Add User Info to Getting Started in ref doc

Closes gh-917

Author: Steve Riesenberg

docs/src/docs/asciidoc/examples/src/main/java/sample/gettingStarted/SecurityConfig.java

@@ -32,12 +32,14 @@
 import org.springframework.core.annotation.Order;
 import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configurers.oauth2.server.resource.OAuth2ResourceServerConfigurer;
 import org.springframework.security.core.userdetails.User;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.oauth2.core.AuthorizationGrantType;
 import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
 import org.springframework.security.oauth2.core.oidc.OidcScopes;
+import org.springframework.security.oauth2.jwt.JwtDecoder;
 import org.springframework.security.oauth2.server.authorization.client.InMemoryRegisteredClientRepository;
 import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
 import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
@@ -66,7 +68,9 @@ public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity h
 			.exceptionHandling((exceptions) -> exceptions
 				.authenticationEntryPoint(
 					new LoginUrlAuthenticationEntryPoint("/login"))
-			);
+			)
+			// Accept access tokens for User Info and/or Client Registration
+			.oauth2ResourceServer(OAuth2ResourceServerConfigurer::jwt);
 		// @formatter:on
 
 		return http.build();
@@ -115,6 +119,7 @@ public RegisteredClientRepository registeredClientRepository() {
 				.redirectUri("http://127.0.0.1:8080/login/oauth2/code/messaging-client-oidc")
 				.redirectUri("http://127.0.0.1:8080/authorized")
 				.scope(OidcScopes.OPENID)
+				.scope(OidcScopes.PROFILE)
 				.scope("message.read")
 				.scope("message.write")
 				.clientSettings(ClientSettings.builder().requireAuthorizationConsent(true).build())
@@ -153,6 +158,11 @@ private static KeyPair generateRsaKey() { // <6>
 	}
 
 	@Bean // <7>
+	public JwtDecoder jwtDecoder(JWKSource<SecurityContext> jwkSource) {
+		return OAuth2AuthorizationServerConfiguration.jwtDecoder(jwkSource);
+	}
+
+	@Bean // <8>
 	public AuthorizationServerSettings authorizationServerSettings() {
 		return AuthorizationServerSettings.builder().build();
 	}

docs/src/docs/asciidoc/getting-started.adoc

@@ -55,4 +55,5 @@ This is a minimal configuration for getting started quickly. To understand what
 <4> An instance of xref:core-model-components.adoc#registered-client-repository[`RegisteredClientRepository`] for managing clients.
 <5> An instance of `com.nimbusds.jose.jwk.source.JWKSource` for signing access tokens.
 <6> An instance of `java.security.KeyPair` with keys generated on startup used to create the `JWKSource` above.
-<7> An instance of xref:configuration-model#configuring-authorization-server-settings[`AuthorizationServerSettings`] to configure Spring Authorization Server.
+<7> An instance of {spring-security-api-base-url}/org/springframework/security/oauth2/jwt/JwtDecoder.html[`JwtDecoder`] for decoding signed access tokens.
+<8> An instance of xref:configuration-model#configuring-authorization-server-settings[`AuthorizationServerSettings`] to configure Spring Authorization Server.