Merge branch '5.3.x' into 5.4.x

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/AbstractWebClientReactiveOAuth2AccessTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -166,7 +166,7 @@ public abstract class AbstractWebClientReactiveOAuth2AccessTokenResponseClient<T
 	 * no scopes.
 	 */
 	Set<String> defaultScopes(T grantRequest) {
-		return scopes(grantRequest);
+		return Collections.emptySet();
 	}
 
 	/**

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/DefaultAuthorizationCodeTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -30,7 +30,6 @@ import org.springframework.security.oauth2.core.OAuth2Error;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
 import org.springframework.security.oauth2.core.http.converter.OAuth2AccessTokenResponseHttpMessageConverter;
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 import org.springframework.web.client.ResponseErrorHandler;
 import org.springframework.web.client.RestClientException;
 import org.springframework.web.client.RestOperations;
@@ -76,19 +75,12 @@ public final class DefaultAuthorizationCodeTokenResponseClient
 		Assert.notNull(authorizationCodeGrantRequest, "authorizationCodeGrantRequest cannot be null");
 		RequestEntity<?> request = this.requestEntityConverter.convert(authorizationCodeGrantRequest);
 		ResponseEntity<OAuth2AccessTokenResponse> response = getResponse(request);
-		OAuth2AccessTokenResponse tokenResponse = response.getBody();
-		if (CollectionUtils.isEmpty(tokenResponse.getAccessToken().getScopes())) {
-			// As per spec, in Section 5.1 Successful Access Token Response
-			// https://tools.ietf.org/html/rfc6749#section-5.1
-			// If AccessTokenResponse.scope is empty, then default to the scope
-			// originally requested by the client in the Token Request
-			// @formatter:off
-			tokenResponse = OAuth2AccessTokenResponse.withResponse(tokenResponse)
-					.scopes(authorizationCodeGrantRequest.getClientRegistration().getScopes())
-					.build();
-			// @formatter:on
-		}
-		return tokenResponse;
+		// As per spec, in Section 5.1 Successful Access Token Response
+		// https://tools.ietf.org/html/rfc6749#section-5.1
+		// If AccessTokenResponse.scope is empty, then we assume all requested scopes were
+		// granted.
+		// However, we use the explicit scopes returned in the response (if any).
+		return response.getBody();
 	}
 
 	private ResponseEntity<OAuth2AccessTokenResponse> getResponse(RequestEntity<?> request) {

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/DefaultClientCredentialsTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -30,7 +30,6 @@ import org.springframework.security.oauth2.core.OAuth2Error;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
 import org.springframework.security.oauth2.core.http.converter.OAuth2AccessTokenResponseHttpMessageConverter;
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 import org.springframework.web.client.ResponseErrorHandler;
 import org.springframework.web.client.RestClientException;
 import org.springframework.web.client.RestOperations;
@@ -76,19 +75,12 @@ public final class DefaultClientCredentialsTokenResponseClient
 		Assert.notNull(clientCredentialsGrantRequest, "clientCredentialsGrantRequest cannot be null");
 		RequestEntity<?> request = this.requestEntityConverter.convert(clientCredentialsGrantRequest);
 		ResponseEntity<OAuth2AccessTokenResponse> response = getResponse(request);
-		OAuth2AccessTokenResponse tokenResponse = response.getBody();
-		if (CollectionUtils.isEmpty(tokenResponse.getAccessToken().getScopes())) {
-			// As per spec, in Section 5.1 Successful Access Token Response
-			// https://tools.ietf.org/html/rfc6749#section-5.1
-			// If AccessTokenResponse.scope is empty, then default to the scope
-			// originally requested by the client in the Token Request
-			// @formatter:off
-			tokenResponse = OAuth2AccessTokenResponse.withResponse(tokenResponse)
-					.scopes(clientCredentialsGrantRequest.getClientRegistration().getScopes())
-					.build();
-			// @formatter:on
-		}
-		return tokenResponse;
+		// As per spec, in Section 5.1 Successful Access Token Response
+		// https://tools.ietf.org/html/rfc6749#section-5.1
+		// If AccessTokenResponse.scope is empty, then we assume all requested scopes were
+		// granted.
+		// However, we use the explicit scopes returned in the response (if any).
+		return response.getBody();
 	}
 
 	private ResponseEntity<OAuth2AccessTokenResponse> getResponse(RequestEntity<?> request) {

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/DefaultPasswordTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -30,7 +30,6 @@ import org.springframework.security.oauth2.core.OAuth2Error;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
 import org.springframework.security.oauth2.core.http.converter.OAuth2AccessTokenResponseHttpMessageConverter;
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 import org.springframework.web.client.ResponseErrorHandler;
 import org.springframework.web.client.RestClientException;
 import org.springframework.web.client.RestOperations;
@@ -75,16 +74,12 @@ public final class DefaultPasswordTokenResponseClient
 		Assert.notNull(passwordGrantRequest, "passwordGrantRequest cannot be null");
 		RequestEntity<?> request = this.requestEntityConverter.convert(passwordGrantRequest);
 		ResponseEntity<OAuth2AccessTokenResponse> response = getResponse(request);
-		OAuth2AccessTokenResponse tokenResponse = response.getBody();
-		if (CollectionUtils.isEmpty(tokenResponse.getAccessToken().getScopes())) {
-			// As per spec, in Section 5.1 Successful Access Token Response
-			// https://tools.ietf.org/html/rfc6749#section-5.1
-			// If AccessTokenResponse.scope is empty, then default to the scope
-			// originally requested by the client in the Token Request
-			tokenResponse = OAuth2AccessTokenResponse.withResponse(tokenResponse)
-					.scopes(passwordGrantRequest.getClientRegistration().getScopes()).build();
-		}
-		return tokenResponse;
+		// As per spec, in Section 5.1 Successful Access Token Response
+		// https://tools.ietf.org/html/rfc6749#section-5.1
+		// If AccessTokenResponse.scope is empty, then we assume all requested scopes were
+		// granted.
+		// However, we use the explicit scopes returned in the response (if any).
+		return response.getBody();
 	}
 
 	private ResponseEntity<OAuth2AccessTokenResponse> getResponse(RequestEntity<?> request) {

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/WebClientReactiveAuthorizationCodeTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -65,11 +65,6 @@ public class WebClientReactiveAuthorizationCodeTokenResponseClient
 		return Collections.emptySet();
 	}
 
-	@Override
-	Set<String> defaultScopes(OAuth2AuthorizationCodeGrantRequest grantRequest) {
-		return grantRequest.getAuthorizationExchange().getAuthorizationRequest().getScopes();
-	}
-
 	@Override
 	BodyInserters.FormInserter<String> populateTokenRequestBody(OAuth2AuthorizationCodeGrantRequest grantRequest,
 			BodyInserters.FormInserter<String> body) {

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/WebClientReactiveClientCredentialsTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/WebClientReactivePasswordTokenResponseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/DefaultAuthorizationCodeTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -220,7 +220,7 @@ public class DefaultAuthorizationCodeTokenResponseClientTests {
 	}
 
 	@Test
-	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenAccessTokenHasDefaultScope() {
+	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenAccessTokenHasNoScope() {
 		// @formatter:off
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
@@ -232,7 +232,7 @@ public class DefaultAuthorizationCodeTokenResponseClientTests {
 		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
 		OAuth2AccessTokenResponse accessTokenResponse = this.tokenResponseClient
 				.getTokenResponse(this.authorizationCodeGrantRequest());
-		assertThat(accessTokenResponse.getAccessToken().getScopes()).containsExactly("read", "write");
+		assertThat(accessTokenResponse.getAccessToken().getScopes()).isEmpty();
 	}
 
 	@Test

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/DefaultClientCredentialsTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -222,7 +222,7 @@ public class DefaultClientCredentialsTokenResponseClientTests {
 	}
 
 	@Test
-	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenAccessTokenHasDefaultScope() {
+	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenAccessTokenHasNoScope() {
 		// @formatter:off
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
@@ -235,7 +235,7 @@ public class DefaultClientCredentialsTokenResponseClientTests {
 				this.clientRegistration);
 		OAuth2AccessTokenResponse accessTokenResponse = this.tokenResponseClient
 				.getTokenResponse(clientCredentialsGrantRequest);
-		assertThat(accessTokenResponse.getAccessToken().getScopes()).containsExactly("read", "write");
+		assertThat(accessTokenResponse.getAccessToken().getScopes()).isEmpty();
 	}
 
 	@Test

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/DefaultPasswordTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -92,7 +92,8 @@ public class DefaultPasswordTokenResponseClientTests {
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
 			+ "   \"token_type\": \"bearer\",\n"
-			+ "   \"expires_in\": \"3600\"\n"
+			+ "   \"expires_in\": \"3600\",\n"
+			+ "   \"scope\": \"read write\"\n"
 			+ "}\n";
 		// @formatter:on
 		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
@@ -126,7 +127,8 @@ public class DefaultPasswordTokenResponseClientTests {
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
 			+ "   \"token_type\": \"bearer\",\n"
-			+ "   \"expires_in\": \"3600\"\n"
+			+ "   \"expires_in\": \"3600\",\n"
+			+ "   \"scope\": \"read\"\n"
 			+ "}\n";
 		// @formatter:on
 		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
@@ -181,6 +183,22 @@ public class DefaultPasswordTokenResponseClientTests {
 		assertThat(accessTokenResponse.getAccessToken().getScopes()).containsExactly("read");
 	}
 
+	@Test
+	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenAccessTokenHasNoScope() {
+		// @formatter:off
+		String accessTokenSuccessResponse = "{\n"
+			+ "   \"access_token\": \"access-token-1234\",\n"
+			+ "   \"token_type\": \"bearer\",\n"
+			+ "   \"expires_in\": \"3600\"\n"
+			+ "}\n";
+		// @formatter:on
+		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
+		OAuth2PasswordGrantRequest passwordGrantRequest = new OAuth2PasswordGrantRequest(
+				this.clientRegistrationBuilder.build(), this.username, this.password);
+		OAuth2AccessTokenResponse accessTokenResponse = this.tokenResponseClient.getTokenResponse(passwordGrantRequest);
+		assertThat(accessTokenResponse.getAccessToken().getScopes()).isEmpty();
+	}
+
 	@Test
 	public void getTokenResponseWhenErrorResponseThenThrowOAuth2AuthorizationException() {
 		String accessTokenErrorResponse = "{\n" + "   \"error\": \"unauthorized_client\"\n" + "}\n";

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/DefaultRefreshTokenTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -96,7 +96,8 @@ public class DefaultRefreshTokenTokenResponseClientTests {
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
 			+ "   \"token_type\": \"bearer\",\n"
-			+ "   \"expires_in\": \"3600\"\n"
+			+ "   \"expires_in\": \"3600\",\n"
+			+ "   \"scope\": \"read write\"\n"
 			+ "}\n";
 		// @formatter:on
 		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
@@ -123,6 +124,26 @@ public class DefaultRefreshTokenTokenResponseClientTests {
 		assertThat(accessTokenResponse.getRefreshToken().getTokenValue()).isEqualTo(this.refreshToken.getTokenValue());
 	}
 
+	@Test
+	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenAccessTokenHasOriginalScope() {
+		// @formatter:off
+		String accessTokenSuccessResponse = "{\n"
+				+ "   \"access_token\": \"access-token-1234\",\n"
+				+ "   \"token_type\": \"bearer\",\n"
+				+ "   \"expires_in\": \"3600\"\n"
+				+ "}\n";
+		// @formatter:on
+		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
+		ClientRegistration clientRegistration = this.clientRegistrationBuilder
+				.clientAuthenticationMethod(ClientAuthenticationMethod.POST).build();
+		OAuth2RefreshTokenGrantRequest refreshTokenGrantRequest = new OAuth2RefreshTokenGrantRequest(clientRegistration,
+				this.accessToken, this.refreshToken);
+		OAuth2AccessTokenResponse accessTokenResponse = this.tokenResponseClient
+				.getTokenResponse(refreshTokenGrantRequest);
+		assertThat(accessTokenResponse.getAccessToken().getScopes())
+				.containsExactly(this.accessToken.getScopes().toArray(new String[0]));
+	}
+
 	@Test
 	public void getTokenResponseWhenClientAuthenticationPostThenFormParametersAreSent() throws Exception {
 		String accessTokenSuccessResponse = "{\n" + "	\"access_token\": \"access-token-1234\",\n"

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/WebClientReactiveAuthorizationCodeTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -236,7 +236,7 @@ public class WebClientReactiveAuthorizationCodeTokenResponseClientTests {
 	}
 
 	@Test
-	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenReturnAccessTokenResponseUsingRequestedScope() {
+	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenReturnAccessTokenResponseWithNoScopes() {
 		// @formatter:off
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
@@ -248,8 +248,7 @@ public class WebClientReactiveAuthorizationCodeTokenResponseClientTests {
 		this.clientRegistration.scope("openid", "profile", "email", "address");
 		OAuth2AccessTokenResponse accessTokenResponse = this.tokenResponseClient
 				.getTokenResponse(authorizationCodeGrantRequest()).block();
-		assertThat(accessTokenResponse.getAccessToken().getScopes()).containsExactly("openid", "profile", "email",
-				"address");
+		assertThat(accessTokenResponse.getAccessToken().getScopes()).isEmpty();
 	}
 
 	private OAuth2AuthorizationCodeGrantRequest authorizationCodeGrantRequest() {

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/WebClientReactiveClientCredentialsTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -84,6 +84,7 @@ public class WebClientReactiveClientCredentialsTokenResponseClientTests {
 		RecordedRequest actualRequest = this.server.takeRequest();
 		String body = actualRequest.getUtf8Body();
 		assertThat(response.getAccessToken()).isNotNull();
+		assertThat(response.getAccessToken().getScopes()).containsExactly("create");
 		assertThat(actualRequest.getHeader(HttpHeaders.AUTHORIZATION))
 				.isEqualTo("Basic Y2xpZW50LWlkOmNsaWVudC1zZWNyZXQ=");
 		assertThat(body).isEqualTo("grant_type=client_credentials&scope=read%3Auser");
@@ -107,13 +108,14 @@ public class WebClientReactiveClientCredentialsTokenResponseClientTests {
 		RecordedRequest actualRequest = this.server.takeRequest();
 		String body = actualRequest.getUtf8Body();
 		assertThat(response.getAccessToken()).isNotNull();
+		assertThat(response.getAccessToken().getScopes()).containsExactly("create");
 		assertThat(actualRequest.getHeader(HttpHeaders.AUTHORIZATION)).isNull();
 		assertThat(body).isEqualTo(
 				"grant_type=client_credentials&client_id=client-id&client_secret=client-secret&scope=read%3Auser");
 	}
 
 	@Test
-	public void getTokenResponseWhenNoScopeThenClientRegistrationScopesDefaulted() {
+	public void getTokenResponseWhenNoScopeThenReturnAccessTokenResponseWithNoScopes() {
 		ClientRegistration registration = this.clientRegistration.build();
 		// @formatter:off
 		enqueueJson("{\n"
@@ -125,7 +127,7 @@ public class WebClientReactiveClientCredentialsTokenResponseClientTests {
 		// @formatter:on
 		OAuth2ClientCredentialsGrantRequest request = new OAuth2ClientCredentialsGrantRequest(registration);
 		OAuth2AccessTokenResponse response = this.client.getTokenResponse(request).block();
-		assertThat(response.getAccessToken().getScopes()).isEqualTo(registration.getScopes());
+		assertThat(response.getAccessToken().getScopes()).isEmpty();
 	}
 
 	@Test

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/endpoint/WebClientReactivePasswordTokenResponseClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -80,7 +80,8 @@ public class WebClientReactivePasswordTokenResponseClientTests {
 	}
 
 	@Test
-	public void getTokenResponseWhenSuccessResponseThenReturnAccessTokenResponse() throws Exception {
+	public void getTokenResponseWhenSuccessResponseDoesNotIncludeScopeThenReturnAccessTokenResponseWithNoScope()
+			throws Exception {
 		// @formatter:off
 		String accessTokenSuccessResponse = "{\n"
 			+ "   \"access_token\": \"access-token-1234\",\n"
@@ -109,6 +110,41 @@ public class WebClientReactivePasswordTokenResponseClientTests {
 		assertThat(accessTokenResponse.getAccessToken().getTokenValue()).isEqualTo("access-token-1234");
 		assertThat(accessTokenResponse.getAccessToken().getTokenType()).isEqualTo(OAuth2AccessToken.TokenType.BEARER);
 		assertThat(accessTokenResponse.getAccessToken().getExpiresAt()).isBetween(expiresAtBefore, expiresAtAfter);
+		assertThat(accessTokenResponse.getAccessToken().getScopes()).isEmpty();
+		assertThat(accessTokenResponse.getRefreshToken()).isNull();
+	}
+
+	@Test
+	public void getTokenResponseWhenSuccessResponseIncludesScopeThenReturnAccessTokenResponse() throws Exception {
+		// @formatter:off
+		String accessTokenSuccessResponse = "{\n"
+			+ "   \"access_token\": \"access-token-1234\",\n"
+			+ "   \"token_type\": \"bearer\",\n"
+			+ "   \"expires_in\": \"3600\",\n"
+			+ "   \"scope\": \"read write\"\n"
+			+ "}\n";
+		// @formatter:on
+		this.server.enqueue(jsonResponse(accessTokenSuccessResponse));
+		Instant expiresAtBefore = Instant.now().plusSeconds(3600);
+		ClientRegistration clientRegistration = this.clientRegistrationBuilder.build();
+		OAuth2PasswordGrantRequest passwordGrantRequest = new OAuth2PasswordGrantRequest(clientRegistration,
+				this.username, this.password);
+		OAuth2AccessTokenResponse accessTokenResponse = this.tokenResponseClient.getTokenResponse(passwordGrantRequest)
+				.block();
+		Instant expiresAtAfter = Instant.now().plusSeconds(3600);
+		RecordedRequest recordedRequest = this.server.takeRequest();
+		assertThat(recordedRequest.getMethod()).isEqualTo(HttpMethod.POST.toString());
+		assertThat(recordedRequest.getHeader(HttpHeaders.ACCEPT)).isEqualTo(MediaType.APPLICATION_JSON_VALUE);
+		assertThat(recordedRequest.getHeader(HttpHeaders.CONTENT_TYPE))
+				.isEqualTo(MediaType.APPLICATION_FORM_URLENCODED_VALUE + ";charset=UTF-8");
+		String formParameters = recordedRequest.getBody().readUtf8();
+		assertThat(formParameters).contains("grant_type=password");
+		assertThat(formParameters).contains("username=user1");
+		assertThat(formParameters).contains("password=password");
+		assertThat(formParameters).contains("scope=read+write");
+		assertThat(accessTokenResponse.getAccessToken().getTokenValue()).isEqualTo("access-token-1234");
+		assertThat(accessTokenResponse.getAccessToken().getTokenType()).isEqualTo(OAuth2AccessToken.TokenType.BEARER);
+		assertThat(accessTokenResponse.getAccessToken().getExpiresAt()).isBetween(expiresAtBefore, expiresAtAfter);
 		assertThat(accessTokenResponse.getAccessToken().getScopes())
 				.containsExactly(clientRegistration.getScopes().toArray(new String[0]));
 		assertThat(accessTokenResponse.getRefreshToken()).isNull();