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OAuth 2.0 Resource Server Opaque Token
Minimal Dependencies for Introspection
As described in Minimal Dependencies for JWT most of Resource Server support is collected in spring-security-oauth2-resource-server
.
However unless a custom OpaqueTokenIntrospector
is provided, the Resource Server will fallback to NimbusOpaqueTokenIntrospector.
Meaning that both spring-security-oauth2-resource-server
and oauth2-oidc-sdk
are necessary in order to have a working minimal Resource Server that supports opaque Bearer Tokens.
Please refer to spring-security-oauth2-resource-server
in order to determine the correct version for oauth2-oidc-sdk
.
Minimal Configuration for Introspection
Typically, an opaque token can be verified via an OAuth 2.0 Introspection Endpoint, hosted by the authorization server. This can be handy when revocation is a requirement.
When using Spring Boot, configuring an application as a resource server that uses introspection consists of two basic steps. First, include the needed dependencies and second, indicate the introspection endpoint details.
Specifying the Authorization Server
To specify where the introspection endpoint is, simply do:
spring:
security:
oauth2:
resourceserver:
opaque-token:
introspection-uri: https://idp.example.com/introspect
client-id: client
client-secret: secret
Where idp.example.com/introspect
is the introspection endpoint hosted by your authorization server and client-id
and client-secret
are the credentials needed to hit that endpoint.
Resource Server will use these properties to further self-configure and subsequently validate incoming JWTs.
When using introspection, the authorization server’s word is the law. If the authorization server responses that the token is valid, then it is. |
And that’s it!
Startup Expectations
When this property and these dependencies are used, Resource Server will automatically configure itself to validate Opaque Bearer Tokens.
This startup process is quite a bit simpler than for JWTs since no endpoints need to be discovered and no additional validation rules get added.
Runtime Expectations
Once the application is started up, Resource Server will attempt to process any request containing an Authorization: Bearer
header:
GET / HTTP/1.1
Authorization: Bearer some-token-value # Resource Server will process this
So long as this scheme is indicated, Resource Server will attempt to process the request according to the Bearer Token specification.
Given an Opaque Token, Resource Server will
-
Query the provided introspection endpoint using the provided credentials and the token
-
Inspect the response for an
{ 'active' : true }
attribute -
Map each scope to an authority with the prefix
SCOPE_
The resulting Authentication#getPrincipal
, by default, is a Spring Security OAuth2AuthenticatedPrincipal
object, and Authentication#getName
maps to the token’s sub
property, if one is present.
From here, you may want to jump to:
How Opaque Token Authentication Works
Next, let’s see the architectural components that Spring Security uses to support opaque token Authentication in servlet-based applications, like the one we just saw.
OpaqueTokenAuthenticationProvider
is an AuthenticationProvider
implementation that leverages a OpaqueTokenIntrospector
to authenticate an opaque token.
Let’s take a look at how OpaqueTokenAuthenticationProvider
works within Spring Security.
The figure explains details of how the AuthenticationManager
in figures from Reading the Bearer Token works.
OpaqueTokenAuthenticationProvider
Usage The authentication Filter
from Reading the Bearer Token passes a BearerTokenAuthenticationToken
to the AuthenticationManager
which is implemented by ProviderManager
.
The ProviderManager
is configured to use an AuthenticationProvider of type OpaqueTokenAuthenticationProvider
.
OpaqueTokenAuthenticationProvider
introspects the opaque token and adds granted authorities using an OpaqueTokenIntrospector
.
When authentication is successful, the Authentication
that is returned is of type BearerTokenAuthentication
and has a principal that is the OAuth2AuthenticatedPrincipal
returned by the configured OpaqueTokenIntrospector
.
Ultimately, the returned BearerTokenAuthentication
will be set on the SecurityContextHolder
by the authentication Filter
.
Looking Up Attributes Post-Authentication
Once a token is authenticated, an instance of BearerTokenAuthentication
is set in the SecurityContext
.
This means that it’s available in @Controller
methods when using @EnableWebMvc
in your configuration:
-
Java
-
Kotlin
@GetMapping("/foo")
public String foo(BearerTokenAuthentication authentication) {
return authentication.getTokenAttributes().get("sub") + " is the subject";
}
@GetMapping("/foo")
fun foo(authentication: BearerTokenAuthentication): String {
return authentication.tokenAttributes["sub"].toString() + " is the subject"
}
Since BearerTokenAuthentication
holds an OAuth2AuthenticatedPrincipal
, that also means that it’s available to controller methods, too:
-
Java
-
Kotlin
@GetMapping("/foo")
public String foo(@AuthenticationPrincipal OAuth2AuthenticatedPrincipal principal) {
return principal.getAttribute("sub") + " is the subject";
}
@GetMapping("/foo")
fun foo(@AuthenticationPrincipal principal: OAuth2AuthenticatedPrincipal): String {
return principal.getAttribute<Any>("sub").toString() + " is the subject"
}
Looking Up Attributes Via SpEL
Of course, this also means that attributes can be accessed via SpEL.
For example, if using @EnableGlobalMethodSecurity
so that you can use @PreAuthorize
annotations, you can do:
-
Java
-
Kotlin
@PreAuthorize("principal?.attributes['sub'] == 'foo'")
public String forFoosEyesOnly() {
return "foo";
}
@PreAuthorize("principal?.attributes['sub'] == 'foo'")
fun forFoosEyesOnly(): String {
return "foo"
}
Overriding or Replacing Boot Auto Configuration
There are two @Bean
s that Spring Boot generates on Resource Server’s behalf.
The first is a SecurityFilterChain
that configures the app as a resource server.
When use Opaque Token, this SecurityFilterChain
looks like:
-
Java
-
Kotlin
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.authorizeHttpRequests(authorize -> authorize
.anyRequest().authenticated()
)
.oauth2ResourceServer(OAuth2ResourceServerConfigurer::opaqueToken);
return http.build();
}
@Bean
open fun filterChain(http: HttpSecurity): SecurityFilterChain {
http {
authorizeRequests {
authorize(anyRequest, authenticated)
}
oauth2ResourceServer {
opaqueToken { }
}
}
return http.build()
}
If the application doesn’t expose a SecurityFilterChain
bean, then Spring Boot will expose the above default one.
Replacing this is as simple as exposing the bean within the application:
-
Java
-
Kotlin
@EnableWebSecurity
public class MyCustomSecurityConfiguration {
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.authorizeHttpRequests(authorize -> authorize
.requestMatchers("/messages/**").hasAuthority("SCOPE_message:read")
.anyRequest().authenticated()
)
.oauth2ResourceServer(oauth2 -> oauth2
.opaqueToken(opaqueToken -> opaqueToken
.introspector(myIntrospector())
)
);
return http.build();
}
}
@EnableWebSecurity
class MyCustomSecurityConfiguration {
@Bean
open fun filterChain(http: HttpSecurity): SecurityFilterChain {
http {
authorizeRequests {
authorize("/messages/**", hasAuthority("SCOPE_message:read"))
authorize(anyRequest, authenticated)
}
oauth2ResourceServer {
opaqueToken {
introspector = myIntrospector()
}
}
}
return http.build()
}
}
The above requires the scope of message:read
for any URL that starts with /messages/
.
Methods on the oauth2ResourceServer
DSL will also override or replace auto configuration.
For example, the second @Bean
Spring Boot creates is an OpaqueTokenIntrospector
, which decodes String
tokens into validated instances of OAuth2AuthenticatedPrincipal
:
-
Java
-
Kotlin
@Bean
public OpaqueTokenIntrospector introspector() {
return new NimbusOpaqueTokenIntrospector(introspectionUri, clientId, clientSecret);
}
@Bean
fun introspector(): OpaqueTokenIntrospector {
return NimbusOpaqueTokenIntrospector(introspectionUri, clientId, clientSecret)
}
If the application doesn’t expose an OpaqueTokenIntrospector
bean, then Spring Boot will expose the above default one.
And its configuration can be overridden using introspectionUri()
and introspectionClientCredentials()
or replaced using introspector()
.
If the application doesn’t expose an OpaqueTokenAuthenticationConverter
bean, then spring-security will build BearerTokenAuthentication
.
Or, if you’re not using Spring Boot at all, then all of these components - the filter chain, an OpaqueTokenIntrospector
and an OpaqueTokenAuthenticationConverter
can be specified in XML.
The filter chain is specified like so:
-
Xml
<http>
<intercept-uri pattern="/**" access="authenticated"/>
<oauth2-resource-server>
<opaque-token introspector-ref="opaqueTokenIntrospector"
authentication-converter-ref="opaqueTokenAuthenticationConverter"/>
</oauth2-resource-server>
</http>
And the OpaqueTokenIntrospector
like so:
-
Xml
<bean id="opaqueTokenIntrospector"
class="org.springframework.security.oauth2.server.resource.introspection.NimbusOpaqueTokenIntrospector">
<constructor-arg value="${spring.security.oauth2.resourceserver.opaquetoken.introspection_uri}"/>
<constructor-arg value="${spring.security.oauth2.resourceserver.opaquetoken.client_id}"/>
<constructor-arg value="${spring.security.oauth2.resourceserver.opaquetoken.client_secret}"/>
</bean>
And the OpaqueTokenAuthenticationConverter
like so:
-
Xml
<bean id="opaqueTokenAuthenticationConverter"
class="com.example.CustomOpaqueTokenAuthenticationConverter"/>
Using introspectionUri()
An authorization server’s Introspection Uri can be configured as a configuration property or it can be supplied in the DSL:
-
Java
-
Kotlin
-
Xml
@EnableWebSecurity
public class DirectlyConfiguredIntrospectionUri {
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.authorizeHttpRequests(authorize -> authorize
.anyRequest().authenticated()
)
.oauth2ResourceServer(oauth2 -> oauth2
.opaqueToken(opaqueToken -> opaqueToken
.introspectionUri("https://idp.example.com/introspect")
.introspectionClientCredentials("client", "secret")
)
);
return http.build();
}
}
@EnableWebSecurity
class DirectlyConfiguredIntrospectionUri {
@Bean
open fun filterChain(http: HttpSecurity): SecurityFilterChain {
http {
authorizeRequests {
authorize(anyRequest, authenticated)
}
oauth2ResourceServer {
opaqueToken {
introspectionUri = "https://idp.example.com/introspect"
introspectionClientCredentials("client", "secret")
}
}
}
return http.build()
}
}
<bean id="opaqueTokenIntrospector"
class="org.springframework.security.oauth2.server.resource.introspection.NimbusOpaqueTokenIntrospector">
<constructor-arg value="https://idp.example.com/introspect"/>
<constructor-arg value="client"/>
<constructor-arg value="secret"/>
</bean>
Using introspectionUri()
takes precedence over any configuration property.
Using introspector()
More powerful than introspectionUri()
is introspector()
, which will completely replace any Boot auto configuration of OpaqueTokenIntrospector
:
-
Java
-
Kotlin
-
Xml
@EnableWebSecurity
public class DirectlyConfiguredIntrospector {
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.authorizeHttpRequests(authorize -> authorize
.anyRequest().authenticated()
)
.oauth2ResourceServer(oauth2 -> oauth2
.opaqueToken(opaqueToken -> opaqueToken
.introspector(myCustomIntrospector())
)
);
return http.build();
}
}
@EnableWebSecurity
class DirectlyConfiguredIntrospector {
@Bean
open fun filterChain(http: HttpSecurity): SecurityFilterChain {
http {
authorizeRequests {
authorize(anyRequest, authenticated)
}
oauth2ResourceServer {
opaqueToken {
introspector = myCustomIntrospector()
}
}
}
return http.build()
}
}
<http>
<intercept-uri pattern="/**" access="authenticated"/>
<oauth2-resource-server>
<opaque-token introspector-ref="myCustomIntrospector"/>
</oauth2-resource-server>
</http>
This is handy when deeper configuration, like authority mapping, JWT revocation, or request timeouts, is necessary.
Exposing a OpaqueTokenIntrospector
@Bean
Or, exposing a OpaqueTokenIntrospector
@Bean
has the same effect as introspector()
:
@Bean
public OpaqueTokenIntrospector introspector() {
return new NimbusOpaqueTokenIntrospector(introspectionUri, clientId, clientSecret);
}
Configuring Authorization
An OAuth 2.0 Introspection endpoint will typically return a scope
attribute, indicating the scopes (or authorities) it’s been granted, for example:
{ …, "scope" : "messages contacts"}
When this is the case, Resource Server will attempt to coerce these scopes into a list of granted authorities, prefixing each scope with the string "SCOPE_".
This means that to protect an endpoint or method with a scope derived from an Opaque Token, the corresponding expressions should include this prefix:
-
Java
-
Kotlin
-
Xml
@EnableWebSecurity
public class MappedAuthorities {
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.authorizeHttpRequests(authorizeRequests -> authorizeRequests
.requestMatchers("/contacts/**").hasAuthority("SCOPE_contacts")
.requestMatchers("/messages/**").hasAuthority("SCOPE_messages")
.anyRequest().authenticated()
)
.oauth2ResourceServer(OAuth2ResourceServerConfigurer::opaqueToken);
return http.build();
}
}
@EnableWebSecurity
class MappedAuthorities {
@Bean
open fun filterChain(http: HttpSecurity): SecurityFilterChain {
http {
authorizeRequests {
authorize("/contacts/**", hasAuthority("SCOPE_contacts"))
authorize("/messages/**", hasAuthority("SCOPE_messages"))
authorize(anyRequest, authenticated)
}
oauth2ResourceServer {
opaqueToken { }
}
}
return http.build()
}
}
<http>
<intercept-uri pattern="/contacts/**" access="hasAuthority('SCOPE_contacts')"/>
<intercept-uri pattern="/messages/**" access="hasAuthority('SCOPE_messages')"/>
<oauth2-resource-server>
<opaque-token introspector-ref="opaqueTokenIntrospector"/>
</oauth2-resource-server>
</http>
Or similarly with method security:
-
Java
-
Kotlin
@PreAuthorize("hasAuthority('SCOPE_messages')")
public List<Message> getMessages(...) {}
@PreAuthorize("hasAuthority('SCOPE_messages')")
fun getMessages(): List<Message?> {}
Extracting Authorities Manually
By default, Opaque Token support will extract the scope claim from an introspection response and parse it into individual GrantedAuthority
instances.
For example, if the introspection response were:
{
"active" : true,
"scope" : "message:read message:write"
}
Then Resource Server would generate an Authentication
with two authorities, one for message:read
and the other for message:write
.
This can, of course, be customized using a custom OpaqueTokenIntrospector
that takes a look at the attribute set and converts in its own way:
-
Java
-
Kotlin
public class CustomAuthoritiesOpaqueTokenIntrospector implements OpaqueTokenIntrospector {
private OpaqueTokenIntrospector delegate =
new NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret");
public OAuth2AuthenticatedPrincipal introspect(String token) {
OAuth2AuthenticatedPrincipal principal = this.delegate.introspect(token);
return new DefaultOAuth2AuthenticatedPrincipal(
principal.getName(), principal.getAttributes(), extractAuthorities(principal));
}
private Collection<GrantedAuthority> extractAuthorities(OAuth2AuthenticatedPrincipal principal) {
List<String> scopes = principal.getAttribute(OAuth2IntrospectionClaimNames.SCOPE);
return scopes.stream()
.map(SimpleGrantedAuthority::new)
.collect(Collectors.toList());
}
}
class CustomAuthoritiesOpaqueTokenIntrospector : OpaqueTokenIntrospector {
private val delegate: OpaqueTokenIntrospector = NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret")
override fun introspect(token: String): OAuth2AuthenticatedPrincipal {
val principal: OAuth2AuthenticatedPrincipal = delegate.introspect(token)
return DefaultOAuth2AuthenticatedPrincipal(
principal.name, principal.attributes, extractAuthorities(principal))
}
private fun extractAuthorities(principal: OAuth2AuthenticatedPrincipal): Collection<GrantedAuthority> {
val scopes: List<String> = principal.getAttribute(OAuth2IntrospectionClaimNames.SCOPE)
return scopes
.map { SimpleGrantedAuthority(it) }
}
}
Thereafter, this custom introspector can be configured simply by exposing it as a @Bean
:
-
Java
-
Kotlin
@Bean
public OpaqueTokenIntrospector introspector() {
return new CustomAuthoritiesOpaqueTokenIntrospector();
}
@Bean
fun introspector(): OpaqueTokenIntrospector {
return CustomAuthoritiesOpaqueTokenIntrospector()
}
Configuring Timeouts
By default, Resource Server uses connection and socket timeouts of 30 seconds each for coordinating with the authorization server.
This may be too short in some scenarios. Further, it doesn’t take into account more sophisticated patterns like back-off and discovery.
To adjust the way in which Resource Server connects to the authorization server, NimbusOpaqueTokenIntrospector
accepts an instance of RestOperations
:
-
Java
-
Kotlin
@Bean
public OpaqueTokenIntrospector introspector(RestTemplateBuilder builder, OAuth2ResourceServerProperties properties) {
RestOperations rest = builder
.basicAuthentication(properties.getOpaquetoken().getClientId(), properties.getOpaquetoken().getClientSecret())
.setConnectTimeout(Duration.ofSeconds(60))
.setReadTimeout(Duration.ofSeconds(60))
.build();
return new NimbusOpaqueTokenIntrospector(introspectionUri, rest);
}
@Bean
fun introspector(builder: RestTemplateBuilder, properties: OAuth2ResourceServerProperties): OpaqueTokenIntrospector? {
val rest: RestOperations = builder
.basicAuthentication(properties.opaquetoken.clientId, properties.opaquetoken.clientSecret)
.setConnectTimeout(Duration.ofSeconds(60))
.setReadTimeout(Duration.ofSeconds(60))
.build()
return NimbusOpaqueTokenIntrospector(introspectionUri, rest)
}
Using Introspection with JWTs
A common question is whether or not introspection is compatible with JWTs. Spring Security’s Opaque Token support has been designed to not care about the format of the token — it will gladly pass any token to the introspection endpoint provided.
So, let’s say that you’ve got a requirement that requires you to check with the authorization server on each request, in case the JWT has been revoked.
Even though you are using the JWT format for the token, your validation method is introspection, meaning you’d want to do:
spring:
security:
oauth2:
resourceserver:
opaque-token:
introspection-uri: https://idp.example.org/introspection
client-id: client
client-secret: secret
In this case, the resulting Authentication
would be BearerTokenAuthentication
.
Any attributes in the corresponding OAuth2AuthenticatedPrincipal
would be whatever was returned by the introspection endpoint.
But, let’s say that, oddly enough, the introspection endpoint only returns whether or not the token is active. Now what?
In this case, you can create a custom OpaqueTokenIntrospector
that still hits the endpoint, but then updates the returned principal to have the JWTs claims as the attributes:
-
Java
-
Kotlin
public class JwtOpaqueTokenIntrospector implements OpaqueTokenIntrospector {
private OpaqueTokenIntrospector delegate =
new NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret");
private JwtDecoder jwtDecoder = new NimbusJwtDecoder(new ParseOnlyJWTProcessor());
public OAuth2AuthenticatedPrincipal introspect(String token) {
OAuth2AuthenticatedPrincipal principal = this.delegate.introspect(token);
try {
Jwt jwt = this.jwtDecoder.decode(token);
return new DefaultOAuth2AuthenticatedPrincipal(jwt.getClaims(), NO_AUTHORITIES);
} catch (JwtException ex) {
throw new OAuth2IntrospectionException(ex);
}
}
private static class ParseOnlyJWTProcessor extends DefaultJWTProcessor<SecurityContext> {
JWTClaimsSet process(SignedJWT jwt, SecurityContext context)
throws JOSEException {
return jwt.getJWTClaimsSet();
}
}
}
class JwtOpaqueTokenIntrospector : OpaqueTokenIntrospector {
private val delegate: OpaqueTokenIntrospector = NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret")
private val jwtDecoder: JwtDecoder = NimbusJwtDecoder(ParseOnlyJWTProcessor())
override fun introspect(token: String): OAuth2AuthenticatedPrincipal {
val principal = delegate.introspect(token)
return try {
val jwt: Jwt = jwtDecoder.decode(token)
DefaultOAuth2AuthenticatedPrincipal(jwt.claims, NO_AUTHORITIES)
} catch (ex: JwtException) {
throw OAuth2IntrospectionException(ex.message)
}
}
private class ParseOnlyJWTProcessor : DefaultJWTProcessor<SecurityContext>() {
override fun process(jwt: SignedJWT, context: SecurityContext): JWTClaimsSet {
return jwt.jwtClaimsSet
}
}
}
Thereafter, this custom introspector can be configured simply by exposing it as a @Bean
:
-
Java
-
Kotlin
@Bean
public OpaqueTokenIntrospector introspector() {
return new JwtOpaqueTokenIntrospector();
}
@Bean
fun introspector(): OpaqueTokenIntrospector {
return JwtOpaqueTokenIntrospector()
}
Calling a /userinfo
Endpoint
Generally speaking, a Resource Server doesn’t care about the underlying user, but instead about the authorities that have been granted.
That said, at times it can be valuable to tie the authorization statement back to a user.
If an application is also using spring-security-oauth2-client
, having set up the appropriate ClientRegistrationRepository
, then this is quite simple with a custom OpaqueTokenIntrospector
.
This implementation below does three things:
-
Delegates to the introspection endpoint, to affirm the token’s validity
-
Looks up the appropriate client registration associated with the
/userinfo
endpoint -
Invokes and returns the response from the
/userinfo
endpoint
-
Java
-
Kotlin
public class UserInfoOpaqueTokenIntrospector implements OpaqueTokenIntrospector {
private final OpaqueTokenIntrospector delegate =
new NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret");
private final OAuth2UserService oauth2UserService = new DefaultOAuth2UserService();
private final ClientRegistrationRepository repository;
// ... constructor
@Override
public OAuth2AuthenticatedPrincipal introspect(String token) {
OAuth2AuthenticatedPrincipal authorized = this.delegate.introspect(token);
Instant issuedAt = authorized.getAttribute(ISSUED_AT);
Instant expiresAt = authorized.getAttribute(EXPIRES_AT);
ClientRegistration clientRegistration = this.repository.findByRegistrationId("registration-id");
OAuth2AccessToken token = new OAuth2AccessToken(BEARER, token, issuedAt, expiresAt);
OAuth2UserRequest oauth2UserRequest = new OAuth2UserRequest(clientRegistration, token);
return this.oauth2UserService.loadUser(oauth2UserRequest);
}
}
class UserInfoOpaqueTokenIntrospector : OpaqueTokenIntrospector {
private val delegate: OpaqueTokenIntrospector = NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret")
private val oauth2UserService = DefaultOAuth2UserService()
private val repository: ClientRegistrationRepository? = null
// ... constructor
override fun introspect(token: String): OAuth2AuthenticatedPrincipal {
val authorized = delegate.introspect(token)
val issuedAt: Instant? = authorized.getAttribute(ISSUED_AT)
val expiresAt: Instant? = authorized.getAttribute(EXPIRES_AT)
val clientRegistration: ClientRegistration = repository!!.findByRegistrationId("registration-id")
val accessToken = OAuth2AccessToken(BEARER, token, issuedAt, expiresAt)
val oauth2UserRequest = OAuth2UserRequest(clientRegistration, accessToken)
return oauth2UserService.loadUser(oauth2UserRequest)
}
}
If you aren’t using spring-security-oauth2-client
, it’s still quite simple.
You will simply need to invoke the /userinfo
with your own instance of WebClient
:
-
Java
-
Kotlin
public class UserInfoOpaqueTokenIntrospector implements OpaqueTokenIntrospector {
private final OpaqueTokenIntrospector delegate =
new NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret");
private final WebClient rest = WebClient.create();
@Override
public OAuth2AuthenticatedPrincipal introspect(String token) {
OAuth2AuthenticatedPrincipal authorized = this.delegate.introspect(token);
return makeUserInfoRequest(authorized);
}
}
class UserInfoOpaqueTokenIntrospector : OpaqueTokenIntrospector {
private val delegate: OpaqueTokenIntrospector = NimbusOpaqueTokenIntrospector("https://idp.example.org/introspect", "client", "secret")
private val rest: WebClient = WebClient.create()
override fun introspect(token: String): OAuth2AuthenticatedPrincipal {
val authorized = delegate.introspect(token)
return makeUserInfoRequest(authorized)
}
}
Either way, having created your OpaqueTokenIntrospector
, you should publish it as a @Bean
to override the defaults:
-
Java
-
Kotlin
@Bean
OpaqueTokenIntrospector introspector() {
return new UserInfoOpaqueTokenIntrospector(...);
}
@Bean
fun introspector(): OpaqueTokenIntrospector {
return UserInfoOpaqueTokenIntrospector(...)
}