Enable PKCE by default in authorization server

Closes gh-18020

config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationCodeGrantTests.java

@@ -26,6 +26,7 @@ import java.time.Instant;
 import java.time.temporal.ChronoUnit;
 import java.util.Arrays;
 import java.util.Base64;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -359,7 +360,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		this.registeredClientRepository.save(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		this.authorizationService.save(authorization);
 
 		OAuth2AccessTokenResponse accessTokenResponse = assertTokenRequestReturnsAccessTokenResponse(registeredClient,
@@ -384,7 +385,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		this.registeredClientRepository.save(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		this.authorizationService.save(authorization);
 
 		assertTokenRequestReturnsAccessTokenResponse(registeredClient, authorization,
@@ -433,8 +434,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 		MvcResult mvcResult = this.mvc
 			.perform(get(DEFAULT_AUTHORIZATION_ENDPOINT_URI)
 				.queryParams(getAuthorizationRequestParameters(registeredClient))
-				.queryParam(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE)
-				.queryParam(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256")
 				.with(user("user")))
 			.andExpect(status().is3xxRedirection())
 			.andReturn();
@@ -451,8 +450,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		this.mvc
 			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI)
 				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
-				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER))
+				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId()))
 			.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
 			.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
 			.andExpect(status().isOk())
@@ -487,8 +485,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 		MvcResult mvcResult = this.mvc
 			.perform(get(DEFAULT_AUTHORIZATION_ENDPOINT_URI)
 				.queryParams(getAuthorizationRequestParameters(registeredClient))
-				.queryParam(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE)
-				.queryParam(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256")
 				.with(user("user")))
 			.andExpect(status().is3xxRedirection())
 			.andReturn();
@@ -505,8 +501,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		this.mvc
 			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI)
 				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
-				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER))
+				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId()))
 			.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
 			.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
 			.andExpect(status().isOk())
@@ -542,11 +537,11 @@ public class OAuth2AuthorizationCodeGrantTests {
 		tokenRequestParameters.set(OAuth2ParameterNames.CODE, "");
 		tokenRequestParameters.set(OAuth2ParameterNames.REDIRECT_URI,
 				registeredClient.getRedirectUris().iterator().next());
+		tokenRequestParameters.set(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER);
 
 		this.mvc
 			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI).params(tokenRequestParameters)
-				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER))
+				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId()))
 			.andExpect(status().isBadRequest());
 	}
 
@@ -561,8 +556,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 				registeredClient);
 		MvcResult mvcResult = this.mvc
 			.perform(get(DEFAULT_AUTHORIZATION_ENDPOINT_URI).queryParams(authorizationRequestParameters)
-				.queryParam(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE)
-				.queryParam(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256")
 				.with(user("user")))
 			.andExpect(status().is3xxRedirection())
 			.andReturn();
@@ -577,9 +570,12 @@ public class OAuth2AuthorizationCodeGrantTests {
 		assertThat(authorizationCodeAuthorization.getAuthorizationGrantType())
 			.isEqualTo(AuthorizationGrantType.AUTHORIZATION_CODE);
 
+		MultiValueMap<String, String> tokenRequestParameters = getTokenRequestParameters(registeredClient,
+				authorizationCodeAuthorization);
+		tokenRequestParameters.remove(PkceParameterNames.CODE_VERIFIER);
+
 		this.mvc
-			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI)
-				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
+			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI).params(tokenRequestParameters)
 				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
 				.header(HttpHeaders.AUTHORIZATION, getAuthorizationHeader(registeredClient)))
 			.andExpect(status().isBadRequest());
@@ -595,11 +591,12 @@ public class OAuth2AuthorizationCodeGrantTests {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().redirectUris((redirectUris) -> {
 			redirectUris.clear();
 			redirectUris.add(redirectUri);
-		}).clientSettings(ClientSettings.builder().requireProofKey(true).build()).build();
+		}).build();
 		this.registeredClientRepository.save(registeredClient);
 
 		MultiValueMap<String, String> authorizationRequestParameters = getAuthorizationRequestParameters(
 				registeredClient);
+		authorizationRequestParameters.remove(PkceParameterNames.CODE_CHALLENGE);
 		MvcResult mvcResult = this.mvc
 			.perform(get(DEFAULT_AUTHORIZATION_ENDPOINT_URI).queryParams(authorizationRequestParameters)
 				.with(user("user")))
@@ -618,11 +615,14 @@ public class OAuth2AuthorizationCodeGrantTests {
 			throws Exception {
 		this.spring.register(AuthorizationServerConfiguration.class).autowire();
 
-		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient()
+			.clientSettings(ClientSettings.builder().requireProofKey(false).build())
+			.build();
 		this.registeredClientRepository.save(registeredClient);
 
 		MultiValueMap<String, String> authorizationRequestParameters = getAuthorizationRequestParameters(
 				registeredClient);
+		authorizationRequestParameters.remove(PkceParameterNames.CODE_CHALLENGE);
 		MvcResult mvcResult = this.mvc
 			.perform(get(DEFAULT_AUTHORIZATION_ENDPOINT_URI).queryParams(authorizationRequestParameters)
 				.with(user("user")))
@@ -642,7 +642,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 		this.mvc
 			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI)
 				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER)
 				.header(HttpHeaders.AUTHORIZATION, getAuthorizationHeader(registeredClient)))
 			.andExpect(status().isBadRequest());
 	}
@@ -654,7 +653,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		this.registeredClientRepository.save(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		this.authorizationService.save(authorization);
 
 		this.mvc
@@ -704,10 +703,14 @@ public class OAuth2AuthorizationCodeGrantTests {
 		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient)
 			.principalName("user")
 			.build();
+		Map<String, Object> additionalParameters = new HashMap<>();
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
 		OAuth2AuthorizationRequest authorizationRequest = authorization
 			.getAttribute(OAuth2AuthorizationRequest.class.getName());
 		OAuth2AuthorizationRequest updatedAuthorizationRequest = OAuth2AuthorizationRequest.from(authorizationRequest)
 			.state(STATE_URL_UNENCODED)
+			.additionalParameters(additionalParameters)
 			.build();
 		authorization = OAuth2Authorization.from(authorization)
 			.attribute(OAuth2AuthorizationRequest.class.getName(), updatedAuthorizationRequest)
@@ -793,7 +796,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 			.build();
 		this.registeredClientRepository.save(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		OAuth2AuthorizationRequest authorizationRequest = authorization
 			.getAttribute(OAuth2AuthorizationRequest.class.getName());
 		OAuth2AuthorizationRequest updatedAuthorizationRequest = OAuth2AuthorizationRequest.from(authorizationRequest)
@@ -906,8 +909,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 		MvcResult mvcResult = this.mvc
 			.perform(get(DEFAULT_AUTHORIZATION_ENDPOINT_URI)
 				.queryParams(getAuthorizationRequestParameters(registeredClient))
-				.queryParam(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE)
-				.queryParam(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256")
 				.with(user("user")))
 			.andExpect(status().is3xxRedirection())
 			.andReturn();
@@ -926,8 +927,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		mvcResult = this.mvc
 			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI)
 				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
-				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER))
+				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId()))
 			.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
 			.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
 			.andExpect(status().isOk())
@@ -956,8 +956,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 		MvcResult mvcResult = this.mvc
 			.perform(get(issuer.concat(DEFAULT_AUTHORIZATION_ENDPOINT_URI))
 				.queryParams(getAuthorizationRequestParameters(registeredClient))
-				.queryParam(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE)
-				.queryParam(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256")
 				.with(user("user")))
 			.andExpect(status().is3xxRedirection())
 			.andReturn();
@@ -969,8 +967,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		this.mvc
 			.perform(post(issuer.concat(DEFAULT_TOKEN_ENDPOINT_URI))
 				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
-				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER))
+				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId()))
 			.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
 			.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
 			.andExpect(status().isOk())
@@ -994,7 +991,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		this.registeredClientRepository.save(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		this.authorizationService.save(authorization);
 
 		String tokenEndpointUri = "http://localhost" + DEFAULT_TOKEN_ENDPOINT_URI;
@@ -1025,8 +1022,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 
 		MvcResult mvcResult = this.mvc
 			.perform(post("/oauth2/par").params(getAuthorizationRequestParameters(registeredClient))
-				.param(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE)
-				.param(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256")
 				.header(HttpHeaders.AUTHORIZATION, getAuthorizationHeader(registeredClient)))
 			.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
 			.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
@@ -1053,7 +1048,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 			.perform(post(DEFAULT_TOKEN_ENDPOINT_URI)
 				.params(getTokenRequestParameters(registeredClient, authorizationCodeAuthorization))
 				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
-				.param(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER)
 				.header(HttpHeaders.AUTHORIZATION, getAuthorizationHeader(registeredClient)))
 			.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
 			.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
@@ -1077,6 +1071,13 @@ public class OAuth2AuthorizationCodeGrantTests {
 			.isEqualTo(true);
 	}
 
+	private static OAuth2Authorization createAuthorization(RegisteredClient registeredClient) {
+		Map<String, Object> additionalParameters = new HashMap<>();
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
+		return TestOAuth2Authorizations.authorization(registeredClient, additionalParameters).build();
+	}
+
 	private static String generateDPoPProof(String tokenEndpointUri) {
 		// @formatter:off
 		Map<String, Object> publicJwk = TestJwks.DEFAULT_EC_JWK
@@ -1105,6 +1106,8 @@ public class OAuth2AuthorizationCodeGrantTests {
 		parameters.set(OAuth2ParameterNames.SCOPE,
 				StringUtils.collectionToDelimitedString(registeredClient.getScopes(), " "));
 		parameters.set(OAuth2ParameterNames.STATE, STATE_URL_UNENCODED);
+		parameters.set(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		parameters.set(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
 		return parameters;
 	}
 
@@ -1115,6 +1118,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 		parameters.set(OAuth2ParameterNames.CODE,
 				authorization.getToken(OAuth2AuthorizationCode.class).getToken().getTokenValue());
 		parameters.set(OAuth2ParameterNames.REDIRECT_URI, registeredClient.getRedirectUris().iterator().next());
+		parameters.set(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER);
 		return parameters;
 	}
 

config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2TokenIntrospectionTests.java

@@ -89,6 +89,7 @@ import org.springframework.security.oauth2.server.authorization.client.TestRegis
 import org.springframework.security.oauth2.server.authorization.http.converter.OAuth2TokenIntrospectionHttpMessageConverter;
 import org.springframework.security.oauth2.server.authorization.jackson2.TestingAuthenticationTokenMixin;
 import org.springframework.security.oauth2.server.authorization.settings.AuthorizationServerSettings;
+import org.springframework.security.oauth2.server.authorization.settings.ClientSettings;
 import org.springframework.security.oauth2.server.authorization.settings.OAuth2TokenFormat;
 import org.springframework.security.oauth2.server.authorization.settings.TokenSettings;
 import org.springframework.security.oauth2.server.authorization.token.OAuth2TokenClaimsContext;
@@ -310,6 +311,7 @@ public class OAuth2TokenIntrospectionTests {
 				.build();
 		RegisteredClient authorizedRegisteredClient = TestRegisteredClients.registeredClient()
 				.tokenSettings(tokenSettings)
+				.clientSettings(ClientSettings.builder().requireProofKey(false).build())
 				.build();
 		// @formatter:on
 		this.registeredClientRepository.save(authorizedRegisteredClient);

config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OidcTests.java

@@ -22,8 +22,10 @@ import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.security.Principal;
 import java.util.Base64;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 
 import com.nimbusds.jose.jwk.JWKSet;
@@ -69,6 +71,7 @@ import org.springframework.security.oauth2.core.OAuth2Token;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
 import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.security.oauth2.core.endpoint.PkceParameterNames;
 import org.springframework.security.oauth2.core.http.converter.OAuth2AccessTokenResponseHttpMessageConverter;
 import org.springframework.security.oauth2.core.oidc.OidcScopes;
 import org.springframework.security.oauth2.core.oidc.endpoint.OidcParameterNames;
@@ -133,6 +136,12 @@ public class OidcTests {
 
 	private static final String DEFAULT_OIDC_LOGOUT_ENDPOINT_URI = "/connect/logout";
 
+	// See RFC 7636: Appendix B. Example for the S256 code_challenge_method
+	// https://tools.ietf.org/html/rfc7636#appendix-B
+	private static final String S256_CODE_VERIFIER = "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk";
+
+	private static final String S256_CODE_CHALLENGE = "E9Melhoa2OwvFrEMTJguCHaoeK1t8URWbuGJSstw-cM";
+
 	private static final String AUTHORITIES_CLAIM = "authorities";
 
 	private static final OAuth2TokenType AUTHORIZATION_CODE_TOKEN_TYPE = new OAuth2TokenType(OAuth2ParameterNames.CODE);
@@ -462,7 +471,7 @@ public class OidcTests {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().scope(OidcScopes.OPENID).build();
 		this.registeredClientRepository.save(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		this.authorizationService.save(authorization);
 
 		this.mvc
@@ -557,6 +566,13 @@ public class OidcTests {
 			.andReturn();
 	}
 
+	private static OAuth2Authorization createAuthorization(RegisteredClient registeredClient) {
+		Map<String, Object> additionalParameters = new HashMap<>();
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
+		return TestOAuth2Authorizations.authorization(registeredClient, additionalParameters).build();
+	}
+
 	private static MultiValueMap<String, String> getAuthorizationRequestParameters(RegisteredClient registeredClient) {
 		MultiValueMap<String, String> parameters = new LinkedMultiValueMap<>();
 		parameters.set(OAuth2ParameterNames.RESPONSE_TYPE, OAuth2AuthorizationResponseType.CODE.getValue());
@@ -565,6 +581,8 @@ public class OidcTests {
 		parameters.set(OAuth2ParameterNames.SCOPE,
 				StringUtils.collectionToDelimitedString(registeredClient.getScopes(), " "));
 		parameters.set(OAuth2ParameterNames.STATE, "state");
+		parameters.set(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		parameters.set(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
 		return parameters;
 	}
 
@@ -575,6 +593,7 @@ public class OidcTests {
 		parameters.set(OAuth2ParameterNames.CODE,
 				authorization.getToken(OAuth2AuthorizationCode.class).getToken().getTokenValue());
 		parameters.set(OAuth2ParameterNames.REDIRECT_URI, registeredClient.getRedirectUris().iterator().next());
+		parameters.set(PkceParameterNames.CODE_VERIFIER, S256_CODE_VERIFIER);
 		return parameters;
 	}
 

oauth2/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/settings/ClientSettings.java

@@ -44,7 +44,7 @@ public final class ClientSettings extends AbstractSettings {
 	/**
 	 * Returns {@code true} if the client is required to provide a proof key challenge and
 	 * verifier when performing the Authorization Code Grant flow. The default is
-	 * {@code false}.
+	 * {@code true}.
 	 * @return {@code true} if the client is required to provide a proof key challenge and
 	 * verifier, {@code false} otherwise
 	 */
@@ -99,7 +99,7 @@ public final class ClientSettings extends AbstractSettings {
 	 * @return the {@link Builder}
 	 */
 	public static Builder builder() {
-		return new Builder().requireProofKey(false).requireAuthorizationConsent(false);
+		return new Builder().requireProofKey(true).requireAuthorizationConsent(false);
 	}
 
 	/**

oauth2/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/ClientSecretAuthenticationProviderTests.java

@@ -267,11 +267,12 @@ public class ClientSecretAuthenticationProviderTests {
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		given(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(AUTHORIZATION_CODE_TOKEN_TYPE)))
-			.willReturn(TestOAuth2Authorizations.authorization().build());
+			.willReturn(authorization);
 		OAuth2ClientAuthenticationToken authentication = new OAuth2ClientAuthenticationToken(
 				registeredClient.getClientId(), ClientAuthenticationMethod.CLIENT_SECRET_BASIC,
-				registeredClient.getClientSecret(), createAuthorizationCodeTokenParameters());
+				registeredClient.getClientSecret(), createPkceTokenParameters(S256_CODE_VERIFIER));
 		OAuth2ClientAuthenticationToken authenticationResult = (OAuth2ClientAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
 
@@ -289,9 +290,7 @@ public class ClientSecretAuthenticationProviderTests {
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations
-			.authorization(registeredClient, createPkceAuthorizationParametersS256())
-			.build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		given(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(AUTHORIZATION_CODE_TOKEN_TYPE)))
 			.willReturn(authorization);
 
@@ -317,9 +316,7 @@ public class ClientSecretAuthenticationProviderTests {
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations
-			.authorization(registeredClient, createPkceAuthorizationParametersS256())
-			.build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		given(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(AUTHORIZATION_CODE_TOKEN_TYPE)))
 			.willReturn(authorization);
 
@@ -344,9 +341,7 @@ public class ClientSecretAuthenticationProviderTests {
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 
-		OAuth2Authorization authorization = TestOAuth2Authorizations
-			.authorization(registeredClient, createPkceAuthorizationParametersS256())
-			.build();
+		OAuth2Authorization authorization = createAuthorization(registeredClient);
 		given(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(AUTHORIZATION_CODE_TOKEN_TYPE)))
 			.willReturn(authorization);
 
@@ -366,6 +361,13 @@ public class ClientSecretAuthenticationProviderTests {
 		assertThat(authenticationResult.getRegisteredClient()).isEqualTo(registeredClient);
 	}
 
+	private static OAuth2Authorization createAuthorization(RegisteredClient registeredClient) {
+		Map<String, Object> parameters = new HashMap<>();
+		parameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
+		parameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		return TestOAuth2Authorizations.authorization(registeredClient, parameters).build();
+	}
+
 	private static Map<String, Object> createAuthorizationCodeTokenParameters() {
 		Map<String, Object> parameters = new HashMap<>();
 		parameters.put(OAuth2ParameterNames.GRANT_TYPE, AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
@@ -379,11 +381,4 @@ public class ClientSecretAuthenticationProviderTests {
 		return parameters;
 	}
 
-	private static Map<String, Object> createPkceAuthorizationParametersS256() {
-		Map<String, Object> parameters = new HashMap<>();
-		parameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
-		parameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
-		return parameters;
-	}
-
 }

oauth2/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2AuthorizationCodeRequestAuthenticationProviderTests.java

@@ -75,6 +75,12 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 
 	private static final String AUTHORIZATION_URI = "https://provider.com/oauth2/authorize";
 
+	// See RFC 7636: Appendix B. Example for the S256 code_challenge_method
+	// https://tools.ietf.org/html/rfc7636#appendix-B
+	private static final String S256_CODE_VERIFIER = "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk";
+
+	private static final String S256_CODE_CHALLENGE = "E9Melhoa2OwvFrEMTJguCHaoeK1t8URWbuGJSstw-cM";
+
 	private static final String STATE = "state";
 
 	private static final OAuth2TokenType STATE_TOKEN_TYPE = new OAuth2TokenType(OAuth2ParameterNames.STATE);
@@ -225,7 +231,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 			.willReturn(registeredClient);
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, "https://127.0.0.1:5000", STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -244,7 +250,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 			.willReturn(registeredClient);
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, "https://[::1]:5000", STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -319,9 +325,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 
 	@Test
 	public void authenticateWhenPkceRequiredAndMissingCodeChallengeThenThrowOAuth2AuthorizationCodeRequestAuthenticationException() {
-		RegisteredClient registeredClient = TestRegisteredClients.registeredClient()
-			.clientSettings(ClientSettings.builder().requireProofKey(true).build())
-			.build();
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
@@ -341,7 +345,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 			.willReturn(registeredClient);
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[0];
 		Map<String, Object> additionalParameters = new HashMap<>();
-		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, "code-challenge");
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
 		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "unsupported");
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
@@ -360,7 +364,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 			.willReturn(registeredClient);
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
 		Map<String, Object> additionalParameters = new HashMap<>();
-		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, "code-challenge");
+		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
 				registeredClient.getScopes(), additionalParameters);
@@ -394,7 +398,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put("prompt", prompt);
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
@@ -412,7 +416,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 			.willReturn(registeredClient);
 		this.principal.setAuthenticated(false);
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put("prompt", "none");
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
@@ -433,7 +437,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[1];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -451,7 +455,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		given(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 			.willReturn(registeredClient);
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put("prompt", "none");
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
@@ -473,7 +477,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[0];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationConsentAuthenticationToken authenticationResult = (OAuth2AuthorizationConsentAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -524,7 +528,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[1];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -551,7 +555,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -574,7 +578,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[1];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -592,12 +596,9 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 			.willReturn(registeredClient);
 
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[0];
-		Map<String, Object> additionalParameters = new HashMap<>();
-		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, "code-challenge");
-		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), additionalParameters);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -614,7 +615,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 
 		OAuth2PushedAuthorizationRequestUri pushedAuthorizationRequestUri = OAuth2PushedAuthorizationRequestUri
 			.create();
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put(OAuth2ParameterNames.REQUEST_URI, pushedAuthorizationRequestUri.getRequestUri());
 		OAuth2Authorization authorization = TestOAuth2Authorizations
 			.authorization(registeredClient, additionalParameters)
@@ -640,7 +641,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 
 		OAuth2PushedAuthorizationRequestUri pushedAuthorizationRequestUri = OAuth2PushedAuthorizationRequestUri
 			.create();
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put(OAuth2ParameterNames.REQUEST_URI, pushedAuthorizationRequestUri.getRequestUri());
 		OAuth2Authorization authorization = TestOAuth2Authorizations
 			.authorization(registeredClient, additionalParameters)
@@ -665,7 +666,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 
 		OAuth2PushedAuthorizationRequestUri pushedAuthorizationRequestUri = OAuth2PushedAuthorizationRequestUri
 			.create();
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put(OAuth2ParameterNames.REQUEST_URI, pushedAuthorizationRequestUri.getRequestUri());
 		OAuth2Authorization authorization = TestOAuth2Authorizations
 			.authorization(registeredClient, additionalParameters)
@@ -689,7 +690,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 
 		OAuth2PushedAuthorizationRequestUri pushedAuthorizationRequestUri = OAuth2PushedAuthorizationRequestUri
 			.create(Instant.now().minusSeconds(5));
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put(OAuth2ParameterNames.REQUEST_URI, pushedAuthorizationRequestUri.getRequestUri());
 		OAuth2Authorization authorization = TestOAuth2Authorizations
 			.authorization(registeredClient, additionalParameters)
@@ -721,7 +722,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[1];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		assertThatExceptionOfType(OAuth2AuthorizationCodeRequestAuthenticationException.class)
 			.isThrownBy(() -> this.authenticationProvider.authenticate(authentication))
@@ -746,7 +747,7 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
 		OAuth2AuthorizationCodeRequestAuthenticationToken authentication = new OAuth2AuthorizationCodeRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), this.principal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 
 		OAuth2AuthorizationCodeRequestAuthenticationToken authenticationResult = (OAuth2AuthorizationCodeRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
@@ -812,4 +813,11 @@ public class OAuth2AuthorizationCodeRequestAuthenticationProviderTests {
 		assertThat(authorizationCodeRequestAuthentication.getRedirectUri()).isEqualTo(redirectUri);
 	}
 
+	private static Map<String, Object> createPkceParameters() {
+		Map<String, Object> parameters = new HashMap<>();
+		parameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
+		parameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		return parameters;
+	}
+
 }

oauth2/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2PushedAuthorizationRequestAuthenticationProviderTests.java

@@ -40,7 +40,6 @@ import org.springframework.security.oauth2.server.authorization.OAuth2Authorizat
 import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
 import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
 import org.springframework.security.oauth2.server.authorization.client.TestRegisteredClients;
-import org.springframework.security.oauth2.server.authorization.settings.ClientSettings;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
@@ -57,6 +56,12 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 
 	private static final String AUTHORIZATION_URI = "https://provider.com/oauth2/par";
 
+	// See RFC 7636: Appendix B. Example for the S256 code_challenge_method
+	// https://tools.ietf.org/html/rfc7636#appendix-B
+	private static final String S256_CODE_VERIFIER = "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk";
+
+	private static final String S256_CODE_CHALLENGE = "E9Melhoa2OwvFrEMTJguCHaoeK1t8URWbuGJSstw-cM";
+
 	private static final String STATE = "state";
 
 	private OAuth2AuthorizationService authorizationService;
@@ -177,7 +182,7 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 				ClientAuthenticationMethod.CLIENT_SECRET_BASIC, registeredClient.getClientSecret());
 		OAuth2PushedAuthorizationRequestAuthenticationToken authentication = new OAuth2PushedAuthorizationRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), clientPrincipal, "https://127.0.0.1:5000", STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 		OAuth2PushedAuthorizationRequestAuthenticationToken authenticationResult = (OAuth2PushedAuthorizationRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
 		assertPushedAuthorizationResponse(registeredClient, authentication, authenticationResult);
@@ -192,7 +197,7 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 				ClientAuthenticationMethod.CLIENT_SECRET_BASIC, registeredClient.getClientSecret());
 		OAuth2PushedAuthorizationRequestAuthenticationToken authentication = new OAuth2PushedAuthorizationRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), clientPrincipal, "https://[::1]:5000", STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 		OAuth2PushedAuthorizationRequestAuthenticationToken authenticationResult = (OAuth2PushedAuthorizationRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
 		assertPushedAuthorizationResponse(registeredClient, authentication, authenticationResult);
@@ -246,9 +251,7 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 
 	@Test
 	public void authenticateWhenPkceRequiredAndMissingCodeChallengeThenThrowOAuth2AuthorizationCodeRequestAuthenticationException() {
-		RegisteredClient registeredClient = TestRegisteredClients.registeredClient()
-			.clientSettings(ClientSettings.builder().requireProofKey(true).build())
-			.build();
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient,
 				ClientAuthenticationMethod.CLIENT_SECRET_BASIC, registeredClient.getClientSecret());
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
@@ -320,7 +323,7 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient,
 				ClientAuthenticationMethod.CLIENT_SECRET_BASIC, registeredClient.getClientSecret());
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
-		Map<String, Object> additionalParameters = new HashMap<>();
+		Map<String, Object> additionalParameters = createPkceParameters();
 		additionalParameters.put("prompt", prompt);
 		OAuth2PushedAuthorizationRequestAuthenticationToken authentication = new OAuth2PushedAuthorizationRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), clientPrincipal, redirectUri, STATE,
@@ -337,12 +340,9 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient,
 				ClientAuthenticationMethod.CLIENT_SECRET_BASIC, registeredClient.getClientSecret());
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[0];
-		Map<String, Object> additionalParameters = new HashMap<>();
-		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE, "code-challenge");
-		additionalParameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
 		OAuth2PushedAuthorizationRequestAuthenticationToken authentication = new OAuth2PushedAuthorizationRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), clientPrincipal, redirectUri, STATE,
-				registeredClient.getScopes(), additionalParameters);
+				registeredClient.getScopes(), createPkceParameters());
 		OAuth2PushedAuthorizationRequestAuthenticationToken authenticationResult = (OAuth2PushedAuthorizationRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
 		assertPushedAuthorizationResponse(registeredClient, authentication, authenticationResult);
@@ -360,7 +360,7 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 		String redirectUri = registeredClient.getRedirectUris().toArray(new String[0])[2];
 		OAuth2PushedAuthorizationRequestAuthenticationToken authentication = new OAuth2PushedAuthorizationRequestAuthenticationToken(
 				AUTHORIZATION_URI, registeredClient.getClientId(), clientPrincipal, redirectUri, STATE,
-				registeredClient.getScopes(), null);
+				registeredClient.getScopes(), createPkceParameters());
 		OAuth2PushedAuthorizationRequestAuthenticationToken authenticationResult = (OAuth2PushedAuthorizationRequestAuthenticationToken) this.authenticationProvider
 			.authenticate(authentication);
 		assertPushedAuthorizationResponse(registeredClient, authentication, authenticationResult);
@@ -415,4 +415,11 @@ public class OAuth2PushedAuthorizationRequestAuthenticationProviderTests {
 		assertThat(authorizationCodeRequestAuthentication.getRedirectUri()).isEqualTo(redirectUri);
 	}
 
+	private static Map<String, Object> createPkceParameters() {
+		Map<String, Object> parameters = new HashMap<>();
+		parameters.put(PkceParameterNames.CODE_CHALLENGE_METHOD, "S256");
+		parameters.put(PkceParameterNames.CODE_CHALLENGE, S256_CODE_CHALLENGE);
+		return parameters;
+	}
+
 }

oauth2/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/settings/ClientSettingsTests.java

@@ -33,7 +33,7 @@ public class ClientSettingsTests {
 	public void buildWhenDefaultThenDefaultsAreSet() {
 		ClientSettings clientSettings = ClientSettings.builder().build();
 		assertThat(clientSettings.getSettings()).hasSize(2);
-		assertThat(clientSettings.isRequireProofKey()).isFalse();
+		assertThat(clientSettings.isRequireProofKey()).isTrue();
 		assertThat(clientSettings.isRequireAuthorizationConsent()).isFalse();
 	}