feat: any user who accesses the system has the anonymous role (#2443)

#### What type of PR is this?
/kind improvement
/area core
/milestone 2.0

#### What this PR does / why we need it:
- 未认证用户在系统中被定义为匿名用户(username=anonymousUser)，它在授权系统中具有 principle=anonymousUser 且 role=anonymous，key=[secure randomly generated key]
- 未认证用户和已认证用户都将被赋予一个匿名用户角色

参考：
- [Spring security#ServerHttpSecurity.AnonymousSpec](70460ca009/config/src/main/java/org/springframework/security/config/web/server/ServerHttpSecurity.java (L4387))
- [Spring security reactive AnonymousAuthenticationWebFilter](70460ca009/web/src/main/java/org/springframework/security/web/server/authentication/AnonymousAuthenticationWebFilter.java (L46))


#### Which issue(s) this PR fixes:

Fixes #

#### Special notes for your reviewer:
/cc @halo-dev/sig-halo 
#### Does this PR introduce a user-facing change?
```release-note
None
```

src/main/java/run/halo/app/config/WebServerSecurityConfig.java

@@ -34,6 +34,7 @@ import org.springframework.web.reactive.function.server.ServerResponse;
 import run.halo.app.core.extension.service.RoleService;
 import run.halo.app.core.extension.service.UserService;
 import run.halo.app.extension.ReactiveExtensionClient;
+import run.halo.app.infra.AnonymousUserConst;
 import run.halo.app.infra.properties.HaloProperties;
 import run.halo.app.infra.properties.JwtProperties;
 import run.halo.app.security.DefaultUserDetailService;
@@ -68,6 +69,10 @@ public class WebServerSecurityConfig {
             .securityMatcher(pathMatchers("/api/**", "/apis/**", "/login", "/logout"))
             .authorizeExchange(exchanges ->
                 exchanges.anyExchange().access(new RequestInfoAuthorizationManager(roleService)))
+            .anonymous(anonymousSpec -> {
+                anonymousSpec.authorities(AnonymousUserConst.Role);
+                anonymousSpec.principal(AnonymousUserConst.PRINCIPAL);
+            })
             .httpBasic(withDefaults())
             .formLogin(withDefaults())
             .logout(withDefaults())

src/main/java/run/halo/app/infra/AnonymousUserConst.java

@@ -0,0 +1,7 @@
+package run.halo.app.infra;
+
+public interface AnonymousUserConst {
+    String PRINCIPAL = "anonymousUser";
+
+    String Role = "anonymous";
+}

src/main/java/run/halo/app/security/authorization/DefaultRuleResolver.java

@@ -19,6 +19,7 @@ import run.halo.app.core.extension.service.DefaultRoleBindingService;
 import run.halo.app.core.extension.service.RoleBindingService;
 import run.halo.app.core.extension.service.RoleService;
 import run.halo.app.extension.MetadataOperator;
+import run.halo.app.infra.AnonymousUserConst;
 import run.halo.app.infra.utils.JsonUtils;
 
 /**
@@ -56,7 +57,10 @@ public class DefaultRuleResolver implements AuthorizationRuleResolver {
         Set<String> roleNamesImmutable =
             roleBindingService.listBoundRoleNames(user.getAuthorities());
         Set<String> roleNames = new HashSet<>(roleNamesImmutable);
+        if (!AnonymousUserConst.PRINCIPAL.equals(user.getUsername())) {
             roleNames.add(AUTHENTICATED_ROLE);
+            roleNames.add(AnonymousUserConst.Role);
+        }
 
         List<Role.PolicyRule> rules = Collections.emptyList();
         for (String roleName : roleNames) {
@@ -84,7 +88,10 @@ public class DefaultRuleResolver implements AuthorizationRuleResolver {
     public Mono<AuthorizingVisitor> visitRules(UserDetails user, RequestInfo requestInfo) {
         var roleNamesImmutable = roleBindingService.listBoundRoleNames(user.getAuthorities());
         var roleNames = new HashSet<>(roleNamesImmutable);
+        if (!AnonymousUserConst.PRINCIPAL.equals(user.getUsername())) {
             roleNames.add(AUTHENTICATED_ROLE);
+            roleNames.add(AnonymousUserConst.Role);
+        }
 
         var record = new AttributesRecord(user, requestInfo);
         var visitor = new AuthorizingVisitor(record);

src/main/java/run/halo/app/security/authorization/RequestInfoAuthorizationManager.java

@@ -3,8 +3,6 @@ package run.halo.app.security.authorization;
 import java.util.List;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.server.reactive.ServerHttpRequest;
-import org.springframework.security.authentication.AuthenticationTrustResolver;
-import org.springframework.security.authentication.AuthenticationTrustResolverImpl;
 import org.springframework.security.authorization.AuthorizationDecision;
 import org.springframework.security.authorization.ReactiveAuthorizationManager;
 import org.springframework.security.core.Authentication;
@@ -20,8 +18,6 @@ import run.halo.app.core.extension.service.RoleService;
 public class RequestInfoAuthorizationManager
     implements ReactiveAuthorizationManager<AuthorizationContext> {
 
-    private final AuthenticationTrustResolver trustResolver = new AuthenticationTrustResolverImpl();
-
     private final AuthorizationRuleResolver ruleResolver;
 
     public RequestInfoAuthorizationManager(RoleService roleService) {
@@ -48,12 +44,7 @@ public class RequestInfoAuthorizationManager
     }
 
     private boolean isGranted(Authentication authentication) {
-        return authentication != null && isNotAnonymous(authentication)
-            && authentication.isAuthenticated();
-    }
-
-    private boolean isNotAnonymous(Authentication authentication) {
-        return !this.trustResolver.isAnonymous(authentication);
+        return authentication != null && authentication.isAuthenticated();
     }
 
     private UserDetails createUserDetails(Authentication authentication) {

src/test/java/run/halo/app/security/authentication/jwt/JwtAuthenticationTest.java

@@ -2,9 +2,12 @@ package run.halo.app.security.authentication.jwt;
 
 import static org.hamcrest.Matchers.containsString;
 import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.lenient;
 import static org.mockito.Mockito.when;
 
 import java.util.List;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
@@ -18,6 +21,7 @@ import reactor.core.publisher.Mono;
 import run.halo.app.core.extension.Role;
 import run.halo.app.core.extension.service.RoleService;
 import run.halo.app.extension.Metadata;
+import run.halo.app.infra.AnonymousUserConst;
 import run.halo.app.security.LoginUtils;
 
 @SpringBootTest
@@ -33,6 +37,12 @@ class JwtAuthenticationTest {
     @MockBean
     RoleService roleService;
 
+    @BeforeEach
+    void setUp() {
+        lenient().when(roleService.getMonoRole(eq(AnonymousUserConst.Role)))
+            .thenReturn(Mono.empty());
+    }
+
     @Test
     void accessProtectedApiWithoutToken() {
         webClient.get().uri("/api/v1/test/hello").exchange().expectStatus().isUnauthorized();

src/test/java/run/halo/app/security/authorization/AuthorizationTest.java

@@ -10,6 +10,7 @@ import static org.springframework.web.reactive.function.server.RequestPredicates
 import static org.springframework.web.reactive.function.server.RequestPredicates.accept;
 import static org.springframework.web.reactive.function.server.RouterFunctions.route;
 
+import java.util.ArrayList;
 import java.util.List;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -24,6 +25,7 @@ import org.springframework.http.MediaType;
 import org.springframework.lang.NonNull;
 import org.springframework.security.core.userdetails.ReactiveUserDetailsService;
 import org.springframework.security.core.userdetails.User;
+import org.springframework.security.test.context.support.WithMockUser;
 import org.springframework.test.web.reactive.server.WebTestClient;
 import org.springframework.web.reactive.function.server.RouterFunction;
 import org.springframework.web.reactive.function.server.ServerRequest;
@@ -32,7 +34,9 @@ import reactor.core.publisher.Mono;
 import run.halo.app.core.extension.Role;
 import run.halo.app.core.extension.Role.PolicyRule;
 import run.halo.app.core.extension.service.RoleService;
+import run.halo.app.extension.Metadata;
 import run.halo.app.extension.exception.ExtensionNotFoundException;
+import run.halo.app.infra.AnonymousUserConst;
 import run.halo.app.security.LoginUtils;
 
 @SpringBootTest
@@ -69,6 +73,8 @@ class AuthorizationTest {
         when(userDetailsService.findByUsername(eq("user"))).thenReturn(Mono.just(
             User.withDefaultPasswordEncoder().username("user").password("password")
                 .roles("post.read").build()));
+        when(roleService.getMonoRole(eq(AnonymousUserConst.Role)))
+            .thenReturn(Mono.empty());
 
         var role = new Role();
         role.setRules(List.of(
@@ -94,6 +100,68 @@ class AuthorizationTest {
         verify(roleService, times(2)).getMonoRole("post.read");
     }
 
+    @Test
+    void anonymousUserAccessProtectedApi() {
+        when(userDetailsService.findByUsername(eq(AnonymousUserConst.PRINCIPAL)))
+            .thenReturn(Mono.empty());
+        when(roleService.getMonoRole(AnonymousUserConst.Role))
+            .thenReturn(Mono.empty());
+        webClient.get().uri("/apis/fake.halo.run/v1/posts").exchange().expectStatus()
+            .isUnauthorized();
+
+        verify(roleService, times(1)).getMonoRole(AnonymousUserConst.Role);
+    }
+
+    @Test
+    void anonymousUserAccessAuthenticationFreeApi() {
+        when(userDetailsService.findByUsername(eq(AnonymousUserConst.PRINCIPAL)))
+            .thenReturn(Mono.empty());
+        Role role = new Role();
+        role.setMetadata(new Metadata());
+        role.getMetadata().setName(AnonymousUserConst.Role);
+        role.setRules(new ArrayList<>());
+        PolicyRule policyRule = new PolicyRule.Builder()
+            .apiGroups("fake.halo.run")
+            .verbs("list")
+            .resources("posts")
+            .build();
+        role.getRules().add(policyRule);
+        when(roleService.getMonoRole(AnonymousUserConst.Role))
+            .thenReturn(Mono.just(role));
+        webClient.get().uri("/apis/fake.halo.run/v1/posts").exchange().expectStatus()
+            .isOk()
+            .expectBody(String.class).isEqualTo("returned posts");
+
+        verify(roleService, times(1)).getMonoRole(AnonymousUserConst.Role);
+
+        webClient.get().uri("/apis/fake.halo.run/v1/posts/hello-halo").exchange()
+            .expectStatus()
+            .isUnauthorized();
+        verify(roleService, times(2)).getMonoRole(AnonymousUserConst.Role);
+    }
+
+    @Test
+    @WithMockUser(username = "user", roles = "post.read")
+    void authenticatedUserAccessAuthenticationFreeApi() {
+        when(roleService.getMonoRole("authenticated")).thenReturn(Mono.empty());
+        when(roleService.getMonoRole("post.read")).thenReturn(Mono.empty());
+        Role role = new Role();
+        role.setMetadata(new Metadata());
+        role.getMetadata().setName(AnonymousUserConst.Role);
+        role.setRules(new ArrayList<>());
+        PolicyRule policyRule = new PolicyRule.Builder()
+            .apiGroups("fake.halo.run")
+            .verbs("list")
+            .resources("posts")
+            .build();
+        role.getRules().add(policyRule);
+        when(roleService.getMonoRole(AnonymousUserConst.Role))
+            .thenReturn(Mono.just(role));
+        webClient.get().uri("/apis/fake.halo.run/v1/posts").exchange().expectStatus()
+            .isOk()
+            .expectBody(String.class).isEqualTo("returned posts");
+    }
+
     @TestConfiguration
     static class TestConfig {