Resource Server Opaque Token Sample

Issue: spring-projectsgh-5200

samples/boot/oauth2resourceserver-opaque/README.adoc

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+= OAuth 2.0 Resource Server Sample
+
+This sample demonstrates integrating Resource Server with a mock Authorization Server, though it can be modified to integrate
+with your favorite Authorization Server.
+
+With it, you can run the integration tests or run the application as a stand-alone service to explore how you can
+secure your own service with OAuth 2.0 Opaque Bearer Tokens using Spring Security.
+
+== 1. Running the tests
+
+To run the tests, do:
+
+```bash
+./gradlew integrationTest
+```
+
+Or import the project into your IDE and run `OAuth2ResourceServerApplicationTests` from there.
+
+=== What is it doing?
+
+By default, the tests are pointing at a mock Authorization Server instance.
+
+The tests are configured with a set of hard-coded tokens originally obtained from the mock Authorization Server,
+and each makes a query to the Resource Server with their corresponding token.
+
+The Resource Server subsquently verifies with the Authorization Server and authorizes the request, returning the phrase
+
+```bash
+Hello, subject!
+```
+
+where "subject" is the value of the `sub` field in the JWT returned by the Authorization Server.
+
+== 2. Running the app
+
+To run as a stand-alone application, do:
+
+```bash
+./gradlew bootRun
+```
+
+Or import the project into your IDE and run `OAuth2ResourceServerApplication` from there.
+
+Once it is up, you can use the following token:
+
+```bash
+export TOKEN=00ed5855-1869-47a0-b0c9-0f3ce520aee7
+```
+
+And then make this request:
+
+```bash
+curl -H "Authorization: Bearer $TOKEN" localhost:8080
+```
+
+Which will respond with the phrase:
+
+```bash
+Hello, subject!
+```
+
+where `subject` is the value of the `sub` field in the JWT returned by the Authorization Server.
+
+Or this:
+
+```bash
+export TOKEN=b43d1500-c405-4dc9-b9c9-6cfd966c34c9
+
+curl -H "Authorization: Bearer $TOKEN" localhost:8080/message
+```
+
+Will respond with:
+
+```bash
+secret message
+```
+
+== 2. Testing against other Authorization Servers
+
+_In order to use this sample, your Authorization Server must support Opaque Tokens and the Introspection Endpoint.
+
+To change the sample to point at your Authorization Server, simply find this property in the `application.yml`:
+
+```yaml
+spring:
+  security:
+    oauth2:
+      resourceserver:
+        opaque:
+          introspection-uri: ${mockwebserver.url}/introspect
+          introspection-client-id: client
+          introspection-client-secret: secret
+```
+
+And change the property to your Authorization Server's Introspection endpoint, including its client id and secret:
+
+```yaml
+spring:
+  security:
+    oauth2:
+      resourceserver:
+        opaque:
+          introspection-uri: ${mockwebserver.url}/introspect
+```
+
+And then you can run the app the same as before:
+
+```bash
+./gradlew bootRun
+```
+
+Make sure to obtain valid tokens from your Authorization Server in order to play with the sample Resource Server.
+To use the `/` endpoint, any valid token from your Authorization Server will do.
+To use the `/message` endpoint, the token should have the `message:read` scope.

samples/boot/oauth2resourceserver-opaque/spring-security-samples-boot-oauth2resourceserver-opaque.gradle

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+apply plugin: 'io.spring.convention.spring-sample-boot'
+
+dependencies {
+	compile project(':spring-security-config')
+	compile project(':spring-security-oauth2-jose')
+	compile project(':spring-security-oauth2-resource-server')
+
+	compile 'org.springframework.boot:spring-boot-starter-web'
+	compile 'com.nimbusds:oauth2-oidc-sdk'
+	compile 'com.squareup.okhttp3:mockwebserver'
+
+	testCompile project(':spring-security-test')
+	testCompile 'org.springframework.boot:spring-boot-starter-test'
+}

samples/boot/oauth2resourceserver-opaque/src/integration-test/java/sample/OAuth2ResourceServerApplicationITests.java

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+/*
+ * Copyright 2002-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package sample;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpHeaders;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.RequestPostProcessor;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+/**
+ * Integration tests for {@link OAuth2ResourceServerApplication}
+ *
+ * @author Josh Cummings
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+@ActiveProfiles("test")
+public class OAuth2ResourceServerApplicationITests {
+
+	String noScopesToken = "00ed5855-1869-47a0-b0c9-0f3ce520aee7";
+	String messageReadToken = "b43d1500-c405-4dc9-b9c9-6cfd966c34c9";
+
+	@Autowired
+	MockMvc mvc;
+
+	@Test
+	public void performWhenValidBearerTokenThenAllows()
+		throws Exception {
+
+		this.mvc.perform(get("/").with(bearerToken(this.noScopesToken)))
+				.andExpect(status().isOk())
+				.andExpect(content().string(containsString("Hello, subject!")));
+	}
+
+	// -- tests with scopes
+
+	@Test
+	public void performWhenValidBearerTokenThenScopedRequestsAlsoWork()
+			throws Exception {
+
+		this.mvc.perform(get("/message").with(bearerToken(this.messageReadToken)))
+				.andExpect(status().isOk())
+				.andExpect(content().string(containsString("secret message")));
+	}
+
+	@Test
+	public void performWhenInsufficientlyScopedBearerTokenThenDeniesScopedMethodAccess()
+			throws Exception {
+
+		this.mvc.perform(get("/message").with(bearerToken(this.noScopesToken)))
+				.andExpect(status().isForbidden())
+				.andExpect(header().string(HttpHeaders.WWW_AUTHENTICATE,
+						containsString("Bearer error=\"insufficient_scope\"")));
+	}
+
+	private static class BearerTokenRequestPostProcessor implements RequestPostProcessor {
+		private String token;
+
+		public BearerTokenRequestPostProcessor(String token) {
+			this.token = token;
+		}
+
+		@Override
+		public MockHttpServletRequest postProcessRequest(MockHttpServletRequest request) {
+			request.addHeader("Authorization", "Bearer " + this.token);
+			return request;
+		}
+	}
+
+	private static BearerTokenRequestPostProcessor bearerToken(String token) {
+		return new BearerTokenRequestPostProcessor(token);
+	}
+}

samples/boot/oauth2resourceserver-opaque/src/main/java/org/springframework/boot/env/MockWebServerEnvironmentPostProcessor.java

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+/*
+ * Copyright 2002-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.env;
+
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.boot.SpringApplication;
+import org.springframework.core.env.ConfigurableEnvironment;
+
+/**
+ * @author Rob Winch
+ */
+public class MockWebServerEnvironmentPostProcessor
+		implements EnvironmentPostProcessor, DisposableBean {
+
+	private final MockWebServerPropertySource propertySource = new MockWebServerPropertySource();
+
+	@Override
+	public void postProcessEnvironment(ConfigurableEnvironment environment,
+			SpringApplication application) {
+		environment.getPropertySources().addFirst(this.propertySource);
+	}
+
+	@Override
+	public void destroy() throws Exception {
+		this.propertySource.destroy();
+	}
+}