I did something similar in my application using Keycloak 4.8.1.Final where I could access the AccessToken and expose it as a bean for injection into other classes:
@Bean
@Scope(scopeName = WebApplicationContext.SCOPE_REQUEST, proxyMode = ScopedProxyMode.TARGET_CLASS)
public AccessToken getAccessToken() {
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
KeycloakPrincipal<RefreshableKeycloakSecurityContext> keycloakPrincipal = (KeycloakPrincipal) request.getUserPrincipal();
if (keycloakPrincipal == null) {
throw new NotAuthenticatedException("KeycloakPrincipal not set");
}
KeycloakSecurityContext keycloakSecurityContext = keycloakPrincipal.getKeycloakSecurityContext();
return keycloakSecurityContext.getToken();
}
After upgrading Keycloak to 5 (and above all the way to 15.0.1) the code above no longer works. The only way I managed to get a reference to the AccessToken was by using Spring Security as described (mostly) here
Basically adding spring security deps to gradle
implementation('org.springframework.boot:spring-boot-starter-security')
Adding this config class...
import org.keycloak.adapters.KeycloakConfigResolver
import org.keycloak.adapters.springboot.KeycloakSpringBootConfigResolver
import org.keycloak.adapters.springsecurity.config.KeycloakWebSecurityConfigurerAdapter
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity
import org.springframework.security.config.annotation.web.builders.HttpSecurity
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity
import org.springframework.security.core.authority.mapping.SimpleAuthorityMapper
import org.springframework.security.core.session.SessionRegistryImpl
import org.springframework.security.web.authentication.session.RegisterSessionAuthenticationStrategy
import org.springframework.security.web.authentication.session.SessionAuthenticationStrategy
import javax.inject.Inject
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(jsr250Enabled = true)
class KeycloakConfig : KeycloakWebSecurityConfigurerAdapter() {
override fun configure(http: HttpSecurity) {
super.configure(http)
http.authorizeRequests()
.anyRequest()
.permitAll()
http.csrf().disable()
}
@Inject
fun configureGlobal(authManager: AuthenticationManagerBuilder) {
val authProvider = keycloakAuthenticationProvider()
authProvider.setGrantedAuthoritiesMapper(SimpleAuthorityMapper())
authManager.authenticationProvider(authProvider)
}
@Bean
override fun sessionAuthenticationStrategy(): SessionAuthenticationStrategy {
return RegisterSessionAuthenticationStrategy(SessionRegistryImpl())
}
}
And then updating my method in my other config class:
import org.springframework.amqp.rabbit.annotation.EnableRabbit
import org.springframework.cache.annotation.EnableCaching
import org.springframework.context.annotation.EnableAspectJAutoProxy
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder
import com.fasterxml.jackson.module.kotlin.KotlinModule
import com.fasterxml.jackson.databind.DeserializationFeature
import com.fasterxml.jackson.databind.ObjectMapper
import org.springframework.web.context.WebApplicationContext
import org.springframework.context.annotation.ScopedProxyMode
import org.keycloak.representations.AccessToken
import javax.servlet.http.HttpServletRequest
import org.springframework.web.context.request.RequestContextHolder
import org.springframework.web.context.request.ServletRequestAttributes
import org.keycloak.KeycloakPrincipal
import org.keycloak.adapters.RefreshableKeycloakSecurityContext
import org.keycloak.KeycloakSecurityContext
import org.keycloak.adapters.springboot.KeycloakSpringBootConfigResolver
import org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.context.annotation.Scope
import javax.inject.Inject
import javax.ws.rs.NotAuthorizedException
import javax.ws.rs.core.Context
import javax.ws.rs.core.SecurityContext
@Configuration
class ApplicationConfig {
//needed for keycloak adaptor 7.0.1+
// added in this here rather than in KeycloakConfig above due to issue here:
// https://stackoverflow.com/questions/57957006/unable-to-build-spring-based-project-for-authentication-using-keycloak
@Bean
fun keycloakConfigResolver(): KeycloakSpringBootConfigResolver {
return KeycloakSpringBootConfigResolver()
}
@Bean
@Scope(scopeName = WebApplicationContext.SCOPE_REQUEST, proxyMode = ScopedProxyMode.TARGET_CLASS)
fun accessToken(): AccessToken {
val request = (RequestContextHolder.currentRequestAttributes() as ServletRequestAttributes).request
val token = request.userPrincipal as KeycloakAuthenticationToken? ?: throw NotAuthorizedException("KeycloakPrincipal not set")
val principal = token.principal as KeycloakPrincipal<*>
val keycloakSecurityContext = principal.keycloakSecurityContext
return keycloakSecurityContext.token
}
}
The above codes works for me with Springboot versions 2.1.2.RELEASE and 2.5.3
