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[feat] 앱 네이티브 SDK 소셜 로그인 및 앱 전용 토큰 API - #136
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공유 빌더에 DataPipelineClient가 추가한 내부 시크릿 헤더가 다른 외부 클라이언트 요청에 섞일 수 있었음 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Google·Apple: JWKS 서명·iss·aud 검증, 서버 발급 1회용 nonce 소비 - Kakao: access_token_info app_id 확인 후 사용자 정보 조회 - Apple: authorizationCode 교환·revoke 클라이언트(.p8 ES256 client_secret) - 제공자 장애는 SOCIAL_PROVIDER_UNAVAILABLE(502)로 분리 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- POST /api/auth/login/nonce, POST /api/auth/login/{provider}/token
- POST /api/auth/app/refresh, /api/auth/app/logout (요청·응답 바디로 Refresh Token 전달)
- 회원 조회·생성(SocialUserService)과 토큰 발급(AuthService.issueTokens) 공용화
- Apple 코드 교환 id_token sub 대조, 탈퇴 커밋 후 Apple 토큰 revoke
- dev 로그인 응답에 refreshToken 추가
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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📝 Walkthrough
Merge Risk: 🔵 Low · up to
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Docstring Coverage |  |
Docstring coverage is 20.37% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 216 functions across 47 files. (4 skipped… | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly summarizes the main changes: native app SDK social login and app-specific token APIs. Linked Issues check The PR implements the coding requirements in #134. It adds app nonce and provider-token login APIs, Google/Kakao/Apple validation, Apple authorization-code subject matching and refresh-token storage, …Out of Scope Changes check The changes stay within #134. Provider clients, error mapping, nonce storage, Apple revoke handling, the V41 migration, security policy updates, and prototype-scoped WebClient.Builder support the app …Full details: Linked Issues check
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Explanation
The PR implements the coding requirements in
#134. It adds app nonce and provider-token login APIs, Google/Kakao/Apple validation, Apple authorization-code subject matching and refresh-token storage, shared user/session logic, suspended-user handling, app refresh/logout APIs, dev refresh-token output, token rotation and reuse detection, Apple revoke after commit, migration/configuration, and focused automated tests. The existing web cookie endpoints remain separate. The issue's specification-document update is explicitly deferred and is non-coding documentation work.
Full details: Out of Scope Changes check
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Explanation
The changes stay within
#134. Provider clients, error mapping, nonce storage, Apple revoke handling, the V41 migration, security policy updates, and prototype-scoped WebClient.Builder support the app authentication flow or prevent related security regressions. The tests and shared-service refactoring support the same objectives. No unrelated product behavior is shown.
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Full details: Docstring Coverage
-
Explanation
Docstring coverage is 20.37% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 216 functions across 47 files. (4 skipped: 4 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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Actionable comments posted: 1
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at
@src/main/java/com/Coming/Backend/auth/service/SocialUserService.java:
- Around line 53-68: Update findOrCreate and findOrCreateAppleUser to delegate
user insertion to a separate bean method using REQUIRES_NEW and saveAndFlush, so
the transaction rolls back before the fallback lookup runs. Restrict recovery to
the provider/provider_id unique-constraint violation; rethrow other
DataIntegrityViolationException cases. After a successful create, return the
persisted user through the existing repository path while preserving the
concurrent-login fallback behavior.
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📒 Files selected for processing: 51
.claude/agents/security-reviewer.mdCLAUDE.mdsrc/main/java/com/Coming/Backend/auth/controller/AuthController.javasrc/main/java/com/Coming/Backend/auth/controller/SocialLoginController.javasrc/main/java/com/Coming/Backend/auth/dev/DevAuthController.javasrc/main/java/com/Coming/Backend/auth/dev/DevAuthService.javasrc/main/java/com/Coming/Backend/auth/dto/AppLogoutRequest.javasrc/main/java/com/Coming/Backend/auth/dto/AppRefreshRequest.javasrc/main/java/com/Coming/Backend/auth/dto/LoginNonceResponse.javasrc/main/java/com/Coming/Backend/auth/dto/SocialLoginResponse.javasrc/main/java/com/Coming/Backend/auth/dto/SocialTokenLoginRequest.javasrc/main/java/com/Coming/Backend/auth/entity/User.javasrc/main/java/com/Coming/Backend/auth/event/AppleTokenRevokeEvent.javasrc/main/java/com/Coming/Backend/auth/event/AppleTokenRevokeListener.javasrc/main/java/com/Coming/Backend/auth/exception/SocialProviderUnavailableException.javasrc/main/java/com/Coming/Backend/auth/exception/SocialTokenInvalidException.javasrc/main/java/com/Coming/Backend/auth/exception/UserSuspendedException.javasrc/main/java/com/Coming/Backend/auth/oauth2/CustomOAuth2UserService.javasrc/main/java/com/Coming/Backend/auth/oauth2/OAuth2SuccessHandler.javasrc/main/java/com/Coming/Backend/auth/repository/LoginNonceRepository.javasrc/main/java/com/Coming/Backend/auth/service/AuthService.javasrc/main/java/com/Coming/Backend/auth/service/SocialLoginService.javasrc/main/java/com/Coming/Backend/auth/service/SocialUserService.javasrc/main/java/com/Coming/Backend/auth/social/AppleAuthClient.javasrc/main/java/com/Coming/Backend/auth/social/AppleIdentityTokenVerifier.javasrc/main/java/com/Coming/Backend/auth/social/AppleUserInfo.javasrc/main/java/com/Coming/Backend/auth/social/GoogleIdTokenVerifier.javasrc/main/java/com/Coming/Backend/auth/social/IdTokenDecoders.javasrc/main/java/com/Coming/Backend/auth/social/KakaoTokenVerifier.javasrc/main/java/com/Coming/Backend/auth/social/SocialProviderCalls.javasrc/main/java/com/Coming/Backend/auth/social/SocialTokenVerifier.javasrc/main/java/com/Coming/Backend/common/config/SecurityConfig.javasrc/main/java/com/Coming/Backend/common/config/WebClientConfig.javasrc/main/java/com/Coming/Backend/common/exception/ErrorCode.javasrc/main/resources/application.yamlsrc/main/resources/db/migration/V41__add_apple_refresh_token_to_user.sqlsrc/test/java/com/Coming/Backend/auth/controller/AuthControllerTest.javasrc/test/java/com/Coming/Backend/auth/controller/SocialLoginControllerTest.javasrc/test/java/com/Coming/Backend/auth/event/AppleTokenRevokeListenerTest.javasrc/test/java/com/Coming/Backend/auth/oauth2/CustomOAuth2UserServiceTest.javasrc/test/java/com/Coming/Backend/auth/oauth2/OAuth2SuccessHandlerTest.javasrc/test/java/com/Coming/Backend/auth/repository/LoginNonceRepositoryTest.javasrc/test/java/com/Coming/Backend/auth/service/AuthServiceTest.javasrc/test/java/com/Coming/Backend/auth/service/SocialLoginServiceTest.javasrc/test/java/com/Coming/Backend/auth/service/SocialUserServiceTest.javasrc/test/java/com/Coming/Backend/auth/social/AppleAuthClientTest.javasrc/test/java/com/Coming/Backend/auth/social/AppleIdentityTokenVerifierTest.javasrc/test/java/com/Coming/Backend/auth/social/GoogleIdTokenVerifierTest.javasrc/test/java/com/Coming/Backend/auth/social/IdTokenDecodersTest.javasrc/test/java/com/Coming/Backend/auth/social/KakaoTokenVerifierTest.javasrc/test/java/com/Coming/Backend/auth/social/SocialProviderCallsTest.java
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- 유니크 제약 위반이 외부 트랜잭션을 rollback-only로 만들어 재조회가 실패하던 문제 수정 - SocialUserCreator(REQUIRES_NEW + saveAndFlush)로 INSERT 분리 - uq_user_provider_provider_id 위반만 재조회로 복구하고 그 외 제약 위반은 재던짐 - 실제 PostgreSQL로 경합을 재현하는 통합 테스트 추가 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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관련 이슈
Closes #134
변경 개요
모바일 앱은 외부 브라우저에서 받은 HttpOnly Refresh Token 쿠키를 앱 HttpClient로 가져올 수 없어, 웹용 OAuth2 리다이렉트 로그인을 쓸 수 없다. 앱이 기기에서 Google·Kakao·Apple SDK로 받은 토큰을 서버가 제공자 기준으로 검증하고, 우리 Access/Refresh Token을 응답 바디로 내려주는 앱 전용 API를 추가한다. 웹 쿠키 엔드포인트의 동작은 바뀌지 않는다. (App: Cominggg/App#10)
변경사항
auth/controller/SocialLoginControllerPOST /api/auth/login/nonce,POST /api/auth/login/{provider}/token(google·kakao·apple)auth/controller/AuthControllerPOST /api/auth/app/refresh,POST /api/auth/app/logout(바디로 Refresh Token 전달)auth/service/SocialLoginServiceauth/service/SocialUserServiceCustomOAuth2UserService의 회원 조회·생성 로직을 옮겨 웹·앱이 공유. SUSPENDED →UserSuspendedExceptionauth/service/AuthServicecreateSession·issueTokens추출, 탈퇴 시 Apple 토큰 revoke 이벤트 발행auth/social/*auth/event/AppleTokenRevokeListenerauth/repository/LoginNonceRepositoryauth/oauth2/*,auth/dev/*common/config/WebClientConfigWebClient.Builder빈을 prototype으로 변경(클라이언트 간 baseUrl·내부 시크릿 헤더 공유 차단)common/config/SecurityConfig/api/auth/app/refreshpermitAll,/api/auth/app/logout인증 필요common/exception/ErrorCodeSOCIAL_TOKEN_INVALID(401),SOCIAL_PROVIDER_UNAVAILABLE(502)db/migration/V41__add_apple_refresh_token_to_user.sqluser.apple_refresh_token컬럼application.yamlapp.oauth2.kakao.app-id,app.oauth2.apple.{bundle-id,team-id,key-id,private-key}(기본값 빈 문자열)CLAUDE.md,.claude/agents/security-reviewer.md주요 구현 내용
POST /api/auth/login/nonce로 받은 값을 Google·Apple SDK 요청에 그대로 넣는다. 서버는 토큰의 nonce 클레임을 Redis에서 원자적으로 삭제(소비)하고, 발급하지 않았거나 이미 쓴 nonce면 401을 낸다.SOCIAL_TOKEN_INVALID, 제공자 5xx·타임아웃(5초)·JWKS 조회 실패는 502SOCIAL_PROVIDER_UNAVAILABLE. Apple 4xx 중invalid_grant만 401이고invalid_client등 설정 오류는 500으로 올려 알림이 가게 했다.@TransactionalEventListener(AFTER_COMMIT))으로 뺐다. 실패해도 탈퇴는 유지하고 토큰을 남긴다.테스트
./gradlew test875건 통과,BackendApplicationTests.contextLoads()통과리뷰어 참고사항
KAKAO_APP_ID,APPLE_BUNDLE_ID,APPLE_TEAM_ID,APPLE_KEY_ID,APPLE_PRIVATE_KEY(.p8 내용, 줄바꿈은\n문자 허용). 비어 있으면 해당 제공자 로그인은 401(Apple 키가 비면 코드 교환 시 500).email_verified=true일 때만 저장한다.DataPipelineClient가 넣은X-Internal-Secret헤더가 Discord 웹훅 요청에 섞일 수 있었다. prototype 전환으로 함께 해소된다.spec/api/auth.md,spec/policy/auth-policy.md)는 이 PR 이후/sync-docs로 반영한다.코드 리뷰
변경사항 요약
auth 패키지(controller·service·social·event·repository·dto·exception·oauth2·dev·entity), common의
SecurityConfig·ErrorCode·WebClientConfig, V41 마이그레이션,application.yaml, 인증 정책 문서. 사전 게이트:/be-review🔴 0건,security-reviewercritical 1건(정책 문서 충돌) → 정책 개정으로 해소, major 4건 반영,/simplify반영.검토 결과
🟡 warning
auth/service/SocialLoginService.java: 생성자 파라미터 6개(기준 5개 초과)→ 의존성마다 역할이 달라 묶으면 오히려 응집도가 떨어져 유지
auth/dev/DevAuthController.java: 응답을 DTO 대신Map으로 반환→ 기존 방식을 그대로 두고 refreshToken 필드만 추가
🔵 suggestion
auth/social/AppleUserInfo.java:GoogleOAuth2UserInfo와 클레임 처리(sub·email)가 같음→ 웹 클래스 이름까지 바꿔야 해서 별도 클래스로 유지
auth/jwt/JwtProvider.java: 인자 1개generateRefreshToken(userId)가 main에서 더 이상 쓰이지 않음(테스트에서만 사용)Summary by CodeRabbit
New Features
Security