docs: define AP1 local identity profile

.gitignore

@@ -4,7 +4,6 @@
 *.iml
 
 backend/target/
-bff/target/
 **/node_modules/
 frontend/dist/
 build/

README.md

@@ -104,18 +104,38 @@ Keycloak을 잠시 중지하고 export한 뒤 자동으로 다시 올립니다.
 runtime export에는 실제 client secret과 credential hash가 포함될 수 있어
 gitignored `build/keycloak-export/`에 권한 `0600`으로만 저장됩니다.
 
-## AP3: Backend-for-Frontend
+## AP1: SPA Direct + Resource Server
 
-`develop-keycloak-pattern3`의 Spring BFF는 `http://localhost:8083`에서
+`develop-keycloak-pattern1`은 vanilla JavaScript SPA가 `spa-public` client로
-실행됩니다. 브라우저에는 HttpOnly session cookie만 두고 access/refresh
+Authorization Code + PKCE S256 로그인을 수행하는 패턴입니다. access/refresh
-token은 BFF가 서버에 보관합니다. `/bff/api/me`는 BFF가 보유 access
+token은 명시적인 in-memory store에만 보관되므로 새로고침하면 사라집니다.
-token을 붙여 Resource Server로 proxy합니다.
 
 ```bash
-./scripts/verify-pattern3.sh
+./scripts/verify-pattern1.sh
 ```
 
-자세한 경계와 session 저장소 trade-off는
+브라우저에서 `http://localhost:8088`을 열어 로그인한 뒤 보호 API를 호출할 수
-[`docs/ap3-bff-boundary.md`](docs/ap3-bff-boundary.md)를 참고하세요.
+있습니다. SPA는 `http://localhost:8081/api/me`를 직접 호출하며 Spring
-최종 AP3 branch는 `AP3_SESSION; HttpOnly; SameSite=Lax`와 Spring CSRF
+Resource Server가 Bearer JWT를 검증합니다.
-token을 함께 사용하며, token 없는 상태 변경 요청은 403으로 거부합니다.
+
+Keycloak의 dedicated audience mapper는 `spa-public` access token에
+`keycloak-pattern-api`를 추가합니다. Spring은 signature, `iss`, `exp`뿐
+아니라 이 `aud`도 검사합니다. `verify-pattern1.sh`는 같은 정상 토큰을
+`deliberately-wrong-audience`를 기대하는 진단 인스턴스에도 제출해 `401`을
+확인합니다.
+
+Keycloak은 `KC_HOSTNAME=http://localhost:8080`을 기준으로 token의 `iss`를
+발급합니다. 정상 Resource Server는 이 외부 issuer 문자열을 검증하되 JWKS는
+Docker 내부의 `http://keycloak:8080`에서 가져옵니다. 진단 인스턴스는 일부러
+`http://wrong-issuer.invalid`를 기대하도록 구성되어, 서명과 audience가
+정상이더라도 issuer mismatch로 `401`을 반환합니다.
+
+token 저장 위치와 XSS 범위는
+[`docs/ap1-token-storage.md`](docs/ap1-token-storage.md)에 정리했습니다.
+E2E는 Web Storage token이 0개임과 동시에 실행 중 fetch hook이 Bearer
+header를 관찰할 수 있음을 재현합니다.
+
+refresh rotation, 소비된 refresh token 재사용, RP-Initiated Logout,
+revocation과 stateless JWT의 차이는
+[`docs/ap1-refresh-logout.md`](docs/ap1-refresh-logout.md)에 정리했으며 같은
+E2E에서 실제 Keycloak 26.7.0 동작을 검증합니다.

backend/src/main/java/com/example/keycloakpattern/ApiController.java

@@ -27,4 +27,9 @@ public class ApiController {
         response.put("audience", jwt.getAudience());
         return response;
     }
+
+    @GetMapping("/admin")
+    public Map<String, String> adminEndpoint() {
+        return Map.of("status", "ok", "authorization", "admin-role");
+    }
 }

backend/src/main/java/com/example/keycloakpattern/KeycloakRealmRoleConverter.java

@@ -0,0 +1,28 @@
+package com.example.keycloakpattern;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.oauth2.jwt.Jwt;
+
+final class KeycloakRealmRoleConverter
+    implements Converter<Jwt, Collection<GrantedAuthority>> {
+
+    @Override
+    public Collection<GrantedAuthority> convert(Jwt jwt) {
+        Map<String, Object> realmAccess = jwt.getClaimAsMap("realm_access");
+        if (realmAccess == null || !(realmAccess.get("roles") instanceof Collection<?> roles)) {
+            return List.of();
+        }
+        return roles.stream()
+            .filter(String.class::isInstance)
+            .map(String.class::cast)
+            .map(role -> new SimpleGrantedAuthority("ROLE_" + role))
+            .map(GrantedAuthority.class::cast)
+            .toList();
+    }
+}

backend/src/main/java/com/example/keycloakpattern/SecurityConfig.java

@@ -1,11 +1,17 @@
 package com.example.keycloakpattern;
 
+import java.util.List;
+
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationConverter;
 import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
 
 @Configuration
 public class SecurityConfig {
@@ -13,15 +19,40 @@ public class SecurityConfig {
     @Bean
     SecurityFilterChain apiSecurity(HttpSecurity http) throws Exception {
         return http
+            .cors(Customizer.withDefaults())
             .csrf(csrf -> csrf.disable())
             .sessionManagement(session ->
                 session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
             .authorizeHttpRequests(authorize -> authorize
                 .requestMatchers("/actuator/health", "/actuator/health/**", "/api/public")
                 .permitAll()
+                .requestMatchers("/api/admin")
+                .hasRole("admin-role")
                 .anyRequest()
                 .authenticated())
-            .oauth2ResourceServer(oauth2 -> oauth2.jwt(Customizer.withDefaults()))
+            .oauth2ResourceServer(oauth2 -> oauth2.jwt(jwt ->
+                jwt.jwtAuthenticationConverter(jwtAuthenticationConverter())))
             .build();
     }
+
+    private JwtAuthenticationConverter jwtAuthenticationConverter() {
+        JwtAuthenticationConverter converter = new JwtAuthenticationConverter();
+        converter.setJwtGrantedAuthoritiesConverter(new KeycloakRealmRoleConverter());
+        return converter;
+    }
+
+    @Bean
+    CorsConfigurationSource corsConfigurationSource() {
+        CorsConfiguration configuration = new CorsConfiguration();
+        configuration.setAllowedOrigins(List.of(
+            "http://localhost:8088",
+            "http://127.0.0.1:8088"
+        ));
+        configuration.setAllowedMethods(List.of("GET", "OPTIONS"));
+        configuration.setAllowedHeaders(List.of("Authorization", "Content-Type"));
+
+        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+        source.registerCorsConfiguration("/api/**", configuration);
+        return source;
+    }
 }

backend/src/test/java/com/example/keycloakpattern/ApiSecurityTest.java

@@ -10,6 +10,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
 
 @SpringBootTest
 @AutoConfigureMockMvc
@@ -40,4 +41,19 @@ class ApiSecurityTest {
             .andExpect(jsonPath("$.subject").value("test-subject"))
             .andExpect(jsonPath("$.username").value("regular-user"));
     }
+
+    @Test
+    void regularUserCannotCallAdminEndpoint() throws Exception {
+        mockMvc.perform(get("/api/admin").with(jwt()
+                .authorities(new SimpleGrantedAuthority("ROLE_user-role"))))
+            .andExpect(status().isForbidden());
+    }
+
+    @Test
+    void adminRoleCanCallAdminEndpoint() throws Exception {
+        mockMvc.perform(get("/api/admin").with(jwt()
+                .authorities(new SimpleGrantedAuthority("ROLE_admin-role"))))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.authorization").value("admin-role"));
+    }
 }

backend/src/test/java/com/example/keycloakpattern/KeycloakRealmRoleConverterTest.java

@@ -0,0 +1,46 @@
+package com.example.keycloakpattern;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Instant;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.security.oauth2.jwt.Jwt;
+
+class KeycloakRealmRoleConverterTest {
+
+    private final KeycloakRealmRoleConverter converter =
+        new KeycloakRealmRoleConverter();
+
+    @Test
+    void mapsRealmRolesWithExactlyOneRolePrefix() {
+        Jwt jwt = new Jwt(
+            "token",
+            Instant.now(),
+            Instant.now().plusSeconds(60),
+            Map.of("alg", "none"),
+            Map.of("sub", "subject", "realm_access", Map.of(
+                "roles", List.of("admin-role", "user-role")
+            ))
+        );
+
+        assertThat(converter.convert(jwt))
+            .extracting("authority")
+            .containsExactly("ROLE_admin-role", "ROLE_user-role");
+    }
+
+    @Test
+    void missingRealmAccessProducesNoAuthorities() {
+        Jwt jwt = new Jwt(
+            "token",
+            Instant.now(),
+            Instant.now().plusSeconds(60),
+            Map.of("alg", "none"),
+            Map.of("sub", "subject")
+        );
+
+        assertThat(converter.convert(jwt)).isEmpty();
+    }
+}

bff/.dockerignore

@@ -1 +0,0 @@
-target/

bff/Dockerfile

@@ -1,14 +0,0 @@
-FROM maven:3.9.11-eclipse-temurin-21-alpine AS build
-WORKDIR /workspace
-COPY pom.xml .
-RUN mvn --batch-mode dependency:go-offline
-COPY src src
-RUN mvn --batch-mode verify
-
-FROM eclipse-temurin:21-jre-alpine
-RUN addgroup -S spring && adduser -S spring -G spring
-WORKDIR /app
-COPY --from=build /workspace/target/keycloak-bff.jar app.jar
-USER spring:spring
-EXPOSE 8083
-ENTRYPOINT ["java", "-jar", "/app/app.jar"]

bff/pom.xml

@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-
-    <parent>
-        <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.5.16</version>
-        <relativePath/>
-    </parent>
-
-    <groupId>com.example</groupId>
-    <artifactId>keycloak-bff</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
-    <name>keycloak-bff</name>
-
-    <properties>
-        <java.version>21</java.version>
-    </properties>
-
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-actuator</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-oauth2-client</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-web</artifactId>
-        </dependency>
-
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-test</artifactId>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.security</groupId>
-            <artifactId>spring-security-test</artifactId>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <build>
-        <finalName>keycloak-bff</finalName>
-        <plugins>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-            </plugin>
-        </plugins>
-    </build>
-</project>

bff/src/main/java/com/example/keycloakpattern/bff/BffApplication.java

@@ -1,12 +0,0 @@
-package com.example.keycloakpattern.bff;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-@SpringBootApplication
-public class BffApplication {
-
-    public static void main(String[] args) {
-        SpringApplication.run(BffApplication.class, args);
-    }
-}

bff/src/main/java/com/example/keycloakpattern/bff/BffController.java

@@ -1,112 +0,0 @@
-package com.example.keycloakpattern.bff;
-
-import java.util.LinkedHashMap;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicReference;
-
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.http.CacheControl;
-import org.springframework.http.HttpHeaders;
-import org.springframework.http.ResponseEntity;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.oauth2.client.OAuth2AuthorizeRequest;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientManager;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientService;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
-import org.springframework.web.client.RestClient;
-import org.springframework.web.server.ResponseStatusException;
-
-import static org.springframework.http.HttpStatus.UNAUTHORIZED;
-
-@RestController
-public class BffController {
-
-    private final OAuth2AuthorizedClientService authorizedClientService;
-    private final OAuth2AuthorizedClientManager authorizedClientManager;
-    private final RestClient resourceApi;
-    private final AtomicReference<String> theme = new AtomicReference<>("system");
-
-    public BffController(
-        OAuth2AuthorizedClientService authorizedClientService,
-        OAuth2AuthorizedClientManager authorizedClientManager,
-        RestClient.Builder restClientBuilder,
-        @Value("${resource-api.base-url}") String resourceApiBaseUrl
-    ) {
-        this.authorizedClientService = authorizedClientService;
-        this.authorizedClientManager = authorizedClientManager;
-        this.resourceApi = restClientBuilder.baseUrl(resourceApiBaseUrl).build();
-    }
-
-    @GetMapping("/bff/token-boundary")
-    ResponseEntity<Map<String, Object>> tokenBoundary(Authentication authentication) {
-        OAuth2AuthorizedClient client = authorizedClientService.loadAuthorizedClient(
-            "keycloak",
-            authentication.getName()
-        );
-
-        Map<String, Object> response = new LinkedHashMap<>();
-        response.put("pattern", "AP3-backend-for-frontend");
-        response.put("principal", authentication.getName());
-        response.put("accessTokenStoredOnServer", client != null
-            && client.getAccessToken() != null);
-        response.put("refreshTokenStoredOnServer", client != null
-            && client.getRefreshToken() != null);
-        response.put("browserTokenCount", 0);
-        response.put("csrfProtectionEnabled", true);
-
-        return ResponseEntity.ok()
-            .cacheControl(CacheControl.noStore())
-            .header("Pragma", "no-cache")
-            .body(response);
-    }
-
-    @GetMapping("/bff/api/me")
-    ResponseEntity<?> currentUser(Authentication authentication) {
-        OAuth2AuthorizedClient client = authorizedClient(authentication);
-        return resourceApi.get()
-            .uri("/api/me")
-            .header(
-                HttpHeaders.AUTHORIZATION,
-                "Bearer " + client.getAccessToken().getTokenValue()
-            )
-            .retrieve()
-            .toEntity(Map.class);
-    }
-
-    @PostMapping("/bff/api/preferences")
-    Map<String, Object> updatePreference(
-        Authentication authentication,
-        @RequestParam(defaultValue = "system") String theme
-    ) {
-        this.theme.set(theme);
-        return Map.of(
-            "updated", true,
-            "theme", this.theme.get(),
-            "principal", authentication.getName()
-        );
-    }
-
-    @GetMapping("/bff/api/preferences")
-    Map<String, String> preference() {
-        return Map.of("theme", theme.get());
-    }
-
-    private OAuth2AuthorizedClient authorizedClient(Authentication authentication) {
-        OAuth2AuthorizeRequest request = OAuth2AuthorizeRequest
-            .withClientRegistrationId("keycloak")
-            .principal(authentication)
-            .build();
-        OAuth2AuthorizedClient client = authorizedClientManager.authorize(request);
-        if (client == null || client.getAccessToken() == null) {
-            throw new ResponseStatusException(
-                UNAUTHORIZED,
-                "No authorized Keycloak client is available"
-            );
-        }
-        return client;
-    }
-}

bff/src/main/java/com/example/keycloakpattern/bff/CsrfController.java

@@ -1,25 +0,0 @@
-package com.example.keycloakpattern.bff;
-
-import java.util.Map;
-
-import org.springframework.http.CacheControl;
-import org.springframework.http.ResponseEntity;
-import org.springframework.security.web.csrf.CsrfToken;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-public class CsrfController {
-
-    @GetMapping("/bff/csrf")
-    ResponseEntity<Map<String, String>> csrf(CsrfToken csrfToken) {
-        return ResponseEntity.ok()
-            .cacheControl(CacheControl.noStore())
-            .header("Pragma", "no-cache")
-            .body(Map.of(
-                "headerName", csrfToken.getHeaderName(),
-                "parameterName", csrfToken.getParameterName(),
-                "token", csrfToken.getToken()
-            ));
-    }
-}

bff/src/main/java/com/example/keycloakpattern/bff/SecurityConfig.java

@@ -1,80 +0,0 @@
-package com.example.keycloakpattern.bff;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.oauth2.client.AuthorizedClientServiceOAuth2AuthorizedClientManager;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientManager;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientProvider;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientProviderBuilder;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientService;
-import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
-import org.springframework.security.oauth2.client.web.DefaultOAuth2AuthorizationRequestResolver;
-import org.springframework.security.oauth2.client.web.OAuth2AuthorizationRequestCustomizers;
-import org.springframework.security.web.SecurityFilterChain;
-import org.springframework.security.web.csrf.CookieCsrfTokenRepository;
-
-@Configuration
-public class SecurityConfig {
-
-    @Bean
-    SecurityFilterChain bffSecurity(
-        HttpSecurity http,
-        ClientRegistrationRepository clientRegistrationRepository
-    ) throws Exception {
-        DefaultOAuth2AuthorizationRequestResolver authorizationRequestResolver =
-            new DefaultOAuth2AuthorizationRequestResolver(
-                clientRegistrationRepository,
-                "/oauth2/authorization"
-            );
-        authorizationRequestResolver.setAuthorizationRequestCustomizer(
-            OAuth2AuthorizationRequestCustomizers.withPkce()
-        );
-
-        CookieCsrfTokenRepository csrfTokenRepository =
-            CookieCsrfTokenRepository.withHttpOnlyFalse();
-        csrfTokenRepository.setCookiePath("/");
-
-        return http
-            .csrf(csrf -> csrf
-                .csrfTokenRepository(csrfTokenRepository)
-                .csrfTokenRequestHandler(new SpaCsrfTokenRequestHandler()))
-            .authorizeHttpRequests(authorize -> authorize
-                .requestMatchers(
-                    "/",
-                    "/index.html",
-                    "/app.js",
-                    "/favicon.ico",
-                    "/actuator/health",
-                    "/actuator/health/**"
-                )
-                .permitAll()
-                .anyRequest()
-                .authenticated())
-            .oauth2Login(oauth2 -> oauth2
-                .authorizationEndpoint(endpoint -> endpoint
-                    .authorizationRequestResolver(authorizationRequestResolver))
-                .defaultSuccessUrl("/", true))
-            .build();
-    }
-
-    @Bean
-    OAuth2AuthorizedClientManager authorizedClientManager(
-        ClientRegistrationRepository clientRegistrationRepository,
-        OAuth2AuthorizedClientService authorizedClientService
-    ) {
-        OAuth2AuthorizedClientProvider authorizedClientProvider =
-            OAuth2AuthorizedClientProviderBuilder.builder()
-                .authorizationCode()
-                .refreshToken()
-                .build();
-
-        AuthorizedClientServiceOAuth2AuthorizedClientManager manager =
-            new AuthorizedClientServiceOAuth2AuthorizedClientManager(
-                clientRegistrationRepository,
-                authorizedClientService
-            );
-        manager.setAuthorizedClientProvider(authorizedClientProvider);
-        return manager;
-    }
-}

bff/src/main/java/com/example/keycloakpattern/bff/SpaCsrfTokenRequestHandler.java

@@ -1,40 +0,0 @@
-package com.example.keycloakpattern.bff;
-
-import java.util.function.Supplier;
-
-import jakarta.servlet.http.HttpServletRequest;
-import jakarta.servlet.http.HttpServletResponse;
-
-import org.springframework.security.web.csrf.CsrfToken;
-import org.springframework.security.web.csrf.CsrfTokenRequestAttributeHandler;
-import org.springframework.security.web.csrf.CsrfTokenRequestHandler;
-import org.springframework.security.web.csrf.XorCsrfTokenRequestAttributeHandler;
-import org.springframework.util.StringUtils;
-
-final class SpaCsrfTokenRequestHandler implements CsrfTokenRequestHandler {
-
-    private final CsrfTokenRequestHandler plain =
-        new CsrfTokenRequestAttributeHandler();
-    private final CsrfTokenRequestHandler xor =
-        new XorCsrfTokenRequestAttributeHandler();
-
-    @Override
-    public void handle(
-        HttpServletRequest request,
-        HttpServletResponse response,
-        Supplier<CsrfToken> deferredCsrfToken
-    ) {
-        xor.handle(request, response, deferredCsrfToken);
-    }
-
-    @Override
-    public String resolveCsrfTokenValue(
-        HttpServletRequest request,
-        CsrfToken csrfToken
-    ) {
-        if (StringUtils.hasText(request.getHeader(csrfToken.getHeaderName()))) {
-            return plain.resolveCsrfTokenValue(request, csrfToken);
-        }
-        return xor.resolveCsrfTokenValue(request, csrfToken);
-    }
-}

bff/src/main/resources/application.yml

@@ -1,47 +0,0 @@
-server:
-  port: ${SERVER_PORT:8083}
-  servlet:
-    session:
-      cookie:
-        name: AP3_SESSION
-        http-only: true
-        same-site: lax
-
-spring:
-  application:
-    name: keycloak-bff
-  security:
-    oauth2:
-      client:
-        registration:
-          keycloak:
-            provider: keycloak
-            client-id: bff-confidential
-            client-secret: ${KEYCLOAK_CLIENT_SECRET}
-            client-authentication-method: client_secret_basic
-            authorization-grant-type: authorization_code
-            redirect-uri: "{baseUrl}/login/oauth2/code/{registrationId}"
-            scope:
-              - openid
-              - profile
-              - email
-        provider:
-          keycloak:
-            authorization-uri: http://localhost:8080/realms/keycloak-patterns/protocol/openid-connect/auth
-            token-uri: http://keycloak:8080/realms/keycloak-patterns/protocol/openid-connect/token
-            jwk-set-uri: http://keycloak:8080/realms/keycloak-patterns/protocol/openid-connect/certs
-            user-info-uri: http://keycloak:8080/realms/keycloak-patterns/protocol/openid-connect/userinfo
-            user-name-attribute: preferred_username
-
-resource-api:
-  base-url: ${RESOURCE_API_BASE_URL:http://localhost:8081}
-
-management:
-  endpoint:
-    health:
-      probes:
-        enabled: true
-  endpoints:
-    web:
-      exposure:
-        include: health,info

bff/src/main/resources/static/app.js

@@ -1,59 +0,0 @@
-const result = document.querySelector("#result");
-
-function render(value) {
-  result.textContent = JSON.stringify(value, null, 2);
-}
-
-function readCookie(name) {
-  const prefix = `${encodeURIComponent(name)}=`;
-  const value = document.cookie
-    .split("; ")
-    .find((cookie) => cookie.startsWith(prefix));
-  return value ? decodeURIComponent(value.slice(prefix.length)) : null;
-}
-
-async function request(path, options = {}) {
-  const response = await fetch(path, {
-    ...options,
-    headers: { Accept: "application/json", ...options.headers },
-  });
-  if (response.redirected || response.status === 401) {
-    window.location.assign("/oauth2/authorization/keycloak");
-    return null;
-  }
-  const body = await response.json();
-  render({ status: response.status, ...body });
-  return { response, body };
-}
-
-document.querySelector("#login").addEventListener("click", () => {
-  window.location.assign("/oauth2/authorization/keycloak");
-});
-
-document.querySelector("#inspect").addEventListener("click", () => {
-  void request("/bff/token-boundary");
-});
-
-document.querySelector("#call-bff").addEventListener("click", () => {
-  void request("/bff/api/me");
-});
-
-document.querySelector("#change-with-csrf").addEventListener("click", async () => {
-  const csrfResponse = await fetch("/bff/csrf", {
-    headers: { Accept: "application/json" },
-  });
-  const csrf = await csrfResponse.json();
-  const csrfToken = readCookie("XSRF-TOKEN");
-  if (!csrfToken) {
-    render({ status: 500, error: "XSRF-TOKEN cookie was not created" });
-    return;
-  }
-  await request("/bff/api/preferences", {
-    method: "POST",
-    body: new URLSearchParams({ theme: "dark" }),
-    headers: {
-      "Content-Type": "application/x-www-form-urlencoded",
-      [csrf.headerName]: csrfToken,
-    },
-  });
-});

bff/src/main/resources/static/index.html

@@ -1,31 +0,0 @@
-<!doctype html>
-<html lang="ko">
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>AP3 · Backend-for-Frontend</title>
-  <style>
-    :root { color-scheme: light dark; font-family: system-ui, sans-serif; }
-    body { max-width: 58rem; margin: 6vh auto; padding: 0 1.5rem; line-height: 1.6; }
-    button { margin: 0 0.5rem 0.5rem 0; padding: 0.6rem 0.9rem; cursor: pointer; }
-    pre { min-height: 9rem; padding: 1rem; border-radius: 0.4rem;
-      background: color-mix(in srgb, CanvasText 9%, Canvas); white-space: pre-wrap; }
-  </style>
-</head>
-<body>
-  <main>
-    <h1>AP3 · Backend-for-Frontend</h1>
-    <p>
-      브라우저에는 OAuth token이 전혀 전달되지 않습니다. HttpOnly session
-      cookie로 BFF만 호출하고, BFF가 서버 보관 access token을 Resource
-      Server 요청에 붙입니다.
-    </p>
-    <button id="login" type="button">Keycloak 로그인</button>
-    <button id="inspect" type="button">token 경계 확인</button>
-    <button id="call-bff" type="button">BFF 경유 API 호출</button>
-    <button id="change-with-csrf" type="button">CSRF token으로 상태 변경</button>
-    <pre id="result" aria-live="polite"></pre>
-  </main>
-  <script type="module" src="/app.js"></script>
-</body>
-</html>

bff/src/test/java/com/example/keycloakpattern/bff/BffControllerTest.java

@@ -1,90 +0,0 @@
-package com.example.keycloakpattern.bff;
-
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
-import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.oidcLogin;
-import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.csrf;
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientManager;
-import org.springframework.security.oauth2.client.OAuth2AuthorizedClientService;
-import org.springframework.security.oauth2.core.OAuth2AccessToken;
-import org.springframework.security.oauth2.core.OAuth2RefreshToken;
-import org.springframework.test.context.bean.override.mockito.MockitoBean;
-import org.springframework.test.web.servlet.MockMvc;
-
-@SpringBootTest(properties = {
-    "KEYCLOAK_CLIENT_SECRET=test-only-secret",
-    "resource-api.base-url=http://127.0.0.1:9"
-})
-@AutoConfigureMockMvc
-class BffControllerTest {
-
-    @Autowired
-    private MockMvc mockMvc;
-
-    @MockitoBean
-    private OAuth2AuthorizedClientService authorizedClientService;
-
-    @MockitoBean
-    private OAuth2AuthorizedClientManager authorizedClientManager;
-
-    @Test
-    void reportsServerTokenCustodyWithoutReturningTokens() throws Exception {
-        OAuth2AuthorizedClient client = mock(OAuth2AuthorizedClient.class);
-        when(client.getAccessToken()).thenReturn(mock(OAuth2AccessToken.class));
-        when(client.getRefreshToken()).thenReturn(mock(OAuth2RefreshToken.class));
-        when(authorizedClientService.loadAuthorizedClient("keycloak", "test-subject"))
-            .thenReturn(client);
-
-        mockMvc.perform(get("/bff/token-boundary").with(oidcLogin()
-                .idToken(token -> token.subject("test-subject"))))
-            .andExpect(status().isOk())
-            .andExpect(header().string("Cache-Control", "no-store"))
-            .andExpect(jsonPath("$.accessTokenStoredOnServer").value(true))
-            .andExpect(jsonPath("$.refreshTokenStoredOnServer").value(true))
-            .andExpect(jsonPath("$.browserTokenCount").value(0))
-            .andExpect(jsonPath("$.csrfProtectionEnabled").value(true))
-            .andExpect(jsonPath("$.access_token").doesNotExist())
-            .andExpect(jsonPath("$.refresh_token").doesNotExist());
-    }
-
-    @Test
-    void rejectsStateChangeWithoutCsrfToken() throws Exception {
-        mockMvc.perform(post("/bff/api/preferences")
-                .param("theme", "attacker")
-                .with(oidcLogin().idToken(token -> token.subject("test-subject"))))
-            .andExpect(status().isForbidden());
-    }
-
-    @Test
-    void acceptsStateChangeWithCsrfToken() throws Exception {
-        mockMvc.perform(post("/bff/api/preferences")
-                .param("theme", "dark")
-                .with(oidcLogin().idToken(token -> token.subject("test-subject")))
-                .with(csrf()))
-            .andExpect(status().isOk())
-            .andExpect(jsonPath("$.updated").value(true))
-            .andExpect(jsonPath("$.theme").value("dark"));
-    }
-
-    @Test
-    void exposesSpaCsrfTokenWithoutCaching() throws Exception {
-        mockMvc.perform(get("/bff/csrf").with(oidcLogin()
-                .idToken(token -> token.subject("test-subject"))))
-            .andExpect(status().isOk())
-            .andExpect(header().string("Cache-Control", "no-store"))
-            .andExpect(header().exists("Set-Cookie"))
-            .andExpect(jsonPath("$.headerName").value("X-XSRF-TOKEN"))
-            .andExpect(jsonPath("$.token").isNotEmpty());
-    }
-}

docker-compose.yml

@@ -88,31 +88,57 @@ services:
       - keycloak-net
     restart: unless-stopped
 
-  bff:
+  app-wrong-audience:
+    profiles:
+      - diagnostics
     build:
-      context: ./bff
+      context: ./backend
     environment:
-      SERVER_PORT: "8083"
+      SERVER_PORT: "8081"
-      KEYCLOAK_CLIENT_SECRET: ${BFF_CLIENT_SECRET:?set BFF_CLIENT_SECRET in .env}
+      SPRING_SECURITY_OAUTH2_RESOURCESERVER_JWT_ISSUER_URI: http://localhost:8080/realms/keycloak-patterns
-      RESOURCE_API_BASE_URL: http://app:8081
+      SPRING_SECURITY_OAUTH2_RESOURCESERVER_JWT_JWK_SET_URI: http://keycloak:8080/realms/keycloak-patterns/protocol/openid-connect/certs
+      SECURITY_EXPECTED_AUDIENCE: deliberately-wrong-audience
     ports:
-      - "127.0.0.1:8083:8083"
+      - "127.0.0.1:18081:8081"
     depends_on:
       keycloak:
         condition: service_healthy
-      app:
-        condition: service_healthy
     healthcheck:
       test:
         - CMD-SHELL
-        - wget -q -O - http://127.0.0.1:8083/actuator/health | grep -q '"status":"UP"'
+        - wget -q -O - http://127.0.0.1:8081/actuator/health | grep -q '"status":"UP"'
+      interval: 10s
+      timeout: 5s
+      retries: 12
+      start_period: 20s
+    networks:
+      - keycloak-net
+
+  app-wrong-issuer:
+    profiles:
+      - diagnostics
+    build:
+      context: ./backend
+    environment:
+      SERVER_PORT: "8081"
+      SPRING_SECURITY_OAUTH2_RESOURCESERVER_JWT_ISSUER_URI: http://wrong-issuer.invalid/realms/keycloak-patterns
+      SPRING_SECURITY_OAUTH2_RESOURCESERVER_JWT_JWK_SET_URI: http://keycloak:8080/realms/keycloak-patterns/protocol/openid-connect/certs
+      SECURITY_EXPECTED_AUDIENCE: keycloak-pattern-api
+    ports:
+      - "127.0.0.1:18082:8081"
+    depends_on:
+      keycloak:
+        condition: service_healthy
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - wget -q -O - http://127.0.0.1:8081/actuator/health | grep -q '"status":"UP"'
       interval: 10s
       timeout: 5s
       retries: 12
       start_period: 20s
     networks:
       - keycloak-net
-    restart: unless-stopped
 
   nginx:
     build:

docs/account-linking-spa-ux.md

@@ -0,0 +1,18 @@
+# Account linking UX for the SPA
+
+두 흐름을 구분한다.
+
+- 로그인 도중 email collision: Keycloak의 안전한 First Broker Login flow가
+  기존 계정 인증을 요구한다.
+- 로그인한 사용자가 설정 화면에서 “Google 연결”: Client-Initiated Account
+  Linking URL을 만들어 Keycloak로 redirect한다.
+
+`createAccountLinkUrl`은 현재 token의 `session_state`, `azp`(issued-for),
+provider와 nonce를 SHA-256 서명 재료로 사용한다. SPA는 연결 성공 후
+Account Console 또는 별도 backend read model을 통해 연결 상태를 새로
+조회해야 하며 email만 보고 “연결됨”을 표시하면 안 된다.
+
+Unlink는 사용자가 다른 로그인 수단을 갖고 있는지 먼저 안내하고, Keycloak이
+마지막 federated identity 제거를 거부하면 해당 오류를 그대로 성공처럼
+처리하지 않는다. production First Broker Login에는 자동 기존-user linking을
+넣지 않는다.

docs/ap1-refresh-logout.md

@@ -0,0 +1,30 @@
+# AP1 refresh rotation and logout
+
+Realm 실행 profile:
+
+- Access Token Lifespan: 300초
+- Revoke Refresh Token: 활성화
+- Refresh Token Max Reuse: 0
+
+`e2e/pattern1.mjs`는 token 원문을 출력하지 않고 다음 순서를 실행한다.
+
+1. browser Authorization Code + PKCE 로그인으로 AT₁/RT₁/ID Token을 받는다.
+2. `signoutRedirect()`가 `id_token_hint`를 포함한 Keycloak logout endpoint를
+   호출하는지 확인한다.
+3. logout 이후 새 authorization 요청에서 로그인 화면이 다시 필요한지
+   확인한다.
+4. 새 RT₁으로 refresh하여 AT₂/RT₂를 받고 RT₂가 RT₁과 다른지 확인한다.
+5. 이미 소비된 RT₁을 재사용해 성공하지 않는지 확인한다.
+6. RT₁ 재사용 뒤 RT₂와 realm session 상태가 어떤 결과를 내는지 status로
+   기록한다. 이 결과를 사전에 family invalidation이라고 단정하지 않는다.
+7. refresh token을 revoke한 뒤 같은 refresh token의 재사용은 실패하지만,
+   이미 발급된 self-contained access JWT는 `exp` 전까지 Resource Server에서
+   계속 `200`인 stateless 함정을 확인한다.
+
+logout은 브라우저 SSO session을 종료하는 흐름이고 token revocation은 특정
+token grant를 폐기하는 흐름이다. 둘은 목적과 endpoint가 다르다.
+
+즉시 access 차단이 필요한 시스템이라면 짧은 access token TTL 외에
+introspection, reference token 또는 별도 deny-list 같은 stateful 검증을
+검토해야 한다. 이 AP1 구현은 JWT의 stateless 검증 특성을 의도적으로
+유지한다.

docs/ap1-token-storage.md

@@ -0,0 +1,29 @@
+# AP1 token storage trade-off
+
+AP1에서는 `access_token`, `refresh_token`, `id_token`을
+`oidc-client-ts`의 명시적인 `InMemoryWebStorage`에만 보관한다.
+`localStorage`와 `sessionStorage`에는 OAuth token을 저장하지 않는다.
+
+full-page authorization redirect를 생존해야 하는 일회성 transaction
+state와 PKCE verifier만 `sessionStorage`를 사용한다. callback 성공 후
+라이브러리가 해당 transaction state를 제거한다.
+
+| 저장 위치 | reload 생존 | JavaScript 접근 | AP1 선택 |
+|---|---:|---:|---:|
+| 메모리 | 아니요 | 실행 중 가능 | 사용 |
+| `sessionStorage` | 같은 탭에서 가능 | 가능 | token 저장 금지 |
+| `localStorage` | 예 | 가능 | token 저장 금지 |
+| HttpOnly cookie | 가능 | raw token 접근 불가 | AP2/AP3의 서버 소유 경계 |
+
+메모리 저장은 XSS를 제거하지 않는다. 악성 스크립트가 실행 중 `fetch`를
+후킹하면 SPA가 붙이는 `Authorization: Bearer ...` 헤더를 관찰할 수 있다.
+다만 persistent storage를 사용하지 않으므로 reload 이후 탈취 가능한 token
+복사본이 남지 않는다.
+
+`e2e/pattern1.mjs`는 다음 두 조건을 동시에 검증한다.
+
+1. access token이 Web Storage 어디에도 존재하지 않는다.
+2. 실행 중 fetch hook은 Bearer token을 관찰할 수 있다.
+
+따라서 결론은 “메모리면 XSS에 안전”이 아니라 “영속 탈취 범위를 줄이지만
+실행 중 XSS에는 여전히 노출”이다.

docs/ap3-bff-boundary.md

@@ -1,36 +0,0 @@
-# AP3 · Backend-for-Frontend
-
-## 요청과 token 경계
-
-1. 브라우저는 BFF의 `/oauth2/authorization/keycloak`로 로그인을 시작합니다.
-2. Spring `oauth2Login`은 PKCE S256 authorization code flow를 수행합니다.
-3. BFF가 client secret으로 code를 교환하고 access/refresh token을 서버의
-   `OAuth2AuthorizedClientService`에 보관합니다.
-4. 브라우저에는 OAuth token 대신 HttpOnly `AP3_SESSION` 식별자만 남습니다.
-5. 브라우저가 `/bff/api/me`를 cookie로 호출하면 BFF가 access token을
-   `Authorization: Bearer`로 붙여 Resource Server에 fan-out합니다.
-
-Resource Server는 `aud=keycloak-pattern-api`를 검증합니다. 브라우저에서는
-8081로 직접 요청하거나 Keycloak token endpoint를 호출하지 않습니다.
-
-학습용 구성은 단일 인스턴스 메모리에 session과 authorized client를
-보관합니다. BFF를 재시작하면 세션이 사라집니다. 다중 인스턴스 운영에서는
-Spring Session/Redis 같은 공유 저장소와 저장 token 암호화 정책이 필요합니다.
-
-## CSRF와 SameSite 방어
-
-`feature/keycloak-bff-oauth2login-session`에서는 방어 전 비교를 위해
-CSRF를 끄고, 다른 origin의 자동 제출 form이 `/bff/api/preferences`
-상태를 바꾸는 것을 재현합니다.
-
-`feature/keycloak-bff-csrf-samesite-defense`에서는 다음 방어를 함께
-적용합니다.
-
-- Spring synchronizer CSRF token과 `CookieCsrfTokenRepository`
-- JS가 읽는 `XSRF-TOKEN`과 요청의 `X-XSRF-TOKEN` header
-- HttpOnly `AP3_SESSION` cookie의 명시적 `SameSite=Lax`
-
-E2E는 token 없는 동일 위조 POST가 403이 되는 것, CSRF header가 있는
-정상 POST는 200인 것, cross-site POST에는 AP3 session cookie가 제외되는
-것을 각각 확인합니다. SameSite는 CSRF token을 대체하지 않는
-defense-in-depth입니다.

docs/bff-vs-spa-direct.md

@@ -1,22 +0,0 @@
-# BFF vs SPA direct
-
-| 항목 | SPA direct (AP1) | BFF (AP3) |
-|---|---|---|
-| OAuth client | public + PKCE | confidential + server secret |
-| token holder | browser JavaScript memory | BFF server |
-| browser credential | access/refresh token | HttpOnly session cookie |
-| XSS 영향 | 실행 중 token/API 권한 탈취 가능 | cookie 읽기는 막지만 same-origin 요청 악용 가능 |
-| CSRF | bearer header 중심이라 상대적으로 작음 | session cookie이므로 명시적 방어 필요 |
-| backend 상태 | stateless 가능 | session store 필요 |
-| logout/revocation | browser와 Keycloak 조정 | BFF session과 Keycloak logout 조정 |
-| scale-out | JWT 검증 위주 | sticky session 또는 shared store |
-
-이 repository의 AP3는 Spring `oauth2Login`, confidential `bff-confidential`
-client, server-side authorized-client/token 보관, HttpOnly/SameSite session,
-CSRF token을 실제 구현한다. AP1은 token을 메모리에만 두지만 XSS가 실행되면
-현재 token을 사용할 수 있다는 경계를 E2E로 보여 준다.
-
-선택은 “BFF가 항상 더 안전하다”가 아니라 threat model과 운영비의 교환이다.
-브라우저에 OAuth token을 노출하지 않는 것이 우선이고 stateful 운영을 감당할
-수 있으면 BFF, protocol과 stateless Resource Server를 직접 학습하려면 AP1이
-더 투명하다.

docs/federation-spa-zero-change.md

@@ -0,0 +1,16 @@
+# Google federation without an AP1 application fork
+
+SPA는 Google SDK나 Google token endpoint를 알지 않는다. 기존 `spa-public`
+client로 Keycloak authorization endpoint를 호출하고, Keycloak 로그인
+화면에서 mock Google을 선택해도 callback, PKCE 교환, access token audience,
+Spring API 호출은 로컬 사용자 로그인과 동일하다.
+
+달라지는 곳은 Keycloak 앞단뿐이다.
+
+```text
+SPA -> Keycloak -> Google/mock OIDC
+SPA <- Keycloak access token <- Keycloak
+```
+
+`verify-federation-spa-zero-change.sh`는 기존 SPA 로그인 버튼에서 broker를
+선택하고, 변경 없는 callback과 `/api/me`가 200인지 실제 브라우저로 검증한다.

docs/internal-spa-direct-no-google.md

@@ -0,0 +1,17 @@
+# AP1 internal SPA direct: local identity profile
+
+```text
+Browser SPA --Authorization Code + PKCE--> Keycloak
+Browser SPA --Bearer access token-------> Spring Resource Server
+```
+
+이 profile은 Keycloak 로컬 사용자만으로 동작한다. Google client ID/secret,
+public domain, broker callback이 없어도 AP1의 login, refresh, logout,
+audience/issuer 검증과 RBAC를 모두 학습할 수 있다.
+
+`mock-google` provider가 realm에 함께 존재해도 로컬 로그인은 provider
+availability에 의존하지 않는다. 실제로 federation 없는 배포를 만들 때는
+해당 IdP를 disabled로 두거나 realm overlay에서 제거한다.
+
+빠른 계약 검증은 `verify-internal-spa-no-google-contract.sh`, 실제 브라우저
+흐름은 `verify-pattern1.sh`가 담당한다.

docs/pkce-flow-stages.md

@@ -0,0 +1,15 @@
+# Authorization Code + PKCE stages
+
+1. SPA가 매 로그인마다 고엔트로피 `code_verifier`를 생성한다.
+2. SHA-256과 Base64URL로 `code_challenge`를 만든다.
+3. authorization request에는 challenge와 `S256`만 전송한다.
+4. redirect의 code와 저장해 둔 state를 대조한다.
+5. token request에 원래 verifier를 보내 code를 교환한다.
+6. verifier/state/code는 한 번 사용한 뒤 메모리에서 제거한다.
+
+Keycloak client는 public client이며 implicit와 password grant를 끄고 S256을
+강제한다. PKCE는 악성 redirect endpoint가 code만 가로챘을 때의 교환을 막지만,
+SPA 실행 컨텍스트를 장악한 XSS 자체를 막지는 않는다.
+
+`verify-pkce-flow-stages.sh`는 Web Crypto 단위 테스트, realm client 계약,
+authorization/token 요청의 필드를 함께 검사한다.

docs/refresh-token-rotation.md

@@ -0,0 +1,16 @@
+# Refresh token rotation contract
+
+Realm 설정은 refresh token revoke를 활성화하고 재사용 허용 횟수를 0으로 둔다.
+SPA는 새 token set을 받은 즉시 이전 refresh token을 폐기한다.
+
+실제 AP1 E2E는 다음을 구분한다.
+
+- RT1로 refresh하면 RT2가 새로 발급된다.
+- 이미 소비한 RT1 재사용은 성공하면 안 된다.
+- 재사용 탐지 후 RT2까지 무효화할지는 Keycloak realm 정책과 동시 요청
+  상황에 따라 관찰한다.
+- refresh token revoke 이후 refresh는 실패한다.
+- 이미 발급된 stateless access JWT는 `exp`까지 유효할 수 있다.
+
+`verify-refresh-token-rotation-contract.sh`는 realm과 E2E assertions의 계약을
+빠르게 확인한다. 실제 token 수명주기 재현은 `verify-pattern1.sh`가 수행한다.

docs/spring-role-mapping.md

@@ -0,0 +1,16 @@
+# Keycloak realm roles to Spring authorization
+
+`realm_access.roles`의 각 문자열을 `ROLE_` prefix가 붙은 Spring authority로
+변환한다. `/api/admin`은 `hasRole("admin-role")` 계약이므로 최종 authority는
+`ROLE_admin-role`이다. `hasRole("ROLE_admin-role")`로 쓰면 prefix가 중복된다.
+
+검증은 세 층으로 구성된다.
+
+- converter 단위 테스트: role claim과 claim 부재
+- MockMvc: regular 403, admin 200
+- 실제 Authorization Code + PKCE login: Keycloak token의 realm role을
+  Spring Resource Server가 변환해 regular 403/admin 200을 반환
+
+```sh
+./scripts/verify-spring-role-mapping.sh
+```

e2e/federation-zero-change.mjs

@@ -0,0 +1,46 @@
+import assert from "node:assert/strict";
+import { chromium } from "playwright-core";
+
+const password = process.env.MOCK_GOOGLE_USER_PASSWORD;
+assert.ok(password);
+
+const browser = await chromium.launch({
+  executablePath: process.env.CHROME_BIN ?? "/usr/bin/google-chrome",
+  headless: true,
+  args: ["--no-sandbox"],
+});
+
+try {
+  const page = await browser.newPage();
+  const tokenResponse = page.waitForResponse((response) =>
+    response.url().includes("/protocol/openid-connect/token")
+    && response.request().postData()?.includes("grant_type=authorization_code"),
+  );
+
+  await page.goto("http://localhost:8088/");
+  await page.locator("#login").click();
+  await page.locator('a[href*="/broker/mock-google/login"]').click();
+  await page.waitForURL(/\/realms\/mock-google\//u);
+  await page.locator("#username").fill("mock-new-user");
+  await page.locator("#password").fill(password);
+  await page.locator("#kc-login").click();
+
+  const response = await tokenResponse;
+  assert.equal(response.status(), 200);
+  const token = (await response.json()).access_token;
+  const payload = JSON.parse(
+    Buffer.from(token.split(".")[1], "base64url").toString(),
+  );
+  assert.match(payload.preferred_username, /^mock-google\./u);
+  assert.ok(payload.aud.includes("keycloak-pattern-api"));
+
+  await page.waitForURL("http://localhost:8088/");
+  await page.locator('[data-authenticated="true"]').waitFor();
+  await page.locator("#call-api").click();
+  await page.waitForFunction(() =>
+    document.querySelector("#result")?.textContent.includes('"httpStatus": 200'),
+  );
+  console.log("Google federation verified with the unchanged AP1 SPA/API contract");
+} finally {
+  await browser.close();
+}

e2e/package.json

@@ -4,7 +4,9 @@
   "version": "1.0.0",
   "type": "module",
   "scripts": {
-    "test:pattern3": "node pattern3.mjs"
+    "test:pattern1": "node pattern1.mjs",
+    "test:role-mapping": "node role-mapping.mjs",
+    "test:federation-zero-change": "node federation-zero-change.mjs"
   },
   "devDependencies": {
     "playwright-core": "1.62.0"

e2e/pattern1.mjs

@@ -0,0 +1,210 @@
+import assert from "node:assert/strict";
+import { chromium } from "playwright-core";
+
+const username = process.env.E2E_USERNAME ?? "regular-user";
+const password = process.env.E2E_PASSWORD;
+const frontendUrl = "http://localhost:8088/";
+const tokenEndpoint =
+  "http://localhost:8080/realms/keycloak-patterns/protocol/openid-connect/token";
+const revokeEndpoint =
+  "http://localhost:8080/realms/keycloak-patterns/protocol/openid-connect/revoke";
+
+assert.ok(password, "E2E_PASSWORD must be set");
+
+async function login(page) {
+  await page.locator("#login").click();
+  await page.waitForURL(/localhost:8080/u);
+  await page.locator("#username").waitFor();
+
+  const tokenResponsePromise = page.waitForResponse((response) =>
+    response.url() === tokenEndpoint
+    && response.request().postData()?.includes("grant_type=authorization_code"),
+  );
+
+  await page.locator("#username").fill(username);
+  await page.locator("#password").fill(password);
+  await page.locator("#kc-login").click();
+
+  const tokenResponse = await tokenResponsePromise;
+  assert.equal(tokenResponse.status(), 200);
+  const tokenSet = await tokenResponse.json();
+  assert.ok(tokenSet.access_token);
+  assert.ok(tokenSet.refresh_token);
+  assert.ok(tokenSet.id_token);
+
+  await page.waitForURL(frontendUrl);
+  await page.locator('[data-authenticated="true"]').waitFor();
+  return tokenSet;
+}
+
+async function postForm(url, values) {
+  return fetch(url, {
+    method: "POST",
+    headers: { "Content-Type": "application/x-www-form-urlencoded" },
+    body: new URLSearchParams(values),
+  });
+}
+
+async function refresh(refreshToken) {
+  return postForm(tokenEndpoint, {
+    grant_type: "refresh_token",
+    client_id: "spa-public",
+    refresh_token: refreshToken,
+  });
+}
+
+async function callResource(accessToken, url = "http://localhost:8081/api/me") {
+  return fetch(url, {
+    headers: { Authorization: `Bearer ${accessToken}` },
+  });
+}
+
+const browser = await chromium.launch({
+  executablePath: process.env.CHROME_BIN ?? "/usr/bin/google-chrome",
+  headless: true,
+  args: ["--no-sandbox"],
+});
+
+try {
+  const context = await browser.newContext();
+  const page = await context.newPage();
+  let authorizationUrl;
+
+  page.on("request", (request) => {
+    if (request.url().includes("/protocol/openid-connect/auth")) {
+      authorizationUrl = new URL(request.url());
+    }
+  });
+
+  await page.goto(frontendUrl);
+  const firstTokenSet = await login(page);
+
+  assert.equal(authorizationUrl?.searchParams.get("response_type"), "code");
+  assert.equal(authorizationUrl?.searchParams.get("code_challenge_method"), "S256");
+  assert.ok(authorizationUrl?.searchParams.get("code_challenge"));
+
+  await page.evaluate(() => {
+    const originalFetch = window.fetch.bind(window);
+    window.__xssProbe = { authorization: null };
+    window.fetch = (input, init = {}) => {
+      const headers = new Headers(
+        init.headers ?? (input instanceof Request ? input.headers : undefined),
+      );
+      const authorization = headers.get("Authorization");
+      if (authorization) {
+        window.__xssProbe.authorization = authorization;
+      }
+      return originalFetch(input, init);
+    };
+  });
+
+  await page.locator("#call-api").click();
+  await page.waitForFunction(() => {
+    const text = document.querySelector("#result")?.textContent ?? "";
+    return text.includes('"httpStatus": 200');
+  });
+
+  const capturedAuthorization = await page.evaluate(
+    () => window.__xssProbe.authorization,
+  );
+  assert.match(capturedAuthorization, /^Bearer /u);
+  const accessToken = capturedAuthorization.slice("Bearer ".length);
+  assert.equal(accessToken, firstTokenSet.access_token);
+
+  const payload = JSON.parse(
+    Buffer.from(accessToken.split(".")[1], "base64url").toString("utf8"),
+  );
+  const audiences = Array.isArray(payload.aud) ? payload.aud : [payload.aud];
+  assert.ok(audiences.includes("keycloak-pattern-api"));
+
+  const storageSnapshot = await page.evaluate(() => ({
+    localStorage: Object.values(localStorage),
+    sessionStorage: Object.values(sessionStorage),
+  }));
+  assert.equal(JSON.stringify(storageSnapshot).includes(accessToken), false);
+  assert.ok(capturedAuthorization);
+
+  if (process.env.WRONG_AUDIENCE_URL) {
+    assert.equal(
+      (await callResource(accessToken, process.env.WRONG_AUDIENCE_URL)).status,
+      401,
+    );
+  }
+  if (process.env.WRONG_ISSUER_URL) {
+    assert.equal(
+      (await callResource(accessToken, process.env.WRONG_ISSUER_URL)).status,
+      401,
+    );
+  }
+
+  const logoutRequestPromise = page.waitForRequest((request) =>
+    request.url().includes("/protocol/openid-connect/logout"),
+  );
+  await page.locator("#logout").click();
+  const logoutRequest = await logoutRequestPromise;
+  assert.ok(new URL(logoutRequest.url()).searchParams.get("id_token_hint"));
+  await page.waitForURL(frontendUrl);
+  await page.locator('[data-authenticated="false"]').waitFor();
+
+  const secondTokenSet = await login(page);
+  const rotatedResponse = await refresh(secondTokenSet.refresh_token);
+  assert.equal(rotatedResponse.status, 200);
+  const rotated = await rotatedResponse.json();
+  assert.ok(rotated.refresh_token);
+  assert.notEqual(rotated.refresh_token, secondTokenSet.refresh_token);
+
+  const reusedOldResponse = await refresh(secondTokenSet.refresh_token);
+  assert.notEqual(
+    reusedOldResponse.status,
+    200,
+    "a consumed refresh token must not be accepted again",
+  );
+
+  const rotatedAfterReuseResponse = await refresh(rotated.refresh_token);
+  const rotatedAfterReuseStatus = rotatedAfterReuseResponse.status;
+  assert.ok([200, 400, 401].includes(rotatedAfterReuseStatus));
+
+  assert.equal(
+    (await callResource(rotated.access_token)).status,
+    200,
+    "a locally validated access JWT remains usable until exp",
+  );
+
+  await context.clearCookies();
+  await page.reload();
+  await page.locator('[data-authenticated="false"]').waitFor();
+  const thirdTokenSet = await login(page);
+
+  const revokeResponse = await postForm(revokeEndpoint, {
+    token: thirdTokenSet.refresh_token,
+    token_type_hint: "refresh_token",
+    client_id: "spa-public",
+  });
+  assert.equal(revokeResponse.status, 200);
+  assert.notEqual((await refresh(thirdTokenSet.refresh_token)).status, 200);
+  assert.equal(
+    (await callResource(thirdTokenSet.access_token)).status,
+    200,
+    "refresh revoke is not an immediate deny-list for a stateless access JWT",
+  );
+
+  await page.reload();
+  await page.locator('[data-authenticated="false"]').waitFor();
+  assert.equal(
+    await page.evaluate(
+      (token) => JSON.stringify({
+        localStorage: Object.values(localStorage),
+        sessionStorage: Object.values(sessionStorage),
+      }).includes(token),
+      thirdTokenSet.access_token,
+    ),
+    false,
+  );
+
+  console.log(
+    "pattern1 verified: PKCE, aud/iss negatives, memory/XSS boundary, logout, RT rotation/reuse, revoke-vs-stateless JWT"
+      + ` (RT2 after RT1 reuse: ${rotatedAfterReuseStatus})`,
+  );
+} finally {
+  await browser.close();
+}

e2e/pattern3.mjs

@@ -1,198 +0,0 @@
-import assert from "node:assert/strict";
-import { chromium } from "playwright-core";
-
-const password = process.env.E2E_PASSWORD;
-assert.ok(password, "E2E_PASSWORD must be set");
-
-async function completeKeycloakLogin(page) {
-  for (let attempt = 1; attempt <= 2; attempt += 1) {
-    await page.locator("#username").fill(
-      process.env.E2E_USERNAME ?? "regular-user",
-    );
-    await page.locator("#password").fill(password);
-    await page.locator("#kc-login").click();
-    await page.waitForLoadState("domcontentloaded");
-
-    if (page.url() === "http://localhost:8083/") {
-      return;
-    }
-    if (attempt === 1) {
-      await page.goto(
-        "http://localhost:8083/oauth2/authorization/keycloak",
-      );
-      await page.waitForURL(/localhost:8080/u);
-    }
-  }
-  throw new Error(`Keycloak login did not return to AP3: ${page.url()}`);
-}
-
-const browser = await chromium.launch({
-  executablePath: process.env.CHROME_BIN ?? "/usr/bin/google-chrome",
-  headless: true,
-  args: ["--no-sandbox"],
-});
-
-try {
-  const context = await browser.newContext();
-  const page = await context.newPage();
-  const browserRequests = [];
-  page.on("request", (request) =>
-    browserRequests.push({ method: request.method(), url: request.url() }),
-  );
-
-  await page.goto("http://localhost:8083");
-  const authorizationRequestPromise = page.waitForRequest((request) =>
-    request.url().includes(
-      "/protocol/openid-connect/auth?response_type=code",
-    ),
-  );
-  await page.locator("#login").click();
-  const authorizationRequest = await authorizationRequestPromise;
-  const authorizationUrl = new URL(authorizationRequest.url());
-  assert.equal(authorizationUrl.searchParams.get("client_id"), "bff-confidential");
-  assert.equal(authorizationUrl.searchParams.get("code_challenge_method"), "S256");
-  assert.ok(authorizationUrl.searchParams.get("code_challenge"));
-
-  await page.waitForURL(/localhost:8080/u);
-  await completeKeycloakLogin(page);
-  const callbackRequest = browserRequests.find(({ url }) =>
-    url.startsWith("http://localhost:8083/login/oauth2/code/keycloak?"),
-  );
-  assert.ok(callbackRequest, "authorization response must use the BFF callback");
-  assert.equal(callbackRequest.method, "GET");
-
-  const boundaryResponsePromise = page.waitForResponse((response) =>
-    response.url().endsWith("/bff/token-boundary"),
-  );
-  await page.locator("#inspect").click();
-  const boundaryResponse = await boundaryResponsePromise;
-  assert.equal(boundaryResponse.status(), 200);
-  const boundary = await boundaryResponse.json();
-  assert.equal(boundary.accessTokenStoredOnServer, true);
-  assert.equal(boundary.refreshTokenStoredOnServer, true);
-  assert.equal(boundary.browserTokenCount, 0);
-  assert.equal(boundary.csrfProtectionEnabled, true);
-  assert.equal(JSON.stringify(boundary).includes("access_token"), false);
-  assert.equal(JSON.stringify(boundary).includes("refresh_token"), false);
-
-  const proxyResponsePromise = page.waitForResponse((response) =>
-    response.url().endsWith("/bff/api/me"),
-  );
-  await page.locator("#call-bff").click();
-  const proxyResponse = await proxyResponsePromise;
-  assert.equal(proxyResponse.status(), 200);
-  const resource = await proxyResponse.json();
-  assert.equal(resource.username, "regular-user");
-  assert.ok(resource.audience.includes("keycloak-pattern-api"));
-
-  assert.equal(
-    browserRequests.some(({ url }) =>
-      url.startsWith("http://localhost:8081/"),
-    ),
-    false,
-    "the browser must not bypass the BFF",
-  );
-  assert.equal(
-    browserRequests.some(({ url }) =>
-      url.includes("/protocol/openid-connect/token"),
-    ),
-    false,
-    "the token exchange must be server-to-server",
-  );
-
-  const cookies = await context.cookies("http://localhost:8083/");
-  const sessionCookie = cookies.find((cookie) => cookie.name === "AP3_SESSION");
-  assert.ok(sessionCookie);
-  assert.equal(sessionCookie.httpOnly, true);
-  assert.equal(sessionCookie.sameSite, "Lax");
-
-  const storage = await page.evaluate(() => ({
-    localStorage: Object.values(localStorage),
-    sessionStorage: Object.values(sessionStorage),
-    readableCookies: document.cookie,
-  }));
-  assert.deepEqual(storage.localStorage, []);
-  assert.deepEqual(storage.sessionStorage, []);
-  assert.equal(storage.readableCookies.includes("AP3_SESSION"), false);
-
-  const missingCsrfResponse = await page.evaluate(async () => {
-    const response = await fetch("/bff/api/preferences", {
-      method: "POST",
-      body: new URLSearchParams({ theme: "missing-csrf" }),
-      headers: { "Content-Type": "application/x-www-form-urlencoded" },
-    });
-    return response.status;
-  });
-  assert.equal(missingCsrfResponse, 403);
-
-  const csrfResponsePromise = page.waitForResponse((response) =>
-    response.url().endsWith("/bff/csrf"),
-  );
-  const validChangeResponsePromise = page.waitForResponse(
-    (response) =>
-      response.url().endsWith("/bff/api/preferences") &&
-      response.request().method() === "POST" &&
-      response.status() === 200,
-  );
-  await page.locator("#change-with-csrf").click();
-  const csrfResponse = await csrfResponsePromise;
-  const validChangeResponse = await validChangeResponsePromise;
-  assert.equal(csrfResponse.status(), 200);
-  assert.equal(validChangeResponse.status(), 200);
-  const validChange = await validChangeResponse.json();
-  assert.equal(validChange.theme, "dark");
-
-  const csrfCookies = await context.cookies("http://localhost:8083/");
-  const csrfCookie = csrfCookies.find((cookie) => cookie.name === "XSRF-TOKEN");
-  assert.ok(csrfCookie);
-  assert.equal(csrfCookie.httpOnly, false);
-
-  await page.goto("http://localhost:8088");
-  const [forgedResponse] = await Promise.all([
-    page.waitForNavigation(),
-    page.evaluate(() => {
-      const form = document.createElement("form");
-      form.method = "POST";
-      form.action = "http://localhost:8083/bff/api/preferences";
-      const input = document.createElement("input");
-      input.name = "theme";
-      input.value = "attacker";
-      form.append(input);
-      document.body.append(form);
-      form.submit();
-    }),
-  ]);
-  assert.ok(forgedResponse);
-  assert.equal(forgedResponse.status(), 403);
-
-  await page.goto("http://127.0.0.1:8088");
-  const crossSiteRequestPromise = page.waitForRequest(
-    (request) =>
-      request.url() === "http://localhost:8083/bff/api/preferences" &&
-      request.method() === "POST",
-  );
-  await page.evaluate(() => {
-    const form = document.createElement("form");
-    form.method = "POST";
-    form.action = "http://localhost:8083/bff/api/preferences";
-    const input = document.createElement("input");
-    input.name = "theme";
-    input.value = "cross-site-attacker";
-    form.append(input);
-    document.body.append(form);
-    form.submit();
-  });
-  const crossSiteRequest = await crossSiteRequestPromise;
-  const crossSiteHeaders = await crossSiteRequest.allHeaders();
-  assert.equal(
-    (crossSiteHeaders.cookie ?? "").includes("AP3_SESSION="),
-    false,
-    "SameSite=Lax must omit the session cookie on a cross-site POST",
-  );
-
-  console.log(
-    "pattern3 BFF verified: tokenless POST 403, CSRF header 200, SameSite=Lax session",
-  );
-} finally {
-  await browser.close();
-}

e2e/role-mapping.mjs

@@ -0,0 +1,65 @@
+import assert from "node:assert/strict";
+import { chromium } from "playwright-core";
+
+const keycloakUrl = "http://localhost:8080";
+const frontendUrl = "http://localhost:8088/";
+
+async function accessToken(browser, username, password) {
+  const context = await browser.newContext();
+  const page = await context.newPage();
+  await page.goto(frontendUrl);
+  const tokenResponse = page.waitForResponse((response) =>
+    response.url().includes("/protocol/openid-connect/token")
+    && response.request().postData()?.includes("grant_type=authorization_code"),
+  );
+  await page.locator("#login").click();
+  await page.locator("#username").fill(username);
+  await page.locator("#password").fill(password);
+  await page.locator("#kc-login").click();
+  const response = await tokenResponse;
+  assert.equal(response.status(), 200);
+  const token = (await response.json()).access_token;
+  await context.close();
+  return token;
+}
+
+async function adminStatus(token) {
+  return (
+    await fetch("http://localhost:8081/api/admin", {
+      headers: { Authorization: `Bearer ${token}` },
+    })
+  ).status;
+}
+
+const regularPassword = process.env.REGULAR_USER_PASSWORD;
+const adminPassword = process.env.ADMIN_USER_PASSWORD;
+assert.ok(regularPassword && adminPassword);
+
+const browser = await chromium.launch({
+  executablePath: process.env.CHROME_BIN ?? "/usr/bin/google-chrome",
+  headless: true,
+  args: ["--no-sandbox"],
+});
+
+try {
+  const regularToken = await accessToken(
+    browser,
+    "regular-user",
+    regularPassword,
+  );
+  const regularPayload = JSON.parse(
+    Buffer.from(regularToken.split(".")[1], "base64url").toString(),
+  );
+  assert.ok(regularPayload.realm_access.roles.includes("user-role"));
+  assert.equal(await adminStatus(regularToken), 403);
+
+  const adminToken = await accessToken(browser, "admin-user", adminPassword);
+  const adminPayload = JSON.parse(
+    Buffer.from(adminToken.split(".")[1], "base64url").toString(),
+  );
+  assert.ok(adminPayload.realm_access.roles.includes("admin-role"));
+  assert.equal(await adminStatus(adminToken), 200);
+  console.log("Spring RBAC verified: realm role -> ROLE_ authority -> 403/200");
+} finally {
+  await browser.close();
+}

frontend/Dockerfile

@@ -1,4 +1,16 @@
+FROM node:24-alpine AS build
+
+WORKDIR /workspace
+
+COPY package.json package-lock.json ./
+RUN npm ci
+
+COPY src ./src
+COPY test ./test
+RUN npm test && npm run build
+
 FROM nginx:1.29-alpine
 
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 COPY index.html /usr/share/nginx/html/index.html
+COPY --from=build /workspace/dist/app.js /usr/share/nginx/html/app.js

frontend/index.html

@@ -3,31 +3,66 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Keycloak Authentication Patterns</title>
+  <meta name="referrer" content="no-referrer">
+  <title>AP1 · SPA Direct + Resource Server</title>
   <style>
     :root {
       color-scheme: light dark;
       font-family: system-ui, sans-serif;
     }
     body {
-      max-width: 48rem;
+      max-width: 56rem;
-      margin: 8vh auto;
+      margin: 6vh auto;
       padding: 0 1.5rem;
-      line-height: 1.6;
+      line-height: 1.55;
+    }
+    button {
+      margin: 0 0.5rem 0.5rem 0;
+      padding: 0.6rem 0.9rem;
+      cursor: pointer;
+    }
+    code, pre {
+      border-radius: 0.35rem;
+      background: color-mix(in srgb, CanvasText 9%, Canvas);
     }
     code {
-      padding: 0.15rem 0.35rem;
+      padding: 0.1rem 0.3rem;
-      border-radius: 0.25rem;
+    }
-      background: color-mix(in srgb, CanvasText 10%, Canvas);
+    pre {
+      min-height: 8rem;
+      padding: 1rem;
+      overflow: auto;
+      white-space: pre-wrap;
+    }
+    .notice {
+      border-left: 0.3rem solid #e09f3e;
+      padding-left: 1rem;
     }
   </style>
 </head>
 <body>
-  <h1>Keycloak Authentication Patterns</h1>
+  <main>
-  <p>공통 Docker Compose baseline이 실행 중입니다.</p>
+    <h1>AP1 · SPA Direct + Resource Server</h1>
     <p>
-    공개 API는 <code>/api/public</code>, 보호 API는
+      바닐라 JavaScript SPA가 <code>spa-public</code> client로 Authorization
-    <code>/api/me</code>에서 확인할 수 있습니다.
+      Code + PKCE를 수행하고, access token을 직접 Spring Resource Server에
+      전달합니다.
     </p>
+    <p class="notice">
+      access/refresh token은 메모리에만 존재합니다. 새로고침하면 사라지는 것이
+      이 패턴의 의도된 보안 경계입니다.
+    </p>
+
+    <section>
+      <button id="login" type="button">Keycloak 로그인</button>
+      <button id="call-api" type="button" disabled>보호 API 호출</button>
+      <button id="pkce-demo" type="button">수동 PKCE 생성</button>
+      <button id="logout" type="button" disabled>로그아웃</button>
+    </section>
+
+    <p id="session-state" data-authenticated="false">세션 확인 중…</p>
+    <pre id="result" aria-live="polite"></pre>
+  </main>
+  <script type="module" src="/app.js"></script>
 </body>
 </html>

frontend/nginx.conf

@@ -21,6 +21,7 @@ server {
     }
 
     location / {
+        add_header Cache-Control "no-store";
         try_files $uri $uri/ /index.html;
     }
 }

frontend/package-lock.json

@@ -0,0 +1,523 @@
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+  "name": "keycloak-pattern1-spa",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "keycloak-pattern1-spa",
+      "version": "1.0.0",
+      "dependencies": {
+        "oidc-client-ts": "3.5.0"
+      },
+      "devDependencies": {
+        "esbuild": "0.28.1"
+      }
+    },
+    "node_modules/@esbuild/aix-ppc64": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.28.1.tgz",
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+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "aix"
+      ],
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+      }
+    },
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+        "node": ">=18"
+      }
+    },
+    "node_modules/esbuild": {
+      "version": "0.28.1",
+      "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.28.1.tgz",
+      "integrity": "sha512-HrJrvZv5ayxBzPfwphOoNzkzOIIlifzk0KJrGK2c8R4+LKpMtpYLQeUdjnwjWv/LZlkH2laZk+4w78pi99D4Vw==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "bin": {
+        "esbuild": "bin/esbuild"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
+        "@esbuild/aix-ppc64": "0.28.1",
+        "@esbuild/android-arm": "0.28.1",
+        "@esbuild/android-arm64": "0.28.1",
+        "@esbuild/android-x64": "0.28.1",
+        "@esbuild/darwin-arm64": "0.28.1",
+        "@esbuild/darwin-x64": "0.28.1",
+        "@esbuild/freebsd-arm64": "0.28.1",
+        "@esbuild/freebsd-x64": "0.28.1",
+        "@esbuild/linux-arm": "0.28.1",
+        "@esbuild/linux-arm64": "0.28.1",
+        "@esbuild/linux-ia32": "0.28.1",
+        "@esbuild/linux-loong64": "0.28.1",
+        "@esbuild/linux-mips64el": "0.28.1",
+        "@esbuild/linux-ppc64": "0.28.1",
+        "@esbuild/linux-riscv64": "0.28.1",
+        "@esbuild/linux-s390x": "0.28.1",
+        "@esbuild/linux-x64": "0.28.1",
+        "@esbuild/netbsd-arm64": "0.28.1",
+        "@esbuild/netbsd-x64": "0.28.1",
+        "@esbuild/openbsd-arm64": "0.28.1",
+        "@esbuild/openbsd-x64": "0.28.1",
+        "@esbuild/openharmony-arm64": "0.28.1",
+        "@esbuild/sunos-x64": "0.28.1",
+        "@esbuild/win32-arm64": "0.28.1",
+        "@esbuild/win32-ia32": "0.28.1",
+        "@esbuild/win32-x64": "0.28.1"
+      }
+    },
+    "node_modules/jwt-decode": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/jwt-decode/-/jwt-decode-4.0.0.tgz",
+      "integrity": "sha512-+KJGIyHgkGuIq3IEBNftfhW/LfWhXUIY6OmyVWjliu5KH1y0fw7VQ8YndE2O4qZdMSd9SqbnC8GOcZEy0Om7sA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/oidc-client-ts": {
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/oidc-client-ts/-/oidc-client-ts-3.5.0.tgz",
+      "integrity": "sha512-l2q8l9CTCTOlbX+AnK4p3M+4CEpKpyQhle6blQkdFhm0IsBqsxm15bYaSa11G7pWdsYr6epdsRZxJpCyCRbT8A==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jwt-decode": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    }
+  }
+}

frontend/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "keycloak-pattern1-spa",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "build": "esbuild src/app.js --bundle --format=esm --outfile=dist/app.js --minify --sourcemap",
+    "test": "node --test test/*.test.mjs"
+  },
+  "dependencies": {
+    "oidc-client-ts": "3.5.0"
+  },
+  "devDependencies": {
+    "esbuild": "0.28.1"
+  }
+}

frontend/src/account-linking.js

@@ -0,0 +1,38 @@
+function base64Url(bytes) {
+  let binary = "";
+  for (const byte of bytes) {
+    binary += String.fromCharCode(byte);
+  }
+  return btoa(binary)
+    .replaceAll("+", "-")
+    .replaceAll("/", "_")
+    .replaceAll("=", "");
+}
+
+export async function createAccountLinkUrl({
+  keycloakBaseUrl,
+  realm,
+  provider,
+  clientId,
+  redirectUri,
+  sessionState,
+  issuedFor,
+  nonce = crypto.randomUUID(),
+  cryptoApi = crypto,
+}) {
+  const material = `${nonce}${sessionState}${issuedFor}${provider}`;
+  const digest = await cryptoApi.subtle.digest(
+    "SHA-256",
+    new TextEncoder().encode(material),
+  );
+  const url = new URL(
+    `${keycloakBaseUrl}/realms/${realm}/broker/${provider}/link`,
+  );
+  url.search = new URLSearchParams({
+    nonce,
+    hash: base64Url(new Uint8Array(digest)),
+    client_id: clientId,
+    redirect_uri: redirectUri,
+  });
+  return url;
+}

frontend/src/app.js

@@ -0,0 +1,131 @@
+import {
+  InMemoryWebStorage,
+  UserManager,
+  WebStorageStateStore,
+} from "oidc-client-ts";
+
+import { createPkcePair } from "./pkce.js";
+
+const authority = "http://localhost:8080/realms/keycloak-patterns";
+const backendBaseUrl = "http://localhost:8081";
+
+const userManager = new UserManager({
+  authority,
+  client_id: "spa-public",
+  redirect_uri: "http://localhost:8088/callback.html",
+  post_logout_redirect_uri: "http://localhost:8088/",
+  response_type: "code",
+  scope: "openid profile email",
+  automaticSilentRenew: true,
+  monitorSession: false,
+  loadUserInfo: false,
+  userStore: new WebStorageStateStore({
+    store: new InMemoryWebStorage(),
+  }),
+  stateStore: new WebStorageStateStore({
+    store: window.sessionStorage,
+  }),
+});
+
+const loginButton = document.querySelector("#login");
+const logoutButton = document.querySelector("#logout");
+const apiButton = document.querySelector("#call-api");
+const pkceButton = document.querySelector("#pkce-demo");
+const sessionState = document.querySelector("#session-state");
+const result = document.querySelector("#result");
+
+let currentUser = null;
+
+function renderJson(value) {
+  result.textContent = JSON.stringify(value, null, 2);
+}
+
+function tokenMetadata(user) {
+  return {
+    subject: user.profile.sub,
+    username: user.profile.preferred_username,
+    expiresAt: new Date(user.expires_at * 1000).toISOString(),
+    accessTokenHeldBy: "browser memory",
+    refreshTokenHeldBy: user.refresh_token ? "browser memory" : "not issued",
+  };
+}
+
+function renderSession(user) {
+  currentUser = user;
+  const authenticated = Boolean(user && !user.expired);
+  sessionState.dataset.authenticated = String(authenticated);
+  sessionState.textContent = authenticated
+    ? `${user.profile.preferred_username} 로그인됨 · token은 메모리에만 보관`
+    : "로그인되지 않음 · 브라우저 저장소에 token 없음";
+  loginButton.disabled = authenticated;
+  logoutButton.disabled = !authenticated;
+  apiButton.disabled = !authenticated;
+
+  if (authenticated) {
+    renderJson(tokenMetadata(user));
+  }
+}
+
+async function finishSigninCallback() {
+  const params = new URLSearchParams(window.location.search);
+  const isCallback = window.location.pathname === "/callback.html"
+    && (params.has("code") || params.has("error"));
+
+  if (!isCallback) {
+    return null;
+  }
+
+  const user = await userManager.signinRedirectCallback();
+  window.history.replaceState({}, document.title, "/");
+  return user;
+}
+
+async function callProtectedApi() {
+  if (!currentUser || currentUser.expired) {
+    throw new Error("로그인이 필요합니다.");
+  }
+
+  const response = await fetch(`${backendBaseUrl}/api/me`, {
+    headers: {
+      Authorization: `Bearer ${currentUser.access_token}`,
+    },
+  });
+  const body = await response.json();
+  renderJson({
+    httpStatus: response.status,
+    resourceServerResponse: body,
+    tokenBoundary: tokenMetadata(currentUser),
+  });
+
+  if (!response.ok) {
+    throw new Error(`보호 API가 ${response.status}를 반환했습니다.`);
+  }
+}
+
+loginButton.addEventListener("click", () => userManager.signinRedirect());
+logoutButton.addEventListener("click", () => userManager.signoutRedirect());
+apiButton.addEventListener("click", () => {
+  callProtectedApi().catch((error) => renderJson({ error: error.message }));
+});
+pkceButton.addEventListener("click", () => {
+  createPkcePair()
+    .then(({ verifier, challenge, method }) => renderJson({
+      method,
+      verifierLength: verifier.length,
+      challengeLength: challenge.length,
+      note: "실제 로그인에서는 oidc-client-ts가 같은 S256 단계를 수행합니다.",
+    }))
+    .catch((error) => renderJson({ error: error.message }));
+});
+
+userManager.events.addUserLoaded(renderSession);
+userManager.events.addUserUnloaded(() => renderSession(null));
+userManager.events.addAccessTokenExpired(() => renderSession(null));
+
+try {
+  const callbackUser = await finishSigninCallback();
+  renderSession(callbackUser ?? await userManager.getUser());
+} catch (error) {
+  renderSession(null);
+  renderJson({ error: error.message });
+}

frontend/src/pkce.js

@@ -0,0 +1,26 @@
+function base64Url(bytes) {
+  let binary = "";
+  for (const byte of bytes) {
+    binary += String.fromCharCode(byte);
+  }
+  return btoa(binary)
+    .replaceAll("+", "-")
+    .replaceAll("/", "_")
+    .replace(/=+$/u, "");
+}
+
+export async function createPkcePair(cryptoApi = globalThis.crypto) {
+  const verifierBytes = new Uint8Array(32);
+  cryptoApi.getRandomValues(verifierBytes);
+  const verifier = base64Url(verifierBytes);
+  const digest = await cryptoApi.subtle.digest(
+    "SHA-256",
+    new TextEncoder().encode(verifier),
+  );
+
+  return {
+    verifier,
+    challenge: base64Url(new Uint8Array(digest)),
+    method: "S256",
+  };
+}

frontend/test/account-linking.test.mjs

@@ -0,0 +1,25 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+const { createAccountLinkUrl } = await import("../src/account-linking.js");
+
+test("creates a signed client-initiated account-link URL", async () => {
+  const url = await createAccountLinkUrl({
+    keycloakBaseUrl: "https://auth.example.test",
+    realm: "keycloak-patterns",
+    provider: "google",
+    clientId: "spa-public",
+    redirectUri: "https://app.example.test/settings/identity",
+    sessionState: "session-state",
+    issuedFor: "spa-public",
+    nonce: "fixed-nonce",
+  });
+
+  assert.equal(
+    url.pathname,
+    "/realms/keycloak-patterns/broker/google/link",
+  );
+  assert.equal(url.searchParams.get("client_id"), "spa-public");
+  assert.equal(url.searchParams.get("nonce"), "fixed-nonce");
+  assert.match(url.searchParams.get("hash"), /^[A-Za-z0-9_-]{43}$/u);
+});

frontend/test/pkce.test.mjs

@@ -0,0 +1,18 @@
+import assert from "node:assert/strict";
+import { webcrypto } from "node:crypto";
+import test from "node:test";
+
+globalThis.btoa = (value) => Buffer.from(value, "binary").toString("base64");
+
+const { createPkcePair } = await import("../src/pkce.js");
+
+test("manual PKCE helper creates an RFC 7636 S256 pair", async () => {
+  const pair = await createPkcePair(webcrypto);
+
+  assert.equal(pair.method, "S256");
+  assert.equal(pair.verifier.length, 43);
+  assert.equal(pair.challenge.length, 43);
+  assert.match(pair.verifier, /^[A-Za-z0-9_-]+$/u);
+  assert.match(pair.challenge, /^[A-Za-z0-9_-]+$/u);
+  assert.notEqual(pair.verifier, pair.challenge);
+});

keycloak/import/keycloak-patterns-realm.json

@@ -55,7 +55,22 @@
       "attributes": {
         "pkce.code.challenge.method": "S256",
         "post.logout.redirect.uris": "http://localhost:8088/*##http://127.0.0.1:8088/*"
+      },
+      "protocolMappers": [
+        {
+          "name": "keycloak-pattern-api-audience",
+          "protocol": "openid-connect",
+          "protocolMapper": "oidc-audience-mapper",
+          "consentRequired": false,
+          "config": {
+            "included.custom.audience": "keycloak-pattern-api",
+            "id.token.claim": "false",
+            "access.token.claim": "true",
+            "userinfo.token.claim": "false",
+            "introspection.token.claim": "true"
           }
+        }
+      ]
     },
     {
       "clientId": "token-mediating-confidential",
@@ -102,24 +117,8 @@
         "http://localhost:8083"
       ],
       "attributes": {
-        "pkce.code.challenge.method": "S256",
         "post.logout.redirect.uris": "http://localhost:8083/*"
-      },
-      "protocolMappers": [
-        {
-          "name": "keycloak-pattern-api-audience",
-          "protocol": "openid-connect",
-          "protocolMapper": "oidc-audience-mapper",
-          "consentRequired": false,
-          "config": {
-            "included.custom.audience": "keycloak-pattern-api",
-            "id.token.claim": "false",
-            "access.token.claim": "true",
-            "userinfo.token.claim": "false",
-            "introspection.token.claim": "true"
       }
-        }
-      ]
     },
     {
       "clientId": "edge-proxy",

scripts/validate-realm.py

@@ -70,6 +70,18 @@ def validate(path: Path, runtime: bool) -> None:
         spa.get("attributes", {}).get("pkce.code.challenge.method") == "S256",
         "spa-public must enforce PKCE S256",
     )
+    audience_mappers = [
+        mapper
+        for mapper in spa.get("protocolMappers", [])
+        if mapper.get("protocolMapper") == "oidc-audience-mapper"
+    ]
+    if not runtime:
+        require(len(audience_mappers) == 1, "spa-public must declare one audience mapper")
+        require(
+            audience_mappers[0].get("config", {}).get("included.custom.audience")
+            == "keycloak-pattern-api",
+            "spa-public access token must target keycloak-pattern-api",
+        )
 
     for client_id, placeholder in CONFIDENTIAL_CLIENTS.items():
         client = clients[client_id]

scripts/verify-federation-spa-zero-change.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env sh
+set -eu
+
+set -a
+. ./.env
+set +a
+
+./scripts/set-first-broker-login-mode.sh secure
+npm --prefix e2e ci
+MOCK_GOOGLE_USER_PASSWORD="$MOCK_GOOGLE_USER_PASSWORD" \
+  npm --prefix e2e run test:federation-zero-change

scripts/verify-internal-spa-no-google-contract.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+set -eu
+
+jq -e '
+  (.clients[] | select(.clientId == "spa-public")
+    | .publicClient == true
+      and .attributes["pkce.code.challenge.method"] == "S256")
+  and
+  ([.users[].username] | index("regular-user") != null)
+' keycloak/import/keycloak-patterns-realm.json >/dev/null
+
+npm --prefix frontend test
+echo "AP1 local-identity profile verified without a Google dependency"

scripts/verify-pattern1.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env sh
+set -eu
+
+if [ ! -f .env ]; then
+  echo "missing .env; copy .env.example and set local-only values" >&2
+  exit 1
+fi
+
+set -a
+. ./.env
+set +a
+
+docker compose down --volumes --remove-orphans
+docker compose up --build -d --wait
+docker compose --profile diagnostics up -d --wait \
+  app-wrong-audience \
+  app-wrong-issuer
+
+npm --prefix e2e ci
+E2E_USERNAME=regular-user \
+E2E_PASSWORD="$REGULAR_USER_PASSWORD" \
+WRONG_AUDIENCE_URL=http://localhost:18081/api/me \
+WRONG_ISSUER_URL=http://localhost:18082/api/me \
+  npm --prefix e2e run test:pattern1
+
+echo "AP1 verified end to end"

scripts/verify-pattern3.sh

@@ -1,21 +0,0 @@
-#!/usr/bin/env sh
-set -eu
-
-if [ ! -f .env ]; then
-  echo "missing .env; copy .env.example and set development values" >&2
-  exit 1
-fi
-
-set -a
-. ./.env
-set +a
-
-docker compose down --volumes --remove-orphans
-docker compose up --build -d --wait
-
-npm --prefix e2e ci
-E2E_USERNAME=regular-user \
-E2E_PASSWORD="$REGULAR_USER_PASSWORD" \
-  npm --prefix e2e run test:pattern3
-
-echo "AP3 BFF session and CSRF behavior verified"

scripts/verify-pkce-flow-stages.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env sh
+set -eu
+
+npm --prefix frontend ci
+npm --prefix frontend test
+
+jq -e '
+  .clients[]
+  | select(.clientId == "spa-public")
+  | .publicClient == true
+    and .standardFlowEnabled == true
+    and .implicitFlowEnabled == false
+    and .directAccessGrantsEnabled == false
+    and .attributes["pkce.code.challenge.method"] == "S256"
+' keycloak/import/keycloak-patterns-realm.json >/dev/null
+
+rg -q 'response_type: "code"' frontend/src/app.js
+rg -q 'new InMemoryWebStorage' frontend/src/app.js
+rg -Fq 'cryptoApi.subtle.digest(' frontend/src/pkce.js
+rg -Fq '"SHA-256"' frontend/src/pkce.js
+echo "PKCE stages verified: verifier -> S256 challenge -> code -> verifier exchange"

scripts/verify-refresh-token-rotation-contract.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+set -eu
+
+jq -e '
+  .revokeRefreshToken == true
+  and .refreshTokenMaxReuse == 0
+  and .accessTokenLifespan <= 300
+' keycloak/import/keycloak-patterns-realm.json >/dev/null
+
+rg -Fq 'assert.notEqual(rotated.refresh_token, secondTokenSet.refresh_token)' \
+  e2e/pattern1.mjs
+rg -Fq 'a consumed refresh token must not be accepted again' e2e/pattern1.mjs
+rg -Fq 'refresh revoke is not an immediate deny-list' e2e/pattern1.mjs
+
+echo "Refresh rotation/reuse/revocation contract verified"
+echo "Run ./scripts/verify-pattern1.sh for the destructive live-token E2E"

scripts/verify-spring-role-mapping.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+set -eu
+
+set -a
+. ./.env
+set +a
+
+docker compose down --volumes --remove-orphans
+docker compose up --build -d --wait
+npm --prefix e2e ci
+REGULAR_USER_PASSWORD="$REGULAR_USER_PASSWORD" \
+ADMIN_USER_PASSWORD="$ADMIN_USER_PASSWORD" \
+  npm --prefix e2e run test:role-mapping