spring-boot-security-example

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🚀Quickstart

What's included?

🧰Prerequisite(s)

• Intellij Idea CE
• Postman

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Sequence Diagram

Basic Auth.

sequenceDiagram
    participant Client
    participant Backend
    Client->>+Backend: HTTP Request (GET)
    Backend->>Backend: Checks authorization
    Backend-->>-Client: Returns 401 
    Note over Backend,Client: UNAUTHORIZED
    Client->>+Backend: HTTP Request (GET) => Basic64 username:password
    Backend->>Backend: Checks username:password
    Backend-->>-Client: Responds: 200
    Note over Backend,Client: OK

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JWT Auth.

sequenceDiagram
    participant Client
    participant JwtAuthFilter
    participant UserDetailsService
    participant UserDao
    participant SecurityContextHolder
    participant GreetingController
    par Backend / API
        Client->>JwtAuthFilter: GET /api/v1/greetings
        JwtAuthFilter->>+JwtAuthFilter: Check if the JWT exists
        JwtAuthFilter->>-UserDetailsService: Ask for user information
        UserDetailsService->>UserDao: Fetch user information
        UserDao->>UserDetailsService: Sends back user details
        UserDetailsService->>JwtAuthFilter: Receives user details
        JwtAuthFilter->>+JwtAuthFilter: Compare / validate JWT data w/ the current user
        JwtAuthFilter->>-SecurityContextHolder: Update the SecurityContextHolder and call the filterChain
        SecurityContextHolder->>+SecurityContextHolder: Set the user as authenticated
        SecurityContextHolder->>-SecurityContextHolder: Forward the request to DispatchServlet
        SecurityContextHolder->>GreetingController: sayHello()
        GreetingController->>Client: Returns: "Hello from our API"
    end

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curl 호출 테스트

Basic Auth.

⚠️401 Unauthorized

로그인 인증 없이 호출 했을 시 401 Unauthorized 응답결과 나오는지 확인

curl http://localhost:8080/api/v1/greetings

✅ 200 Ok

로그인 인증결과로 Basic Auth처리 후 호출 했을 시 200 Ok 응답결과가 나오는지 확인

(예를들어) 인증결과는 스프링 부트 후 로그에 아래와 같이 기록된다.

...
Using generated security password: 7dd436e6-1c3d-4dde-b09a-cb648b1fa400
...

curl -u "user:7dd436e6-1c3d-4dde-b09a-cb648b1fa400" \
    http://localhost:8080/api/v1/greetings

JWT Auth.

JWT인증토큰 발행

인증정보가 유효한 사용자 정보를 인자로 넣어 요청

curl -s -X POST -H 'Accept: application/json' \
    -H "Content-Type: application/json" \
    --data '{"email": "[email protected]", "password": "password"}' \
    http://localhost:8080/api/v1/auth/authenticate

(예를 들면) 결과는 아래와 같이 암호화 된 문자열로 나온다.

eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJib3VhbGkuc29jaWFsQGdtYWlsLmNvbSIsImF1dGhvcml0aWVzIjpbeyJhdXRob3JpdHkiOiJST0xFX0FETUlOIn1dLCJpYXQiOjE2NzA0MDY2NjgsImV4cCI6MTY3MDQ5MzA2OH0.4Hpq0xWPMoodJeu9wc7zOIPlp_Xw8xD3S79d8gOdjNs

JWT토큰을 활용하여 API 요청

curl -H "Accept: application/json" \
    -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJib3VhbGkuc29jaWFsQGdtYWlsLmNvbSIsImF1dGhvcml0aWVzIjpbeyJhdXRob3JpdHkiOiJST0xFX0FETUlOIn1dLCJpYXQiOjE2NzA0MDY2NjgsImV4cCI6MTY3MDQ5MzA2OH0.4Hpq0xWPMoodJeu9wc7zOIPlp_Xw8xD3S79d8gOdjNs" \
    http://localhost:8080/api/v1/greetings

curl -H "Accept: application/json" \
    -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJib3VhbGkuc29jaWFsQGdtYWlsLmNvbSIsImF1dGhvcml0aWVzIjpbeyJhdXRob3JpdHkiOiJST0xFX0FETUlOIn1dLCJpYXQiOjE2NzA0MDY2NjgsImV4cCI6MTY3MDQ5MzA2OH0.4Hpq0xWPMoodJeu9wc7zOIPlp_Xw8xD3S79d8gOdjNs" \
    http://localhost:8080/api/v1/greetings/say-goodbye    

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✅Task(s) Completed

• initialize project
• Bootstrap app
• Create API
• Install Spring Security
• Implement basic authentication
• Implement JWT authentication filter
• Implement JWT utils class and finalize the filter
• Tell Spring to use the JWT filter
• Implement userDetailsService
• Add the authenticationProvider bean
• Add session management creation policy
• Implement Authentication controller
• Improve the code
• Testing the application

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📚References

• Spring Security Tutorial - [NEW] [2022] | Amigoscode
• jwt Official Site