feat(be):소셜로그인 구현

.env.example

@@ -21,4 +21,12 @@ REDIS_PASSWORD=
 # DB_PASSWORD=your-db-password
 
 # 🔧 개발 모드 설정
-SPRING_PROFILES_ACTIVE=dev
+SPRING_PROFILES_ACTIVE=dev
+
+# 🔐 OAuth 2.0 Client Credentials
+GOOGLE_CLIENT_ID=your-google-client-id
+GOOGLE_CLIENT_SECRET=your-google-client-secret
+NAVER_CLIENT_ID=your-naver-client-id
+NAVER_CLIENT_SECRET=your-naver-client-secret
+KAKAO_CLIENT_ID=your-kakao-client-id
+KAKAO_CLIENT_SECRET=your-kakao-client-secret

src/main/kotlin/com/back/koreaTravelGuide/common/security/CustomOAuth2UserService.kt

@@ -23,6 +23,8 @@ class CustomOAuth2UserService(
         val oAuthUserInfo =
             when (provider) {
                 "google" -> parseGoogle(attributes)
+                "naver" -> parseNaver(attributes)
+                "kakao" -> parseKakao(attributes)
                 else -> throw IllegalArgumentException("지원하지 않는 소셜 로그인입니다.")
             }
 
@@ -57,6 +59,33 @@ class CustomOAuth2UserService(
             profileImageUrl = attributes["picture"] as String?,
         )
     }
+
+    private fun parseNaver(attributes: Map<String, Any>): OAuthUserInfo {
+        val response = attributes["response"] as Map<String, Any>
+
+        return OAuthUserInfo(
+            oauthId = response["id"] as String,
+            email = response["email"] as String,
+            nickname = response["name"] as String,
+            profileImageUrl = response["profile_image"] as String?,
+        )
+    }
+
+    private fun parseKakao(attributes: Map<String, Any>): OAuthUserInfo {
+        val kakaoAccount = attributes["kakao_account"] as? Map<String, Any>
+        val profile = kakaoAccount?.get("profile") as? Map<String, Any>
+        val kakaoId = attributes["id"].toString()
+
+        // 카카오는 이메일 못받아서 이렇게 처리했음
+        val email = kakaoAccount?.get("email") as? String ?: "kakao_$kakaoId@social.login"
+
+        return OAuthUserInfo(
+            oauthId = kakaoId,
+            email = email,
+            nickname = profile?.get("nickname") as? String ?: "사용자",
+            profileImageUrl = profile?.get("profile_image_url") as? String,
+        )
+    }
 }
 
 data class OAuthUserInfo(

src/main/kotlin/com/back/koreaTravelGuide/common/security/SecurityConfig.kt

@@ -68,7 +68,7 @@ class SecurityConfig(
             }
 
             if (!isDev) {
-                addFilterBefore(jwtAuthenticationFilter, UsernamePasswordAuthenticationFilter::class.java)
+                addFilterBefore<UsernamePasswordAuthenticationFilter>(jwtAuthenticationFilter)
             }
         }
 

src/main/resources/application.yml

@@ -70,13 +70,53 @@ spring:
   session:
     store-type: none  # Redis 없어도 실행 가능하도록 변경
     timeout: 30m
-
   # Redis 자동 설정 비활성화 (세션 비활성화용)
   autoconfigure:
     exclude:
       - org.springframework.boot.autoconfigure.session.SessionAutoConfiguration
       - org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration
 
+  security:
+    oauth2:
+      client:
+        registration:
+          google:
+            client-id: ${GOOGLE_CLIENT_ID}
+            client-secret: ${GOOGLE_CLIENT_SECRET}
+            scope:
+              - profile
+              - email
+          naver:
+            client-id: ${NAVER_CLIENT_ID}
+            client-secret: ${NAVER_CLIENT_SECRET}
+            authorization-grant-type: authorization_code
+            redirect-uri: "{baseUrl}/login/oauth2/code/{registrationId}"
+            scope:
+              - name
+              - email
+              - profile_image
+            client-name: Naver
+          kakao:
+            client-id: ${KAKAO_CLIENT_ID}
+            client-secret: ${KAKAO_CLIENT_SECRET}
+            client-authentication-method: client_secret_post
+            authorization-grant-type: authorization_code
+            redirect-uri: "{baseUrl}/login/oauth2/code/{registrationId}"
+            scope:
+              - profile_nickname
+              - profile_image
+            client-name: Kakao
+        provider:
+          naver:
+            authorization-uri: https://nid.naver.com/oauth2.0/authorize
+            token-uri: https://nid.naver.com/oauth2.0/token
+            user-info-uri: https://openapi.naver.com/v1/nid/me
+            user-name-attribute: response
+          kakao:
+            authorization-uri: https://kauth.kakao.com/oauth/authorize
+            token-uri: https://kauth.kakao.com/oauth/token
+            user-info-uri: https://kapi.kakao.com/v2/user/me
+            user-name-attribute: id
 # Swagger API 문서 설정 (주니어 개발자용)
 springdoc:
   api-docs: