMapping("/register")
    public void register(@RequestBody SysUser user) {
        userService.save(user);
    }
    
    @GetMapping("/info/{id}")
    @Desensitizationed
    public UserVO getUserInfo(@PathVariable Long id) {
        SysUser user = userService.getById(id);
        return convertToVO(user);
    }
}

public class UserVO {
    private Long id;
    
    @Masked(type = MaskType.NAME_MASK)
    private String name;
    
    @Masked(type = MaskType.PHONE_MASK)
    private String phone;
    
    @Masked(type = MaskType.IDCARD_MASK)
    private String idCard;
    
    @Masked(type = MaskType.EMAIL_MASK)
    private String email;
}

Example 2: Order System with Nested Encryption

@TableName("orders")
public class Order {
    @TableId(type = IdType.AUTO)
    private Long id;
    
    private String orderNo;
    
    @SecurityField
    private String customerPhone;
    
    @SecurityField
    private String customerAddress;
    
    @TableField(typeHandler = JacksonTypeHandler.class)
    private List<OrderItem> items;
}

public class OrderItem {
    private String productName;
    
    @SecurityField
    private String receiverPhone;
}

@GetMapping("/order/{id}")
@Desensitizationed
public OrderVO getOrder(@PathVariable Long id) {
    Order order = orderService.getById(id);
    return convertToVO(order);
}

🏗️ Project Structure

rpamis-security/
├── rpamis-security-annotation/
│   ├── @Masked - Masking annotation
│   ├── @NestedMasked - Nested masking annotation
│   ├── @SecurityField - Encryption annotation
│   ├── @Desensitizationed - Controller masking trigger
│   └── MaskType - Masking type enum
├── rpamis-security-core/
│   ├── algorithm/ - Encryption algorithms (SM4)
│   ├── aop/ - Masking AOP aspect
│   ├── mybatis/ - MyBatis interceptors
│   ├── field/ - Field processors
│   └── factory/ - Mask function factory
├── rpamis-security-spring-boot-starter/
│   ├── SecurityAutoConfiguration
│   └── SecurityProperties
└── rpamis-security-test/
    └── 130+ test scenarios (89%+ coverage)

📖 Resources

• 📖 Full Documentation
• 🚀 Quick Start Guide
• 📐 Architecture Design
• 💡 Code Examples
• 🔧 API Reference
• 🧠 Technical Background
• 🧠 Principle Analysis

🎓 Key Advantages

💡 Pro Tips

1. Use ignore-decrypt-failed: true in development for easier debugging
2. Set ignore-decrypt-failed: false in production to detect data tampering
3. Always test with real database to ensure encryption/decryption works correctly
4. Use @Desensitizationed on controller methods not service methods
5. Keep encryption keys in environment variables never in source code
6. Test nested entity scenarios thoroughly
7. Monitor performance for batch operations
8. Document which fields are encrypted for team collaboration

🚨 Common Pitfalls

1. Forgetting @Desensitizationed on controller methods
2. Wrong key length for SM4 (must be 16 characters)
3. Hardcoding encryption keys in source code
4. Not testing decryption after encryption
5. Ignoring deep copy behavior when updating same object
6. Missing AOP configuration in Spring Boot
7. Using wrong version for JDK compatibility

Need help? Check the documentation or open an issue.