Add DefaultResourcesFitler to XML configuration

config/src/main/java/org/springframework/security/config/http/AuthenticationConfigBuilder.java

@@ -60,6 +60,7 @@ import org.springframework.security.web.authentication.preauth.x509.SubjectDnX50
 import org.springframework.security.web.authentication.preauth.x509.X509AuthenticationFilter;
 import org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter;
 import org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter;
+import org.springframework.security.web.authentication.ui.DefaultResourcesFilter;
 import org.springframework.security.web.authentication.www.BasicAuthenticationEntryPoint;
 import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
 import org.springframework.security.web.csrf.CsrfToken;
@@ -155,6 +156,8 @@ final class AuthenticationConfigBuilder {
 
 	private BeanDefinition logoutPageGenerationFilter;
 
+	private BeanDefinition defaultResourcesFilter;
+
 	private BeanDefinition etf;
 
 	private final BeanReference requestCache;
@@ -635,6 +638,9 @@ final class AuthenticationConfigBuilder {
 			}
 			this.loginPageGenerationFilter = loginPageFilter.getBeanDefinition();
 			this.logoutPageGenerationFilter = logoutPageFilter.getBeanDefinition();
+			this.defaultResourcesFilter = BeanDefinitionBuilder.rootBeanDefinition(DefaultResourcesFilter.class)
+				.setFactoryMethod("css")
+				.getBeanDefinition();
 		}
 	}
 
@@ -890,6 +896,9 @@ final class AuthenticationConfigBuilder {
 			filters.add(new OrderDecorator(this.loginPageGenerationFilter, SecurityFilters.LOGIN_PAGE_FILTER));
 			filters.add(new OrderDecorator(this.logoutPageGenerationFilter, SecurityFilters.LOGOUT_PAGE_FILTER));
 		}
+		if (this.defaultResourcesFilter != null) {
+			filters.add(new OrderDecorator(this.defaultResourcesFilter, SecurityFilters.DEFAULT_RESOURCES_FILTER));
+		}
 		if (this.basicFilter != null) {
 			filters.add(new OrderDecorator(this.basicFilter, SecurityFilters.BASIC_AUTH_FILTER));
 		}

config/src/main/java/org/springframework/security/config/http/SecurityFilters.java

@@ -71,6 +71,8 @@ enum SecurityFilters {
 
 	FORM_LOGIN_FILTER,
 
+	DEFAULT_RESOURCES_FILTER,
+
 	LOGIN_PAGE_FILTER,
 
 	LOGOUT_PAGE_FILTER,

config/src/main/resources/org/springframework/security/config/spring-security-6.4.rnc

@@ -1346,4 +1346,4 @@ position =
 	## The explicit position at which the custom-filter should be placed in the chain. Use if you are replacing a standard filter.
 	attribute position {named-security-filter}
 
-named-security-filter = "FIRST" | "DISABLE_ENCODE_URL_FILTER" | "FORCE_EAGER_SESSION_FILTER" | "CHANNEL_FILTER" | "SECURITY_CONTEXT_FILTER" | "CONCURRENT_SESSION_FILTER" | "WEB_ASYNC_MANAGER_FILTER" | "HEADERS_FILTER" | "CORS_FILTER" | "SAML2_LOGOUT_REQUEST_FILTER" | "SAML2_LOGOUT_RESPONSE_FILTER" | "CSRF_FILTER" | "SAML2_LOGOUT_FILTER" | "LOGOUT_FILTER" | "OAUTH2_AUTHORIZATION_REQUEST_FILTER" | "SAML2_AUTHENTICATION_REQUEST_FILTER" | "X509_FILTER" | "PRE_AUTH_FILTER" | "CAS_FILTER" | "OAUTH2_LOGIN_FILTER" | "SAML2_AUTHENTICATION_FILTER" | "FORM_LOGIN_FILTER" | "LOGIN_PAGE_FILTER" |"LOGOUT_PAGE_FILTER" | "DIGEST_AUTH_FILTER" | "BEARER_TOKEN_AUTH_FILTER" | "BASIC_AUTH_FILTER" | "REQUEST_CACHE_FILTER" | "SERVLET_API_SUPPORT_FILTER" | "JAAS_API_SUPPORT_FILTER" | "REMEMBER_ME_FILTER" | "ANONYMOUS_FILTER" | "OAUTH2_AUTHORIZATION_CODE_GRANT_FILTER" | "WELL_KNOWN_CHANGE_PASSWORD_REDIRECT_FILTER" | "SESSION_MANAGEMENT_FILTER" | "EXCEPTION_TRANSLATION_FILTER" | "FILTER_SECURITY_INTERCEPTOR" | "SWITCH_USER_FILTER" | "LAST"
+named-security-filter = "FIRST" | "DISABLE_ENCODE_URL_FILTER" | "FORCE_EAGER_SESSION_FILTER" | "CHANNEL_FILTER" | "SECURITY_CONTEXT_FILTER" | "CONCURRENT_SESSION_FILTER" | "WEB_ASYNC_MANAGER_FILTER" | "HEADERS_FILTER" | "CORS_FILTER" | "SAML2_LOGOUT_REQUEST_FILTER" | "SAML2_LOGOUT_RESPONSE_FILTER" | "CSRF_FILTER" | "SAML2_LOGOUT_FILTER" | "LOGOUT_FILTER" | "OAUTH2_AUTHORIZATION_REQUEST_FILTER" | "SAML2_AUTHENTICATION_REQUEST_FILTER" | "X509_FILTER" | "PRE_AUTH_FILTER" | "CAS_FILTER" | "OAUTH2_LOGIN_FILTER" | "SAML2_AUTHENTICATION_FILTER" | "FORM_LOGIN_FILTER" | "DEFAULT_RESOURCES_FILTER" | "LOGIN_PAGE_FILTER" | "LOGOUT_PAGE_FILTER" | "DIGEST_AUTH_FILTER" | "BEARER_TOKEN_AUTH_FILTER" | "BASIC_AUTH_FILTER" | "REQUEST_CACHE_FILTER" | "SERVLET_API_SUPPORT_FILTER" | "JAAS_API_SUPPORT_FILTER" | "REMEMBER_ME_FILTER" | "ANONYMOUS_FILTER" | "OAUTH2_AUTHORIZATION_CODE_GRANT_FILTER" | "WELL_KNOWN_CHANGE_PASSWORD_REDIRECT_FILTER" | "SESSION_MANAGEMENT_FILTER" | "EXCEPTION_TRANSLATION_FILTER" | "FILTER_SECURITY_INTERCEPTOR" | "SWITCH_USER_FILTER" | "LAST"

config/src/main/resources/org/springframework/security/config/spring-security-6.4.xsd

@@ -3799,6 +3799,7 @@
          <xs:enumeration value="OAUTH2_LOGIN_FILTER"/>
          <xs:enumeration value="SAML2_AUTHENTICATION_FILTER"/>
          <xs:enumeration value="FORM_LOGIN_FILTER"/>
+         <xs:enumeration value="DEFAULT_RESOURCES_FILTER"/>
          <xs:enumeration value="LOGIN_PAGE_FILTER"/>
          <xs:enumeration value="LOGOUT_PAGE_FILTER"/>
          <xs:enumeration value="DIGEST_AUTH_FILTER"/>

config/src/test/java/org/springframework/security/config/http/MiscHttpConfigTests.java

@@ -93,6 +93,7 @@ import org.springframework.security.web.authentication.logout.LogoutFilter;
 import org.springframework.security.web.authentication.preauth.x509.X509AuthenticationFilter;
 import org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter;
 import org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter;
+import org.springframework.security.web.authentication.ui.DefaultResourcesFilter;
 import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
 import org.springframework.security.web.context.HttpRequestResponseHolder;
 import org.springframework.security.web.context.SecurityContextHolderFilter;
@@ -848,6 +849,7 @@ public class MiscHttpConfigTests {
 		assertThat(filters.next()).isInstanceOf(CsrfFilter.class);
 		assertThat(filters.next()).isInstanceOf(LogoutFilter.class);
 		assertThat(filters.next()).isInstanceOf(UsernamePasswordAuthenticationFilter.class);
+		assertThat(filters.next()).isInstanceOf(DefaultResourcesFilter.class);
 		assertThat(filters.next()).isInstanceOf(DefaultLoginPageGeneratingFilter.class);
 		assertThat(filters.next()).isInstanceOf(DefaultLogoutPageGeneratingFilter.class);
 		assertThat(filters.next()).isInstanceOf(BasicAuthenticationFilter.class);