Configure Issuer Validator for Resource Server

See gh-17952

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerJwkConfiguration.java

@@ -22,6 +22,7 @@ import org.springframework.boot.autoconfigure.security.oauth2.resource.OAuth2Res
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.security.oauth2.jwt.JwtValidators;
 import org.springframework.security.oauth2.jwt.NimbusReactiveJwtDecoder;
 import org.springframework.security.oauth2.jwt.ReactiveJwtDecoder;
 import org.springframework.security.oauth2.jwt.ReactiveJwtDecoders;
@@ -45,7 +46,13 @@ class ReactiveOAuth2ResourceServerJwkConfiguration {
 	@ConditionalOnProperty(name = "spring.security.oauth2.resourceserver.jwt.jwk-set-uri")
 	@ConditionalOnMissingBean
 	public ReactiveJwtDecoder jwtDecoder() {
-		return new NimbusReactiveJwtDecoder(this.properties.getJwt().getJwkSetUri());
+		NimbusReactiveJwtDecoder nimbusReactiveJwtDecoder = new NimbusReactiveJwtDecoder(
+				this.properties.getJwt().getJwkSetUri());
+		if (this.properties.getJwt().getIssuerUri() != null) {
+			nimbusReactiveJwtDecoder
+					.setJwtValidator(JwtValidators.createDefaultWithIssuer(this.properties.getJwt().getIssuerUri()));
+		}
+		return nimbusReactiveJwtDecoder;
 	}
 
 	@Bean

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerJwtConfiguration.java

@@ -24,6 +24,7 @@ import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.security.oauth2.jwt.JwtDecoder;
 import org.springframework.security.oauth2.jwt.JwtDecoders;
+import org.springframework.security.oauth2.jwt.JwtValidators;
 import org.springframework.security.oauth2.jwt.NimbusJwtDecoderJwkSupport;
 
 /**
@@ -46,7 +47,13 @@ class OAuth2ResourceServerJwtConfiguration {
 	@ConditionalOnProperty(name = "spring.security.oauth2.resourceserver.jwt.jwk-set-uri")
 	@ConditionalOnMissingBean
 	public JwtDecoder jwtDecoderByJwkKeySetUri() {
-		return new NimbusJwtDecoderJwkSupport(this.properties.getJwt().getJwkSetUri());
+		NimbusJwtDecoderJwkSupport nimbusJwtDecoder = new NimbusJwtDecoderJwkSupport(
+				this.properties.getJwt().getJwkSetUri());
+		if (this.properties.getJwt().getIssuerUri() != null) {
+			nimbusJwtDecoder
+					.setJwtValidator(JwtValidators.createDefaultWithIssuer(this.properties.getJwt().getIssuerUri()));
+		}
+		return nimbusJwtDecoder;
 	}
 
 	@Bean

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java

@@ -16,6 +16,7 @@
 package org.springframework.boot.autoconfigure.security.oauth2.resource.reactive;
 
 import java.io.IOException;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
@@ -42,6 +43,10 @@ import org.springframework.security.config.BeanIds;
 import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
 import org.springframework.security.config.web.server.ServerHttpSecurity;
 import org.springframework.security.core.userdetails.MapReactiveUserDetailsService;
+import org.springframework.security.oauth2.core.DelegatingOAuth2TokenValidator;
+import org.springframework.security.oauth2.core.OAuth2TokenValidator;
+import org.springframework.security.oauth2.jwt.Jwt;
+import org.springframework.security.oauth2.jwt.JwtIssuerValidator;
 import org.springframework.security.oauth2.jwt.NimbusReactiveJwtDecoder;
 import org.springframework.security.oauth2.jwt.ReactiveJwtDecoder;
 import org.springframework.security.oauth2.server.resource.BearerTokenAuthenticationToken;
@@ -163,6 +168,30 @@ public class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 				});
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void autoConfigurationShouldConfigureResourceServerUsingJwkSetUriAndIssuerUri() throws Exception {
+		this.server = new MockWebServer();
+		this.server.start();
+		String path = "test";
+		String issuer = this.server.url(path).toString();
+		String cleanIssuerPath = cleanIssuerPath(issuer);
+		setupMockResponse(cleanIssuerPath);
+		this.contextRunner
+				.withPropertyValues("spring.security.oauth2.resourceserver.jwt.jwk-set-uri=https://jwk-set-uri.com",
+						"spring.security.oauth2.resourceserver.jwt.issuer-uri=http://" + this.server.getHostName() + ":"
+								+ this.server.getPort() + "/" + path)
+				.run((context) -> {
+					assertThat(context).hasSingleBean(ReactiveJwtDecoder.class);
+					ReactiveJwtDecoder reactiveJwtDecoder = context.getBean(ReactiveJwtDecoder.class);
+					DelegatingOAuth2TokenValidator<Jwt> jwtValidator = (DelegatingOAuth2TokenValidator) ReflectionTestUtils
+							.getField(reactiveJwtDecoder, "jwtValidator");
+					Collection<OAuth2TokenValidator<Jwt>> tokenValidators = (Collection<OAuth2TokenValidator<Jwt>>) ReflectionTestUtils
+							.getField(jwtValidator, "tokenValidators");
+					assertThat(tokenValidators.stream()).hasAtLeastOneElementOfType(JwtIssuerValidator.class);
+				});
+	}
+
 	private void assertFilterConfiguredWithJwtAuthenticationManager(AssertableReactiveWebApplicationContext context) {
 		MatcherSecurityWebFilterChain filterChain = (MatcherSecurityWebFilterChain) context
 				.getBean(BeanIds.SPRING_SECURITY_FILTER_CHAIN);

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerAutoConfigurationTests.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.boot.autoconfigure.security.oauth2.resource.servlet;
 
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -40,12 +41,17 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.security.config.BeanIds;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.oauth2.core.DelegatingOAuth2TokenValidator;
+import org.springframework.security.oauth2.core.OAuth2TokenValidator;
+import org.springframework.security.oauth2.jwt.Jwt;
 import org.springframework.security.oauth2.jwt.JwtDecoder;
+import org.springframework.security.oauth2.jwt.JwtIssuerValidator;
 import org.springframework.security.oauth2.jwt.NimbusJwtDecoderJwkSupport;
 import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
 import org.springframework.security.oauth2.server.resource.web.BearerTokenAuthenticationFilter;
 import org.springframework.security.web.FilterChainProxy;
 import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.mock;
@@ -148,6 +154,30 @@ public class OAuth2ResourceServerAutoConfigurationTests {
 				.run((context) -> assertThat(getBearerTokenFilter(context)).isNull());
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void autoConfigurationShouldConfigureResourceServerUsingJwkSetUriAndIssuerUri() throws Exception {
+		this.server = new MockWebServer();
+		this.server.start();
+		String path = "test";
+		String issuer = this.server.url(path).toString();
+		String cleanIssuerPath = cleanIssuerPath(issuer);
+		setupMockResponse(cleanIssuerPath);
+		this.contextRunner
+				.withPropertyValues("spring.security.oauth2.resourceserver.jwt.jwk-set-uri=https://jwk-set-uri.com",
+						"spring.security.oauth2.resourceserver.jwt.issuer-uri=http://" + this.server.getHostName() + ":"
+								+ this.server.getPort() + "/" + path)
+				.run((context) -> {
+					assertThat(context).hasSingleBean(JwtDecoder.class);
+					JwtDecoder jwtDecoder = context.getBean(JwtDecoder.class);
+					DelegatingOAuth2TokenValidator<Jwt> jwtValidator = (DelegatingOAuth2TokenValidator) ReflectionTestUtils
+							.getField(jwtDecoder, "jwtValidator");
+					Collection<OAuth2TokenValidator<Jwt>> tokenValidators = (Collection<OAuth2TokenValidator<Jwt>>) ReflectionTestUtils
+							.getField(jwtValidator, "tokenValidators");
+					assertThat(tokenValidators.stream()).hasAtLeastOneElementOfType(JwtIssuerValidator.class);
+				});
+	}
+
 	private Filter getBearerTokenFilter(AssertableWebApplicationContext context) {
 		FilterChainProxy filterChain = (FilterChainProxy) context.getBean(BeanIds.SPRING_SECURITY_FILTER_CHAIN);
 		List<SecurityFilterChain> filterChains = filterChain.getFilterChains();