update spring's documentation
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sebastienblanc
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2 changed files with 62 additions and 35 deletions
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@ -2,14 +2,14 @@
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==== Spring Boot Adapter
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To be able to secure Spring Boot apps you must add the Keycloak Spring Boot adapter JAR to your app.
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You then have to provide some extra configuration via normal Spring Boot configuration (`application.properties`). Let's go over these steps.
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You then have to provide some extra configuration via normal Spring Boot configuration (`application.properties`). Let's go over these steps.
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[[_spring_boot_adapter_installation]]
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===== Adapter Installation
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The Keycloak Spring Boot adapter takes advantage of Spring Boot's autoconfiguration so all you need to do is add the Keycloak Spring Boot adapter JAR to your project.
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Depending on what container you are using with Spring Boot, you also need to add the appropriate Keycloak container adapter.
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If you are using Maven, add the following to your pom.xml (using Tomcat as an example):
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If you are using Maven, add the following to your pom.xml (using Tomcat as an example):
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[source,xml,subs="attributes+"]
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@ -26,15 +26,21 @@ If you are using Maven, add the following to your pom.xml (using Tomcat as an ex
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<artifactId>keycloak-tomcat8-adapter</artifactId>
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<version>{{book.project.versionMvn}}</version>
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</dependency>
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----
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----
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Currently the following embedded containers are supported :
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* Tomcat
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* Undertow
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* Jetty
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[[_spring_boot_adapter_configuration]]
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===== Required Spring Boot Adapter Configuration
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This section describes how to configure your Spring Boot app to use Keycloak.
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This section describes how to configure your Spring Boot app to use Keycloak.
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Instead of a `keycloak.json` file, you configure the realm for the Spring Boot Keycloak adapter via the normal Spring Boot configuration.
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For example:
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For example:
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[source]
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----
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@ -48,8 +54,11 @@ keycloak.credentials.secret = 11111111-1111-1111-1111-111111111111
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keycloak.use-resource-role-mappings = true
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----
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You also need to specify the J2EE security config that would normally go in the `web.xml`.
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Here's an example configuration:
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To configure a Policy Enforcer, unlike keycloak.json, `policy-enforcer-config` must be used instead of just `policy-enforcer`.
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You also need to specify the Java EE security config that would normally go in the `web.xml`.
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The Spring Boot Adapter will set the `login-method` to `KEYCLOAK` and configure the `security-constraints` at startup time.
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Here's an example configuration:
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[source]
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----
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@ -2,14 +2,14 @@
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==== Spring Security Adapter
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To secure an application with Spring Security and Keycloak, add this adapter as a dependency to your project.
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You then have to provide some extra beans in your Spring Security configuration file and add the Keycloak security filter to your pipeline.
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You then have to provide some extra beans in your Spring Security configuration file and add the Keycloak security filter to your pipeline.
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Unlike the other Keycloak Adapters, you should not configure your security in web.xml.
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However, keycloak.json is still required.
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However, keycloak.json is still required.
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===== Adapter Installation
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Add Keycloak Spring Security adapter as a dependency to your Maven POM or Gradle build.
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Add Keycloak Spring Security adapter as a dependency to your Maven POM or Gradle build.
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[source,xml,subs="attributes+"]
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@ -23,19 +23,19 @@ Add Keycloak Spring Security adapter as a dependency to your Maven POM or Gradle
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===== Spring Security Configuration
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The Keycloak Spring Security adapter takes advantage of Spring Security's flexible security configuration syntax.
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The Keycloak Spring Security adapter takes advantage of Spring Security's flexible security configuration syntax.
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====== Java Configuration
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Keycloak provides a KeycloakWebSecurityConfigurerAdapter as a convenient base class for creating a http://docs.spring.io/spring-security/site/docs/4.0.x/apidocs/org/springframework/security/config/annotation/web/WebSecurityConfigurer.html[WebSecurityConfigurer] instance.
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The implementation allows customization by overriding methods.
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While its use is not required, it greatly simplifies your security context configuration.
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While its use is not required, it greatly simplifies your security context configuration.
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[source]
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----
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@Configuration
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@EnableWebSecurity
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@ComponentScan(basePackageClasses = KeycloakSecurityComponents.class)
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@ -69,22 +69,22 @@ public class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter
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.anyRequest().permitAll();
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}
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}
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----
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----
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You must provide a session authentication strategy bean which should be of type `RegisterSessionAuthenticationStrategy` for public or confidential applications and `NullAuthenticatedSessionStrategy` for bearer-only applications.
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You must provide a session authentication strategy bean which should be of type `RegisterSessionAuthenticationStrategy` for public or confidential applications and `NullAuthenticatedSessionStrategy` for bearer-only applications.
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Spring Security's `SessionFixationProtectionStrategy` is currently not supported because it changes the session identifier after login via Keycloak.
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If the session identifier changes, universal log out will not work because Keycloak is unaware of the new session identifier.
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If the session identifier changes, universal log out will not work because Keycloak is unaware of the new session identifier.
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====== XML Configuration
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While Spring Security's XML namespace simplifies configuration, customizing the configuration can be a bit verbose.
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While Spring Security's XML namespace simplifies configuration, customizing the configuration can be a bit verbose.
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[source]
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----
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:context="http://www.springframework.org/schema/context"
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@ -144,7 +144,7 @@ While Spring Security's XML namespace simplifies configuration, customizing the
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</security:http>
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</beans>
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----
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----
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===== Multi Tenancy
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@ -155,23 +155,23 @@ More details on how to implement the `KeycloakConfigResolver` can be found in <<
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===== Naming Security Roles
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Spring Security, when using role-based authentication, requires that role names start with `ROLE_`.
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For example, an administrator role must be declared in Keycloak as `ROLE_ADMIN` or similar, not simply `ADMIN`.
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For example, an administrator role must be declared in Keycloak as `ROLE_ADMIN` or similar, not simply `ADMIN`.
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The class `org.keycloak.adapters.springsecurity.authentication.KeycloakAuthenticationProvider` supports an optional `org.springframework.security.core.authority.mapping.GrantedAuthoritiesMapper` which can be used to map roles coming from Keycloak to roles recognized by Spring Security.
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Use, for example, `org.springframework.security.core.authority.mapping.SimpleAuthorityMapper` to insert the `ROLE_` prefix and convert the role name to upper case.
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The class is part of Spring Security Core module.
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The class is part of Spring Security Core module.
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===== Client to Client Support
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To simplify communication between clients, Keycloak provides an extension of Spring's `RestTemplate` that handles bearer token authentication for you.
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To enable this feature your security configuration must add the `KeycloakRestTemplate` bean.
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Note that it must be scoped as a prototype to function correctly.
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Note that it must be scoped as a prototype to function correctly.
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For Java configuration:
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For Java configuration:
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[source]
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----
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@Configuration
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@EnableWebSecurity
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@ComponentScan(basePackageClasses = KeycloakSecurityComponents.class)
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@ -190,24 +190,24 @@ public class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter {
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...
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}
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----
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----
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For XML configuration:
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For XML configuration:
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[source]
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----
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<bean id="keycloakRestTemplate" class="org.keycloak.adapters.springsecurity.client.KeycloakRestTemplate" scope="prototype">
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<constructor-arg name="factory" ref="keycloakClientRequestFactory" />
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</bean>
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----
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----
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Your application code can then use `KeycloakRestTemplate` any time it needs to make a call to another client.
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For example:
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For example:
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[source]
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----
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@Service
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public class RemoteProductService implements ProductService {
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@ -223,18 +223,36 @@ public class RemoteProductService implements ProductService {
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return Arrays.asList(response.getBody());
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}
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}
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----
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----
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===== Spring Boot Configuration
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===== Spring Boot Integration
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The Spring Boot and the Spring Security adapters can be combined.
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====== Using Spring Boot Configuration
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By Default, the Spring Security Adapter looks for a `keycloak.json` configuration file. You can make sure it looks at the configuration provided by the Spring Boot Adapter by adding this bean :
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[source]
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----
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@Bean
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public KeycloakConfigResolver KeycloakConfigResolver() {
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return new KeycloakSpringBootConfigResolver();
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}
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----
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====== Avoid double Filter bean registration
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Spring Boot attempts to eagerly register filter beans with the web application context.
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Therefore, when running the Keycloak Spring Security adapter in a Spring Boot environment, it may be necessary to add two ``FilterRegistrationBean``s to your security configuration to prevent the Keycloak filters from being registered twice.
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Therefore, when running the Keycloak Spring Security adapter in a Spring Boot environment, it may be necessary to add two ``FilterRegistrationBean``s to your security configuration to prevent the Keycloak filters from being registered twice.
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[source]
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----
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@Configuration
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@EnableWebSecurity
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public class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter
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@ -259,4 +277,4 @@ public class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter
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...
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}
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----
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----
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