Spring Security + Keycloak: Accept Bearer Token - spring-security

Question

Somehow I'm lost with Spring Security and Keycloak.
In an application I successfully receive an access token from my Keycloak instance. I then use this token for a request against my Spring Security server (which uses the same Keycloak instance).
But all I get are 403 errors.
Here are code excerpts (written in kotlin):
Security Config:
#KeycloakConfiguration
abstract class MyConfig : KeycloakWebSecurityConfigurerAdapter() {
#Autowired
lateinit var keycloakClientRequestFactory: KeycloakClientRequestFactory
#Bean
#Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
fun keycloakRestTemplate(): KeycloakRestTemplate {
return KeycloakRestTemplate(keycloakClientRequestFactory)
}
#Autowired
#Throws(Exception::class)
fun configureGlobal(auth: AuthenticationManagerBuilder) {
val keycloakAuthenticationProvider = keycloakAuthenticationProvider()
keycloakAuthenticationProvider.setGrantedAuthoritiesMapper(SimpleAuthorityMapper())
auth.authenticationProvider(keycloakAuthenticationProvider)
}
#Bean
fun KeycloakConfigResolver(): KeycloakConfigResolver {
return KeycloakSpringBootConfigResolver()
}
#Throws(Exception::class)
override fun configure(http: HttpSecurity) {
http.csrf().disable()
.cors().and()
.authorizeRequests()
.anyRequest().authenticated()
http.requiresChannel().anyRequest().requiresSecure()
}
#Bean
override fun sessionAuthenticationStrategy(): SessionAuthenticationStrategy =
RegisterSessionAuthenticationStrategy(SessionRegistryImpl())
#Bean
fun keycloakAuthenticationProcessingFilterRegistrationBean(
filter: KeycloakAuthenticationProcessingFilter): FilterRegistrationBean {
val registrationBean = FilterRegistrationBean(filter)
registrationBean.isEnabled = false
return registrationBean
}
#Bean
fun keycloakPreAuthActionsFilterRegistrationBean(
filter: KeycloakPreAuthActionsFilter): FilterRegistrationBean {
val registrationBean = FilterRegistrationBean(filter)
registrationBean.isEnabled = false
return registrationBean
}
#Bean
fun corsConfigurationSource(): CorsConfigurationSource {
val configuration = CorsConfiguration()
configuration.allowedOrigins = arrayListOf("*").toMutableList()
configuration.allowedMethods = arrayListOf("HEAD", "GET", "POST", "PUT", "DELETE", "PATCH","OPTIONS")
configuration.allowCredentials = true
configuration.allowedHeaders = arrayListOf("Authorization", "Cache-Control", "Content-Type")
val source = UrlBasedCorsConfigurationSource()
source.registerCorsConfiguration("/**", configuration)
return source
}
}
In my controller:
#RequestMapping("/test")
#ResponseBody
fun test(): String {
return "success"
}
In my call to the server I can verify that the authorization header is set as follows: Authorization: Bearer [Token]
What am I missing? I'm glad for any help!
Edit:
Spring Security Debug Log:
2018-02-13 15:37:37.594 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.a.i.FilterSecurityInterceptor : Secure object: FilterInvocation: URL: /maintenance/secure-test; Attributes: [authenticated]
2018-02-13 15:37:37.594 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.a.i.FilterSecurityInterceptor : Previously Authenticated: org.springframework.security.authentication.AnonymousAuthenticationToken#9055286a: Principal: anonymousUser; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails#59b2: RemoteIpAddress: 192.168.1.4; SessionId: null; Granted Authorities: ROLE_ANONYMOUS
2018-02-13 15:37:37.595 DEBUG 13245 --- [io-10010-exec-3] o.s.s.w.a.ExceptionTranslationFilter : Chain processed normally
2018-02-13 15:37:37.595 DEBUG 13245 --- [io-10010-exec-3] s.s.w.c.SecurityContextPersistenceFilter : SecurityContextHolder now cleared, as request processing completed
2018-02-13 15:37:37.595 DEBUG 13245 --- [io-10010-exec-1] o.s.s.access.vote.AffirmativeBased : Voter: org.springframework.security.web.access.expression.WebExpressionVoter#6b79755c, returned: -1
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.a.ExceptionTranslationFilter : Access is denied (user is anonymous); redirecting to authentication entry point
org.springframework.security.access.AccessDeniedException: Access is denied
at org.springframework.security.access.vote.AffirmativeBased.decide(AffirmativeBased.java:84) ~[spring-security-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.security.access.intercept.AbstractSecurityInterceptor.beforeInvocation(AbstractSecurityInterceptor.java:233) ~[spring-security-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:124) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) [spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
[...skipping full stack trace...]
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.util.matcher.AndRequestMatcher : Trying to match using NegatedRequestMatcher [requestMatcher=Ant [pattern='/**/favicon.ico']]
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.u.matcher.AntPathRequestMatcher : Checking match of request : '/maintenance/secure-test'; against '/**/favicon.ico'
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.u.matcher.NegatedRequestMatcher : matches = true
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.util.matcher.AndRequestMatcher : Trying to match using NegatedRequestMatcher [requestMatcher=MediaTypeRequestMatcher [contentNegotiationStrategy=org.springframework.web.accept.ContentNegotiationManager#40c8c1fa, matchingMediaTypes=[application/json], useEquals=false, ignoredMediaTypes=[*/*]]]
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.u.m.MediaTypeRequestMatcher : httpRequestMediaTypes=[application/json, text/plain, */*]
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.u.m.MediaTypeRequestMatcher : Processing application/json
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.u.m.MediaTypeRequestMatcher : application/json .isCompatibleWith application/json = true
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.u.matcher.NegatedRequestMatcher : matches = false
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.util.matcher.AndRequestMatcher : Did not match
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.s.HttpSessionRequestCache : Request not saved as configured RequestMatcher did not match
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.a.ExceptionTranslationFilter : Calling Authentication entry point.
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] o.s.s.w.a.Http403ForbiddenEntryPoint : Pre-authenticated entry point called. Rejecting access
2018-02-13 15:37:37.596 DEBUG 13245 --- [io-10010-exec-1] w.c.HttpSessionSecurityContextRepository : SecurityContext is empty or contents are anonymous - context will not be stored in HttpSession.
2018-02-13 15:37:37.597 DEBUG 13245 --- [io-10010-exec-1] s.s.w.c.SecurityContextPersistenceFilter : SecurityContextHolder now cleared, as request processing completed
Keycloak debug (on Spring server):
2018-02-13 17:29:46.455 DEBUG 14194 --- [io-10010-exec-8] o.k.adapters.PreAuthActionsHandler : adminRequest [URI]/maintenance/secure-test
2018-02-13 17:29:46.455 DEBUG 14194 --- [io-10010-exec-8] .k.a.t.AbstractAuthenticatedActionsValve : AuthenticatedActionsValve.invoke /maintenance/secure-test
2018-02-13 17:29:46.455 DEBUG 14194 --- [io-10010-exec-8] o.k.a.AuthenticatedActionsHandler : AuthenticatedActionsValve.invoke [URI]/maintenance/secure-test
2018-02-13 17:29:46.455 DEBUG 14194 --- [io-10010-exec-8] o.k.a.AuthenticatedActionsHandler : Policy enforcement is disabled.
2018-02-13 17:29:46.461 DEBUG 14194 --- [io-10010-exec-9] o.k.adapters.PreAuthActionsHandler : adminRequest [URI]/maintenance/secure-test
2018-02-13 17:29:46.462 DEBUG 14194 --- [io-10010-exec-9] .k.a.t.AbstractAuthenticatedActionsValve : AuthenticatedActionsValve.invoke /maintenance/secure-test
2018-02-13 17:29:46.462 DEBUG 14194 --- [io-10010-exec-9] o.k.a.AuthenticatedActionsHandler : AuthenticatedActionsValve.invoke [URI]/maintenance/secure-test
2018-02-13 17:29:46.462 DEBUG 14194 --- [io-10010-exec-9] o.k.a.AuthenticatedActionsHandler : Policy enforcement is disabled.
2018-02-13 17:29:46.463 DEBUG 14194 --- [io-10010-exec-9] o.k.adapters.PreAuthActionsHandler : adminRequest [URI]/maintenance/secure-test
2018-02-13 17:29:46.463 DEBUG 14194 --- [io-10010-exec-9] f.KeycloakAuthenticationProcessingFilter : Request is to process authentication
2018-02-13 17:29:46.463 DEBUG 14194 --- [io-10010-exec-9] f.KeycloakAuthenticationProcessingFilter : Attempting Keycloak authentication
2018-02-13 17:29:46.467 DEBUG 14194 --- [io-10010-exec-9] o.k.a.BearerTokenRequestAuthenticator : Verifying access_token
2018-02-13 17:29:46.572 DEBUG 14194 --- [io-10010-exec-9] o.k.a.rotation.JWKPublicKeyLocator : Realm public keys successfully retrieved for client service-api. New kids: [omitted KID]
2018-02-13 17:29:46.573 DEBUG 14194 --- [io-10010-exec-9] o.k.a.BearerTokenRequestAuthenticator : successful authorized
2018-02-13 17:29:46.577 DEBUG 14194 --- [io-10010-exec-9] a.s.a.SpringSecurityRequestAuthenticator : Completing bearer authentication. Bearer roles: []
2018-02-13 17:29:46.578 DEBUG 14194 --- [io-10010-exec-9] o.k.adapters.RequestAuthenticator : User ’test' invoking ‚[URI]/maintenance/secure-test' on client 'service-api'
2018-02-13 17:29:46.578 DEBUG 14194 --- [io-10010-exec-9] o.k.adapters.RequestAuthenticator : Bearer AUTHENTICATED
2018-02-13 17:29:46.578 DEBUG 14194 --- [io-10010-exec-9] f.KeycloakAuthenticationProcessingFilter : Auth outcome: AUTHENTICATED
2018-02-13 17:29:46.586 DEBUG 14194 --- [io-10010-exec-9] o.k.a.s.management.HttpSessionManager : Session created: [omitted sessione ID]
2018-02-13 17:29:46.588 DEBUG 14194 --- [io-10010-exec-9] f.KeycloakAuthenticationProcessingFilter : Authentication success using bearer token/basic authentication. Updating SecurityContextHolder to contain: org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken#bb340ce7: Principal: test; Credentials: [PROTECTED]; Authenticated: true; Details: org.keycloak.adapters.springsecurity.account.SimpleKeycloakAccount#68bb9634; Not granted any authorities
2018-02-13 17:29:46.588 DEBUG 14194 --- [io-10010-exec-9] o.k.a.AuthenticatedActionsHandler : AuthenticatedActionsValve.invoke [URI]/maintenance/secure-test
2018-02-13 17:29:46.588 DEBUG 14194 --- [io-10010-exec-9] o.k.a.AuthenticatedActionsHandler : Policy enforcement is disabled.

Answer 1

For the sake of completion I answer this question:
Like stated in a comment on the question, the problem was the call to super.configure(http) in KeycloakWebSecurityConfigurerAdapter.
So, if you encounter a similar error check if you make this call. The config should look something like this:
#KeycloakConfiguration
class MyConfig : KeycloakWebSecurityConfigurerAdapter() {
// [...]
#Throws(Exception::class)
override fun configure(http: HttpSecurity) {
super.configure(http) // this call was missing
// [...]
}
}