Polish gh-189

oauth2-authorization-server/spring-security-oauth2-authorization-server.gradle

@@ -16,7 +16,6 @@ dependencies {
 	testCompile 'org.assertj:assertj-core'
 	testCompile 'org.mockito:mockito-core'
 	testCompile 'com.jayway.jsonpath:json-path'
-	testCompile 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310'
 
 	provided 'javax.servlet:javax.servlet-api'
 }

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configuration/OAuth2AuthorizationServerConfiguration.java

@@ -15,6 +15,17 @@
  */
 package org.springframework.security.config.annotation.web.configuration;
 
+import java.util.HashSet;
+import java.util.Set;
+
+import com.nimbusds.jose.JWSAlgorithm;
+import com.nimbusds.jose.jwk.source.JWKSource;
+import com.nimbusds.jose.proc.JWSKeySelector;
+import com.nimbusds.jose.proc.JWSVerificationKeySelector;
+import com.nimbusds.jose.proc.SecurityContext;
+import com.nimbusds.jwt.proc.ConfigurableJWTProcessor;
+import com.nimbusds.jwt.proc.DefaultJWTProcessor;
+
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.Ordered;
@@ -22,6 +33,8 @@ import org.springframework.core.annotation.Order;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization.OAuth2AuthorizationServerConfigurer;
 import org.springframework.security.config.annotation.web.configurers.oauth2.server.resource.OAuth2ResourceServerConfigurer;
+import org.springframework.security.oauth2.jwt.JwtDecoder;
+import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
 import org.springframework.security.web.SecurityFilterChain;
 import org.springframework.security.web.util.matcher.RequestMatcher;
 
@@ -29,8 +42,8 @@ import org.springframework.security.web.util.matcher.RequestMatcher;
  * {@link Configuration} for OAuth 2.0 Authorization Server support.
  *
  * @author Joe Grandja
- * @see OAuth2AuthorizationServerConfigurer
  * @since 0.0.1
+ * @see OAuth2AuthorizationServerConfigurer
  */
 @Configuration(proxyBeanMethods = false)
 public class OAuth2AuthorizationServerConfiguration {
@@ -48,16 +61,32 @@ public class OAuth2AuthorizationServerConfiguration {
 				new OAuth2AuthorizationServerConfigurer<>();
 		RequestMatcher endpointsMatcher = authorizationServerConfigurer
 				.getEndpointsMatcher();
+
 		http
 			.requestMatcher(endpointsMatcher)
 			.authorizeRequests(authorizeRequests ->
-					authorizeRequests.anyRequest().authenticated()
-			).csrf(csrf -> csrf.ignoringRequestMatchers(endpointsMatcher))
+				authorizeRequests.anyRequest().authenticated()
+			)
+			.csrf(csrf -> csrf.ignoringRequestMatchers(endpointsMatcher))
+			.oauth2ResourceServer(OAuth2ResourceServerConfigurer::jwt)
 			.apply(authorizationServerConfigurer);
-
-		if (authorizationServerConfigurer.isOidcClientRegistrationEnabled()) {
-			http.oauth2ResourceServer(OAuth2ResourceServerConfigurer::jwt);
-		}
 	}
 	// @formatter:on
+
+	@Bean
+	public static JwtDecoder jwtDecoder(JWKSource<SecurityContext> jwkSource) {
+		Set<JWSAlgorithm> jwsAlgs = new HashSet<>();
+		jwsAlgs.addAll(JWSAlgorithm.Family.RSA);
+		jwsAlgs.addAll(JWSAlgorithm.Family.EC);
+		jwsAlgs.addAll(JWSAlgorithm.Family.HMAC_SHA);
+		ConfigurableJWTProcessor<SecurityContext> jwtProcessor = new DefaultJWTProcessor<>();
+		JWSKeySelector<SecurityContext> jwsKeySelector =
+				new JWSVerificationKeySelector<>(jwsAlgs, jwkSource);
+		jwtProcessor.setJWSKeySelector(jwsKeySelector);
+		// Override the default Nimbus claims set verifier as NimbusJwtDecoder handles it instead
+		jwtProcessor.setJWTClaimsSetVerifier((claims, context) -> {
+		});
+		return new NimbusJwtDecoder(jwtProcessor);
+	}
+
 }

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationServerConfigurer.java

@@ -44,9 +44,9 @@ import org.springframework.security.oauth2.server.authorization.authentication.O
 import org.springframework.security.oauth2.server.authorization.authentication.OAuth2RefreshTokenAuthenticationProvider;
 import org.springframework.security.oauth2.server.authorization.authentication.OAuth2TokenIntrospectionAuthenticationProvider;
 import org.springframework.security.oauth2.server.authorization.authentication.OAuth2TokenRevocationAuthenticationProvider;
-import org.springframework.security.oauth2.server.authorization.authentication.OidcClientRegistrationAuthenticationProvider;
 import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
 import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.oidc.authentication.OidcClientRegistrationAuthenticationProvider;
 import org.springframework.security.oauth2.server.authorization.oidc.web.OidcClientRegistrationEndpointFilter;
 import org.springframework.security.oauth2.server.authorization.oidc.web.OidcProviderConfigurationEndpointFilter;
 import org.springframework.security.oauth2.server.authorization.web.NimbusJwkSetEndpointFilter;
@@ -152,17 +152,6 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 		return this.endpointsMatcher;
 	}
 
-	/**
-	 * Returns {@code true} if the OIDC Client Registration endpoint is enabled.
-	 * The default is {@code false}.
-	 *
-	 * @return {@code true} if the OIDC Client Registration endpoint is enabled, {@code false} otherwise
-	 */
-	public boolean isOidcClientRegistrationEnabled() {
-		ProviderSettings providerSettings = getProviderSettings(this.getBuilder());
-		return providerSettings.isOidClientRegistrationEndpointEnabled();
-	}
-
 	@Override
 	public void init(B builder) {
 		ProviderSettings providerSettings = getProviderSettings(builder);
@@ -216,10 +205,12 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 						getAuthorizationService(builder));
 		builder.authenticationProvider(postProcess(tokenRevocationAuthenticationProvider));
 
-		OidcClientRegistrationAuthenticationProvider clientRegistrationAuthenticationProvider =
+		// TODO Make OpenID Client Registration an "opt-in" feature
+		OidcClientRegistrationAuthenticationProvider oidcClientRegistrationAuthenticationProvider =
 				new OidcClientRegistrationAuthenticationProvider(
+						getRegisteredClientRepository(builder),
 						getAuthorizationService(builder));
-		builder.authenticationProvider(postProcess(clientRegistrationAuthenticationProvider));
+		builder.authenticationProvider(postProcess(oidcClientRegistrationAuthenticationProvider));
 
 		ExceptionHandlingConfigurer<B> exceptionHandling = builder.getConfigurer(ExceptionHandlingConfigurer.class);
 		if (exceptionHandling != null) {
@@ -246,9 +237,6 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 			builder.addFilterBefore(postProcess(authorizationServerMetadataEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
 		}
 
-		RegisteredClientRepository registeredClientRepository = getRegisteredClientRepository(builder);
-		OAuth2AuthorizationService authorizationService = getAuthorizationService(builder);
-
 		JWKSource<SecurityContext> jwkSource = getJwkSource(builder);
 		NimbusJwkSetEndpointFilter jwkSetEndpointFilter = new NimbusJwkSetEndpointFilter(
 				jwkSource,
@@ -268,8 +256,8 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 
 		OAuth2AuthorizationEndpointFilter authorizationEndpointFilter =
 				new OAuth2AuthorizationEndpointFilter(
-						registeredClientRepository,
-						authorizationService,
+						getRegisteredClientRepository(builder),
+						getAuthorizationService(builder),
 						providerSettings.authorizationEndpoint());
 		builder.addFilterBefore(postProcess(authorizationEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
 
@@ -291,14 +279,12 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 						providerSettings.tokenRevocationEndpoint());
 		builder.addFilterAfter(postProcess(tokenRevocationEndpointFilter), OAuth2TokenIntrospectionEndpointFilter.class);
 
-		if (providerSettings.isOidClientRegistrationEndpointEnabled()) {
-			OidcClientRegistrationEndpointFilter oidcClientRegistrationEndpointFilter =
-					new OidcClientRegistrationEndpointFilter(
-							registeredClientRepository,
-							authenticationManager,
-							providerSettings.oidcClientRegistrationEndpoint());
-			builder.addFilterAfter(postProcess(oidcClientRegistrationEndpointFilter), OAuth2TokenRevocationEndpointFilter.class);
-		}
+		// TODO Make OpenID Client Registration an "opt-in" feature
+		OidcClientRegistrationEndpointFilter oidcClientRegistrationEndpointFilter =
+				new OidcClientRegistrationEndpointFilter(
+						authenticationManager,
+						providerSettings.oidcClientRegistrationEndpoint());
+		builder.addFilterAfter(postProcess(oidcClientRegistrationEndpointFilter), OAuth2TokenRevocationEndpointFilter.class);
 	}
 
 	private void initEndpointMatchers(ProviderSettings providerSettings) {
@@ -322,8 +308,7 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 		this.authorizationServerMetadataEndpointMatcher = new AntPathRequestMatcher(
 				OAuth2AuthorizationServerMetadataEndpointFilter.DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI, HttpMethod.GET.name());
 		this.oidcClientRegistrationEndpointMatcher = new AntPathRequestMatcher(
-				providerSettings.oidcClientRegistrationEndpoint(),
-				HttpMethod.POST.name());
+				providerSettings.oidcClientRegistrationEndpoint(), HttpMethod.POST.name());
 	}
 
 	private static void validateProviderSettings(ProviderSettings providerSettings) {

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcClientMetadataClaimAccessor.java

@@ -15,17 +15,18 @@
  */
 package org.springframework.security.oauth2.core.oidc;
 
-import org.springframework.security.oauth2.core.ClaimAccessor;
-import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
-
 import java.time.Instant;
 import java.util.List;
 
+import org.springframework.security.oauth2.core.ClaimAccessor;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+
 /**
- * A {@link ClaimAccessor} for the "claims" that can be returned
- * in the OpenID Client Registration Response.
+ * A {@link ClaimAccessor} for the "claims" that are contained
+ * in the OpenID Client Registration Request and Response.
  *
  * @author Ovidiu Popa
+ * @author Joe Grandja
  * @since 0.1.1
  * @see ClaimAccessor
  * @see OidcClientMetadataClaimNames
@@ -35,96 +36,102 @@ import java.util.List;
 public interface OidcClientMetadataClaimAccessor extends ClaimAccessor {
 
 	/**
-	 * Returns the redirect URI(s) that the client may use in redirect-based flows.
+	 * Returns the Client Identifier {@code (client_id)}.
 	 *
-	 * @return the {@code List} of redirect URI(s)
-	 */
-	default List<String> getRedirectUris() {
-		return getClaimAsStringList(OidcClientMetadataClaimNames.REDIRECT_URIS);
-	}
-
-	/**
-	 * Returns the OAuth 2.0 {@code response_type} values that the client may use.
-	 *
-	 * @return the {@code List} of {@code response_type}
-	 */
-	default List<String> getResponseTypes() {
-		return getClaimAsStringList(OidcClientMetadataClaimNames.RESPONSE_TYPES);
-	}
-
-	/**
-	 * Returns the authorization {@code grant_types} that the client may use.
-	 *
-	 * @return the {@code List} of authorization {@code grant_types}
-	 */
-	default List<String> getGrantTypes() {
-		return getClaimAsStringList(OidcClientMetadataClaimNames.GRANT_TYPES);
-	}
-
-	/**
-	 * Returns the {@code client_name}.
-	 *
-	 * @return the {@code client_name}
-	 */
-	default String getClientName() {
-		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_NAME);
-	}
-
-	/**
-	 * Returns the scope(s) that the client may use.
-	 *
-	 * @return the scope(s)
-	 */
-	default String getScope() {
-		return getClaimAsString(OidcClientMetadataClaimNames.SCOPE);
-	}
-
-	/**
-	 * Returns the {@link ClientAuthenticationMethod authentication method} that the client may use.
-	 *
-	 * @return the {@link ClientAuthenticationMethod authentication method}
-	 */
-	default String getTokenEndpointAuthenticationMethod() {
-		return getClaimAsString(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD);
-	}
-
-	/**
-	 * Returns the {@code client_id}.
-	 *
-	 * @return the {@code client_id}
+	 * @return the Client Identifier
 	 */
 	default String getClientId() {
 		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_ID);
 	}
 
 	/**
-	 * Returns the {@code client_id_issued_at} timestamp.
+	 * Returns the time at which the Client Identifier was issued {@code (client_id_issued_at)}.
 	 *
-	 * @return the {@code client_id_issued_at} timestamp
+	 * @return the time at which the Client Identifier was issued
 	 */
 	default Instant getClientIdIssuedAt() {
 		return getClaimAsInstant(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT);
 	}
 
 	/**
-	 * Returns the {@code client_secret}.
+	 * Returns the Client Secret {@code (client_secret)}.
 	 *
-	 * @return the {@code client_secret}
+	 * @return the Client Secret
 	 */
 	default String getClientSecret() {
 		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_SECRET);
 	}
 
 	/**
-	 * Returns the {@code client_secret_expires_at} timestamp.
+	 * Returns the time at which the {@code client_secret} will expire {@code (client_secret_expires_at)}.
 	 *
-	 * @return the {@code client_secret_expires_at} timestamp
+	 * @return the time at which the {@code client_secret} will expire
 	 */
 	default Instant getClientSecretExpiresAt() {
 		return getClaimAsInstant(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT);
 	}
 
+	/**
+	 * Returns the name of the Client to be presented to the End-User {@code (client_name)}.
+	 *
+	 * @return the name of the Client to be presented to the End-User
+	 */
+	default String getClientName() {
+		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_NAME);
+	}
 
+	/**
+	 * Returns the redirection {@code URI} values used by the Client {@code (redirect_uris)}.
+	 *
+	 * @return the redirection {@code URI} values used by the Client
+	 */
+	default List<String> getRedirectUris() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.REDIRECT_URIS);
+	}
 
+	/**
+	 * Returns the authentication method used by the Client for the Token Endpoint {@code (token_endpoint_auth_method)}.
+	 *
+	 * @return the authentication method used by the Client for the Token Endpoint
+	 */
+	default String getTokenEndpointAuthenticationMethod() {
+		return getClaimAsString(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using {@code (grant_types)}.
+	 *
+	 * @return the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using
+	 */
+	default List<String> getGrantTypes() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.GRANT_TYPES);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using {@code (response_types)}.
+	 *
+	 * @return the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using
+	 */
+	default List<String> getResponseTypes() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.RESPONSE_TYPES);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code scope} values that the Client will restrict itself to using {@code (scope)}.
+	 *
+	 * @return the OAuth 2.0 {@code scope} values that the Client will restrict itself to using
+	 */
+	default List<String> getScopes() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.SCOPE);
+	}
+
+	/**
+	 * Returns the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client {@code (id_token_signed_response_alg)}.
+	 *
+	 * @return the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client
+	 */
+	default String getIdTokenSignedResponseAlgorithm() {
+		return getClaimAsString(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG);
+	}
 
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcClientMetadataClaimNames.java

@@ -15,65 +15,72 @@
  */
 package org.springframework.security.oauth2.core.oidc;
 
+import org.springframework.security.oauth2.jose.jws.JwsAlgorithm;
+
 /**
- * The names of the "claims" defined by OpenID Client Registration 1.0 that can be returned
- * in the OpenID Client Registration Response.
+ * The names of the "claims" defined by OpenID Connect Dynamic Client Registration 1.0
+ * that are contained in the OpenID Client Registration Request and Response.
  *
  * @author Ovidiu Popa
+ * @author Joe Grandja
  * @since 0.1.1
  * @see <a target="_blank" href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientMetadata">2. Client Metadata</a>
  */
 public interface OidcClientMetadataClaimNames {
 
-	//request
 	/**
-	 * {@code redirect_uris} - the redirect URI(s) that the client may use in redirect-based flows
-	 */
-	String REDIRECT_URIS = "redirect_uris";
-
-	/**
-	 * {@code response_types} - the OAuth 2.0 {@code response_type} values that the client may use
-	 */
-	String RESPONSE_TYPES = "response_types";
-
-	/**
-	 * {@code grant_types} - the OAuth 2.0 authorization {@code grant_types} that the client may use
-	 */
-	String GRANT_TYPES = "grant_types";
-
-	/**
-	 * {@code client_name} - the {@code client_name}
-	 */
-	String CLIENT_NAME = "client_name";
-
-	/**
-	 * {@code scope} - the scope(s) that the client may use
-	 */
-	String SCOPE = "scope";
-
-	/**
-	 * {@code token_endpoint_auth_method} - the {@link org.springframework.security.oauth2.core.ClientAuthenticationMethod authentication method} that the client may use.
-	 */
-	String TOKEN_ENDPOINT_AUTH_METHOD = "token_endpoint_auth_method";
-
-	//response
-	/**
-	 * {@code client_id} - the {@code client_id}
+	 * {@code client_id} - the Client Identifier
 	 */
 	String CLIENT_ID = "client_id";
 
 	/**
-	 * {@code client_secret} - the {@code client_secret}
-	 */
-	String CLIENT_SECRET = "client_secret";
-
-	/**
-	 * {@code client_id_issued_at} - the timestamp when the client id was issued
+	 * {@code client_id_issued_at} - the time at which the Client Identifier was issued
 	 */
 	String CLIENT_ID_ISSUED_AT = "client_id_issued_at";
 
 	/**
-	 * {@code client_secret_expires_at} - the timestamp when the client secret expires
+	 * {@code client_secret} - the Client Secret
+	 */
+	String CLIENT_SECRET = "client_secret";
+
+	/**
+	 * {@code client_secret_expires_at} - the time at which the {@code client_secret} will expire or 0 if it will not expire
 	 */
 	String CLIENT_SECRET_EXPIRES_AT = "client_secret_expires_at";
+
+	/**
+	 * {@code client_name} - the name of the Client to be presented to the End-User
+	 */
+	String CLIENT_NAME = "client_name";
+
+	/**
+	 * {@code redirect_uris} - the redirection {@code URI} values used by the Client
+	 */
+	String REDIRECT_URIS = "redirect_uris";
+
+	/**
+	 * {@code token_endpoint_auth_method} - the authentication method used by the Client for the Token Endpoint
+	 */
+	String TOKEN_ENDPOINT_AUTH_METHOD = "token_endpoint_auth_method";
+
+	/**
+	 * {@code grant_types} - the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using
+	 */
+	String GRANT_TYPES = "grant_types";
+
+	/**
+	 * {@code response_types} - the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using
+	 */
+	String RESPONSE_TYPES = "response_types";
+
+	/**
+	 * {@code scope} - a space-separated list of OAuth 2.0 {@code scope} values that the Client will restrict itself to using
+	 */
+	String SCOPE = "scope";
+
+	/**
+	 * {@code id_token_signed_response_alg} - the {@link JwsAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client
+	 */
+	String ID_TOKEN_SIGNED_RESPONSE_ALG = "id_token_signed_response_alg";
+
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcClientRegistration.java

@@ -15,12 +15,6 @@
  */
 package org.springframework.security.oauth2.core.oidc;
 
-import org.springframework.security.oauth2.core.AuthorizationGrantType;
-import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
-import org.springframework.security.oauth2.core.Version;
-import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
-import org.springframework.util.Assert;
-
 import java.io.Serializable;
 import java.net.URI;
 import java.net.URL;
@@ -32,28 +26,36 @@ import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
 
+import org.springframework.security.oauth2.core.Version;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+import org.springframework.util.Assert;
+
 /**
  * A representation of an OpenID Client Registration Request and Response,
- * which contains a set of claims defined by the
- * OpenID Connect Registration 1.0 specification.
+ * which is sent to and returned from the Client Registration Endpoint,
+ * and contains a set of claims about the Client's Registration information.
+ * The claims are defined by the OpenID Connect Dynamic Client Registration 1.0 specification.
  *
  * @author Ovidiu Popa
+ * @author Joe Grandja
  * @since 0.1.1
  * @see OidcClientMetadataClaimAccessor
- * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientRegistration">3.1.  Client Registration Request</a>
+ * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#RegistrationRequest">3.1. Client Registration Request</a>
+ * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#RegistrationResponse">3.2. Client Registration Response</a>
  */
 public final class OidcClientRegistration implements OidcClientMetadataClaimAccessor, Serializable {
 	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
 	private final Map<String, Object> claims;
 
 	private OidcClientRegistration(Map<String, Object> claims) {
-		this.claims = Collections.unmodifiableMap(claims);
+		Assert.notEmpty(claims, "claims cannot be empty");
+		this.claims = Collections.unmodifiableMap(new LinkedHashMap<>(claims));
 	}
 
 	/**
-	 * Returns the OpenID Client Registration metadata.
+	 * Returns the metadata as claims.
 	 *
-	 * @return a {@code Map} of the metadata values
+	 * @return a {@code Map} of the metadata as claims
 	 */
 	@Override
 	public Map<String, Object> getClaims() {
@@ -61,9 +63,9 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 	}
 
 	/**
-	 * Constructs a new {@link OidcClientRegistration.Builder} with empty claims.
+	 * Constructs a new {@link Builder} with empty claims.
 	 *
-	 * @return the {@link OidcClientRegistration.Builder}
+	 * @return the {@link Builder}
 	 */
 	public static Builder builder() {
 		return new Builder();
@@ -80,18 +82,69 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 				.claims(c -> c.putAll(claims));
 	}
 
+	/**
+	 * Helps configure an {@link OidcClientRegistration}.
+	 */
 	public static class Builder {
-
 		private final Map<String, Object> claims = new LinkedHashMap<>();
 
 		private Builder() {
 		}
 
 		/**
-		 * Add this Redirect URI to the collection of {@code redirect_uris} in the resulting
-		 * {@link OidcClientRegistration}, REQUIRED.
+		 * Sets the Client Identifier, REQUIRED.
 		 *
-		 * @param redirectUri the OAuth 2.0 {@code redirect_uri} value that client supports
+		 * @param clientId the Client Identifier
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientId(String clientId) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_ID, clientId);
+		}
+
+		/**
+		 * Sets the time at which the Client Identifier was issued, OPTIONAL.
+		 *
+		 * @param clientIdIssuedAt the time at which the Client Identifier was issued
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientIdIssuedAt(Instant clientIdIssuedAt) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, clientIdIssuedAt);
+		}
+
+		/**
+		 * Sets the Client Secret, OPTIONAL.
+		 *
+		 * @param clientSecret the Client Secret
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientSecret(String clientSecret) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_SECRET, clientSecret);
+		}
+
+		/**
+		 * Sets the time at which the {@code client_secret} will expire or {@code null} if it will not expire, REQUIRED if {@code client_secret} was issued.
+		 *
+		 * @param clientSecretExpiresAt the time at which the {@code client_secret} will expire or {@code null} if it will not expire
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientSecretExpiresAt(Instant clientSecretExpiresAt) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, clientSecretExpiresAt);
+		}
+
+		/**
+		 * Sets the name of the Client to be presented to the End-User, OPTIONAL.
+		 *
+		 * @param clientName the name of the Client to be presented to the End-User
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientName(String clientName) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_NAME, clientName);
+		}
+
+		/**
+		 * Add the redirection {@code URI} used by the Client, REQUIRED.
+		 *
+		 * @param redirectUri the redirection {@code URI} used by the Client
 		 * @return the {@link Builder} for further configuration
 		 */
 		public Builder redirectUri(String redirectUri) {
@@ -100,100 +153,31 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 		}
 
 		/**
-		 * A {@code Consumer} of the Redirect URI(s) allowing the ability to add, replace, or remove.
+		 * A {@code Consumer} of the redirection {@code URI} values used by the Client,
+		 * allowing the ability to add, replace, or remove, REQUIRED.
 		 *
-		 * @param redirectUriConsumer a {@code Consumer} of the Redirect URI(s)
+		 * @param redirectUrisConsumer a {@code Consumer} of the redirection {@code URI} values used by the Client
 		 * @return the {@link Builder} for further configuration
 		 */
-		public Builder redirectUris(Consumer<List<String>> redirectUriConsumer) {
-			acceptClaimValues(OidcClientMetadataClaimNames.REDIRECT_URIS, redirectUriConsumer);
+		public Builder redirectUris(Consumer<List<String>> redirectUrisConsumer) {
+			acceptClaimValues(OidcClientMetadataClaimNames.REDIRECT_URIS, redirectUrisConsumer);
 			return this;
 		}
 
 		/**
-		 * Add this Response Type to the collection of {@code response_types} in the resulting
-		 * {@link OidcClientRegistration}, OPTIONAL.
+		 * Sets the authentication method used by the Client for the Token Endpoint, OPTIONAL.
 		 *
-		 * @param responseType the OAuth 2.0 {@code response_type} value that client supports
+		 * @param tokenEndpointAuthenticationMethod the authentication method used by the Client for the Token Endpoint
 		 * @return the {@link Builder} for further configuration
 		 */
-		public Builder responseType(String responseType) {
-			addClaimToClaimList(OidcClientMetadataClaimNames.RESPONSE_TYPES, responseType);
-			return this;
+		public Builder tokenEndpointAuthenticationMethod(String tokenEndpointAuthenticationMethod) {
+			return claim(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, tokenEndpointAuthenticationMethod);
 		}
 
 		/**
-		 * Add {@code Consumer}  of {@code response_types} allowing the ability to add, replace, or remove
-		 * {@link OidcClientRegistration}, OPTIONAL.
+		 * Add the OAuth 2.0 {@code grant_type} that the Client will restrict itself to using, OPTIONAL.
 		 *
-		 * @param responseType the OAuth 2.0 {@code response_type} value that client supports
-		 * @return the {@link Builder} for further configuration
-		 */
-		public Builder responseTypes(Consumer<List<String>>  responseType) {
-			acceptClaimValues(OidcClientMetadataClaimNames.RESPONSE_TYPES, responseType);
-			return this;
-		}
-
-		/**
-		 * Sets {@code client_name} claim in the resulting
-		 * {@link OidcClientRegistration}, OPTIONAL.
-		 *
-		 * @param clientName the OAuth 2.0 {@code client_name} of the registered client
-		 * @return the {@link Builder} for further configuration
-		 */
-		public Builder clientName(String clientName) {
-			return claim(OidcClientMetadataClaimNames.CLIENT_NAME, clientName);
-		}
-
-		/**
-		 * Sets {@code client_id} claim in the resulting
-		 * {@link OidcClientRegistration}.
-		 *
-		 * @param clientId the OAuth 2.0 {@code client_id} of the registered client
-		 * @return the {@link Builder} for further configuration
-		 */
-		public Builder clientId(String clientId) {
-			return claim(OidcClientMetadataClaimNames.CLIENT_ID, clientId);
-		}
-
-		/**
-		 * Sets {@code client_id_issued_at} claim in the resulting
-		 * {@link OidcClientRegistration}.
-		 *
-		 * @param clientIssuedAt the timestamp {@code client_id_issued_at} when the client was issued
-		 * @return the {@link Builder} for further configuration
-		 */
-		public Builder clientIdIssuedAt(Instant clientIssuedAt) {
-			return claim(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, clientIssuedAt);
-		}
-
-		/**
-		 * Sets {@code client_secret} claim in the resulting
-		 * {@link OidcClientRegistration}.
-		 *
-		 * @param clientSecret the {@code client_secret} of the registered client
-		 * @return the {@link Builder} for further configuration
-		 */
-		public Builder clientSecret(String clientSecret) {
-			return claim(OidcClientMetadataClaimNames.CLIENT_SECRET, clientSecret);
-		}
-
-		/**
-		 * Sets {@code client_secret_expires_at} claim in the resulting
-		 * {@link OidcClientRegistration}.
-		 *
-		 * @param clientSecretExpiresAt the timestamp {@code client_secret_expires_at} when the client_secret expires
-		 * @return the {@link Builder} for further configuration
-		 */
-		public Builder clientSecretExpiresAt(Instant clientSecretExpiresAt) {
-			return claim(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, clientSecretExpiresAt);
-		}
-
-		/**
-		 * Add this Grant Type to the collection of {@code grant_types_supported} in the resulting
-		 * {@link OidcClientRegistration}, OPTIONAL.
-		 *
-		 * @param grantType the OAuth 2.0 {@code grant_type} value that client supports
+		 * @param grantType the OAuth 2.0 {@code grant_type} that the Client will restrict itself to using
 		 * @return the {@link Builder} for further configuration
 		 */
 		public Builder grantType(String grantType) {
@@ -202,9 +186,10 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 		}
 
 		/**
-		 * A {@code Consumer} of the Grant Type(s) allowing the ability to add, replace, or remove.
+		 * A {@code Consumer} of the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
 		 *
-		 * @param grantTypesConsumer a {@code Consumer} of the Grant Type(s)
+		 * @param grantTypesConsumer a {@code Consumer} of the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using
 		 * @return the {@link Builder} for further configuration
 		 */
 		public Builder grantTypes(Consumer<List<String>> grantTypesConsumer) {
@@ -213,22 +198,44 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 		}
 
 		/**
-		 * Add this Scope to the collection of {@code scopes_supported} in the resulting
-		 * {@link OidcClientRegistration}, RECOMMENDED.
+		 * Add the OAuth 2.0 {@code response_type} that the Client will restrict itself to using, OPTIONAL.
 		 *
-		 * @param scope the OAuth 2.0 {@code scope} value that client supports
+		 * @param responseType the OAuth 2.0 {@code response_type} that the Client will restrict itself to using
 		 * @return the {@link Builder} for further configuration
 		 */
-		public Builder scope(String scope) {
-			claim(OidcClientMetadataClaimNames.SCOPE, scope);
+		public Builder responseType(String responseType) {
+			addClaimToClaimList(OidcClientMetadataClaimNames.RESPONSE_TYPES, responseType);
 			return this;
 		}
 
 		/**
-		 * Add {@code Consumer}  of {@code scopes} allowing the ability to add, replace, or remove
-		 * {@link OidcClientRegistration}, RECOMMENDED.
+		 * A {@code Consumer} of the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
 		 *
-		 * @param scopesConsumer the OAuth 2.0 {@code scope} value that client supports
+		 * @param responseTypesConsumer a {@code Consumer} of the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder responseTypes(Consumer<List<String>>  responseTypesConsumer) {
+			acceptClaimValues(OidcClientMetadataClaimNames.RESPONSE_TYPES, responseTypesConsumer);
+			return this;
+		}
+
+		/**
+		 * Add the OAuth 2.0 {@code scope} that the Client will restrict itself to using, OPTIONAL.
+		 *
+		 * @param scope the OAuth 2.0 {@code scope} that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder scope(String scope) {
+			addClaimToClaimList(OidcClientMetadataClaimNames.SCOPE, scope);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code scope} values that the Client will restrict itself to using,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
+		 *
+		 * @param scopesConsumer a {@code Consumer} of the OAuth 2.0 {@code scope} values that the Client will restrict itself to using
 		 * @return the {@link Builder} for further configuration
 		 */
 		public Builder scopes(Consumer<List<String>>  scopesConsumer) {
@@ -237,19 +244,17 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 		}
 
 		/**
-		 * Add this Token endpoint authentication method to the collection of {@code token_endpoint_auth_method} in the resulting
-		 * {@link OidcClientRegistration}, OPTIONAL.
+		 * Sets the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client, OPTIONAL.
 		 *
-		 * @param tokenEndpointAuthenticationMethod the OAuth 2.0 {@code token_endpoint_auth_method} value that client supports
+		 * @param idTokenSignedResponseAlgorithm the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client
 		 * @return the {@link Builder} for further configuration
 		 */
-		public Builder tokenEndpointAuthenticationMethod(String tokenEndpointAuthenticationMethod) {
-			claim(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, tokenEndpointAuthenticationMethod);
-			return this;
+		public Builder idTokenSignedResponseAlgorithm(String idTokenSignedResponseAlgorithm) {
+			return claim(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG, idTokenSignedResponseAlgorithm);
 		}
 
 		/**
-		 * Add this claim in the resulting {@link OidcClientRegistration}.
+		 * Sets the claim.
 		 *
 		 * @param name  the claim name
 		 * @param value the claim value
@@ -263,8 +268,8 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 		}
 
 		/**
-		 * Provides access to every {@link #claim(String, Object)} declared so far with
-		 * the possibility to add, replace, or remove.
+		 * Provides access to every {@link #claim(String, Object)} declared so far
+		 * allowing the ability to add, replace, or remove.
 		 *
 		 * @param claimsConsumer a {@code Consumer} of the claims
 		 * @return the {@link Builder} for further configurations
@@ -274,58 +279,48 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 			return this;
 		}
 
+		/**
+		 * Validate the claims and build the {@link OidcClientRegistration}.
+		 * <p>
+		 * The following claims are REQUIRED:
+		 * {@code client_id}, {@code redirect_uris}.
+		 *
+		 * @return the {@link OidcClientRegistration}
+		 */
 		public OidcClientRegistration build() {
-			this.claims.computeIfAbsent(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD,
-					k -> ClientAuthenticationMethod.BASIC.getValue());
-			// If omitted, the default is that the Client will use only the authorization_code Grant Type.
-			this.claims.computeIfAbsent(OidcClientMetadataClaimNames.GRANT_TYPES,
-					k -> Collections.singletonList(AuthorizationGrantType.AUTHORIZATION_CODE.getValue()));
-			//If omitted, the default is that the Client will use only the code Response Type.
-			this.claims.computeIfAbsent(OidcClientMetadataClaimNames.RESPONSE_TYPES,
-					k -> Collections.singletonList(OAuth2AuthorizationResponseType.CODE.getValue()));
-			validateRedirectUris();
-			validateReponseTypesClaim();
-			validateGrantTypesClaim();
+			validate();
 			return new OidcClientRegistration(this.claims);
 		}
 
-		private void validateRedirectUris() {
-			// redirect_uris is required
+		private void validate() {
+			if (this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT) != null ||
+					this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET) != null) {
+				Assert.notNull(this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID), "client_id cannot be null");
+			}
+			if (this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT) != null) {
+				Assert.isInstanceOf(Instant.class, this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT), "client_id_issued_at must be of type Instant");
+			}
+			if (this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT) != null) {
+				Assert.notNull(this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET), "client_secret cannot be null");
+				Assert.isInstanceOf(Instant.class, this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT), "client_secret_expires_at must be of type Instant");
+			}
 			Assert.notNull(this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris cannot be null");
-			Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris must be of type list");
-			Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris must not be empty");
+			Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris must be of type List");
+			Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris cannot be empty");
 			((List<?>) this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS)).forEach(
 					url -> validateURL(url, "redirect_uri must be a valid URL")
 			);
-		}
-
-		private void validateGrantTypesClaim() {
-			Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES), "grant_types must be of type List");
-			List<?> grantTypes = (List<?>) this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES);
-			// If empty, the default is that the Client will use only the authorization_code Grant Type.
-			if (grantTypes.isEmpty()) {
-				this.claims.put(OidcClientMetadataClaimNames.GRANT_TYPES,
-						Collections.singletonList(AuthorizationGrantType.AUTHORIZATION_CODE.getValue()));
+			if (this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES) != null) {
+				Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES), "grant_types must be of type List");
+				Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES), "grant_types cannot be empty");
 			}
-		}
-
-		private void validateReponseTypesClaim() {
-			Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES), "response_types must be of type List");
-			List<?> responseTypes = (List<?>) this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES);
-			//If empty, the default is that the Client will use only the code Response Type.
-			if (responseTypes.isEmpty()) {
-				this.claims.put(OidcClientMetadataClaimNames.RESPONSE_TYPES, Collections.singletonList(OAuth2AuthorizationResponseType.CODE.getValue()));
+			if (this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES) != null) {
+				Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES), "response_types must be of type List");
+				Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES), "response_types cannot be empty");
 			}
-		}
-
-		private static void validateURL(Object url, String errorMessage) {
-			if (URL.class.isAssignableFrom(url.getClass())) {
-				return;
-			}
-			try {
-				new URI(url.toString()).toURL();
-			} catch (Exception ex) {
-				throw new IllegalArgumentException(errorMessage, ex);
+			if (this.claims.get(OidcClientMetadataClaimNames.SCOPE) != null) {
+				Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.SCOPE), "scope must be of type List");
+				Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.SCOPE), "scope cannot be empty");
 			}
 		}
 
@@ -345,5 +340,16 @@ public final class OidcClientRegistration implements OidcClientMetadataClaimAcce
 			List<String> values = (List<String>) this.claims.get(name);
 			valuesConsumer.accept(values);
 		}
+
+		private static void validateURL(Object url, String errorMessage) {
+			if (URL.class.isAssignableFrom(url.getClass())) {
+				return;
+			}
+			try {
+				new URI(url.toString()).toURL();
+			} catch (Exception ex) {
+				throw new IllegalArgumentException(errorMessage, ex);
+			}
+		}
 	}
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/http/converter/OidcClientRegistrationHttpMessageConverter.java

@@ -15,6 +15,15 @@
  */
 package org.springframework.security.oauth2.core.oidc.http.converter;
 
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.core.convert.converter.Converter;
@@ -31,31 +40,28 @@ import org.springframework.security.oauth2.core.converter.ClaimTypeConverter;
 import org.springframework.security.oauth2.core.oidc.OidcClientMetadataClaimNames;
 import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
 import org.springframework.util.Assert;
-
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
 
 /**
- * A {@link HttpMessageConverter} for an {@link OidcClientRegistration OpenID Client Registration Response}.
+ * A {@link HttpMessageConverter} for an {@link OidcClientRegistration OpenID Client Registration Request and Response}.
  *
  * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
  * @see AbstractHttpMessageConverter
  * @see OidcClientRegistration
- * @since 0.1.1
  */
 public class OidcClientRegistrationHttpMessageConverter extends AbstractHttpMessageConverter<OidcClientRegistration> {
 
-	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP =
-			new ParameterizedTypeReference<Map<String, Object>>() {
-			};
+	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP = new ParameterizedTypeReference<Map<String, Object>>() {
+	};
 
-	private Converter<Map<String, Object>, OidcClientRegistration> clientRegistrationConverter =
-			new OidcClientRegistrationConverter();
-
-	private Converter<OidcClientRegistration, Map<String, Object>> clientRegistrationParametersConverter = OidcClientRegistration::getClaims;
 	private final GenericHttpMessageConverter<Object> jsonMessageConverter = HttpMessageConverters.getJsonMessageConverter();
 
+	private Converter<Map<String, Object>, OidcClientRegistration> clientRegistrationConverter = new MapOidcClientRegistrationConverter();
+	private Converter<OidcClientRegistration, Map<String, Object>> clientRegistrationParametersConverter = new OidcClientRegistrationMapConverter();
+
 	public OidcClientRegistrationHttpMessageConverter() {
 		super(MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
 	}
@@ -70,52 +76,46 @@ public class OidcClientRegistrationHttpMessageConverter extends AbstractHttpMess
 	protected OidcClientRegistration readInternal(Class<? extends OidcClientRegistration> clazz, HttpInputMessage inputMessage)
 			throws HttpMessageNotReadableException {
 		try {
-			Map<String, Object> clientRegistrationParameters =
-					(Map<String, Object>) this.jsonMessageConverter.read(STRING_OBJECT_MAP.getType(), null, inputMessage);
+			Map<String, Object> clientRegistrationParameters = (Map<String, Object>) this.jsonMessageConverter
+					.read(STRING_OBJECT_MAP.getType(), null, inputMessage);
 			return this.clientRegistrationConverter.convert(clientRegistrationParameters);
 		} catch (Exception ex) {
 			throw new HttpMessageNotReadableException(
-					"An error occurred reading the OpenID Client Registration Request: " + ex.getMessage(), ex, inputMessage);
+					"An error occurred reading the OpenID Client Registration: " + ex.getMessage(), ex, inputMessage);
 		}
 	}
 
 	@Override
-	protected void writeInternal(OidcClientRegistration oidcClientRegistration, HttpOutputMessage outputMessage)
+	protected void writeInternal(OidcClientRegistration clientRegistration, HttpOutputMessage outputMessage)
 			throws HttpMessageNotWritableException {
-
 		try {
-			Map<String, Object> claims = clientRegistrationParametersConverter.convert(oidcClientRegistration);
-			this.jsonMessageConverter.write(
-					claims,
-					STRING_OBJECT_MAP.getType(),
-					MediaType.APPLICATION_JSON,
-					outputMessage
-			);
+			Map<String, Object> clientRegistrationParameters = this.clientRegistrationParametersConverter
+					.convert(clientRegistration);
+			this.jsonMessageConverter.write(clientRegistrationParameters, STRING_OBJECT_MAP.getType(),
+					MediaType.APPLICATION_JSON, outputMessage);
 		} catch (Exception ex) {
 			throw new HttpMessageNotWritableException(
-					"An error occurred writing the OpenID Client Registration response: " + ex.getMessage(), ex);
+					"An error occurred writing the OpenID Client Registration: " + ex.getMessage(), ex);
 		}
-
 	}
 
 	/**
-	 * Sets the {@link Converter} used for converting the OpenID Client Registration parameters
-	 * to an {@link OidcClientRegistration}.
+	 * Sets the {@link Converter} used for converting the OpenID Client Registration parameters to an {@link OidcClientRegistration}.
 	 *
-	 * @param clientRegistrationConverter the {@link Converter} used for converting to an
-	 *                                        {@link OidcClientRegistration}
+	 * @param clientRegistrationConverter the {@link Converter} used for converting to an {@link OidcClientRegistration}
 	 */
-	public void setClientRegistrationConverter(Converter<Map<String, Object>, OidcClientRegistration> clientRegistrationConverter) {
+	public final void setClientRegistrationConverter(
+			Converter<Map<String, Object>, OidcClientRegistration> clientRegistrationConverter) {
 		Assert.notNull(clientRegistrationConverter, "clientRegistrationConverter cannot be null");
 		this.clientRegistrationConverter = clientRegistrationConverter;
 	}
 
 	/**
-	 * Sets the {@link Converter} used for converting the {@link OidcClientRegistration} to a
-	 * {@code Map} representation of the OpenID Client Registration Response.
+	 * Sets the {@link Converter} used for converting the {@link OidcClientRegistration}
+	 * to a {@code Map} representation of the OpenID Client Registration parameters.
 	 *
 	 * @param clientRegistrationParametersConverter the {@link Converter} used for converting to a
-	 *                                         {@code Map} representation of the OpenID Client Registration Response
+	 * {@code Map} representation of the OpenID Client Registration parameters
 	 */
 	public final void setClientRegistrationParametersConverter(
 			Converter<OidcClientRegistration, Map<String, Object>> clientRegistrationParametersConverter) {
@@ -123,35 +123,87 @@ public class OidcClientRegistrationHttpMessageConverter extends AbstractHttpMess
 		this.clientRegistrationParametersConverter = clientRegistrationParametersConverter;
 	}
 
-	private static final class OidcClientRegistrationConverter implements Converter<Map<String, Object>, OidcClientRegistration> {
+	private static final class MapOidcClientRegistrationConverter
+			implements Converter<Map<String, Object>, OidcClientRegistration> {
+
 		private static final ClaimConversionService CLAIM_CONVERSION_SERVICE = ClaimConversionService.getSharedInstance();
 		private static final TypeDescriptor OBJECT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Object.class);
 		private static final TypeDescriptor STRING_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(String.class);
+		private static final TypeDescriptor INSTANT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Instant.class);
+		private static final Converter<Object, ?> INSTANT_CONVERTER = getConverter(INSTANT_TYPE_DESCRIPTOR);
 		private final ClaimTypeConverter claimTypeConverter;
 
-		private OidcClientRegistrationConverter() {
+		private MapOidcClientRegistrationConverter() {
+			Converter<Object, ?> stringConverter = getConverter(STRING_TYPE_DESCRIPTOR);
 			Converter<Object, ?> collectionStringConverter = getConverter(
 					TypeDescriptor.collection(Collection.class, STRING_TYPE_DESCRIPTOR));
-			Converter<Object, ?> stringConverter = getConverter(STRING_TYPE_DESCRIPTOR);
 
 			Map<String, Converter<Object, ?>> claimConverters = new HashMap<>();
-			claimConverters.put(OidcClientMetadataClaimNames.REDIRECT_URIS, collectionStringConverter);
-			claimConverters.put(OidcClientMetadataClaimNames.RESPONSE_TYPES, collectionStringConverter);
-			claimConverters.put(OidcClientMetadataClaimNames.GRANT_TYPES, collectionStringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_ID, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, INSTANT_CONVERTER);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_SECRET, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, MapOidcClientRegistrationConverter::convertClientSecretExpiresAt);
 			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_NAME, stringConverter);
-			claimConverters.put(OidcClientMetadataClaimNames.SCOPE, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.REDIRECT_URIS, collectionStringConverter);
 			claimConverters.put(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.GRANT_TYPES, collectionStringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.RESPONSE_TYPES, collectionStringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.SCOPE, MapOidcClientRegistrationConverter::convertScope);
+			claimConverters.put(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG, stringConverter);
 			this.claimTypeConverter = new ClaimTypeConverter(claimConverters);
 		}
 
 		@Override
 		public OidcClientRegistration convert(Map<String, Object> source) {
 			Map<String, Object> parsedClaims = this.claimTypeConverter.convert(source);
+			Object clientSecretExpiresAt = parsedClaims.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT);
+			if (clientSecretExpiresAt instanceof Number && clientSecretExpiresAt.equals(0)) {
+				parsedClaims.remove(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT);
+			}
 			return OidcClientRegistration.withClaims(parsedClaims).build();
 		}
 
 		private static Converter<Object, ?> getConverter(TypeDescriptor targetDescriptor) {
 			return source -> CLAIM_CONVERSION_SERVICE.convert(source, OBJECT_TYPE_DESCRIPTOR, targetDescriptor);
 		}
+
+		private static Instant convertClientSecretExpiresAt(Object clientSecretExpiresAt) {
+			if (clientSecretExpiresAt != null && String.valueOf(clientSecretExpiresAt).equals("0")) {
+				// 0 indicates that client_secret_expires_at does not expire
+				return null;
+			}
+			return (Instant) INSTANT_CONVERTER.convert(clientSecretExpiresAt);
+		}
+
+		private static List<String> convertScope(Object scope) {
+			if (scope == null) {
+				return Collections.emptyList();
+			}
+			return Arrays.asList(StringUtils.delimitedListToStringArray(scope.toString(), " "));
+		}
 	}
+
+	private static final class OidcClientRegistrationMapConverter
+			implements Converter<OidcClientRegistration, Map<String, Object>> {
+
+		@Override
+		public Map<String, Object> convert(OidcClientRegistration source) {
+			Map<String, Object> responseClaims = new LinkedHashMap<>(source.getClaims());
+			if (source.getClientIdIssuedAt() != null) {
+				responseClaims.put(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, source.getClientIdIssuedAt().getEpochSecond());
+			}
+			if (source.getClientSecret() != null) {
+				long clientSecretExpiresAt = 0;
+				if (source.getClientSecretExpiresAt() != null) {
+					clientSecretExpiresAt = source.getClientSecretExpiresAt().getEpochSecond();
+				}
+				responseClaims.put(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, clientSecretExpiresAt);
+			}
+			if (!CollectionUtils.isEmpty(source.getScopes())) {
+				responseClaims.put(OidcClientMetadataClaimNames.SCOPE, StringUtils.collectionToDelimitedString(source.getScopes(), " "));
+			}
+			return responseClaims;
+		}
+	}
+
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/OidcClientRegistrationAuthenticationProvider.java

@@ -1,86 +0,0 @@
-/*
- * Copyright 2020-2021 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
- *
- *      https://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.security.oauth2.server.authorization.authentication;
-
-import org.springframework.security.authentication.AuthenticationProvider;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.AuthenticationException;
-import org.springframework.security.oauth2.core.OAuth2AccessToken;
-import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
-import org.springframework.security.oauth2.core.OAuth2Error;
-import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
-import org.springframework.security.oauth2.core.OAuth2TokenType;
-import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
-import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
-import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
-import org.springframework.util.Assert;
-
-/**
- * An {@link AuthenticationProvider} implementation for OpenID Client Registration Endpoint.
- *
- * @author Ovidiu Popa
- * @since 0.1.1
- * @see JwtAuthenticationToken
- * @see OAuth2AuthorizationService
- */
-public class OidcClientRegistrationAuthenticationProvider implements AuthenticationProvider {
-
-	private static final String CLIENT_CREATE_SCOPE = "client.create";
-	private final OAuth2AuthorizationService authorizationService;
-
-	/**
-	 * Constructs an {@code OidcClientRegistrationAuthenticationProvider} using the provided parameters.
-	 *
-	 * @param authorizationService the authorization service
-	 */
-	public OidcClientRegistrationAuthenticationProvider(OAuth2AuthorizationService authorizationService) {
-		Assert.notNull(authorizationService, "authorizationService cannot be null");
-		this.authorizationService = authorizationService;
-	}
-
-	@Override
-	public Authentication authenticate(Authentication authentication) throws AuthenticationException {
-		JwtAuthenticationToken jwtAuthenticationToken =
-				(JwtAuthenticationToken) authentication;
-
-		String tokenValue = jwtAuthenticationToken.getToken().getTokenValue();
-		OAuth2Authorization authorization = this.authorizationService.findByToken(tokenValue, OAuth2TokenType.ACCESS_TOKEN);
-
-		if (authorization == null) {
-			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_GRANT));
-		}
-
-		OAuth2Authorization.Token<OAuth2AccessToken> authorizationAccessToken =
-				authorization.getAccessToken();
-		if (authorizationAccessToken.isInvalidated()) {
-			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_GRANT));
-		}
-		OAuth2AccessToken accessToken = authorizationAccessToken.getToken();
-		if (!accessToken.getScopes().contains(CLIENT_CREATE_SCOPE)) {
-			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_GRANT));
-		}
-
-		authorization = OAuth2AuthenticationProviderUtils.invalidate(authorization, accessToken);
-		this.authorizationService.save(authorization);
-
-		return jwtAuthenticationToken;
-	}
-
-	@Override
-	public boolean supports(Class<?> authentication) {
-		return JwtAuthenticationToken.class.isAssignableFrom(authentication);
-	}
-}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/client/InMemoryRegisteredClientRepository.java

@@ -22,6 +22,7 @@ import java.util.concurrent.ConcurrentHashMap;
 
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
 
 /**
  * A {@link RegisteredClientRepository} that stores {@link RegisteredClient}(s) in-memory.
@@ -30,6 +31,8 @@ import org.springframework.util.Assert;
  * <b>NOTE:</b> This implementation is recommended ONLY to be used during development/testing.
  *
  * @author Anoop Garlapati
+ * @author Ovidiu Popa
+ * @author Joe Grandja
  * @see RegisteredClientRepository
  * @see RegisteredClient
  * @since 0.0.1
@@ -58,23 +61,22 @@ public final class InMemoryRegisteredClientRepository implements RegisteredClien
 		ConcurrentHashMap<String, RegisteredClient> clientIdRegistrationMapResult = new ConcurrentHashMap<>();
 		for (RegisteredClient registration : registrations) {
 			Assert.notNull(registration, "registration cannot be null");
-			String id = registration.getId();
-			if (idRegistrationMapResult.containsKey(id)) {
-				throw new IllegalArgumentException("Registered client must be unique. " +
-						"Found duplicate identifier: " + id);
-			}
-			String clientId = registration.getClientId();
-			if (clientIdRegistrationMapResult.containsKey(clientId)) {
-				throw new IllegalArgumentException("Registered client must be unique. " +
-						"Found duplicate client identifier: " + clientId);
-			}
-			idRegistrationMapResult.put(id, registration);
-			clientIdRegistrationMapResult.put(clientId, registration);
+			assertUniqueIdentifiers(registration, idRegistrationMapResult);
+			idRegistrationMapResult.put(registration.getId(), registration);
+			clientIdRegistrationMapResult.put(registration.getClientId(), registration);
 		}
 		this.idRegistrationMap = idRegistrationMapResult;
 		this.clientIdRegistrationMap = clientIdRegistrationMapResult;
 	}
 
+	@Override
+	public void save(RegisteredClient registeredClient) {
+		Assert.notNull(registeredClient, "registeredClient cannot be null");
+		assertUniqueIdentifiers(registeredClient, this.idRegistrationMap);
+		this.idRegistrationMap.put(registeredClient.getId(), registeredClient);
+		this.clientIdRegistrationMap.put(registeredClient.getClientId(), registeredClient);
+	}
+
 	@Nullable
 	@Override
 	public RegisteredClient findById(String id) {
@@ -89,20 +91,22 @@ public final class InMemoryRegisteredClientRepository implements RegisteredClien
 		return this.clientIdRegistrationMap.get(clientId);
 	}
 
-	@Override
-	public void saveClient(RegisteredClient registeredClient) {
-		Assert.notNull(registeredClient, "registeredClient cannot be null");
-		String id = registeredClient.getId();
-		if (idRegistrationMap.containsKey(id)) {
-			throw new IllegalArgumentException("Registered client must be unique. " +
-					"Found duplicate identifier: " + id);
-		}
-		String clientId = registeredClient.getClientId();
-		if (clientIdRegistrationMap.containsKey(clientId)) {
-			throw new IllegalArgumentException("Registered client must be unique. " +
-					"Found duplicate client identifier: " + clientId);
-		}
-		this.idRegistrationMap.put(registeredClient.getId(), registeredClient);
-		this.clientIdRegistrationMap.put(registeredClient.getClientId(), registeredClient);
+	private void assertUniqueIdentifiers(RegisteredClient registeredClient, Map<String, RegisteredClient> registrations) {
+		registrations.values().forEach(registration -> {
+			if (registeredClient.getId().equals(registration.getId())) {
+				throw new IllegalArgumentException("Registered client must be unique. " +
+						"Found duplicate identifier: " + registeredClient.getId());
+			}
+			if (registeredClient.getClientId().equals(registration.getClientId())) {
+				throw new IllegalArgumentException("Registered client must be unique. " +
+						"Found duplicate client identifier: " + registeredClient.getClientId());
+			}
+			if (StringUtils.hasText(registeredClient.getClientSecret()) &&
+					registeredClient.getClientSecret().equals(registration.getClientSecret())) {
+				throw new IllegalArgumentException("Registered client must be unique. " +
+						"Found duplicate client secret for identifier: " + registeredClient.getId());
+			}
+		});
 	}
+
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/client/RegisteredClient.java

@@ -18,12 +18,14 @@ package org.springframework.security.oauth2.server.authorization.client;
 import java.io.Serializable;
 import java.net.URI;
 import java.net.URISyntaxException;
+import java.time.Instant;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
 import java.util.function.Consumer;
 
+import org.springframework.lang.Nullable;
 import org.springframework.security.oauth2.core.AuthorizationGrantType;
 import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
 import org.springframework.security.oauth2.core.Version;
@@ -31,6 +33,7 @@ import org.springframework.security.oauth2.server.authorization.config.ClientSet
 import org.springframework.security.oauth2.server.authorization.config.TokenSettings;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
 
 /**
  * A representation of a client registration with an OAuth 2.0 Authorization Server.
@@ -44,7 +47,10 @@ public class RegisteredClient implements Serializable {
 	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
 	private String id;
 	private String clientId;
+	private Instant clientIdIssuedAt;
 	private String clientSecret;
+	private Instant clientSecretExpiresAt;
+	private String clientName;
 	private Set<ClientAuthenticationMethod> clientAuthenticationMethods;
 	private Set<AuthorizationGrantType> authorizationGrantTypes;
 	private Set<String> redirectUris;
@@ -73,6 +79,16 @@ public class RegisteredClient implements Serializable {
 		return this.clientId;
 	}
 
+	/**
+	 * Returns the time at which the client identifier was issued.
+	 *
+	 * @return the time at which the client identifier was issued
+	 */
+	@Nullable
+	public Instant getClientIdIssuedAt() {
+		return this.clientIdIssuedAt;
+	}
+
 	/**
 	 * Returns the client secret.
 	 *
@@ -82,6 +98,25 @@ public class RegisteredClient implements Serializable {
 		return this.clientSecret;
 	}
 
+	/**
+	 * Returns the time at which the client secret expires or {@code null} if it does not expire.
+	 *
+	 * @return the time at which the client secret expires or {@code null} if it does not expire
+	 */
+	@Nullable
+	public Instant getClientSecretExpiresAt() {
+		return this.clientSecretExpiresAt;
+	}
+
+	/**
+	 * Returns the client name.
+	 *
+	 * @return the client name
+	 */
+	public String getClientName() {
+		return this.clientName;
+	}
+
 	/**
 	 * Returns the {@link ClientAuthenticationMethod authentication method(s)} that the client may use.
 	 *
@@ -147,7 +182,10 @@ public class RegisteredClient implements Serializable {
 		RegisteredClient that = (RegisteredClient) obj;
 		return Objects.equals(this.id, that.id) &&
 				Objects.equals(this.clientId, that.clientId) &&
+				Objects.equals(this.clientIdIssuedAt, that.clientIdIssuedAt) &&
 				Objects.equals(this.clientSecret, that.clientSecret) &&
+				Objects.equals(this.clientSecretExpiresAt, that.clientSecretExpiresAt) &&
+				Objects.equals(this.clientName, that.clientName) &&
 				Objects.equals(this.clientAuthenticationMethods, that.clientAuthenticationMethods) &&
 				Objects.equals(this.authorizationGrantTypes, that.authorizationGrantTypes) &&
 				Objects.equals(this.redirectUris, that.redirectUris) &&
@@ -158,8 +196,8 @@ public class RegisteredClient implements Serializable {
 
 	@Override
 	public int hashCode() {
-		return Objects.hash(this.id, this.clientId, this.clientSecret,
-				this.clientAuthenticationMethods, this.authorizationGrantTypes, this.redirectUris,
+		return Objects.hash(this.id, this.clientId, this.clientIdIssuedAt, this.clientSecret, this.clientSecretExpiresAt,
+				this.clientName, this.clientAuthenticationMethods, this.authorizationGrantTypes, this.redirectUris,
 				this.scopes, this.clientSettings.settings(), this.tokenSettings.settings());
 	}
 
@@ -168,6 +206,7 @@ public class RegisteredClient implements Serializable {
 		return "RegisteredClient {" +
 				"id='" + this.id + '\'' +
 				", clientId='" + this.clientId + '\'' +
+				", clientName='" + this.clientName + '\'' +
 				", clientAuthenticationMethods=" + this.clientAuthenticationMethods +
 				", authorizationGrantTypes=" + this.authorizationGrantTypes +
 				", redirectUris=" + this.redirectUris +
@@ -206,7 +245,10 @@ public class RegisteredClient implements Serializable {
 		private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
 		private String id;
 		private String clientId;
+		private Instant clientIdIssuedAt;
 		private String clientSecret;
+		private Instant clientSecretExpiresAt;
+		private String clientName;
 		private Set<ClientAuthenticationMethod> clientAuthenticationMethods = new HashSet<>();
 		private Set<AuthorizationGrantType> authorizationGrantTypes = new HashSet<>();
 		private Set<String> redirectUris = new HashSet<>();
@@ -221,7 +263,10 @@ public class RegisteredClient implements Serializable {
 		protected Builder(RegisteredClient registeredClient) {
 			this.id = registeredClient.id;
 			this.clientId = registeredClient.clientId;
+			this.clientIdIssuedAt = registeredClient.clientIdIssuedAt;
 			this.clientSecret = registeredClient.clientSecret;
+			this.clientSecretExpiresAt = registeredClient.clientSecretExpiresAt;
+			this.clientName = registeredClient.clientName;
 			if (!CollectionUtils.isEmpty(registeredClient.clientAuthenticationMethods)) {
 				this.clientAuthenticationMethods.addAll(registeredClient.clientAuthenticationMethods);
 			}
@@ -260,6 +305,17 @@ public class RegisteredClient implements Serializable {
 			return this;
 		}
 
+		/**
+		 * Sets the time at which the client identifier was issued.
+		 *
+		 * @param clientIdIssuedAt the time at which the client identifier was issued
+		 * @return the {@link Builder}
+		 */
+		public Builder clientIdIssuedAt(Instant clientIdIssuedAt) {
+			this.clientIdIssuedAt = clientIdIssuedAt;
+			return this;
+		}
+
 		/**
 		 * Sets the client secret.
 		 *
@@ -271,6 +327,28 @@ public class RegisteredClient implements Serializable {
 			return this;
 		}
 
+		/**
+		 * Sets the time at which the client secret expires or {@code null} if it does not expire.
+		 *
+		 * @param clientSecretExpiresAt the time at which the client secret expires or {@code null} if it does not expire
+		 * @return the {@link Builder}
+		 */
+		public Builder clientSecretExpiresAt(Instant clientSecretExpiresAt) {
+			this.clientSecretExpiresAt = clientSecretExpiresAt;
+			return this;
+		}
+
+		/**
+		 * Sets the client name.
+		 *
+		 * @param clientName the client name
+		 * @return the {@link Builder}
+		 */
+		public Builder clientName(String clientName) {
+			this.clientName = clientName;
+			return this;
+		}
+
 		/**
 		 * Adds an {@link ClientAuthenticationMethod authentication method}
 		 * the client may use when authenticating with the authorization server.
@@ -400,6 +478,9 @@ public class RegisteredClient implements Serializable {
 			if (this.authorizationGrantTypes.contains(AuthorizationGrantType.AUTHORIZATION_CODE)) {
 				Assert.notEmpty(this.redirectUris, "redirectUris cannot be empty");
 			}
+			if (!StringUtils.hasText(this.clientName)) {
+				this.clientName = this.id;
+			}
 			if (CollectionUtils.isEmpty(this.clientAuthenticationMethods)) {
 				this.clientAuthenticationMethods.add(ClientAuthenticationMethod.BASIC);
 			}
@@ -413,7 +494,10 @@ public class RegisteredClient implements Serializable {
 
 			registeredClient.id = this.id;
 			registeredClient.clientId = this.clientId;
+			registeredClient.clientIdIssuedAt = this.clientIdIssuedAt;
 			registeredClient.clientSecret = this.clientSecret;
+			registeredClient.clientSecretExpiresAt = this.clientSecretExpiresAt;
+			registeredClient.clientName = this.clientName;
 			registeredClient.clientAuthenticationMethods = Collections.unmodifiableSet(
 					new HashSet<>(this.clientAuthenticationMethods));
 			registeredClient.authorizationGrantTypes = Collections.unmodifiableSet(

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/client/RegisteredClientRepository.java

@@ -22,11 +22,19 @@ import org.springframework.lang.Nullable;
  *
  * @author Joe Grandja
  * @author Anoop Garlapati
+ * @author Ovidiu Popa
  * @see RegisteredClient
  * @since 0.0.1
  */
 public interface RegisteredClientRepository {
 
+	/**
+	 * Saves the registered client.
+	 *
+	 * @param registeredClient the {@link RegisteredClient}
+	 */
+	void save(RegisteredClient registeredClient);
+
 	/**
 	 * Returns the registered client identified by the provided {@code id},
 	 * or {@code null} if not found.
@@ -47,11 +55,4 @@ public interface RegisteredClientRepository {
 	@Nullable
 	RegisteredClient findByClientId(String clientId);
 
-	/**
-	 * Saves a new registered client
-	 *
-	 * @param registeredClient the {@link RegisteredClient} to be saved
-	 */
-	void saveClient(RegisteredClient registeredClient);
-
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/config/ProviderSettings.java

@@ -34,7 +34,6 @@ public class ProviderSettings extends Settings {
 	public static final String TOKEN_REVOCATION_ENDPOINT = PROVIDER_SETTING_BASE.concat("token-revocation-endpoint");
 	public static final String TOKEN_INTROSPECTION_ENDPOINT = PROVIDER_SETTING_BASE.concat("token-introspection-endpoint");
 	public static final String OIDC_CLIENT_REGISTRATION_ENDPOINT = PROVIDER_SETTING_BASE.concat("oidc-client-registration-endpoint");
-	public static final String ENABLE_OIDC_CLIENT_REGISTRATION_ENDPOINT = PROVIDER_SETTING_BASE.concat("enable-oidc-client-registration-endpoint");
 
 	/**
 	 * Constructs a {@code ProviderSettings}.
@@ -167,45 +166,24 @@ public class ProviderSettings extends Settings {
 	}
 
 	/**
-	 * Returns the Provider's OAuth 2.0 OIDC Client Registration endpoint. The default is {@code /connect/register}.
+	 * Returns the Provider's OpenID Connect 1.0 Client Registration endpoint. The default is {@code /connect/register}.
 	 *
-	 * @return the OIDC Client Registration endpoint
+	 * @return the OpenID Connect 1.0 Client Registration endpoint
 	 */
 	public String oidcClientRegistrationEndpoint() {
 		return setting(OIDC_CLIENT_REGISTRATION_ENDPOINT);
 	}
 
 	/**
-	 * Sets the Provider's OAuth 2.0 OIDC Client Registration endpoint.
+	 * Sets the Provider's OpenID Connect 1.0 Client Registration endpoint.
 	 *
-	 * @param oidcClientRegistrationEndpoint the Token Revocation endpoint
+	 * @param oidcClientRegistrationEndpoint the OpenID Connect 1.0 Client Registration endpoint
 	 * @return the {@link ProviderSettings} for further configuration
 	 */
 	public ProviderSettings oidcClientRegistrationEndpoint(String oidcClientRegistrationEndpoint) {
 		return setting(OIDC_CLIENT_REGISTRATION_ENDPOINT, oidcClientRegistrationEndpoint);
 	}
 
-	/**
-	 * Returns {@code true} if the OIDC Client Registration endpoint is enabled.
-	 * The default is {@code false}.
-	 *
-	 * @return {@code true} if the OIDC Client Registration endpoint is enabled, {@code false} otherwise
-	 */
-	public boolean isOidClientRegistrationEndpointEnabled() {
-		return setting(ENABLE_OIDC_CLIENT_REGISTRATION_ENDPOINT);
-	}
-
-	/**
-	 * Set to {@code true} if the OIDC Client Registration Endpoint should be enabled.
-	 *
-	 * @param oidClientRegistrationEndpointEnabled {@code true} if the OIDC Client Registration endpoint should enabled
-	 * @return the {@link ProviderSettings}
-	 */
-	public ProviderSettings isOidClientRegistrationEndpointEnabled(boolean oidClientRegistrationEndpointEnabled) {
-		setting(ENABLE_OIDC_CLIENT_REGISTRATION_ENDPOINT, oidClientRegistrationEndpointEnabled);
-		return this;
-	}
-
 	protected static Map<String, Object> defaultSettings() {
 		Map<String, Object> settings = new HashMap<>();
 		settings.put(AUTHORIZATION_ENDPOINT, "/oauth2/authorize");
@@ -214,7 +192,6 @@ public class ProviderSettings extends Settings {
 		settings.put(TOKEN_REVOCATION_ENDPOINT, "/oauth2/revoke");
 		settings.put(TOKEN_INTROSPECTION_ENDPOINT, "/oauth2/introspect");
 		settings.put(OIDC_CLIENT_REGISTRATION_ENDPOINT, "/connect/register");
-		settings.put(ENABLE_OIDC_CLIENT_REGISTRATION_ENDPOINT, false);
 		return settings;
 	}
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/config/TokenSettings.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 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.
@@ -15,12 +15,14 @@
  */
 package org.springframework.security.oauth2.server.authorization.config;
 
-import org.springframework.util.Assert;
-
 import java.time.Duration;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.springframework.security.oauth2.core.oidc.OidcIdToken;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+import org.springframework.util.Assert;
+
 /**
  * A facility for token configuration settings.
  *
@@ -33,6 +35,7 @@ public class TokenSettings extends Settings {
 	public static final String ACCESS_TOKEN_TIME_TO_LIVE = TOKEN_SETTING_BASE.concat("access-token-time-to-live");
 	public static final String REUSE_REFRESH_TOKENS = TOKEN_SETTING_BASE.concat("reuse-refresh-tokens");
 	public static final String REFRESH_TOKEN_TIME_TO_LIVE = TOKEN_SETTING_BASE.concat("refresh-token-time-to-live");
+	public static final String ID_TOKEN_SIGNATURE_ALGORITHM = TOKEN_SETTING_BASE.concat("id-token-signature-algorithm");
 
 	/**
 	 * Constructs a {@code TokenSettings}.
@@ -114,11 +117,35 @@ public class TokenSettings extends Settings {
 		return this;
 	}
 
+	/**
+	 * Returns the {@link SignatureAlgorithm JWS} algorithm for signing the {@link OidcIdToken ID Token}.
+	 * The default is {@link SignatureAlgorithm#RS256 RS256}.
+	 *
+	 * @return the {@link SignatureAlgorithm JWS} algorithm for signing the {@link OidcIdToken ID Token}
+	 */
+	public SignatureAlgorithm idTokenSignatureAlgorithm() {
+		return setting(ID_TOKEN_SIGNATURE_ALGORITHM);
+	}
+
+	/**
+	 * Sets the {@link SignatureAlgorithm JWS} algorithm for signing the {@link OidcIdToken ID Token}.
+	 *
+	 * @param idTokenSignatureAlgorithm the {@link SignatureAlgorithm JWS} algorithm for signing the {@link OidcIdToken ID Token}
+	 * @return the {@link TokenSettings}
+	 */
+	public TokenSettings idTokenSignatureAlgorithm(SignatureAlgorithm idTokenSignatureAlgorithm) {
+		Assert.notNull(idTokenSignatureAlgorithm, "idTokenSignatureAlgorithm cannot be null");
+		setting(ID_TOKEN_SIGNATURE_ALGORITHM, idTokenSignatureAlgorithm);
+		return this;
+	}
+
 	protected static Map<String, Object> defaultSettings() {
 		Map<String, Object> settings = new HashMap<>();
 		settings.put(ACCESS_TOKEN_TIME_TO_LIVE, Duration.ofMinutes(5));
 		settings.put(REUSE_REFRESH_TOKENS, true);
 		settings.put(REFRESH_TOKEN_TIME_TO_LIVE, Duration.ofMinutes(60));
+		settings.put(ID_TOKEN_SIGNATURE_ALGORITHM, SignatureAlgorithm.RS256);
 		return settings;
 	}
+
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/oidc/authentication/OidcAuthenticationProviderUtils.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2020-2021 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
+ *
+ *      https://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.security.oauth2.server.authorization.oidc.authentication;
+
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.oauth2.core.AbstractOAuth2Token;
+import org.springframework.security.oauth2.core.OAuth2RefreshToken;
+import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
+import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationCode;
+
+/**
+ * Utility methods for the OpenID Connect 1.0 {@link AuthenticationProvider}'s.
+ *
+ * @author Joe Grandja
+ * @since 0.1.1
+ */
+final class OidcAuthenticationProviderUtils {
+
+	private OidcAuthenticationProviderUtils() {
+	}
+
+	static <T extends AbstractOAuth2Token> OAuth2Authorization invalidate(
+			OAuth2Authorization authorization, T token) {
+
+		// @formatter:off
+		OAuth2Authorization.Builder authorizationBuilder = OAuth2Authorization.from(authorization)
+				.token(token,
+						(metadata) ->
+								metadata.put(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME, true));
+
+		if (OAuth2RefreshToken.class.isAssignableFrom(token.getClass())) {
+			authorizationBuilder.token(
+					authorization.getAccessToken().getToken(),
+					(metadata) ->
+							metadata.put(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME, true));
+
+			OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode =
+					authorization.getToken(OAuth2AuthorizationCode.class);
+			if (authorizationCode != null && !authorizationCode.isInvalidated()) {
+				authorizationBuilder.token(
+						authorizationCode.getToken(),
+						(metadata) ->
+								metadata.put(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME, true));
+			}
+		}
+		// @formatter:on
+
+		return authorizationBuilder.build();
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/oidc/authentication/OidcClientRegistrationAuthenticationProvider.java

@@ -0,0 +1,218 @@
+/*
+ * Copyright 2020-2021 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
+ *
+ *      https://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.security.oauth2.server.authorization.oidc.authentication;
+
+import java.time.Instant;
+import java.util.Base64;
+import java.util.Collection;
+import java.util.UUID;
+
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.crypto.keygen.Base64StringKeyGenerator;
+import org.springframework.security.crypto.keygen.StringKeyGenerator;
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+import org.springframework.security.oauth2.core.OAuth2AccessToken;
+import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
+import org.springframework.security.oauth2.core.OAuth2Error;
+import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
+import org.springframework.security.oauth2.core.OAuth2TokenType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
+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.RegisteredClientRepository;
+import org.springframework.security.oauth2.server.resource.authentication.AbstractOAuth2TokenAuthenticationToken;
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+
+/**
+ * An {@link AuthenticationProvider} implementation for OpenID Connect Dynamic Client Registration 1.0.
+ *
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see RegisteredClientRepository
+ * @see OAuth2AuthorizationService
+ * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientRegistration">3. Client Registration Endpoint</a>
+ */
+public class OidcClientRegistrationAuthenticationProvider implements AuthenticationProvider {
+	private static final StringKeyGenerator CLIENT_ID_GENERATOR = new Base64StringKeyGenerator(
+			Base64.getUrlEncoder().withoutPadding(), 32);
+	private static final StringKeyGenerator CLIENT_SECRET_GENERATOR = new Base64StringKeyGenerator(
+			Base64.getUrlEncoder().withoutPadding(), 48);
+	private static final String DEFAULT_AUTHORIZED_SCOPE = "client.create";
+	private final RegisteredClientRepository registeredClientRepository;
+	private final OAuth2AuthorizationService authorizationService;
+
+	/**
+	 * Constructs an {@code OidcClientRegistrationAuthenticationProvider} using the provided parameters.
+	 *
+	 * @param registeredClientRepository the repository of registered clients
+	 * @param authorizationService the authorization service
+	 */
+	public OidcClientRegistrationAuthenticationProvider(RegisteredClientRepository registeredClientRepository,
+			OAuth2AuthorizationService authorizationService) {
+		Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
+		Assert.notNull(authorizationService, "authorizationService cannot be null");
+		this.registeredClientRepository = registeredClientRepository;
+		this.authorizationService = authorizationService;
+	}
+
+	@Override
+	public Authentication authenticate(Authentication authentication) throws AuthenticationException {
+		OidcClientRegistrationAuthenticationToken clientRegistrationAuthentication =
+				(OidcClientRegistrationAuthenticationToken) authentication;
+
+		// Validate the "initial" access token
+		AbstractOAuth2TokenAuthenticationToken<?> accessTokenAuthentication = null;
+		if (AbstractOAuth2TokenAuthenticationToken.class.isAssignableFrom(clientRegistrationAuthentication.getPrincipal().getClass())) {
+			accessTokenAuthentication = (AbstractOAuth2TokenAuthenticationToken<?>) clientRegistrationAuthentication.getPrincipal();
+		}
+		if (accessTokenAuthentication == null || !accessTokenAuthentication.isAuthenticated()) {
+			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_TOKEN));
+		}
+
+		String accessTokenValue = accessTokenAuthentication.getToken().getTokenValue();
+
+		OAuth2Authorization authorization = this.authorizationService.findByToken(
+				accessTokenValue, OAuth2TokenType.ACCESS_TOKEN);
+		if (authorization == null) {
+			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_TOKEN));
+		}
+
+		OAuth2Authorization.Token<OAuth2AccessToken> authorizedAccessToken = authorization.getAccessToken();
+		if (!authorizedAccessToken.isActive()) {
+			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_TOKEN));
+		}
+
+		if (!isAuthorized(authorizedAccessToken)) {
+			throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INSUFFICIENT_SCOPE));
+		}
+
+		RegisteredClient registeredClient = create(clientRegistrationAuthentication.getClientRegistration());
+		this.registeredClientRepository.save(registeredClient);
+
+		// Invalidate the "initial" access token as it can only be used once
+		authorization = OidcAuthenticationProviderUtils.invalidate(authorization, authorizedAccessToken.getToken());
+		if (authorization.getRefreshToken() != null) {
+			authorization = OidcAuthenticationProviderUtils.invalidate(authorization, authorization.getRefreshToken().getToken());
+		}
+		this.authorizationService.save(authorization);
+
+		return new OidcClientRegistrationAuthenticationToken(
+				accessTokenAuthentication, convert(registeredClient));
+	}
+
+	@Override
+	public boolean supports(Class<?> authentication) {
+		return OidcClientRegistrationAuthenticationToken.class.isAssignableFrom(authentication);
+	}
+
+	@SuppressWarnings("unchecked")
+	private static boolean isAuthorized(OAuth2Authorization.Token<OAuth2AccessToken> authorizedAccessToken) {
+		Object scope = authorizedAccessToken.getClaims().get(OAuth2ParameterNames.SCOPE);
+		return scope != null && ((Collection<String>) scope).contains(DEFAULT_AUTHORIZED_SCOPE);
+	}
+
+	private static RegisteredClient create(OidcClientRegistration clientRegistration) {
+		// @formatter:off
+		RegisteredClient.Builder builder = RegisteredClient.withId(UUID.randomUUID().toString())
+				.clientId(CLIENT_ID_GENERATOR.generateKey())
+				.clientIdIssuedAt(Instant.now())
+				.clientSecret(CLIENT_SECRET_GENERATOR.generateKey())
+				.clientName(clientRegistration.getClientName());
+
+		if ("client_secret_post".equals(clientRegistration.getTokenEndpointAuthenticationMethod())) {
+			// TODO: Use ClientAuthenticationMethod.CLIENT_SECRET_POST in Spring Security 5.5.0
+			builder.clientAuthenticationMethod(ClientAuthenticationMethod.POST);
+		} else {
+			// TODO: Use ClientAuthenticationMethod.CLIENT_SECRET_BASIC in Spring Security 5.5.0
+			builder.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC);
+		}
+
+		// TODO Validate redirect_uris and throw OAuth2ErrorCodes2.INVALID_REDIRECT_URI on error
+		builder.redirectUris(redirectUris ->
+				redirectUris.addAll(clientRegistration.getRedirectUris()));
+
+		if (!CollectionUtils.isEmpty(clientRegistration.getGrantTypes())) {
+			builder.authorizationGrantTypes(authorizationGrantTypes ->
+					clientRegistration.getGrantTypes().forEach(grantType ->
+							authorizationGrantTypes.add(new AuthorizationGrantType(grantType))));
+		} else {
+			builder.authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE);
+		}
+		if (CollectionUtils.isEmpty(clientRegistration.getResponseTypes()) ||
+				clientRegistration.getResponseTypes().contains(OAuth2AuthorizationResponseType.CODE.getValue())) {
+			builder.authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE);
+		}
+
+		if (!CollectionUtils.isEmpty(clientRegistration.getScopes())) {
+			builder.scopes(scopes ->
+					scopes.addAll(clientRegistration.getScopes()));
+		}
+
+		builder
+				.clientSettings(clientSettings ->
+						clientSettings
+								.requireProofKey(true)
+								.requireUserConsent(true))
+				.tokenSettings(tokenSettings ->
+						tokenSettings
+								.idTokenSignatureAlgorithm(SignatureAlgorithm.RS256));
+
+		return builder.build();
+		// @formatter:on
+	}
+
+	private static OidcClientRegistration convert(RegisteredClient registeredClient) {
+		// @formatter:off
+		OidcClientRegistration.Builder builder = OidcClientRegistration.builder()
+				.clientId(registeredClient.getClientId())
+				.clientIdIssuedAt(registeredClient.getClientIdIssuedAt())
+				.clientSecret(registeredClient.getClientSecret())
+				.clientName(registeredClient.getClientName());
+
+		builder.redirectUris(redirectUris ->
+				redirectUris.addAll(registeredClient.getRedirectUris()));
+
+		builder.grantTypes(grantTypes ->
+				registeredClient.getAuthorizationGrantTypes().forEach(authorizationGrantType ->
+						grantTypes.add(authorizationGrantType.getValue())));
+
+		if (registeredClient.getAuthorizationGrantTypes().contains(AuthorizationGrantType.AUTHORIZATION_CODE)) {
+			builder.responseType(OAuth2AuthorizationResponseType.CODE.getValue());
+		}
+
+		if (!CollectionUtils.isEmpty(registeredClient.getScopes())) {
+			builder.scopes(scopes ->
+					scopes.addAll(registeredClient.getScopes()));
+		}
+
+		builder
+				.tokenEndpointAuthenticationMethod(registeredClient.getClientAuthenticationMethods().iterator().next().getValue())
+				.idTokenSignedResponseAlgorithm(registeredClient.getTokenSettings().idTokenSignatureAlgorithm().getName());
+
+		return builder.build();
+		// @formatter:on
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/oidc/authentication/OidcClientRegistrationAuthenticationToken.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2020-2021 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
+ *
+ *      https://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.security.oauth2.server.authorization.oidc.authentication;
+
+import java.util.Collections;
+
+import org.springframework.security.authentication.AbstractAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.oauth2.core.Version;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+import org.springframework.util.Assert;
+
+/**
+ * An {@link Authentication} implementation used for OpenID Connect Dynamic Client Registration 1.0.
+ *
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see AbstractAuthenticationToken
+ * @see OidcClientRegistration
+ * @see OidcClientRegistrationAuthenticationProvider
+ */
+public class OidcClientRegistrationAuthenticationToken extends AbstractAuthenticationToken {
+	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
+	private final Authentication principal;
+	private final OidcClientRegistration clientRegistration;
+
+	/**
+	 * Constructs an {@code OidcClientRegistrationAuthenticationToken} using the provided parameters.
+	 *
+	 * @param principal the authenticated principal
+	 * @param clientRegistration the client registration
+	 */
+	public OidcClientRegistrationAuthenticationToken(Authentication principal, OidcClientRegistration clientRegistration) {
+		super(Collections.emptyList());
+		Assert.notNull(principal, "principal cannot be null");
+		Assert.notNull(clientRegistration, "clientRegistration cannot be null");
+		this.principal = principal;
+		this.clientRegistration = clientRegistration;
+		setAuthenticated(principal.isAuthenticated());
+	}
+
+	@Override
+	public Object getPrincipal() {
+		return this.principal;
+	}
+
+	@Override
+	public Object getCredentials() {
+		return "";
+	}
+
+	/**
+	 * Returns the client registration.
+	 *
+	 * @return the client registration
+	 */
+	public OidcClientRegistration getClientRegistration() {
+		return this.clientRegistration;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/oidc/web/OidcClientRegistrationEndpointFilter.java

@@ -15,180 +15,130 @@
  */
 package org.springframework.security.oauth2.server.authorization.oidc.web;
 
-import org.springframework.core.convert.converter.Converter;
+import java.io.IOException;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.server.ServletServerHttpRequest;
 import org.springframework.http.server.ServletServerHttpResponse;
 import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.context.SecurityContextHolder;
-import org.springframework.security.oauth2.core.AuthorizationGrantType;
-import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
 import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
 import org.springframework.security.oauth2.core.OAuth2Error;
-import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
 import org.springframework.security.oauth2.core.http.converter.OAuth2ErrorHttpMessageConverter;
 import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
 import org.springframework.security.oauth2.core.oidc.http.converter.OidcClientRegistrationHttpMessageConverter;
-import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
-import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
+import org.springframework.security.oauth2.server.authorization.oidc.authentication.OidcClientRegistrationAuthenticationToken;
 import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
 import org.springframework.security.web.util.matcher.RequestMatcher;
 import org.springframework.util.Assert;
 import org.springframework.web.filter.OncePerRequestFilter;
 
-import javax.servlet.FilterChain;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.time.Instant;
-import java.util.Arrays;
-import java.util.List;
-import java.util.UUID;
-import java.util.stream.Collectors;
-
 /**
- * A {@code Filter} that processes OpenID Client Registration Requests.
+ * A {@code Filter} that processes OpenID Connect Dynamic Client Registration 1.0 Requests.
+ *
  * @author Ovidiu Popa
+ * @author Joe Grandja
  * @since 0.1.1
  * @see OidcClientRegistration
- * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientRegistration">3.1.  Client Registration Request</a>
+ * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientRegistration">3. Client Registration Endpoint</a>
  */
 public class OidcClientRegistrationEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for OpenID Client Registration requests.
 	 */
 	public static final String DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI = "/connect/register";
-	private static final String SCOPE_CLAIM_DELIMITER = " ";
 
-	private final OidcClientRegistrationHttpMessageConverter clientRegistrationHttpMessageConverter =
+	private final AuthenticationManager authenticationManager;
+	private final RequestMatcher clientRegistrationEndpointMatcher;
+	private final HttpMessageConverter<OidcClientRegistration> clientRegistrationHttpMessageConverter =
 			new OidcClientRegistrationHttpMessageConverter();
-	private final RegisteredClientRepository registeredClientRepository;
-	private final OidcClientRegistrationToRegisteredClientConverter oidcClientToRegisteredClientConverter =
-			new OidcClientRegistrationToRegisteredClientConverter();
-	private final RegisteredClientToOidcClientRegistrationConverter registeredClientToOidcClientConverter =
-			new RegisteredClientToOidcClientRegistrationConverter();
 	private final HttpMessageConverter<OAuth2Error> errorHttpResponseConverter =
 			new OAuth2ErrorHttpMessageConverter();
-	private final RequestMatcher requestMatcher;
-	private final AuthenticationManager authenticationManager;
 
 	/**
 	 * Constructs an {@code OidcClientRegistrationEndpointFilter} using the provided parameters.
 	 *
-	 * @param registeredClientRepository the repository of registered clients
 	 * @param authenticationManager the authentication manager
 	 */
-	public OidcClientRegistrationEndpointFilter(RegisteredClientRepository registeredClientRepository,
-			AuthenticationManager authenticationManager) {
-		this(registeredClientRepository, authenticationManager, DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI);
+	public OidcClientRegistrationEndpointFilter(AuthenticationManager authenticationManager) {
+		this(authenticationManager, DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI);
 	}
 
 	/**
 	 * Constructs an {@code OidcClientRegistrationEndpointFilter} using the provided parameters.
 	 *
-	 * @param registeredClientRepository the repository of registered clients
 	 * @param authenticationManager the authentication manager
-	 * @param oidcClientRegistrationUri the endpoint {@code URI} for OIDC Client Registration requests
+	 * @param clientRegistrationEndpointUri the endpoint {@code URI} for OpenID Client Registration requests
 	 */
-	public OidcClientRegistrationEndpointFilter(RegisteredClientRepository registeredClientRepository,
-			AuthenticationManager authenticationManager, String oidcClientRegistrationUri) {
-		Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
+	public OidcClientRegistrationEndpointFilter(AuthenticationManager authenticationManager,
+			String clientRegistrationEndpointUri) {
 		Assert.notNull(authenticationManager, "authenticationManager cannot be null");
-		Assert.hasText(oidcClientRegistrationUri, "oidcClientRegistrationUri cannot be empty");
-		this.registeredClientRepository = registeredClientRepository;
+		Assert.hasText(clientRegistrationEndpointUri, "clientRegistrationEndpointUri cannot be empty");
 		this.authenticationManager = authenticationManager;
-		this.requestMatcher = new AntPathRequestMatcher(
-				oidcClientRegistrationUri,
-				HttpMethod.POST.name()
-		);
+		this.clientRegistrationEndpointMatcher = new AntPathRequestMatcher(
+				clientRegistrationEndpointUri, HttpMethod.POST.name());
 	}
 
 	@Override
 	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
 			throws ServletException, IOException {
 
-		if (!this.requestMatcher.matches(request)) {
+		if (!this.clientRegistrationEndpointMatcher.matches(request)) {
 			filterChain.doFilter(request, response);
 			return;
 		}
 
 		try {
-			Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
-			authenticationManager.authenticate(authentication);
-			OidcClientRegistration clientRegistrationRequest =
-					this.clientRegistrationHttpMessageConverter.read(OidcClientRegistration.class, new ServletServerHttpRequest(request));
+			Authentication principal = SecurityContextHolder.getContext().getAuthentication();
+			OidcClientRegistration clientRegistration = this.clientRegistrationHttpMessageConverter.read(
+					OidcClientRegistration.class, new ServletServerHttpRequest(request));
 
-			RegisteredClient registeredClient = this.oidcClientToRegisteredClientConverter
-					.convert(clientRegistrationRequest);
-			this.registeredClientRepository.saveClient(registeredClient);
+			OidcClientRegistrationAuthenticationToken clientRegistrationAuthentication =
+					new OidcClientRegistrationAuthenticationToken(principal, clientRegistration);
 
-			OidcClientRegistration convert = this.registeredClientToOidcClientConverter
-					.convert(registeredClient);
+			OidcClientRegistrationAuthenticationToken clientRegistrationAuthenticationResult =
+					(OidcClientRegistrationAuthenticationToken) this.authenticationManager.authenticate(clientRegistrationAuthentication);
+
+			sendClientRegistrationResponse(response, clientRegistrationAuthenticationResult.getClientRegistration());
 
-			final ServletServerHttpResponse httpResponse = new ServletServerHttpResponse(response);
-			httpResponse.setStatusCode(HttpStatus.CREATED);
-			this.clientRegistrationHttpMessageConverter.write(
-					convert, MediaType.APPLICATION_JSON, httpResponse);
 		} catch (OAuth2AuthenticationException ex) {
-			SecurityContextHolder.clearContext();
 			sendErrorResponse(response, ex.getError());
+		} catch (Exception ex) {
+			OAuth2Error error = new OAuth2Error(
+					OAuth2ErrorCodes.INVALID_REQUEST,
+					"OpenID Client Registration Error: " + ex.getMessage(),
+					"https://openid.net/specs/openid-connect-registration-1_0.html#RegistrationError");
+			sendErrorResponse(response, error);
+		} finally {
+			SecurityContextHolder.clearContext();
 		}
 	}
 
+	private void sendClientRegistrationResponse(HttpServletResponse response, OidcClientRegistration clientRegistration) throws IOException {
+		ServletServerHttpResponse httpResponse = new ServletServerHttpResponse(response);
+		httpResponse.setStatusCode(HttpStatus.CREATED);
+		this.clientRegistrationHttpMessageConverter.write(clientRegistration, null, httpResponse);
+	}
+
 	private void sendErrorResponse(HttpServletResponse response, OAuth2Error error) throws IOException {
+		HttpStatus httpStatus = HttpStatus.BAD_REQUEST;
+		if (error.getErrorCode().equals(OAuth2ErrorCodes.INVALID_TOKEN)) {
+			httpStatus = HttpStatus.UNAUTHORIZED;
+		} else if (error.getErrorCode().equals(OAuth2ErrorCodes.INSUFFICIENT_SCOPE)) {
+			httpStatus = HttpStatus.FORBIDDEN;
+		}
 		ServletServerHttpResponse httpResponse = new ServletServerHttpResponse(response);
-		httpResponse.setStatusCode(HttpStatus.BAD_REQUEST);
+		httpResponse.setStatusCode(httpStatus);
 		this.errorHttpResponseConverter.write(error, null, httpResponse);
 	}
 
-	private static class OidcClientRegistrationToRegisteredClientConverter implements Converter<OidcClientRegistration, RegisteredClient> {
-
-		@Override
-		public RegisteredClient convert(OidcClientRegistration clientRegistration) {
-			return RegisteredClient.withId(UUID.randomUUID().toString())
-					.clientId(UUID.randomUUID().toString())
-					.clientSecret(UUID.randomUUID().toString())
-					.redirectUris(redirectUris ->
-							redirectUris.addAll(clientRegistration.getRedirectUris()))
-					.clientAuthenticationMethod(new ClientAuthenticationMethod(clientRegistration.getTokenEndpointAuthenticationMethod()))
-					.authorizationGrantTypes(grantTypes ->
-							grantTypes.addAll(this.grantTypes(clientRegistration)))
-					.scopes(scopes ->
-							scopes.addAll(Arrays.asList(clientRegistration.getScope().split(SCOPE_CLAIM_DELIMITER))))
-					.clientSettings(clientSettings -> clientSettings.requireUserConsent(true))
-					.build();
-		}
-
-		private List<AuthorizationGrantType> grantTypes(OidcClientRegistration clientRegistration) {
-			return clientRegistration.getGrantTypes().stream()
-					.map(AuthorizationGrantType::new)
-					.collect(Collectors.toList());
-		}
-	}
-
-	private static class RegisteredClientToOidcClientRegistrationConverter implements Converter<RegisteredClient, OidcClientRegistration> {
-
-		@Override
-		public OidcClientRegistration convert(RegisteredClient source) {
-			return OidcClientRegistration.builder()
-					.clientId(source.getClientId())
-					.redirectUris(uris -> uris.addAll(source.getRedirectUris()))
-					.clientIdIssuedAt(Instant.now())
-					.clientSecret(source.getClientSecret())
-					.clientSecretExpiresAt(Instant.EPOCH)
-					.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
-					.grantTypes(grantTypes ->
-							grantTypes.addAll(source.getAuthorizationGrantTypes().stream().map(AuthorizationGrantType::getValue)
-									.collect(Collectors.toList()))
-					)
-					.scope(String.join(SCOPE_CLAIM_DELIMITER, source.getScopes()))
-					.tokenEndpointAuthenticationMethod(source.getClientAuthenticationMethods().iterator().next().getValue())
-					.build();
-		}
-	}
 }

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

@@ -22,6 +22,7 @@ import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.Test;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;

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

@@ -53,11 +53,10 @@ 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.jose.TestJwks;
-import org.springframework.security.oauth2.jose.TestKeys;
 import org.springframework.security.oauth2.jwt.Jwt;
+import org.springframework.security.oauth2.jwt.JwtDecoder;
 import org.springframework.security.oauth2.jwt.JwtEncoder;
 import org.springframework.security.oauth2.jwt.NimbusJwsEncoder;
-import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
 import org.springframework.security.oauth2.server.authorization.JwtEncodingContext;
 import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
 import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationCode;
@@ -111,7 +110,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 	private static OAuth2AuthorizationService authorizationService;
 	private static JWKSource<SecurityContext> jwkSource;
 	private static NimbusJwsEncoder jwtEncoder;
-	private static NimbusJwtDecoder jwtDecoder;
 	private static ProviderSettings providerSettings;
 	private static HttpMessageConverter<OAuth2AccessTokenResponse> accessTokenHttpResponseConverter =
 			new OAuth2AccessTokenResponseHttpMessageConverter();
@@ -122,6 +120,9 @@ public class OAuth2AuthorizationCodeGrantTests {
 	@Autowired
 	private MockMvc mvc;
 
+	@Autowired
+	private JwtDecoder jwtDecoder;
+
 	@BeforeClass
 	public static void init() {
 		registeredClientRepository = mock(RegisteredClientRepository.class);
@@ -129,7 +130,6 @@ public class OAuth2AuthorizationCodeGrantTests {
 		JWKSet jwkSet = new JWKSet(TestJwks.DEFAULT_RSA_JWK);
 		jwkSource = (jwkSelector, securityContext) -> jwkSelector.select(jwkSet);
 		jwtEncoder = new NimbusJwsEncoder(jwkSource);
-		jwtDecoder = NimbusJwtDecoder.withPublicKey(TestKeys.DEFAULT_PUBLIC_KEY).build();
 		providerSettings = new ProviderSettings()
 				.authorizationEndpoint("/test/authorize")
 				.tokenEndpoint("/test/token");
@@ -206,7 +206,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 				registeredClient, authorization, OAuth2TokenEndpointFilter.DEFAULT_TOKEN_ENDPOINT_URI);
 
 		// Assert user authorities was propagated as claim in JWT
-		Jwt jwt = jwtDecoder.decode(accessTokenResponse.getAccessToken().getTokenValue());
+		Jwt jwt = this.jwtDecoder.decode(accessTokenResponse.getAccessToken().getTokenValue());
 		List<String> authoritiesClaim = jwt.getClaim(AUTHORITIES_CLAIM);
 		Authentication principal = authorization.getAttribute(Principal.class.getName());
 		Set<String> userAuthorities = principal.getAuthorities().stream()

oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ClientCredentialsGrantTests.java

@@ -15,6 +15,10 @@
  */
 package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
 
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
+
 import com.nimbusds.jose.jwk.JWKSet;
 import com.nimbusds.jose.jwk.source.JWKSource;
 import com.nimbusds.jose.proc.SecurityContext;
@@ -22,6 +26,7 @@ import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.Test;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;
@@ -42,10 +47,6 @@ import org.springframework.security.oauth2.server.authorization.web.OAuth2TokenE
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
-import java.util.Base64;
-
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;

oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2RefreshTokenGrantTests.java

@@ -15,6 +15,14 @@
  */
 package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
 
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.security.Principal;
+import java.util.Base64;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
 import com.nimbusds.jose.jwk.JWKSet;
 import com.nimbusds.jose.jwk.source.JWKSource;
 import com.nimbusds.jose.proc.SecurityContext;
@@ -22,6 +30,7 @@ import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.Test;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;
@@ -58,14 +67,6 @@ import org.springframework.test.web.servlet.MvcResult;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
-import java.security.Principal;
-import java.util.Base64;
-import java.util.List;
-import java.util.Set;
-import java.util.stream.Collectors;
-
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.hamcrest.CoreMatchers.containsString;
 import static org.mockito.ArgumentMatchers.any;

oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2TokenRevocationTests.java

@@ -15,6 +15,10 @@
  */
 package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
 
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
+
 import com.nimbusds.jose.jwk.JWKSet;
 import com.nimbusds.jose.jwk.source.JWKSource;
 import com.nimbusds.jose.proc.SecurityContext;
@@ -23,6 +27,7 @@ import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.Test;
 import org.mockito.ArgumentCaptor;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;
@@ -48,10 +53,6 @@ import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
-import java.util.Base64;
-
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.ArgumentMatchers.isNull;

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

@@ -15,8 +15,10 @@
  */
 package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
+
 import com.nimbusds.jose.jwk.JWKSet;
 import com.nimbusds.jose.jwk.source.JWKSource;
 import com.nimbusds.jose.proc.SecurityContext;
@@ -25,6 +27,7 @@ import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.Test;
 import org.mockito.ArgumentCaptor;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;
@@ -32,6 +35,7 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.mock.http.MockHttpOutputMessage;
 import org.springframework.mock.http.client.MockClientHttpResponse;
 import org.springframework.mock.web.MockHttpServletResponse;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
@@ -48,25 +52,19 @@ import org.springframework.security.oauth2.core.http.converter.OAuth2AccessToken
 import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
 import org.springframework.security.oauth2.core.oidc.http.converter.OidcClientRegistrationHttpMessageConverter;
 import org.springframework.security.oauth2.jose.TestJwks;
-import org.springframework.security.oauth2.jose.TestKeys;
-import org.springframework.security.oauth2.jwt.JwtDecoder;
-import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
 import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
 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.RegisteredClientRepository;
 import org.springframework.security.oauth2.server.authorization.client.TestRegisteredClients;
-import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.oidc.web.OidcClientRegistrationEndpointFilter;
 import org.springframework.security.oauth2.server.authorization.web.OAuth2TokenEndpointFilter;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.MvcResult;
 
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
-import java.util.Base64;
-import java.util.Map;
-
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.CoreMatchers.containsString;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doNothing;
@@ -75,35 +73,24 @@ import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
 /**
- * Integration tests for OpenID Connect 1.0 Client Registration Endpoint.
+ * Integration tests for OpenID Connect Dynamic Client Registration 1.0.
  *
  * @author Ovidiu Popa
- * @since 0.1.1
+ * @author Joe Grandja
  */
 public class OidcClientRegistrationTests {
-	private static final OidcClientRegistration.Builder OIDC_CLIENT_REGISTRATION = OidcClientRegistration.builder()
-			.redirectUri("https://localhost:8080/client")
-			.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
-			.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
-			.tokenEndpointAuthenticationMethod(ClientAuthenticationMethod.BASIC.getValue())
-			.scope("test");
-
 	private static final HttpMessageConverter<OAuth2AccessTokenResponse> accessTokenHttpResponseConverter =
 			new OAuth2AccessTokenResponseHttpMessageConverter();
-
-	private static final OidcClientRegistrationHttpMessageConverter clientRegistrationHttpMessageConverter =
+	private static final HttpMessageConverter<OidcClientRegistration> clientRegistrationHttpMessageConverter =
 			new OidcClientRegistrationHttpMessageConverter();
-
-	private static final OAuth2TokenType ACCESS_TOKEN_TOKEN_TYPE = new OAuth2TokenType(OAuth2ParameterNames.ACCESS_TOKEN);
-
 	private static RegisteredClientRepository registeredClientRepository;
 	private static OAuth2AuthorizationService authorizationService;
 	private static JWKSource<SecurityContext> jwkSource;
-	private static NimbusJwtDecoder jwtDecoder;
 
 	@Rule
 	public final SpringTestRule spring = new SpringTestRule();
@@ -117,7 +104,6 @@ public class OidcClientRegistrationTests {
 		authorizationService = mock(OAuth2AuthorizationService.class);
 		JWKSet jwkSet = new JWKSet(TestJwks.DEFAULT_RSA_JWK);
 		jwkSource = (jwkSelector, securityContext) -> jwkSelector.select(jwkSet);
-		jwtDecoder = NimbusJwtDecoder.withPublicKey(TestKeys.DEFAULT_PUBLIC_KEY).build();
 	}
 
 	@Before
@@ -127,63 +113,83 @@ public class OidcClientRegistrationTests {
 	}
 
 	@Test
-	public void requestWhenAuthenticatedThenResponseIncludesRegisteredClientDetails() throws Exception {
-		this.spring.register(AuthorizationServerConfigurationEnabledClientRegistration.class).autowire();
+	public void requestWhenClientRegistrationRequestAuthorizedThenClientRegistrationResponse() throws Exception {
+		this.spring.register(AuthorizationServerConfiguration.class).autowire();
+
+		// ***** (1) Obtain the "initial" access token used for registering the client
+
+		String clientRegistrationScope = "client.create";
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient2()
-				.scope("client.create").build();
+				.scope(clientRegistrationScope)
+				.build();
 		when(registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 				.thenReturn(registeredClient);
-		// get access token
+
 		MvcResult mvcResult = this.mvc.perform(post(OAuth2TokenEndpointFilter.DEFAULT_TOKEN_ENDPOINT_URI)
 				.param(OAuth2ParameterNames.GRANT_TYPE, AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
-				.param(OAuth2ParameterNames.SCOPE, "client.create")
+				.param(OAuth2ParameterNames.SCOPE, clientRegistrationScope)
 				.header(HttpHeaders.AUTHORIZATION, "Basic " + encodeBasicAuth(
 						registeredClient.getClientId(), registeredClient.getClientSecret())))
 				.andExpect(status().isOk())
 				.andExpect(jsonPath("$.access_token").isNotEmpty())
-				.andExpect(jsonPath("$.scope").value("client.create"))
+				.andExpect(jsonPath("$.scope").value(clientRegistrationScope))
 				.andReturn();
 
-		//assert get access token
+		OAuth2AccessToken accessToken = readAccessTokenResponse(mvcResult.getResponse()).getAccessToken();
+
 		verify(registeredClientRepository).findByClientId(eq(registeredClient.getClientId()));
 		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
 		verify(authorizationService).save(authorizationCaptor.capture());
 		OAuth2Authorization authorization = authorizationCaptor.getValue();
-		MockHttpServletResponse servletResponse = mvcResult.getResponse();
-		MockClientHttpResponse httpResponse = new MockClientHttpResponse(
-				servletResponse.getContentAsByteArray(), HttpStatus.valueOf(servletResponse.getStatus()));
-		OAuth2AccessTokenResponse accessTokenResponse = accessTokenHttpResponseConverter.read(OAuth2AccessTokenResponse.class, httpResponse);
-		String tokenValue = accessTokenResponse.getAccessToken().getTokenValue();
 
-		// prepare register client request
-		when(authorizationService.findByToken(
-				eq(authorization.getToken(OAuth2AccessToken.class).getToken().getTokenValue()),
-				eq(ACCESS_TOKEN_TOKEN_TYPE)))
+		// ***** (2) Register the client
+
+		when(authorizationService.findByToken(eq(accessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN)))
 				.thenReturn(authorization);
-		doNothing().when(registeredClientRepository).saveClient(any(RegisteredClient.class));
-		mvcResult = this.mvc.perform(post("/connect/register")
-				.header(HttpHeaders.AUTHORIZATION, "Bearer " + tokenValue)
+		doNothing().when(registeredClientRepository).save(any(RegisteredClient.class));
+
+		// @formatter:off
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.clientName("client-name")
+				.redirectUri("https://client.example.com")
+				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
+				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
+				.scope("scope1")
+				.scope("scope2")
+				.build();
+		// @formatter:on
+
+		HttpHeaders httpHeaders = new HttpHeaders();
+		httpHeaders.setBearerAuth(accessToken.getTokenValue());
+
+		// Register the client
+		mvcResult = this.mvc.perform(post(OidcClientRegistrationEndpointFilter.DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI)
+				.headers(httpHeaders)
 				.contentType(MediaType.APPLICATION_JSON)
-				.content(convertToByteArray(OIDC_CLIENT_REGISTRATION.build())))
-				.andExpect(status().isCreated()).andReturn();
+				.content(getClientRegistrationRequestContent(clientRegistration)))
+				.andExpect(status().isCreated())
+				.andExpect(header().string(HttpHeaders.CACHE_CONTROL, containsString("no-store")))
+				.andExpect(header().string(HttpHeaders.PRAGMA, containsString("no-cache")))
+				.andReturn();
 
-		servletResponse = mvcResult.getResponse();
-		httpResponse = new MockClientHttpResponse(
-				servletResponse.getContentAsByteArray(), HttpStatus.valueOf(servletResponse.getStatus()));
-
-		OidcClientRegistration result = clientRegistrationHttpMessageConverter.read(OidcClientRegistration.class, httpResponse);
-
-
-		assertThat(result).isNotNull();
-		assertThat(result.getClaimAsString("client_id")).isNotEmpty();
-		assertThat(result.getClaimAsString("client_id_issued_at")).isNotEmpty();
-		assertThat(result.getClaimAsString("client_secret")).isNotEmpty();
-		assertThat(result.getClaimAsString("client_secret_expires_at")).isNotNull().isEqualTo("0.0");
-		assertThat(result.getRedirectUris()).isNotEmpty().containsExactly("https://localhost:8080/client");
-		assertThat(result.getResponseTypes()).isNotEmpty().containsExactly(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(result.getGrantTypes()).isNotEmpty().containsExactly(AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
-		assertThat(result.getTokenEndpointAuthenticationMethod()).isNotEmpty().isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
-		assertThat(result.getScope()).isNotEmpty().isEqualTo("test");
+		OidcClientRegistration clientRegistrationResponse = readClientRegistrationResponse(mvcResult.getResponse());
+		assertThat(clientRegistrationResponse.getClientId()).isNotNull();
+		assertThat(clientRegistrationResponse.getClientIdIssuedAt()).isNotNull();
+		assertThat(clientRegistrationResponse.getClientSecret()).isNotNull();
+		assertThat(clientRegistrationResponse.getClientSecretExpiresAt()).isNull();
+		assertThat(clientRegistrationResponse.getClientName()).isEqualTo(clientRegistration.getClientName());
+		assertThat(clientRegistrationResponse.getRedirectUris())
+				.containsExactlyInAnyOrderElementsOf(clientRegistration.getRedirectUris());
+		assertThat(clientRegistrationResponse.getGrantTypes())
+				.containsExactlyInAnyOrderElementsOf(clientRegistration.getGrantTypes());
+		assertThat(clientRegistrationResponse.getResponseTypes())
+				.containsExactly(OAuth2AuthorizationResponseType.CODE.getValue());
+		assertThat(clientRegistrationResponse.getScopes())
+				.containsExactlyInAnyOrderElementsOf(clientRegistration.getScopes());
+		assertThat(clientRegistrationResponse.getTokenEndpointAuthenticationMethod())
+				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
+		assertThat(clientRegistrationResponse.getIdTokenSignedResponseAlgorithm())
+				.isEqualTo(SignatureAlgorithm.RS256.getName());
 	}
 
 	private static String encodeBasicAuth(String clientId, String secret) throws Exception {
@@ -194,12 +200,22 @@ public class OidcClientRegistrationTests {
 		return new String(encodedBytes, StandardCharsets.UTF_8);
 	}
 
-	private static byte[] convertToByteArray(OidcClientRegistration clientRegistration) throws JsonProcessingException {
-		ObjectMapper objectMapper = new ObjectMapper();
+	private static OAuth2AccessTokenResponse readAccessTokenResponse(MockHttpServletResponse response) throws Exception {
+		MockClientHttpResponse httpResponse = new MockClientHttpResponse(
+				response.getContentAsByteArray(), HttpStatus.valueOf(response.getStatus()));
+		return accessTokenHttpResponseConverter.read(OAuth2AccessTokenResponse.class, httpResponse);
+	}
 
-		return objectMapper
-				.writerFor(Map.class)
-				.writeValueAsBytes(clientRegistration.getClaims());
+	private static byte[] getClientRegistrationRequestContent(OidcClientRegistration clientRegistration) throws Exception {
+		MockHttpOutputMessage httpRequest = new MockHttpOutputMessage();
+		clientRegistrationHttpMessageConverter.write(clientRegistration, null, httpRequest);
+		return httpRequest.getBodyAsBytes();
+	}
+
+	private static OidcClientRegistration readClientRegistrationResponse(MockHttpServletResponse response) throws Exception {
+		MockClientHttpResponse httpResponse = new MockClientHttpResponse(
+				response.getContentAsByteArray(), HttpStatus.valueOf(response.getStatus()));
+		return clientRegistrationHttpMessageConverter.read(OidcClientRegistration.class, httpResponse);
 	}
 
 	@EnableWebSecurity
@@ -221,21 +237,5 @@ public class OidcClientRegistrationTests {
 			return jwkSource;
 		}
 
-
-	}
-
-	@EnableWebSecurity
-	@Import(OAuth2AuthorizationServerConfiguration.class)
-	static class AuthorizationServerConfigurationEnabledClientRegistration extends AuthorizationServerConfiguration{
-
-		@Bean
-		JwtDecoder jwtDecoder() {
-			return jwtDecoder;
-		}
-
-		@Bean
-		ProviderSettings providerSettings() {
-			return new ProviderSettings().isOidClientRegistrationEndpointEnabled(true);
-		}
 	}
 }

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

@@ -54,10 +54,8 @@ import org.springframework.security.oauth2.core.http.converter.OAuth2AccessToken
 import org.springframework.security.oauth2.core.oidc.OidcScopes;
 import org.springframework.security.oauth2.core.oidc.endpoint.OidcParameterNames;
 import org.springframework.security.oauth2.jose.TestJwks;
-import org.springframework.security.oauth2.jose.TestKeys;
 import org.springframework.security.oauth2.jwt.Jwt;
 import org.springframework.security.oauth2.jwt.JwtDecoder;
-import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
 import org.springframework.security.oauth2.server.authorization.JwtEncodingContext;
 import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
 import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationCode;
@@ -105,7 +103,6 @@ public class OidcTests {
 	private static RegisteredClientRepository registeredClientRepository;
 	private static OAuth2AuthorizationService authorizationService;
 	private static JWKSource<SecurityContext> jwkSource;
-	private static NimbusJwtDecoder jwtDecoder;
 	private static HttpMessageConverter<OAuth2AccessTokenResponse> accessTokenHttpResponseConverter =
 			new OAuth2AccessTokenResponseHttpMessageConverter();
 
@@ -115,13 +112,15 @@ public class OidcTests {
 	@Autowired
 	private MockMvc mvc;
 
+	@Autowired
+	private JwtDecoder jwtDecoder;
+
 	@BeforeClass
 	public static void init() {
 		registeredClientRepository = mock(RegisteredClientRepository.class);
 		authorizationService = mock(OAuth2AuthorizationService.class);
 		JWKSet jwkSet = new JWKSet(TestJwks.DEFAULT_RSA_JWK);
 		jwkSource = (jwkSelector, securityContext) -> jwkSelector.select(jwkSet);
-		jwtDecoder = NimbusJwtDecoder.withPublicKey(TestKeys.DEFAULT_PUBLIC_KEY).build();
 	}
 
 	@Before
@@ -206,7 +205,7 @@ public class OidcTests {
 		OAuth2AccessTokenResponse accessTokenResponse = accessTokenHttpResponseConverter.read(OAuth2AccessTokenResponse.class, httpResponse);
 
 		// Assert user authorities was propagated as claim in ID Token
-		Jwt idToken = jwtDecoder.decode((String) accessTokenResponse.getAdditionalParameters().get(OidcParameterNames.ID_TOKEN));
+		Jwt idToken = this.jwtDecoder.decode((String) accessTokenResponse.getAdditionalParameters().get(OidcParameterNames.ID_TOKEN));
 		List<String> authoritiesClaim = idToken.getClaim(AUTHORITIES_CLAIM);
 		Authentication principal = authorization.getAttribute(Principal.class.getName());
 		Set<String> userAuthorities = principal.getAuthorities().stream()
@@ -275,10 +274,6 @@ public class OidcTests {
 			};
 		}
 
-		@Bean
-		JwtDecoder jwtDecoder(){
-			return jwtDecoder;
-		}
 	}
 
 	@EnableWebSecurity

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/core/oidc/OidcClientRegistrationTests.java

@@ -15,317 +15,384 @@
  */
 package org.springframework.security.oauth2.core.oidc;
 
-import org.junit.Test;
-import org.springframework.security.oauth2.core.AuthorizationGrantType;
-import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
-import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
-
-import java.net.URL;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+
+import org.junit.Test;
+
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 
 /**
- * Tests for {@link OidcClientRegistration}
+ * Tests for {@link OidcClientRegistration}.
  *
  * @author Ovidiu Popa
- * @since 0.1.1
+ * @author Joe Grandja
  */
 public class OidcClientRegistrationTests {
-
-	private final OidcClientRegistration.Builder clientRegistrationBuilder =
-			OidcClientRegistration.builder();
+	// @formatter:off
+	private final OidcClientRegistration.Builder minimalBuilder =
+			OidcClientRegistration.builder()
+					.redirectUri("https://client.example.com");
+	// @formatter:on
 
 	@Test
-	public void buildWhenAllRequiredClaimsAndAdditionalClaimsThenCreated() {
+	public void buildWhenAllClaimsProvidedThenCreated() {
+		// @formatter:off
+		Instant clientIdIssuedAt = Instant.now();
+		Instant clientSecretExpiresAt = clientIdIssuedAt.plus(30, ChronoUnit.DAYS);
 		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
+				.clientId("client-id")
+				.clientIdIssuedAt(clientIdIssuedAt)
+				.clientSecret("client-secret")
+				.clientSecretExpiresAt(clientSecretExpiresAt)
+				.clientName("client-name")
+				.redirectUri("https://client.example.com")
+				.tokenEndpointAuthenticationMethod(ClientAuthenticationMethod.BASIC.getValue())
 				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
 				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
 				.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
-				.scope("test read")
-				.tokenEndpointAuthenticationMethod(ClientAuthenticationMethod.BASIC.getValue())
+				.scope("scope1")
+				.scope("scope2")
+				.idTokenSignedResponseAlgorithm(SignatureAlgorithm.RS256.getName())
+				.claim("a-claim", "a-value")
 				.build();
+		// @formatter:on
 
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.contains(
-						AuthorizationGrantType.AUTHORIZATION_CODE.getValue(),
-						AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()
-				);
-		assertThat(clientRegistration.getResponseTypes())
-				.contains(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(clientRegistration.getScope())
-				.isEqualTo("test read");
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
-
+		assertThat(clientRegistration.getClientId()).isEqualTo("client-id");
+		assertThat(clientRegistration.getClientIdIssuedAt()).isEqualTo(clientIdIssuedAt);
+		assertThat(clientRegistration.getClientSecret()).isEqualTo("client-secret");
+		assertThat(clientRegistration.getClientSecretExpiresAt()).isEqualTo(clientSecretExpiresAt);
+		assertThat(clientRegistration.getClientName()).isEqualTo("client-name");
+		assertThat(clientRegistration.getRedirectUris()).containsOnly("https://client.example.com");
+		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod()).isEqualTo("basic");
+		assertThat(clientRegistration.getGrantTypes()).containsExactlyInAnyOrder("authorization_code", "client_credentials");
+		assertThat(clientRegistration.getResponseTypes()).containsOnly("code");
+		assertThat(clientRegistration.getScopes()).containsExactlyInAnyOrder("scope1", "scope2");
+		assertThat(clientRegistration.getIdTokenSignedResponseAlgorithm()).isEqualTo("RS256");
+		assertThat(clientRegistration.getClaimAsString("a-claim")).isEqualTo("a-value");
 	}
 
 	@Test
-	public void buildWhenAllRequiredClaimsThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.containsOnly(AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
-		assertThat(clientRegistration.getResponseTypes())
-				.containsOnly(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(clientRegistration.getScope())
-				.isNull();
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
+	public void buildWhenOnlyRequiredClaimsProvidedThenCreated() {
+		OidcClientRegistration clientRegistration = this.minimalBuilder.build();
+		assertThat(clientRegistration.getRedirectUris()).containsOnly("https://client.example.com");
 	}
 
 	@Test
-	public void buildWhenAllRequiredClaimsAndAuthorizationGrantTypeButMissingResponseTypeThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.containsOnly(AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
-		assertThat(clientRegistration.getResponseTypes())
-				.containsOnly(OAuth2AuthorizationResponseType.CODE.getValue());
-	}
-
-	@Test
-	public void buildWhenAllRequiredClaimsAndEmptyGrantTypeListButMissingResponseTypeThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.grantTypes(List::clear)
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.containsOnly(AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
-		assertThat(clientRegistration.getResponseTypes())
-				.containsOnly(OAuth2AuthorizationResponseType.CODE.getValue());
-	}
-
-	@Test
-	public void buildWhenAllRequiredClaimsAndResponseTypeButMissingAuthorizationGrantTypeThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.containsOnly(AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
-		assertThat(clientRegistration.getResponseTypes())
-				.containsOnly(OAuth2AuthorizationResponseType.CODE.getValue());
-	}
-
-	@Test
-	public void buildWhenAllRequiredClaimsAndEmptyResponseTypeListButMissingAuthorizationGrantTypeThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.responseTypes(List::clear)
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.containsOnly(AuthorizationGrantType.AUTHORIZATION_CODE.getValue());
-		assertThat(clientRegistration.getResponseTypes())
-				.containsOnly(OAuth2AuthorizationResponseType.CODE.getValue());
-	}
-
-	@Test
-	public void buildWhenAllRequiredClaimsAndEmptyScopeThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getScope())
-				.isNull();
-	}
-
-	@Test
-	public void buildWhenAllRequiredClaimsAndEmptyTokenEndpointAuthMethodThenCreated() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com")
-				.build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
-	}
-
-	@Test
-	public void buildWhenClaimsProvidedThenCreated() {
-		Map<String, Object> claims = new HashMap<>();
-		claims.put(OidcClientMetadataClaimNames.REDIRECT_URIS, Collections.singletonList("http://client.example.com"));
-		claims.put(OidcClientMetadataClaimNames.GRANT_TYPES, Arrays.asList(
-				AuthorizationGrantType.AUTHORIZATION_CODE.getValue(),
-				AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()
-		));
-		claims.put(OidcClientMetadataClaimNames.RESPONSE_TYPES,
-				Collections.singletonList(OAuth2AuthorizationResponseType.CODE.getValue()));
-		claims.put(OidcClientMetadataClaimNames.SCOPE, "test read");
+	public void withClaimsWhenClaimsProvidedThenCreated() {
+		Instant clientIdIssuedAt = Instant.now();
+		Instant clientSecretExpiresAt = clientIdIssuedAt.plus(30, ChronoUnit.DAYS);
+		HashMap<String, Object> claims = new HashMap<>();
+		claims.put(OidcClientMetadataClaimNames.CLIENT_ID, "client-id");
+		claims.put(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, clientIdIssuedAt);
+		claims.put(OidcClientMetadataClaimNames.CLIENT_SECRET, "client-secret");
+		claims.put(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, clientSecretExpiresAt);
+		claims.put(OidcClientMetadataClaimNames.CLIENT_NAME, "client-name");
+		claims.put(OidcClientMetadataClaimNames.REDIRECT_URIS, Collections.singletonList("https://client.example.com"));
 		claims.put(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, ClientAuthenticationMethod.BASIC.getValue());
+		claims.put(OidcClientMetadataClaimNames.GRANT_TYPES, Arrays.asList(
+				AuthorizationGrantType.AUTHORIZATION_CODE.getValue(), AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()));
+		claims.put(OidcClientMetadataClaimNames.RESPONSE_TYPES, Collections.singletonList("code"));
+		claims.put(OidcClientMetadataClaimNames.SCOPE, Arrays.asList("scope1", "scope2"));
+		claims.put(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG, SignatureAlgorithm.RS256.getName());
+		claims.put("a-claim", "a-value");
 
 		OidcClientRegistration clientRegistration = OidcClientRegistration.withClaims(claims).build();
 
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("http://client.example.com");
-		assertThat(clientRegistration.getGrantTypes())
-				.contains(
-						AuthorizationGrantType.AUTHORIZATION_CODE.getValue(),
-						AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()
-				);
-		assertThat(clientRegistration.getResponseTypes())
-				.contains(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(clientRegistration.getScope())
-				.isEqualTo("test read");
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
+		assertThat(clientRegistration.getClientId()).isEqualTo("client-id");
+		assertThat(clientRegistration.getClientIdIssuedAt()).isEqualTo(clientIdIssuedAt);
+		assertThat(clientRegistration.getClientSecret()).isEqualTo("client-secret");
+		assertThat(clientRegistration.getClientSecretExpiresAt()).isEqualTo(clientSecretExpiresAt);
+		assertThat(clientRegistration.getClientName()).isEqualTo("client-name");
+		assertThat(clientRegistration.getRedirectUris()).containsOnly("https://client.example.com");
+		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod()).isEqualTo("basic");
+		assertThat(clientRegistration.getGrantTypes()).containsExactlyInAnyOrder("authorization_code", "client_credentials");
+		assertThat(clientRegistration.getResponseTypes()).containsOnly("code");
+		assertThat(clientRegistration.getScopes()).containsExactlyInAnyOrder("scope1", "scope2");
+		assertThat(clientRegistration.getIdTokenSignedResponseAlgorithm()).isEqualTo("RS256");
+		assertThat(clientRegistration.getClaimAsString("a-claim")).isEqualTo("a-value");
 	}
 
 	@Test
-	public void buildWhenRedirectUriProvidedWithUrlThenCreated() {
-		Map<String, Object> claims = new HashMap<>();
-		claims.put(OidcClientMetadataClaimNames.REDIRECT_URIS, Arrays.asList(
-				url("http://client.example.com"),
-				url("http://client.example.com/authorized")
-				)
-		);
-		claims.put(OidcClientMetadataClaimNames.GRANT_TYPES, Arrays.asList(
-				AuthorizationGrantType.AUTHORIZATION_CODE.getValue(),
-				AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()
-		));
-		claims.put(OidcClientMetadataClaimNames.RESPONSE_TYPES,
-				Collections.singletonList(OAuth2AuthorizationResponseType.CODE.getValue()));
-		claims.put(OidcClientMetadataClaimNames.SCOPE, "test read");
-		claims.put(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, ClientAuthenticationMethod.BASIC.getValue());
-
-		OidcClientRegistration clientRegistration = OidcClientRegistration.withClaims(claims).build();
-
-		assertThat(clientRegistration.getRedirectUris())
-				.contains("http://client.example.com", "http://client.example.com/authorized");
-		assertThat(clientRegistration.getGrantTypes())
-				.contains(
-						AuthorizationGrantType.AUTHORIZATION_CODE.getValue(),
-						AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()
-				);
-		assertThat(clientRegistration.getResponseTypes())
-				.contains(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(clientRegistration.getScope())
-				.isEqualTo("test read");
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
+	public void withClaimsWhenNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> OidcClientRegistration.withClaims(null))
+				.withMessage("claims cannot be empty");
 	}
 
 	@Test
-	public void withClaimsNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> OidcClientRegistration.withClaims(null))
-				.isInstanceOf(IllegalArgumentException.class);
+	public void withClaimsWhenEmptyThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> OidcClientRegistration.withClaims(Collections.emptyMap()))
+				.withMessage("claims cannot be empty");
 	}
 
 	@Test
-	public void withClaimsEmptyThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> OidcClientRegistration.withClaims(Collections.emptyMap()))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("claims cannot be empty");
+	public void buildWhenMissingClientIdThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.clientIdIssuedAt(Instant.now());
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("client_id cannot be null");
 	}
 
 	@Test
-	public void buildWhenNullRedirectUriThenThrowIllegalArgumentException() {
-		OidcClientRegistration.Builder builder = this.clientRegistrationBuilder
-				.redirectUris((claims) -> claims.remove(OidcClientMetadataClaimNames.REDIRECT_URIS));
+	public void buildWhenClientSecretAndMissingClientIdThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.clientSecret("client-secret");
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("redirect_uris must not be empty");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("client_id cannot be null");
 	}
 
 	@Test
-	public void buildWhenNullRedirectUriClaimThenThrowIllegalArgumentException() {
-		Map<String, Object> claims = new HashMap<>();
-		claims.put(OidcClientMetadataClaimNames.REDIRECT_URIS, null);
-		OidcClientRegistration.Builder builder = OidcClientRegistration.withClaims(claims);
+	public void buildWhenClientIdIssuedAtNotInstantThenThrowIllegalArgumentException() {
+		// @formatter:off
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.clientId("client-id")
+				.claim(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, "clientIdIssuedAt");
+		// @formatter:on
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("redirect_uris cannot be null");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessageStartingWith("client_id_issued_at must be of type Instant");
 	}
 
 	@Test
-	public void buildWhenEmptyRedirectUriListThenThrowIllegalArgumentException() {
-		OidcClientRegistration.Builder builder = this.clientRegistrationBuilder
-				.redirectUris(List::clear);
+	public void buildWhenMissingClientSecretThenThrowIllegalArgumentException() {
+		// @formatter:off
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.clientId("client-id")
+				.clientIdIssuedAt(Instant.now())
+				.clientSecretExpiresAt(Instant.now().plus(30, ChronoUnit.DAYS));
+		// @formatter:on
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("redirect_uris must not be empty");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("client_secret cannot be null");
 	}
 
 	@Test
-	public void buildWhenRedirectUriNotOfTypeListThenThrowIllegalArgumentException() {
-		OidcClientRegistration.Builder builder = this.clientRegistrationBuilder
-				.claims(claims -> claims.put(OidcClientMetadataClaimNames.REDIRECT_URIS, "http://client.example.com"));
+	public void buildWhenClientSecretExpiresAtNotInstantThenThrowIllegalArgumentException() {
+		// @formatter:off
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.clientId("client-id")
+				.clientIdIssuedAt(Instant.now())
+				.clientSecret("client-secret")
+				.claim(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, "clientSecretExpiresAt");
+		// @formatter:on
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessageContaining("redirect_uris must be of type list");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessageStartingWith("client_secret_expires_at must be of type Instant");
 	}
 
 	@Test
-	public void buildWhenRedirectUriNotUrlThenThrowIllegalArgumentException() {
-		OidcClientRegistration.Builder builder = this.clientRegistrationBuilder
-				.redirectUri("not url");
+	public void buildWhenMissingRedirectUrisThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = OidcClientRegistration.builder()
+				.clientName("client-name");
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("redirect_uri must be a valid URL");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("redirect_uris cannot be null");
 	}
 
 	@Test
-	public void buildWhenResponseTypesNotOfTypeListThenThrowIllegalArgumentException() {
-		OidcClientRegistration.Builder builder = this.clientRegistrationBuilder
-				.redirectUri("http://client.example.com")
-				.claims(claims -> claims.put(OidcClientMetadataClaimNames.RESPONSE_TYPES, OAuth2AuthorizationResponseType.CODE.getValue()));
+	public void buildWhenRedirectUrisNotListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = OidcClientRegistration.builder()
+				.claim(OidcClientMetadataClaimNames.REDIRECT_URIS, "redirectUris");
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessageContaining("response_types must be of type List");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessageStartingWith("redirect_uris must be of type List");
 	}
 
 	@Test
-	public void buildWhenGrantTypesNotOfTypeListThenThrowIllegalArgumentException() {
-		OidcClientRegistration.Builder builder = this.clientRegistrationBuilder
-				.redirectUri("http://client.example.com")
-				.claims(claims -> claims.put(OidcClientMetadataClaimNames.GRANT_TYPES, AuthorizationGrantType.AUTHORIZATION_CODE.getValue()));
+	public void buildWhenRedirectUrisEmptyListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = OidcClientRegistration.builder()
+				.claim(OidcClientMetadataClaimNames.REDIRECT_URIS, Collections.emptyList());
 
-		assertThatThrownBy(builder::build)
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessageContaining("grant_types must be of type List");
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("redirect_uris cannot be empty");
 	}
 
-	private static URL url(String urlString) {
-		try {
-			return new URL(urlString);
-		} catch (Exception ex) {
-			throw new IllegalArgumentException("urlString must be a valid URL and valid URI");
-		}
+	@Test
+	public void buildWhenInvalidRedirectUriThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = OidcClientRegistration.builder()
+				.redirectUri("invalid-uri");
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("redirect_uri must be a valid URL");
+	}
+
+	@Test
+	public void buildWhenRedirectUrisAddingOrRemovingThenCorrectValues() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = this.minimalBuilder
+				.redirectUri("https://client1.example.com")
+				.redirectUris(redirectUris -> {
+					redirectUris.clear();
+					redirectUris.add("https://client2.example.com");
+				})
+				.build();
+		// @formatter:on
+
+		assertThat(clientRegistration.getRedirectUris()).containsExactly("https://client2.example.com");
+	}
+
+	@Test
+	public void buildWhenGrantTypesNotListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.claim(OidcClientMetadataClaimNames.GRANT_TYPES, "grantTypes");
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessageStartingWith("grant_types must be of type List");
+	}
+
+	@Test
+	public void buildWhenGrantTypesEmptyListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.claim(OidcClientMetadataClaimNames.GRANT_TYPES, Collections.emptyList());
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("grant_types cannot be empty");
+	}
+
+	@Test
+	public void buildWhenGrantTypesAddingOrRemovingThenCorrectValues() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = this.minimalBuilder
+				.grantType("authorization_code")
+				.grantTypes(grantTypes -> {
+					grantTypes.clear();
+					grantTypes.add("client_credentials");
+				})
+				.build();
+		// @formatter:on
+
+		assertThat(clientRegistration.getGrantTypes()).containsExactly("client_credentials");
+	}
+
+	@Test
+	public void buildWhenResponseTypesNotListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.claim(OidcClientMetadataClaimNames.RESPONSE_TYPES, "responseTypes");
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessageStartingWith("response_types must be of type List");
+	}
+
+	@Test
+	public void buildWhenResponseTypesEmptyListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.claim(OidcClientMetadataClaimNames.RESPONSE_TYPES, Collections.emptyList());
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("response_types cannot be empty");
+	}
+
+	@Test
+	public void buildWhenResponseTypesAddingOrRemovingThenCorrectValues() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = this.minimalBuilder
+				.responseType("token")
+				.responseTypes(responseTypes -> {
+					responseTypes.clear();
+					responseTypes.add("code");
+				})
+				.build();
+		// @formatter:on
+
+		assertThat(clientRegistration.getResponseTypes()).containsExactly("code");
+	}
+
+	@Test
+	public void buildWhenScopesNotListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.claim(OidcClientMetadataClaimNames.SCOPE, "scopes");
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessageStartingWith("scope must be of type List");
+	}
+
+	@Test
+	public void buildWhenScopesEmptyListThenThrowIllegalArgumentException() {
+		OidcClientRegistration.Builder builder = this.minimalBuilder
+				.claim(OidcClientMetadataClaimNames.SCOPE, Collections.emptyList());
+
+		assertThatIllegalArgumentException()
+				.isThrownBy(builder::build)
+				.withMessage("scope cannot be empty");
+	}
+
+	@Test
+	public void buildWhenScopesAddingOrRemovingThenCorrectValues() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = this.minimalBuilder
+				.scope("should-be-removed")
+				.scopes(scopes -> {
+					scopes.clear();
+					scopes.add("scope1");
+				})
+				.build();
+		// @formatter:on
+
+		assertThat(clientRegistration.getScopes()).containsExactly("scope1");
+	}
+
+	@Test
+	public void claimWhenNameNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> OidcClientRegistration.builder().claim(null, "claim-value"))
+				.withMessage("name cannot be empty");
+	}
+
+	@Test
+	public void claimWhenValueNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> OidcClientRegistration.builder().claim("claim-name", null))
+				.withMessage("value cannot be null");
+	}
+
+	@Test
+	public void claimsWhenRemovingClaimThenNotPresent() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = this.minimalBuilder
+				.claim("claim-name", "claim-value")
+				.claims((claims) -> claims.remove("claim-name"))
+				.build();
+		// @formatter:on
+
+		assertThat(clientRegistration.containsClaim("claim-name")).isFalse();
+	}
+
+	@Test
+	public void claimsWhenAddingClaimThenPresent() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = this.minimalBuilder
+				.claim("claim-name", "claim-value")
+				.build();
+		// @formatter:on
+
+		assertThat(clientRegistration.containsClaim("claim-name")).isTrue();
 	}
 
 }

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/core/oidc/http/converter/OidcClientRegistrationHttpMessageConverterTest.java

@@ -1,197 +0,0 @@
-/*
- * Copyright 2020-2021 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
- *
- *      https://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.security.oauth2.core.oidc.http.converter;
-
-import org.junit.Test;
-import org.springframework.core.convert.converter.Converter;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.converter.HttpMessageNotReadableException;
-import org.springframework.http.converter.HttpMessageNotWritableException;
-import org.springframework.mock.http.MockHttpOutputMessage;
-import org.springframework.mock.http.client.MockClientHttpResponse;
-import org.springframework.security.oauth2.core.AuthorizationGrantType;
-import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
-import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
-import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
-
-import java.util.Map;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
-import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
-
-/**
- * @author Ovidiu Popa
- * @since 0.1.1
- */
-public class OidcClientRegistrationHttpMessageConverterTest {
-	private final OidcClientRegistrationHttpMessageConverter messageConverter =
-			new OidcClientRegistrationHttpMessageConverter();
-
-	@Test
-	public void supportsWhenOidcClientRegistrationThenTrue() {
-		assertThat(this.messageConverter.supports(OidcClientRegistration.class)).isTrue();
-	}
-
-	@Test
-	public void setClientRegistrationReadConverterWhenNullThenThrowIllegalArgumentException() {
-		assertThatIllegalArgumentException()
-				.isThrownBy(() -> this.messageConverter.setClientRegistrationConverter(null))
-				.withMessageContaining("clientRegistrationConverter cannot be null");
-	}
-
-	@Test
-	public void setClientRegistrationWriteConverterWhenNullThenThrowIllegalArgumentException() {
-		assertThatIllegalArgumentException()
-				.isThrownBy(() -> this.messageConverter.setClientRegistrationParametersConverter(null))
-				.withMessageContaining("clientRegistrationParametersConverter cannot be null");
-	}
-
-	@Test
-	public void readInternalWhenRequiredParametersThenSuccess() {
-		// @formatter:off
-		String clientRegistrationResponse = "{\n"
-				+ "		\"redirect_uris\": [\n"
-				+ "			\"https://client.example.org/callback\"\n"
-				+ "		]\n"
-				+ "}\n";
-		// @formatter:on
-
-		MockClientHttpResponse response = new MockClientHttpResponse(clientRegistrationResponse.getBytes(), HttpStatus.OK);
-		OidcClientRegistration clientRegistration = this.messageConverter
-				.readInternal(OidcClientRegistration.class, response);
-
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("https://client.example.org/callback");
-		assertThat(clientRegistration.getGrantTypes())
-				.containsOnly(
-						AuthorizationGrantType.AUTHORIZATION_CODE.getValue()
-				);
-		assertThat(clientRegistration.getResponseTypes())
-				.contains(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(clientRegistration.getScope())
-				.isNull();
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
-	}
-
-	@Test
-	public void readInternalWhenValidParametersThenSuccess() {
-		// @formatter:off
-		String clientRegistrationResponse = "{\n"
-				+"		\"redirect_uris\": [\n"
-				+ "			\"https://client.example.org/callback\"\n"
-				+ "		],\n"
-				+"		\"grant_types\": [\n"
-				+"			\"client_credentials\",\n"
-				+"			\"authorization_code\"\n"
-				+"		],\n"
-				+"		\"response_types\":[\n"
-				+"			\"code\"\n"
-				+"		],\n"
-				+"		\"client_name\": \"My Example\",\n"
-				+"		\"scope\": \"read write\",\n"
-				+"		\"token_endpoint_auth_method\": \"basic\"\n"
-				+"}\n";
-		// @formatter:on
-		MockClientHttpResponse response = new MockClientHttpResponse(clientRegistrationResponse.getBytes(), HttpStatus.OK);
-
-		OidcClientRegistration clientRegistration = this.messageConverter
-				.readInternal(OidcClientRegistration.class, response);
-		assertThat(clientRegistration.getRedirectUris())
-				.containsOnly("https://client.example.org/callback");
-		assertThat(clientRegistration.getGrantTypes())
-				.contains(
-						AuthorizationGrantType.AUTHORIZATION_CODE.getValue(),
-						AuthorizationGrantType.CLIENT_CREDENTIALS.getValue()
-				);
-		assertThat(clientRegistration.getResponseTypes())
-				.contains(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat(clientRegistration.getScope())
-				.isEqualTo("read write");
-		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod())
-				.isEqualTo(ClientAuthenticationMethod.BASIC.getValue());
-	}
-
-	@Test
-	public void readInternalWhenFailingConverterThenThrowException() {
-		String errorMessage = "this is not a valid converter";
-		this.messageConverter.setClientRegistrationConverter(source -> {
-			throw new RuntimeException(errorMessage);
-		});
-		MockClientHttpResponse response = new MockClientHttpResponse("{}".getBytes(), HttpStatus.OK);
-
-		assertThatExceptionOfType(HttpMessageNotReadableException.class)
-				.isThrownBy(() -> this.messageConverter.readInternal(OidcClientRegistration.class, response))
-				.withMessageContaining("An error occurred reading the OpenID Client Registration Request")
-				.withMessageContaining(errorMessage);
-	}
-
-	@Test
-	public void readInternalWhenInvalidClientRegistrationThenThrowException() {
-		String clientRegistrationResponse = "{ \"redirect_uris\": null }";
-		MockClientHttpResponse response = new MockClientHttpResponse(clientRegistrationResponse.getBytes(), HttpStatus.OK);
-
-		assertThatExceptionOfType(HttpMessageNotReadableException.class)
-				.isThrownBy(() -> this.messageConverter.readInternal(OidcClientRegistration.class, response))
-				.withMessageContaining("An error occurred reading the OpenID Client Registration Request")
-				.withMessageContaining("redirect_uris cannot be null");
-	}
-
-	@Test
-	public void writeInternalWhenClientRegistrationThenSuccess() {
-		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
-				.redirectUri("http://client.example.com/callback")
-				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
-				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
-				.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
-				.scope("test read")
-				.tokenEndpointAuthenticationMethod(ClientAuthenticationMethod.BASIC.getValue())
-				.build();
-		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
-
-		this.messageConverter.writeInternal(clientRegistration, outputMessage);
-		String clientRegistrationResponse = outputMessage.getBodyAsString();
-		assertThat(clientRegistrationResponse).contains("\"redirect_uris\":[\"http://client.example.com/callback\"]");
-		assertThat(clientRegistrationResponse).contains("\"grant_types\":[\"authorization_code\",\"client_credentials\"]");
-		assertThat(clientRegistrationResponse).contains("\"response_types\":[\"code\"]");
-		assertThat(clientRegistrationResponse).contains("\"scope\":\"test read\"");
-		assertThat(clientRegistrationResponse).contains("\"token_endpoint_auth_method\":\"basic\"");
-	}
-
-	@Test
-	public void writeInternalWhenWriteFailsThenThrowsException() {
-		String errorMessage = "this is not a valid converter";
-		Converter<OidcClientRegistration, Map<String, Object>> failingConverter =
-				source -> {
-					throw new RuntimeException(errorMessage);
-				};
-		this.messageConverter.setClientRegistrationParametersConverter(failingConverter);
-
-		OidcClientRegistration clientRegistration =
-				OidcClientRegistration.builder()
-						.redirectUri("http://client.example.com")
-						.build();
-
-		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
-
-		assertThatThrownBy(() -> this.messageConverter.writeInternal(clientRegistration, outputMessage))
-				.isInstanceOf(HttpMessageNotWritableException.class)
-				.hasMessageContaining("An error occurred writing the OpenID Client Registration response")
-				.hasMessageContaining(errorMessage);
-	}
-}

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/core/oidc/http/converter/OidcClientRegistrationHttpMessageConverterTests.java

@@ -0,0 +1,250 @@
+/*
+ * Copyright 2020-2021 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
+ *
+ *      https://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.security.oauth2.core.oidc.http.converter;
+
+import java.time.Instant;
+import java.util.Map;
+
+import org.junit.Test;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.mock.http.MockHttpOutputMessage;
+import org.springframework.mock.http.client.MockClientHttpResponse;
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+/**
+ * Tests for {@link OidcClientRegistrationHttpMessageConverter}
+
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
+ */
+public class OidcClientRegistrationHttpMessageConverterTests {
+	private final OidcClientRegistrationHttpMessageConverter messageConverter = new OidcClientRegistrationHttpMessageConverter();
+
+	@Test
+	public void supportsWhenOidcClientRegistrationThenTrue() {
+		assertThat(this.messageConverter.supports(OidcClientRegistration.class)).isTrue();
+	}
+
+	@Test
+	public void setClientRegistrationConverterWhenNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.messageConverter.setClientRegistrationConverter(null))
+				.withMessageContaining("clientRegistrationConverter cannot be null");
+	}
+
+	@Test
+	public void setClientRegistrationParametersConverterWhenNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.messageConverter.setClientRegistrationParametersConverter(null))
+				.withMessageContaining("clientRegistrationParametersConverter cannot be null");
+	}
+
+	@Test
+	public void readInternalWhenRequiredParametersThenSuccess() {
+		// @formatter:off
+		String clientRegistrationRequest = "{\n"
+				+ "		\"redirect_uris\": [\n"
+				+ "			\"https://client.example.com\"\n"
+				+ "		]\n"
+				+ "}\n";
+		// @formatter:on
+
+		MockClientHttpResponse response = new MockClientHttpResponse(
+				clientRegistrationRequest.getBytes(), HttpStatus.OK);
+		OidcClientRegistration clientRegistration = this.messageConverter
+				.readInternal(OidcClientRegistration.class, response);
+
+		assertThat(clientRegistration.getClaims()).hasSize(1);
+		assertThat(clientRegistration.getRedirectUris()).containsOnly("https://client.example.com");
+	}
+
+	@Test
+	public void readInternalWhenValidParametersThenSuccess() {
+		// @formatter:off
+		String clientRegistrationRequest = "{\n"
+				+"		\"client_id\": \"client-id\",\n"
+				+"		\"client_id_issued_at\": 1607633867,\n"
+				+"		\"client_secret\": \"client-secret\",\n"
+				+"		\"client_secret_expires_at\": 1607637467,\n"
+				+"		\"client_name\": \"client-name\",\n"
+				+"		\"redirect_uris\": [\n"
+				+ "			\"https://client.example.com\"\n"
+				+ "		],\n"
+				+"		\"token_endpoint_auth_method\": \"basic\",\n"
+				+"		\"grant_types\": [\n"
+				+"			\"authorization_code\",\n"
+				+"			\"client_credentials\"\n"
+				+"		],\n"
+				+"		\"response_types\":[\n"
+				+"			\"code\"\n"
+				+"		],\n"
+				+"		\"scope\": \"scope1 scope2\",\n"
+				+"		\"id_token_signed_response_alg\": \"RS256\",\n"
+				+"		\"a-claim\": \"a-value\"\n"
+				+"}\n";
+		// @formatter:on
+		MockClientHttpResponse response = new MockClientHttpResponse(
+				clientRegistrationRequest.getBytes(), HttpStatus.OK);
+		OidcClientRegistration clientRegistration = this.messageConverter
+				.readInternal(OidcClientRegistration.class, response);
+
+		assertThat(clientRegistration.getClientId()).isEqualTo("client-id");
+		assertThat(clientRegistration.getClientIdIssuedAt()).isEqualTo(Instant.ofEpochSecond(1607633867L));
+		assertThat(clientRegistration.getClientSecret()).isEqualTo("client-secret");
+		assertThat(clientRegistration.getClientSecretExpiresAt()).isEqualTo(Instant.ofEpochSecond(1607637467L));
+		assertThat(clientRegistration.getClientName()).isEqualTo("client-name");
+		assertThat(clientRegistration.getRedirectUris()).containsOnly("https://client.example.com");
+		assertThat(clientRegistration.getTokenEndpointAuthenticationMethod()).isEqualTo("basic");
+		assertThat(clientRegistration.getGrantTypes()).containsExactlyInAnyOrder("authorization_code", "client_credentials");
+		assertThat(clientRegistration.getResponseTypes()).containsOnly("code");
+		assertThat(clientRegistration.getScopes()).containsExactlyInAnyOrder("scope1", "scope2");
+		assertThat(clientRegistration.getIdTokenSignedResponseAlgorithm()).isEqualTo("RS256");
+		assertThat(clientRegistration.getClaimAsString("a-claim")).isEqualTo("a-value");
+	}
+
+	@Test
+	public void readInternalWhenClientSecretNoExpiryThenSuccess() {
+		// @formatter:off
+		String clientRegistrationRequest = "{\n"
+				+"		\"client_id\": \"client-id\",\n"
+				+"		\"client_secret\": \"client-secret\",\n"
+				+"		\"client_secret_expires_at\": 0,\n"
+				+"		\"redirect_uris\": [\n"
+				+ "			\"https://client.example.com\"\n"
+				+ "		]\n"
+				+"}\n";
+		// @formatter:on
+		MockClientHttpResponse response = new MockClientHttpResponse(
+				clientRegistrationRequest.getBytes(), HttpStatus.OK);
+		OidcClientRegistration clientRegistration = this.messageConverter
+				.readInternal(OidcClientRegistration.class, response);
+
+		assertThat(clientRegistration.getClaims()).hasSize(3);
+		assertThat(clientRegistration.getClientId()).isEqualTo("client-id");
+		assertThat(clientRegistration.getClientSecret()).isEqualTo("client-secret");
+		assertThat(clientRegistration.getClientSecretExpiresAt()).isNull();
+		assertThat(clientRegistration.getRedirectUris()).containsOnly("https://client.example.com");
+	}
+
+	@Test
+	public void readInternalWhenFailingConverterThenThrowException() {
+		String errorMessage = "this is not a valid converter";
+		this.messageConverter.setClientRegistrationConverter(source -> {
+			throw new RuntimeException(errorMessage);
+		});
+		MockClientHttpResponse response = new MockClientHttpResponse("{}".getBytes(), HttpStatus.OK);
+
+		assertThatExceptionOfType(HttpMessageNotReadableException.class)
+				.isThrownBy(() -> this.messageConverter.readInternal(OidcClientRegistration.class, response))
+				.withMessageContaining("An error occurred reading the OpenID Client Registration")
+				.withMessageContaining(errorMessage);
+	}
+
+	@Test
+	public void writeInternalWhenClientRegistrationThenSuccess() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.clientId("client-id")
+				.clientIdIssuedAt(Instant.ofEpochSecond(1607633867))
+				.clientSecret("client-secret")
+				.clientSecretExpiresAt(Instant.ofEpochSecond(1607637467))
+				.clientName("client-name")
+				.redirectUri("https://client.example.com")
+				.tokenEndpointAuthenticationMethod(ClientAuthenticationMethod.BASIC.getValue())
+				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
+				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
+				.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
+				.scope("scope1")
+				.scope("scope2")
+				.idTokenSignedResponseAlgorithm(SignatureAlgorithm.RS256.getName())
+				.claim("a-claim", "a-value")
+				.build();
+		// @formatter:on
+
+		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
+		this.messageConverter.writeInternal(clientRegistration, outputMessage);
+
+		String clientRegistrationResponse = outputMessage.getBodyAsString();
+		assertThat(clientRegistrationResponse).contains("\"client_id\":\"client-id\"");
+		assertThat(clientRegistrationResponse).contains("\"client_id_issued_at\":1607633867");
+		assertThat(clientRegistrationResponse).contains("\"client_secret\":\"client-secret\"");
+		assertThat(clientRegistrationResponse).contains("\"client_secret_expires_at\":1607637467");
+		assertThat(clientRegistrationResponse).contains("\"client_name\":\"client-name\"");
+		assertThat(clientRegistrationResponse).contains("\"redirect_uris\":[\"https://client.example.com\"]");
+		assertThat(clientRegistrationResponse).contains("\"token_endpoint_auth_method\":\"basic\"");
+		assertThat(clientRegistrationResponse).contains("\"grant_types\":[\"authorization_code\",\"client_credentials\"]");
+		assertThat(clientRegistrationResponse).contains("\"response_types\":[\"code\"]");
+		assertThat(clientRegistrationResponse).contains("\"scope\":\"scope1 scope2\"");
+		assertThat(clientRegistrationResponse).contains("\"id_token_signed_response_alg\":\"RS256\"");
+		assertThat(clientRegistrationResponse).contains("\"a-claim\":\"a-value\"");
+	}
+
+	@Test
+	public void writeInternalWhenClientSecretNoExpiryThenSuccess() {
+		// @formatter:off
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.clientId("client-id")
+				.clientSecret("client-secret")
+				.redirectUri("https://client.example.com")
+				.build();
+		// @formatter:on
+
+		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
+		this.messageConverter.writeInternal(clientRegistration, outputMessage);
+
+		String clientRegistrationResponse = outputMessage.getBodyAsString();
+		assertThat(clientRegistrationResponse).contains("\"client_id\":\"client-id\"");
+		assertThat(clientRegistrationResponse).contains("\"client_secret\":\"client-secret\"");
+		assertThat(clientRegistrationResponse).contains("\"client_secret_expires_at\":0");
+		assertThat(clientRegistrationResponse).contains("\"redirect_uris\":[\"https://client.example.com\"]");
+	}
+
+	@Test
+	public void writeInternalWhenWriteFailsThenThrowException() {
+		String errorMessage = "this is not a valid converter";
+		Converter<OidcClientRegistration, Map<String, Object>> failingConverter = source -> {
+			throw new RuntimeException(errorMessage);
+		};
+		this.messageConverter.setClientRegistrationParametersConverter(failingConverter);
+
+		// @formatter:off
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.redirectUri("https://client.example.com")
+				.build();
+		// @formatter:off
+
+		MockHttpOutputMessage outputMessage = new MockHttpOutputMessage();
+
+		assertThatThrownBy(() -> this.messageConverter.writeInternal(clientRegistration, outputMessage))
+				.isInstanceOf(HttpMessageNotWritableException.class)
+				.hasMessageContaining("An error occurred writing the OpenID Client Registration")
+				.hasMessageContaining(errorMessage);
+	}
+}

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

@@ -1,173 +0,0 @@
-/*
- * Copyright 2020-2021 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
- *
- *      https://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.security.oauth2.server.authorization.authentication;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.mockito.ArgumentCaptor;
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.authority.AuthorityUtils;
-import org.springframework.security.oauth2.core.OAuth2AccessToken;
-import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
-import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
-import org.springframework.security.oauth2.core.OAuth2TokenType;
-import org.springframework.security.oauth2.jwt.Jwt;
-import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
-import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
-import org.springframework.security.oauth2.server.authorization.TestOAuth2Authorizations;
-import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
-
-import java.time.Instant;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
-import static org.mockito.ArgumentMatchers.eq;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-
-/**
- * @author Ovidiu Popa
- * @since 0.1.1
- */
-public class OidcClientRegistrationAuthenticationProviderTests {
-
-	private OAuth2AuthorizationService authorizationService;
-	private OidcClientRegistrationAuthenticationProvider authenticationProvider;
-
-	@Before
-	public void setUp() {
-		this.authorizationService = mock(OAuth2AuthorizationService.class);
-		this.authenticationProvider = new OidcClientRegistrationAuthenticationProvider(this.authorizationService);
-	}
-
-	@Test
-	public void constructorWhenAuthorizationServiceNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> new OidcClientRegistrationAuthenticationProvider(null))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("authorizationService cannot be null");
-	}
-
-	@Test
-	public void supportsWhenTypeJwtAuthenticationTokenThenReturnTrue() {
-		assertThat(this.authenticationProvider.supports(JwtAuthenticationToken.class)).isTrue();
-	}
-
-	@Test
-	public void authenticateWhenAccessTokenNotFoundThenThrowOAuth2AuthenticationException() {
-		JwtAuthenticationToken authentication = buildJwtAuthenticationToken("client-registration-token",  "SCOPE_client.create");
-
-		when(authorizationService.findByToken(
-				eq("client-registration-token"), eq(OAuth2TokenType.ACCESS_TOKEN)))
-				.thenReturn(null);
-
-
-		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
-				.isInstanceOf(OAuth2AuthenticationException.class)
-				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
-				.extracting("errorCode")
-				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
-
-	}
-
-	@Test
-	public void authenticateWhenAccessTokenInvalidatedThenThrowOAuth2AuthenticationException() {
-
-		JwtAuthenticationToken authentication = buildJwtAuthenticationToken("client-registration-token",  "SCOPE_client.create");
-
-		OAuth2AccessToken accessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER,
-				"client-registration-token", Instant.now().minusSeconds(120), Instant.now().plusSeconds(1000));
-
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization()
-				.token(accessToken, (metadata) -> metadata.put(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME, true))
-				.build();
-
-		when(authorizationService.findByToken(
-				eq("client-registration-token"), eq(OAuth2TokenType.ACCESS_TOKEN)))
-				.thenReturn(authorization);
-
-		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
-				.isInstanceOf(OAuth2AuthenticationException.class)
-				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
-				.extracting("errorCode")
-				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
-	}
-
-	@Test
-	public void authenticateWhenAccessTokenWithoutClientCreateScopeThenThrowOAuth2AuthenticationException() {
-
-		JwtAuthenticationToken authentication = buildJwtAuthenticationToken("client-registration-token",  "SCOPE_scope1");
-
-		OAuth2AccessToken accessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER,
-				"client-registration-token", Instant.now().minusSeconds(120), Instant.now().plusSeconds(1000),
-				new HashSet<>(Collections.singletonList("scope1")));
-
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization()
-				.token(accessToken)
-				.build();
-
-		when(authorizationService.findByToken(
-				eq("client-registration-token"), eq(OAuth2TokenType.ACCESS_TOKEN)))
-				.thenReturn(authorization);
-
-		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
-				.isInstanceOf(OAuth2AuthenticationException.class)
-				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
-				.extracting("errorCode")
-				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
-	}
-
-	@Test
-	public void authenticateWhenValidAccessTokenThenInvalidated() {
-		JwtAuthenticationToken authentication = buildJwtAuthenticationToken("client-registration-token", "SCOPE_client.create");
-
-		OAuth2AccessToken accessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER,
-				"client-registration-token", Instant.now().minusSeconds(120), Instant.now().plusSeconds(1000),
-				new HashSet<>(Collections.singletonList("client.create")));
-
-		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization()
-				.token(accessToken)
-				.build();
-
-		when(authorizationService.findByToken(
-				eq("client-registration-token"), eq(OAuth2TokenType.ACCESS_TOKEN)))
-				.thenReturn(authorization);
-
-		authenticationProvider.authenticate(authentication);
-
-		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
-		verify(authorizationService).save(authorizationCaptor.capture());
-
-		OAuth2Authorization capturedAuthorization = authorizationCaptor.getValue();
-
-		assertThat(capturedAuthorization.getAccessToken()).isNotNull();
-		assertThat(capturedAuthorization.getAccessToken().isInvalidated()).isTrue();
-	}
-
-	private static JwtAuthenticationToken buildJwtAuthenticationToken(String tokenValue, String... authorities) {
-		Jwt jwt = Jwt.withTokenValue(tokenValue)
-				.header("alg", "none")
-				.claim("sub", "client")
-				.build();
-		List<GrantedAuthority> grantedAuthorities = AuthorityUtils.createAuthorityList(authorities);
-		JwtAuthenticationToken jwtAuthenticationToken = new JwtAuthenticationToken(jwt, grantedAuthorities);
-		jwtAuthenticationToken.setAuthenticated(true);
-		return jwtAuthenticationToken;
-	}
-}

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/client/InMemoryRegisteredClientRepositoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 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.
@@ -15,21 +15,24 @@
  */
 package org.springframework.security.oauth2.server.authorization.client;
 
-import org.junit.Test;
-import org.springframework.security.oauth2.core.AuthorizationGrantType;
-import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
-
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
+import org.junit.Test;
+
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 
 /**
  * Tests for {@link InMemoryRegisteredClientRepository}.
  *
  * @author Anoop Garlapati
+ * @author Ovidiu Popa
+ * @author Joe Grandja
  */
 public class InMemoryRegisteredClientRepositoryTests {
 	private RegisteredClient registration = TestRegisteredClients.registeredClient().build();
@@ -38,47 +41,70 @@ public class InMemoryRegisteredClientRepositoryTests {
 
 	@Test
 	public void constructorVarargsRegisteredClientWhenNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			RegisteredClient registration = null;
-			new InMemoryRegisteredClientRepository(registration);
-		}).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> {
+					RegisteredClient registration = null;
+					new InMemoryRegisteredClientRepository(registration);
+				})
+				.withMessageContaining("registration cannot be null");
 	}
 
 	@Test
 	public void constructorListRegisteredClientWhenNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			List<RegisteredClient> registrations = null;
-			new InMemoryRegisteredClientRepository(registrations);
-		}).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> {
+					List<RegisteredClient> registrations = null;
+					new InMemoryRegisteredClientRepository(registrations);
+				})
+				.withMessageContaining("registrations cannot be empty");
 	}
 
 	@Test
 	public void constructorListRegisteredClientWhenEmptyThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			List<RegisteredClient> registrations = Collections.emptyList();
-			new InMemoryRegisteredClientRepository(registrations);
-		}).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> {
+					List<RegisteredClient> registrations = Collections.emptyList();
+					new InMemoryRegisteredClientRepository(registrations);
+				})
+				.withMessageContaining("registrations cannot be empty");
 	}
 
 	@Test
 	public void constructorListRegisteredClientWhenDuplicateIdThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			RegisteredClient anotherRegistrationWithSameId = TestRegisteredClients.registeredClient2()
-					.id(this.registration.getId()).build();
-			List<RegisteredClient> registrations = Arrays.asList(this.registration, anotherRegistrationWithSameId);
-			new InMemoryRegisteredClientRepository(registrations);
-		}).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> {
+					RegisteredClient anotherRegistrationWithSameId = TestRegisteredClients.registeredClient2()
+							.id(this.registration.getId()).build();
+					List<RegisteredClient> registrations = Arrays.asList(this.registration, anotherRegistrationWithSameId);
+					new InMemoryRegisteredClientRepository(registrations);
+				})
+				.withMessageStartingWith("Registered client must be unique. Found duplicate identifier:");
 	}
 
 	@Test
 	public void constructorListRegisteredClientWhenDuplicateClientIdThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			RegisteredClient anotherRegistrationWithSameClientId = TestRegisteredClients.registeredClient2()
-					.clientId(this.registration.getClientId()).build();
-			List<RegisteredClient> registrations = Arrays.asList(this.registration,
-					anotherRegistrationWithSameClientId);
-			new InMemoryRegisteredClientRepository(registrations);
-		}).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> {
+					RegisteredClient anotherRegistrationWithSameClientId = TestRegisteredClients.registeredClient2()
+							.clientId(this.registration.getClientId()).build();
+					List<RegisteredClient> registrations = Arrays.asList(this.registration,
+							anotherRegistrationWithSameClientId);
+					new InMemoryRegisteredClientRepository(registrations);
+				})
+				.withMessageStartingWith("Registered client must be unique. Found duplicate client identifier:");
+	}
+
+	@Test
+	public void constructorListRegisteredClientWhenDuplicateClientSecretThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> {
+					RegisteredClient anotherRegistrationWithSameClientSecret = TestRegisteredClients.registeredClient2()
+							.clientSecret(this.registration.getClientSecret()).build();
+					List<RegisteredClient> registrations = Arrays.asList(this.registration,
+							anotherRegistrationWithSameClientSecret);
+					new InMemoryRegisteredClientRepository(registrations);
+				})
+				.withMessageStartingWith("Registered client must be unique. Found duplicate client secret for identifier:");
 	}
 
 	@Test
@@ -95,7 +121,9 @@ public class InMemoryRegisteredClientRepositoryTests {
 
 	@Test
 	public void findByIdWhenNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> this.clients.findById(null)).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.clients.findById(null))
+				.withMessageContaining("id cannot be empty");
 	}
 
 	@Test
@@ -112,79 +140,76 @@ public class InMemoryRegisteredClientRepositoryTests {
 
 	@Test
 	public void findByClientIdWhenNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> this.clients.findByClientId(null)).isInstanceOf(IllegalArgumentException.class);
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.clients.findByClientId(null))
+				.withMessageContaining("clientId cannot be empty");
 	}
 
 	@Test
-	public void saveNullRegisteredClientThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> this.clients.saveClient(null))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessageContaining("registeredClient cannot be null");
+	public void saveWhenNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.clients.save(null))
+				.withMessageContaining("registeredClient cannot be null");
 	}
 
 	@Test
-	public void saveRegisteredClientThenReturnsSavedRegisteredClientWhenSearchedById() {
-		RegisteredClient registeredClient = RegisteredClient.withId("new-client")
-				.clientId("new-client")
-				.clientSecret("secret")
+	public void saveWhenExistingIdThenThrowIllegalArgumentException() {
+		RegisteredClient registeredClient = createRegisteredClient(
+				this.registration.getId(), "client-id-2", "client-secret-2");
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.clients.save(registeredClient))
+				.withMessage("Registered client must be unique. Found duplicate identifier: " + registeredClient.getId());
+	}
+
+	@Test
+	public void saveWhenExistingClientIdThenThrowIllegalArgumentException() {
+		RegisteredClient registeredClient = createRegisteredClient(
+				"client-2", this.registration.getClientId(), "client-secret-2");
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.clients.save(registeredClient))
+				.withMessage("Registered client must be unique. Found duplicate client identifier: " + registeredClient.getClientId());
+	}
+
+	@Test
+	public void saveWhenExistingClientSecretThenThrowIllegalArgumentException() {
+		RegisteredClient registeredClient = createRegisteredClient(
+				"client-2", "client-id-2", this.registration.getClientSecret());
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.clients.save(registeredClient))
+				.withMessage("Registered client must be unique. Found duplicate client secret for identifier: " + registeredClient.getId());
+	}
+
+	@Test
+	public void saveWhenSavedAndFindByIdThenFound() {
+		RegisteredClient registeredClient = createRegisteredClient();
+		this.clients.save(registeredClient);
+		RegisteredClient savedClient = this.clients.findById(registeredClient.getId());
+		assertThat(savedClient).isEqualTo(registeredClient);
+	}
+
+	@Test
+	public void saveWhenSavedAndFindByClientIdThenFound() {
+		RegisteredClient registeredClient = createRegisteredClient();
+		this.clients.save(registeredClient);
+		RegisteredClient savedClient = this.clients.findByClientId(registeredClient.getClientId());
+		assertThat(savedClient).isEqualTo(registeredClient);
+	}
+
+	private static RegisteredClient createRegisteredClient() {
+		return createRegisteredClient("client-2", "client-id-2", "client-secret-2");
+	}
+
+	private static RegisteredClient createRegisteredClient(String id, String clientId, String clientSecret) {
+		// @formatter:off
+		return RegisteredClient.withId(id)
+				.clientId(clientId)
+				.clientSecret(clientSecret)
 				.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
 				.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
-				.redirectUri("https://newclient.com")
-				.scope("scope1").build();
-
-		this.clients.saveClient(registeredClient);
-
-		RegisteredClient savedClient = this.clients.findById("new-client");
-
-		assertThat(savedClient).isNotNull().isEqualTo(registeredClient);
+				.redirectUri("https://client.example.com")
+				.scope("scope1")
+				.build();
+		// @formatter:on
 	}
 
-	@Test
-	public void saveRegisteredClientThenReturnsSavedRegisteredClientWhenSearchedByClientId() {
-		RegisteredClient registeredClient = RegisteredClient.withId("id1")
-				.clientId("new-client-id")
-				.clientSecret("secret")
-				.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
-				.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
-				.redirectUri("https://newclient.com")
-				.scope("scope1").build();
-
-		this.clients.saveClient(registeredClient);
-
-		RegisteredClient savedClient = this.clients.findByClientId("new-client-id");
-
-		assertThat(savedClient).isNotNull().isEqualTo(registeredClient);
-	}
-
-	@Test
-	public void saveRegisteredClientWithExistingIdThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			RegisteredClient registeredClient = RegisteredClient.withId("registration-1")
-					.clientId("new-client")
-					.clientSecret("secret")
-					.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
-					.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
-					.redirectUri("https://newclient.com")
-					.scope("scope1").build();
-
-			this.clients.saveClient(registeredClient);
-		}).isInstanceOf(IllegalArgumentException.class)
-		.hasMessageContaining("Registered client must be unique. Found duplicate identifier");
-	}
-
-	@Test
-	public void saveRegisteredClientWithExistingClientIdThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> {
-			RegisteredClient registeredClient = RegisteredClient.withId("new-client")
-					.clientId("client-1")
-					.clientSecret("secret")
-					.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
-					.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
-					.redirectUri("https://newclient.com")
-					.scope("scope1").build();
-
-			this.clients.saveClient(registeredClient);
-		}).isInstanceOf(IllegalArgumentException.class)
-		.hasMessageContaining("Registered client must be unique. Found duplicate client identifier");
-	}
 }

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/client/RegisteredClientTests.java

@@ -15,6 +15,8 @@
  */
 package org.springframework.security.oauth2.server.authorization.client;
 
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.Collections;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -58,9 +60,14 @@ public class RegisteredClientTests {
 
 	@Test
 	public void buildWhenAllAttributesProvidedThenAllAttributesAreSet() {
+		Instant clientIdIssuedAt = Instant.now();
+		Instant clientSecretExpiresAt = clientIdIssuedAt.plus(30, ChronoUnit.DAYS);
 		RegisteredClient registration = RegisteredClient.withId(ID)
 				.clientId(CLIENT_ID)
+				.clientIdIssuedAt(clientIdIssuedAt)
 				.clientSecret(CLIENT_SECRET)
+				.clientSecretExpiresAt(clientSecretExpiresAt)
+				.clientName("client-name")
 				.authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE)
 				.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
 				.redirectUris(redirectUris -> redirectUris.addAll(REDIRECT_URIS))
@@ -69,7 +76,10 @@ public class RegisteredClientTests {
 
 		assertThat(registration.getId()).isEqualTo(ID);
 		assertThat(registration.getClientId()).isEqualTo(CLIENT_ID);
+		assertThat(registration.getClientIdIssuedAt()).isEqualTo(clientIdIssuedAt);
 		assertThat(registration.getClientSecret()).isEqualTo(CLIENT_SECRET);
+		assertThat(registration.getClientSecretExpiresAt()).isEqualTo(clientSecretExpiresAt);
+		assertThat(registration.getClientName()).isEqualTo("client-name");
 		assertThat(registration.getAuthorizationGrantTypes())
 				.isEqualTo(Collections.singleton(AuthorizationGrantType.AUTHORIZATION_CODE));
 		assertThat(registration.getClientAuthenticationMethods()).isEqualTo(CLIENT_AUTHENTICATION_METHODS);
@@ -325,7 +335,10 @@ public class RegisteredClientTests {
 
 		assertThat(registration.getId()).isEqualTo(updated.getId());
 		assertThat(registration.getClientId()).isEqualTo(updated.getClientId());
+		assertThat(registration.getClientIdIssuedAt()).isEqualTo(updated.getClientIdIssuedAt());
 		assertThat(registration.getClientSecret()).isEqualTo(updated.getClientSecret());
+		assertThat(registration.getClientSecretExpiresAt()).isEqualTo(updated.getClientSecretExpiresAt());
+		assertThat(registration.getClientName()).isEqualTo(updated.getClientName());
 		assertThat(registration.getClientAuthenticationMethods()).isEqualTo(updated.getClientAuthenticationMethods());
 		assertThat(registration.getClientAuthenticationMethods()).isNotSameAs(updated.getClientAuthenticationMethods());
 		assertThat(registration.getAuthorizationGrantTypes()).isEqualTo(updated.getAuthorizationGrantTypes());
@@ -343,10 +356,12 @@ public class RegisteredClientTests {
 	@Test
 	public void buildWhenRegisteredClientValuesOverriddenThenPropagated() {
 		RegisteredClient registration = TestRegisteredClients.registeredClient().build();
+		String newName = "client-name";
 		String newSecret = "new-secret";
 		String newScope = "new-scope";
 		String newRedirectUri = "https://another-redirect-uri.com";
 		RegisteredClient updated = RegisteredClient.from(registration)
+				.clientName(newName)
 				.clientSecret(newSecret)
 				.scopes(scopes -> {
 					scopes.clear();
@@ -358,6 +373,8 @@ public class RegisteredClientTests {
 				})
 				.build();
 
+		assertThat(registration.getClientName()).isNotEqualTo(newName);
+		assertThat(updated.getClientName()).isEqualTo(newName);
 		assertThat(registration.getClientSecret()).isNotEqualTo(newSecret);
 		assertThat(updated.getClientSecret()).isEqualTo(newSecret);
 		assertThat(registration.getScopes()).doesNotContain(newScope);

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/config/ProviderSettingsTests.java

@@ -38,7 +38,6 @@ public class ProviderSettingsTests {
 		assertThat(providerSettings.tokenRevocationEndpoint()).isEqualTo("/oauth2/revoke");
 		assertThat(providerSettings.tokenIntrospectionEndpoint()).isEqualTo("/oauth2/introspect");
 		assertThat(providerSettings.oidcClientRegistrationEndpoint()).isEqualTo("/connect/register");
-		assertThat(providerSettings.isOidClientRegistrationEndpointEnabled()).isFalse();
 	}
 
 	@Test
@@ -48,8 +47,8 @@ public class ProviderSettingsTests {
 		String jwkSetEndpoint = "/oauth2/v1/jwks";
 		String tokenRevocationEndpoint = "/oauth2/v1/revoke";
 		String tokenIntrospectionEndpoint = "/oauth2/v1/introspect";
-		String issuer = "https://example.com:9000";
 		String oidcClientRegistrationEndpoint = "/connect/v1/register";
+		String issuer = "https://example.com:9000";
 
 		ProviderSettings providerSettings = new ProviderSettings()
 				.issuer(issuer)
@@ -59,7 +58,6 @@ public class ProviderSettingsTests {
 				.tokenRevocationEndpoint(tokenRevocationEndpoint)
 				.tokenIntrospectionEndpoint(tokenIntrospectionEndpoint)
 				.tokenRevocationEndpoint(tokenRevocationEndpoint)
-				.isOidClientRegistrationEndpointEnabled(true)
 				.oidcClientRegistrationEndpoint(oidcClientRegistrationEndpoint);
 
 		assertThat(providerSettings.issuer()).isEqualTo(issuer);
@@ -69,7 +67,6 @@ public class ProviderSettingsTests {
 		assertThat(providerSettings.tokenRevocationEndpoint()).isEqualTo(tokenRevocationEndpoint);
 		assertThat(providerSettings.tokenIntrospectionEndpoint()).isEqualTo(tokenIntrospectionEndpoint);
 		assertThat(providerSettings.oidcClientRegistrationEndpoint()).isEqualTo(oidcClientRegistrationEndpoint);
-		assertThat(providerSettings.isOidClientRegistrationEndpointEnabled()).isTrue();
 	}
 
 	@Test
@@ -78,7 +75,7 @@ public class ProviderSettingsTests {
 				.setting("name1", "value1")
 				.settings(settings -> settings.put("name2", "value2"));
 
-		assertThat(providerSettings.settings()).hasSize(9);
+		assertThat(providerSettings.settings()).hasSize(8);
 		assertThat(providerSettings.<String>setting("name1")).isEqualTo("value1");
 		assertThat(providerSettings.<String>setting("name2")).isEqualTo("value2");
 	}
@@ -126,12 +123,11 @@ public class ProviderSettingsTests {
 	@Test
 	public void oidcClientRegistrationEndpointWhenNullThenThrowIllegalArgumentException() {
 		ProviderSettings settings = new ProviderSettings();
-		assertThatThrownBy(() -> settings.oidcClientRegistrationEndpoint(null))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("value cannot be null");
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> settings.oidcClientRegistrationEndpoint(null))
+				.withMessage("value cannot be null");
 	}
 
-
 	@Test
 	public void jwksEndpointWhenNullThenThrowIllegalArgumentException() {
 		ProviderSettings settings = new ProviderSettings();
@@ -139,4 +135,5 @@ public class ProviderSettingsTests {
 				.isThrownBy(() -> settings.jwkSetEndpoint(null))
 				.withMessage("value cannot be null");
 	}
+
 }

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/config/TokenSettingsTests.java

@@ -15,9 +15,11 @@
  */
 package org.springframework.security.oauth2.server.authorization.config;
 
+import java.time.Duration;
+
 import org.junit.Test;
 
-import java.time.Duration;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
@@ -32,10 +34,11 @@ public class TokenSettingsTests {
 	@Test
 	public void constructorWhenDefaultThenDefaultsAreSet() {
 		TokenSettings tokenSettings = new TokenSettings();
-		assertThat(tokenSettings.settings()).hasSize(3);
+		assertThat(tokenSettings.settings()).hasSize(4);
 		assertThat(tokenSettings.accessTokenTimeToLive()).isEqualTo(Duration.ofMinutes(5));
 		assertThat(tokenSettings.reuseRefreshTokens()).isTrue();
 		assertThat(tokenSettings.refreshTokenTimeToLive()).isEqualTo(Duration.ofMinutes(60));
+		assertThat(tokenSettings.idTokenSignatureAlgorithm()).isEqualTo(SignatureAlgorithm.RS256);
 	}
 
 	@Test
@@ -101,17 +104,25 @@ public class TokenSettingsTests {
 				.isEqualTo("refreshTokenTimeToLive must be greater than Duration.ZERO");
 	}
 
+	@Test
+	public void idTokenSignatureAlgorithmWhenProvidedThenSet() {
+		SignatureAlgorithm idTokenSignatureAlgorithm = SignatureAlgorithm.RS512;
+		TokenSettings tokenSettings = new TokenSettings().idTokenSignatureAlgorithm(idTokenSignatureAlgorithm);
+		assertThat(tokenSettings.idTokenSignatureAlgorithm()).isEqualTo(idTokenSignatureAlgorithm);
+	}
+
 	@Test
 	public void settingWhenCalledThenReturnTokenSettings() {
 		Duration accessTokenTimeToLive = Duration.ofMinutes(10);
 		TokenSettings tokenSettings = new TokenSettings()
 				.<TokenSettings>setting("name1", "value1")
 				.accessTokenTimeToLive(accessTokenTimeToLive)
-				.<TokenSettings>settings(settings -> settings.put("name2", "value2"));
-		assertThat(tokenSettings.settings()).hasSize(5);
+				.settings(settings -> settings.put("name2", "value2"));
+		assertThat(tokenSettings.settings()).hasSize(6);
 		assertThat(tokenSettings.accessTokenTimeToLive()).isEqualTo(accessTokenTimeToLive);
 		assertThat(tokenSettings.reuseRefreshTokens()).isTrue();
 		assertThat(tokenSettings.refreshTokenTimeToLive()).isEqualTo(Duration.ofMinutes(60));
+		assertThat(tokenSettings.idTokenSignatureAlgorithm()).isEqualTo(SignatureAlgorithm.RS256);
 		assertThat(tokenSettings.<String>setting("name1")).isEqualTo("value1");
 		assertThat(tokenSettings.<String>setting("name2")).isEqualTo("value2");
 	}

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

@@ -0,0 +1,314 @@
+/*
+ * Copyright 2020-2021 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
+ *
+ *      https://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.security.oauth2.server.authorization.oidc.authentication;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+
+import org.springframework.security.authentication.TestingAuthenticationToken;
+import org.springframework.security.core.authority.AuthorityUtils;
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+import org.springframework.security.oauth2.core.OAuth2AccessToken;
+import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
+import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
+import org.springframework.security.oauth2.core.OAuth2TokenType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+import org.springframework.security.oauth2.jwt.JoseHeader;
+import org.springframework.security.oauth2.jwt.Jwt;
+import org.springframework.security.oauth2.jwt.JwtClaimsSet;
+import org.springframework.security.oauth2.jwt.TestJoseHeaders;
+import org.springframework.security.oauth2.jwt.TestJwtClaimsSets;
+import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
+import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
+import org.springframework.security.oauth2.server.authorization.TestOAuth2Authorizations;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
+import org.springframework.security.oauth2.server.authorization.client.TestRegisteredClients;
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests for {@link OidcClientRegistrationAuthenticationProvider}.
+ *
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ */
+public class OidcClientRegistrationAuthenticationProviderTests {
+	private RegisteredClientRepository registeredClientRepository;
+	private OAuth2AuthorizationService authorizationService;
+	private OidcClientRegistrationAuthenticationProvider authenticationProvider;
+
+	@Before
+	public void setUp() {
+		this.registeredClientRepository = mock(RegisteredClientRepository.class);
+		this.authorizationService = mock(OAuth2AuthorizationService.class);
+		this.authenticationProvider = new OidcClientRegistrationAuthenticationProvider(
+				this.registeredClientRepository, this.authorizationService);
+	}
+
+	@Test
+	public void constructorWhenRegisteredClientRepositoryNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> new OidcClientRegistrationAuthenticationProvider(null, this.authorizationService))
+				.withMessage("registeredClientRepository cannot be null");
+	}
+
+	@Test
+	public void constructorWhenAuthorizationServiceNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> new OidcClientRegistrationAuthenticationProvider(this.registeredClientRepository, null))
+				.withMessage("authorizationService cannot be null");
+	}
+
+	@Test
+	public void supportsWhenTypeOidcClientRegistrationAuthenticationTokenThenReturnTrue() {
+		assertThat(this.authenticationProvider.supports(OidcClientRegistrationAuthenticationToken.class)).isTrue();
+	}
+
+	@Test
+	public void authenticateWhenPrincipalNotOAuth2TokenAuthenticationTokenThenThrowOAuth2AuthenticationException() {
+		TestingAuthenticationToken principal = new TestingAuthenticationToken("principal", "credentials");
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.redirectUri("https://client.example.com")
+				.build();
+
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				principal, clientRegistration);
+
+		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
+				.isInstanceOf(OAuth2AuthenticationException.class)
+				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError()).extracting("errorCode")
+				.isEqualTo(OAuth2ErrorCodes.INVALID_TOKEN);
+	}
+
+	@Test
+	public void authenticateWhenPrincipalNotAuthenticatedThenThrowOAuth2AuthenticationException() {
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(createJwt());
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.redirectUri("https://client.example.com")
+				.build();
+
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				principal, clientRegistration);
+
+		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
+				.isInstanceOf(OAuth2AuthenticationException.class)
+				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError()).extracting("errorCode")
+				.isEqualTo(OAuth2ErrorCodes.INVALID_TOKEN);
+	}
+
+	@Test
+	public void authenticateWhenAccessTokenNotFoundThenThrowOAuth2AuthenticationException() {
+		Jwt jwt = createJwt();
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(
+				jwt, AuthorityUtils.createAuthorityList("SCOPE_client.create"));
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.redirectUri("https://client.example.com")
+				.build();
+
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				principal, clientRegistration);
+
+		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
+				.isInstanceOf(OAuth2AuthenticationException.class)
+				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError()).extracting("errorCode")
+				.isEqualTo(OAuth2ErrorCodes.INVALID_TOKEN);
+		verify(this.authorizationService).findByToken(
+				eq(jwt.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN));
+	}
+
+	@Test
+	public void authenticateWhenAccessTokenNotActiveThenThrowOAuth2AuthenticationException() {
+		Jwt jwt = createJwt();
+		OAuth2AccessToken jwtAccessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER,
+				jwt.getTokenValue(), jwt.getIssuedAt(),
+				jwt.getExpiresAt(), jwt.getClaim(OAuth2ParameterNames.SCOPE));
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
+		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(
+				registeredClient, jwtAccessToken, jwt.getClaims()).build();
+		authorization = OidcAuthenticationProviderUtils.invalidate(authorization, jwtAccessToken);
+		when(this.authorizationService.findByToken(
+				eq(jwtAccessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN)))
+				.thenReturn(authorization);
+
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(
+				jwt, AuthorityUtils.createAuthorityList("SCOPE_client.create"));
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.redirectUri("https://client.example.com")
+				.build();
+
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				principal, clientRegistration);
+
+		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
+				.isInstanceOf(OAuth2AuthenticationException.class)
+				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError()).extracting("errorCode")
+				.isEqualTo(OAuth2ErrorCodes.INVALID_TOKEN);
+		verify(this.authorizationService).findByToken(
+				eq(jwtAccessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN));
+	}
+
+	@Test
+	public void authenticateWhenAccessTokenNotAuthorizedThenThrowOAuth2AuthenticationException() {
+		Jwt jwt = createJwt(Collections.singleton("unauthorized.scope"));
+		OAuth2AccessToken jwtAccessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER,
+				jwt.getTokenValue(), jwt.getIssuedAt(),
+				jwt.getExpiresAt(), jwt.getClaim(OAuth2ParameterNames.SCOPE));
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
+		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(
+				registeredClient, jwtAccessToken, jwt.getClaims()).build();
+		when(this.authorizationService.findByToken(
+				eq(jwtAccessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN)))
+				.thenReturn(authorization);
+
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(
+				jwt, AuthorityUtils.createAuthorityList("SCOPE_unauthorized.scope"));
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.redirectUri("https://client.example.com")
+				.build();
+
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				principal, clientRegistration);
+
+		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
+				.isInstanceOf(OAuth2AuthenticationException.class)
+				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError()).extracting("errorCode")
+				.isEqualTo(OAuth2ErrorCodes.INSUFFICIENT_SCOPE);
+		verify(this.authorizationService).findByToken(
+				eq(jwtAccessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN));
+	}
+
+	@Test
+	public void authenticateWhenValidAccessTokenThenReturnClientRegistration() {
+		Jwt jwt = createJwt();
+		OAuth2AccessToken jwtAccessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER,
+				jwt.getTokenValue(), jwt.getIssuedAt(),
+				jwt.getExpiresAt(), jwt.getClaim(OAuth2ParameterNames.SCOPE));
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
+		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(
+				registeredClient, jwtAccessToken, jwt.getClaims()).build();
+		when(this.authorizationService.findByToken(
+				eq(jwtAccessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN)))
+				.thenReturn(authorization);
+
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(
+				jwt, AuthorityUtils.createAuthorityList("SCOPE_client.create"));
+		// @formatter:off
+		OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+				.clientName("client-name")
+				.redirectUri("https://client.example.com")
+				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
+				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
+				.scope("scope1")
+				.scope("scope2")
+				.build();
+		// @formatter:on
+
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				principal, clientRegistration);
+		OidcClientRegistrationAuthenticationToken authenticationResult =
+				(OidcClientRegistrationAuthenticationToken) this.authenticationProvider.authenticate(authentication);
+
+		ArgumentCaptor<RegisteredClient> registeredClientCaptor = ArgumentCaptor.forClass(RegisteredClient.class);
+		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
+
+		verify(this.authorizationService).findByToken(
+				eq(jwtAccessToken.getTokenValue()), eq(OAuth2TokenType.ACCESS_TOKEN));
+		verify(this.registeredClientRepository).save(registeredClientCaptor.capture());
+		verify(this.authorizationService).save(authorizationCaptor.capture());
+
+		OAuth2Authorization authorizationResult = authorizationCaptor.getValue();
+		assertThat(authorizationResult.getAccessToken().isInvalidated()).isTrue();
+		if (authorizationResult.getRefreshToken() != null) {
+			assertThat(authorizationResult.getRefreshToken().isInvalidated()).isTrue();
+		}
+
+		RegisteredClient registeredClientResult = registeredClientCaptor.getValue();
+		assertThat(registeredClientResult.getId()).isNotNull();
+		assertThat(registeredClientResult.getClientId()).isNotNull();
+		assertThat(registeredClientResult.getClientIdIssuedAt()).isNotNull();
+		assertThat(registeredClientResult.getClientSecret()).isNotNull();
+		assertThat(registeredClientResult.getClientName()).isEqualTo(clientRegistration.getClientName());
+		assertThat(registeredClientResult.getClientAuthenticationMethods()).containsExactly(ClientAuthenticationMethod.BASIC);
+		assertThat(registeredClientResult.getRedirectUris()).containsExactly("https://client.example.com");
+		assertThat(registeredClientResult.getAuthorizationGrantTypes())
+				.containsExactlyInAnyOrder(AuthorizationGrantType.AUTHORIZATION_CODE, AuthorizationGrantType.CLIENT_CREDENTIALS);
+		assertThat(registeredClientResult.getScopes()).containsExactlyInAnyOrder("scope1", "scope2");
+		assertThat(registeredClientResult.getClientSettings().requireProofKey()).isTrue();
+		assertThat(registeredClientResult.getClientSettings().requireUserConsent()).isTrue();
+		assertThat(registeredClientResult.getTokenSettings().idTokenSignatureAlgorithm()).isEqualTo(SignatureAlgorithm.RS256);
+
+		OidcClientRegistration clientRegistrationResult = authenticationResult.getClientRegistration();
+		assertThat(clientRegistrationResult.getClientId()).isEqualTo(registeredClientResult.getClientId());
+		assertThat(clientRegistrationResult.getClientIdIssuedAt()).isEqualTo(registeredClientResult.getClientIdIssuedAt());
+		assertThat(clientRegistrationResult.getClientSecret()).isEqualTo(registeredClientResult.getClientSecret());
+		assertThat(clientRegistrationResult.getClientSecretExpiresAt()).isEqualTo(registeredClientResult.getClientSecretExpiresAt());
+		assertThat(clientRegistrationResult.getClientName()).isEqualTo(registeredClientResult.getClientName());
+		assertThat(clientRegistrationResult.getRedirectUris())
+				.containsExactlyInAnyOrderElementsOf(registeredClientResult.getRedirectUris());
+
+		List<String> grantTypes = new ArrayList<>();
+		registeredClientResult.getAuthorizationGrantTypes().forEach(authorizationGrantType ->
+				grantTypes.add(authorizationGrantType.getValue()));
+		assertThat(clientRegistrationResult.getGrantTypes()).containsExactlyInAnyOrderElementsOf(grantTypes);
+
+		assertThat(clientRegistrationResult.getResponseTypes())
+				.containsExactly(OAuth2AuthorizationResponseType.CODE.getValue());
+		assertThat(clientRegistrationResult.getScopes())
+				.containsExactlyInAnyOrderElementsOf(registeredClientResult.getScopes());
+		assertThat(clientRegistrationResult.getTokenEndpointAuthenticationMethod())
+				.isEqualTo(registeredClientResult.getClientAuthenticationMethods().iterator().next().getValue());
+		assertThat(clientRegistrationResult.getIdTokenSignedResponseAlgorithm())
+				.isEqualTo(registeredClientResult.getTokenSettings().idTokenSignatureAlgorithm().getName());
+	}
+
+	private static Jwt createJwt() {
+		return createJwt(Collections.singleton("client.create"));
+	}
+
+	private static Jwt createJwt(Set<String> scopes) {
+		// @formatter:off
+		JoseHeader joseHeader = TestJoseHeaders.joseHeader()
+				.build();
+		JwtClaimsSet jwtClaimsSet = TestJwtClaimsSets.jwtClaimsSet()
+				.claim(OAuth2ParameterNames.SCOPE, scopes)
+				.build();
+		Jwt jwt = Jwt.withTokenValue("jwt-access-token")
+				.headers(headers -> headers.putAll(joseHeader.getHeaders()))
+				.claims(claims -> claims.putAll(jwtClaimsSet.getClaims()))
+				.build();
+		// @formatter:on
+		return jwt;
+	}
+
+}

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

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2020-2021 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
+ *
+ *      https://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.security.oauth2.server.authorization.oidc.authentication;
+
+import org.junit.Test;
+
+import org.springframework.security.authentication.TestingAuthenticationToken;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
+
+/**
+ * Tests for {@link OidcClientRegistrationAuthenticationToken}.
+ *
+ * @author Joe Grandja
+ */
+public class OidcClientRegistrationAuthenticationTokenTests {
+	private TestingAuthenticationToken principal = new TestingAuthenticationToken("principal", "credentials");
+	private OidcClientRegistration clientRegistration = OidcClientRegistration.builder()
+			.redirectUri("https://client.example.com").build();
+
+	@Test
+	public void constructorWhenPrincipalNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> new OidcClientRegistrationAuthenticationToken(null, this.clientRegistration))
+				.withMessage("principal cannot be null");
+	}
+
+	@Test
+	public void constructorWhenClientRegistrationNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> new OidcClientRegistrationAuthenticationToken(this.principal, null))
+				.withMessage("clientRegistration cannot be null");
+	}
+
+	@Test
+	public void constructorWhenAllValuesProvidedThenCreated() {
+		OidcClientRegistrationAuthenticationToken authentication = new OidcClientRegistrationAuthenticationToken(
+				this.principal, this.clientRegistration);
+
+		assertThat(authentication.getPrincipal()).isEqualTo(this.principal);
+		assertThat(authentication.getCredentials().toString()).isEmpty();
+		assertThat(authentication.getClientRegistration()).isEqualTo(this.clientRegistration);
+		assertThat(authentication.isAuthenticated()).isEqualTo(this.principal.isAuthenticated());
+	}
+
+}

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/oidc/web/OidcClientRegistrationEndpointFilterTests.java

@@ -15,267 +15,259 @@
  */
 package org.springframework.security.oauth2.server.authorization.oidc.web;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-import org.mockito.AdditionalAnswers;
-import org.mockito.ArgumentCaptor;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
-import org.springframework.http.converter.HttpMessageConverter;
-import org.springframework.mock.http.client.MockClientHttpResponse;
-import org.springframework.mock.web.MockHttpServletRequest;
-import org.springframework.mock.web.MockHttpServletResponse;
-import org.springframework.security.authentication.AuthenticationManager;
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.authority.AuthorityUtils;
-import org.springframework.security.core.context.SecurityContext;
-import org.springframework.security.core.context.SecurityContextHolder;
-import org.springframework.security.oauth2.core.AuthorizationGrantType;
-import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
-import org.springframework.security.oauth2.core.OAuth2Error;
-import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
-import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
-import org.springframework.security.oauth2.core.http.converter.OAuth2ErrorHttpMessageConverter;
-import org.springframework.security.oauth2.core.oidc.OidcClientMetadataClaimNames;
-import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
-import org.springframework.security.oauth2.jwt.Jwt;
-import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
-import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
-import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
+import java.time.Instant;
+import java.util.Collections;
 
 import javax.servlet.FilterChain;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
-import java.util.List;
-import java.util.Map;
-import java.util.stream.Collectors;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.mock.http.client.MockClientHttpRequest;
+import org.springframework.mock.http.client.MockClientHttpResponse;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.core.authority.AuthorityUtils;
+import org.springframework.security.core.context.SecurityContext;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
+import org.springframework.security.oauth2.core.OAuth2Error;
+import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.security.oauth2.core.http.converter.OAuth2ErrorHttpMessageConverter;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+import org.springframework.security.oauth2.core.oidc.http.converter.OidcClientRegistrationHttpMessageConverter;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+import org.springframework.security.oauth2.jwt.JoseHeader;
+import org.springframework.security.oauth2.jwt.Jwt;
+import org.springframework.security.oauth2.jwt.JwtClaimsSet;
+import org.springframework.security.oauth2.jwt.TestJoseHeaders;
+import org.springframework.security.oauth2.jwt.TestJwtClaimsSets;
+import org.springframework.security.oauth2.server.authorization.oidc.authentication.OidcClientRegistrationAuthenticationToken;
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoInteractions;
 import static org.mockito.Mockito.when;
 
 /**
- * Tests for {@link OidcClientRegistrationEndpointFilter}
+ * Tests for {@link OidcClientRegistrationEndpointFilter}.
  *
  * @author Ovidiu Popa
- * @since 0.1.1
+ * @author Joe Grandja
  */
 public class OidcClientRegistrationEndpointFilterTests {
-
-	private static final OidcClientRegistration.Builder OIDC_CLIENT_REGISTRATION = OidcClientRegistration.builder()
-			.redirectUri("https://localhost:8080/client")
-			.responseType("code")
-			.grantType("authorization_code")
-			.tokenEndpointAuthenticationMethod("basic")
-			.scope("test");
+	private AuthenticationManager authenticationManager;
+	private OidcClientRegistrationEndpointFilter filter;
+	private final HttpMessageConverter<OidcClientRegistration> clientRegistrationHttpMessageConverter =
+			new OidcClientRegistrationHttpMessageConverter();
 	private final HttpMessageConverter<OAuth2Error> errorHttpResponseConverter =
 			new OAuth2ErrorHttpMessageConverter();
-	private static RegisteredClientRepository registeredClientRepository;
-	private static AuthenticationManager authenticationManager;
-
-	@BeforeClass
-	public static void init() {
-		registeredClientRepository = mock(RegisteredClientRepository.class);
-		authenticationManager = mock(AuthenticationManager.class);
-	}
 
 	@Before
 	public void setup() {
-		reset(registeredClientRepository);
-		reset(authenticationManager);
+		this.authenticationManager = mock(AuthenticationManager.class);
+		this.filter = new OidcClientRegistrationEndpointFilter(this.authenticationManager);
 	}
 
 	@After
-	public void tearDown() {
+	public void cleanup() {
 		SecurityContextHolder.clearContext();
 	}
 
-	@Test
-	public void constructorWhenRegisteredClientRepositoryNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> new OidcClientRegistrationEndpointFilter(null,
-				authenticationManager))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("registeredClientRepository cannot be null");
-	}
-
 	@Test
 	public void constructorWhenAuthenticationManagerNullThenThrowIllegalArgumentException() {
-
-		assertThatThrownBy(() -> new OidcClientRegistrationEndpointFilter(registeredClientRepository, null))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("authenticationManager cannot be null");
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> new OidcClientRegistrationEndpointFilter(null))
+				.withMessage("authenticationManager cannot be null");
 	}
 
 	@Test
-	public void constructorWhenOidcClientRegistrationUriNullThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> new OidcClientRegistrationEndpointFilter(registeredClientRepository, authenticationManager, null))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("oidcClientRegistrationUri cannot be empty");
-	}
-
-	@Test
-	public void constructorWhenOidcClientRegistrationUriEmptyThenThrowIllegalArgumentException() {
-		assertThatThrownBy(() -> new OidcClientRegistrationEndpointFilter(registeredClientRepository, authenticationManager, ""))
-				.isInstanceOf(IllegalArgumentException.class)
-				.hasMessage("oidcClientRegistrationUri cannot be empty");
+	public void constructorWhenClientRegistrationEndpointUriNullThenThrowIllegalArgumentException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> new OidcClientRegistrationEndpointFilter(this.authenticationManager, null))
+				.withMessage("clientRegistrationEndpointUri cannot be empty");
 	}
 
 	@Test
 	public void doFilterWhenNotClientRegistrationRequestThenNotProcessed() throws Exception {
-		OidcClientRegistrationEndpointFilter filter =
-				new OidcClientRegistrationEndpointFilter(registeredClientRepository, authenticationManager);
-
 		String requestUri = "/path";
 		MockHttpServletRequest request = new MockHttpServletRequest("POST", requestUri);
 		request.setServletPath(requestUri);
 		MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain filterChain = mock(FilterChain.class);
 
-		filter.doFilter(request, response, filterChain);
+		this.filter.doFilter(request, response, filterChain);
 
 		verify(filterChain).doFilter(any(HttpServletRequest.class), any(HttpServletResponse.class));
 	}
 
 	@Test
 	public void doFilterWhenClientRegistrationRequestGetThenNotProcessed() throws Exception {
-
-		OidcClientRegistrationEndpointFilter filter =
-				new OidcClientRegistrationEndpointFilter(registeredClientRepository, authenticationManager);
-
 		String requestUri = OidcClientRegistrationEndpointFilter.DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI;
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", requestUri);
 		request.setServletPath(requestUri);
 		MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain filterChain = mock(FilterChain.class);
 
-		filter.doFilter(request, response, filterChain);
+		this.filter.doFilter(request, response, filterChain);
 
 		verify(filterChain).doFilter(any(HttpServletRequest.class), any(HttpServletResponse.class));
 	}
 
 	@Test
-	public void doFilterWhenAuthenticationManagerThrowsOAuth2AuthenticationExceptionThenBadRequest() throws Exception {
-
-		setSecurityContext("client-registration-token", true, "SCOPE_client.create");
-
-		when(authenticationManager.authenticate(any(JwtAuthenticationToken.class)))
-				.thenThrow(new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_GRANT)));
-
-		OidcClientRegistrationEndpointFilter filter =
-				new OidcClientRegistrationEndpointFilter(registeredClientRepository, authenticationManager);
-
+	public void doFilterWhenClientRegistrationRequestInvalidThenInvalidRequestError() throws Exception {
 		String requestUri = OidcClientRegistrationEndpointFilter.DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI;
 		MockHttpServletRequest request = new MockHttpServletRequest("POST", requestUri);
 		request.setServletPath(requestUri);
-
-		request.setContent(convertToByteArray(OIDC_CLIENT_REGISTRATION.build()));
-
+		request.setContent("invalid content".getBytes());
 		MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain filterChain = mock(FilterChain.class);
 
-		filter.doFilter(request, response, filterChain);
+		this.filter.doFilter(request, response, filterChain);
 
 		verifyNoInteractions(filterChain);
 
 		assertThat(response.getStatus()).isEqualTo(HttpStatus.BAD_REQUEST.value());
 		OAuth2Error error = readError(response);
-		assertThat(error.getErrorCode()).isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
+		assertThat(error.getErrorCode()).isEqualTo(OAuth2ErrorCodes.INVALID_REQUEST);
+		assertThat(error.getDescription()).startsWith("OpenID Client Registration Error: ");
 	}
 
 	@Test
-	@SuppressWarnings("unchecked")
-	public void doFilterWhenClientRegistrationRequestThenClientRegistrationResponse() throws Exception {
+	public void doFilterWhenClientRegistrationRequestInvalidTokenThenUnauthorizedError() throws Exception {
+		doFilterWhenClientRegistrationRequestInvalidThenError(
+				OAuth2ErrorCodes.INVALID_TOKEN, HttpStatus.UNAUTHORIZED);
+	}
 
-		doNothing().when(registeredClientRepository).saveClient(any(RegisteredClient.class));
-		when(authenticationManager.authenticate(any(JwtAuthenticationToken.class))).then(AdditionalAnswers.returnsFirstArg());
-		setSecurityContext("client-registration-token", true, "SCOPE_client.create");
+	@Test
+	public void doFilterWhenClientRegistrationRequestInsufficientTokenScopeThenForbiddenError() throws Exception {
+		doFilterWhenClientRegistrationRequestInvalidThenError(
+				OAuth2ErrorCodes.INSUFFICIENT_SCOPE, HttpStatus.FORBIDDEN);
+	}
 
-		OidcClientRegistrationEndpointFilter filter =
-				new OidcClientRegistrationEndpointFilter(registeredClientRepository, authenticationManager);
+	private void doFilterWhenClientRegistrationRequestInvalidThenError(
+			String errorCode, HttpStatus status) throws Exception {
+		Jwt jwt = createJwt();
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(
+				jwt, AuthorityUtils.createAuthorityList("SCOPE_client.create"));
+
+		SecurityContext securityContext = SecurityContextHolder.createEmptyContext();
+		securityContext.setAuthentication(principal);
+		SecurityContextHolder.setContext(securityContext);
+
+		when(this.authenticationManager.authenticate(any()))
+				.thenThrow(new OAuth2AuthenticationException(new OAuth2Error(errorCode)));
+
+		// @formatter:off
+		OidcClientRegistration clientRegistrationRequest = OidcClientRegistration.builder()
+				.clientName("client-name")
+				.redirectUri("https://client.example.com")
+				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
+				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
+				.scope("scope1")
+				.scope("scope2")
+				.build();
+		// @formatter:on
 
 		String requestUri = OidcClientRegistrationEndpointFilter.DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI;
 		MockHttpServletRequest request = new MockHttpServletRequest("POST", requestUri);
 		request.setServletPath(requestUri);
+		writeClientRegistrationRequest(request, clientRegistrationRequest);
+		MockHttpServletResponse response = new MockHttpServletResponse();
+		FilterChain filterChain = mock(FilterChain.class);
 
-		request.setContent(convertToByteArray(OIDC_CLIENT_REGISTRATION.build()));
+		this.filter.doFilter(request, response, filterChain);
+
+		verifyNoInteractions(filterChain);
+
+		assertThat(response.getStatus()).isEqualTo(status.value());
+		OAuth2Error error = readError(response);
+		assertThat(error.getErrorCode()).isEqualTo(errorCode);
+	}
+
+	@Test
+	public void doFilterWhenClientRegistrationRequestValidThenSuccessResponse() throws Exception {
+		// @formatter:off
+		OidcClientRegistration.Builder clientRegistrationBuilder = OidcClientRegistration.builder()
+				.clientName("client-name")
+				.redirectUri("https://client.example.com")
+				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
+				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
+				.scope("scope1")
+				.scope("scope2");
+
+		OidcClientRegistration clientRegistrationRequest = clientRegistrationBuilder.build();
+
+		OidcClientRegistration expectedClientRegistrationResponse = clientRegistrationBuilder
+				.clientId("client-id")
+				.clientIdIssuedAt(Instant.now())
+				.clientSecret("client-secret")
+				.tokenEndpointAuthenticationMethod(ClientAuthenticationMethod.BASIC.getValue())
+				.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
+				.idTokenSignedResponseAlgorithm(SignatureAlgorithm.RS256.getName())
+				.build();
+		// @formatter:on
+
+		Jwt jwt = createJwt();
+		JwtAuthenticationToken principal = new JwtAuthenticationToken(
+				jwt, AuthorityUtils.createAuthorityList("SCOPE_client.create"));
+
+		OidcClientRegistrationAuthenticationToken clientRegistrationAuthenticationResult =
+				new OidcClientRegistrationAuthenticationToken(principal, expectedClientRegistrationResponse);
+
+		when(this.authenticationManager.authenticate(any())).thenReturn(clientRegistrationAuthenticationResult);
+
+		SecurityContext securityContext = SecurityContextHolder.createEmptyContext();
+		securityContext.setAuthentication(principal);
+		SecurityContextHolder.setContext(securityContext);
+
+		String requestUri = OidcClientRegistrationEndpointFilter.DEFAULT_OIDC_CLIENT_REGISTRATION_ENDPOINT_URI;
+		MockHttpServletRequest request = new MockHttpServletRequest("POST", requestUri);
+		request.setServletPath(requestUri);
+		writeClientRegistrationRequest(request, clientRegistrationRequest);
 
 		MockHttpServletResponse response = new MockHttpServletResponse();
 		FilterChain filterChain = mock(FilterChain.class);
 
-		filter.doFilter(request, response, filterChain);
+		this.filter.doFilter(request, response, filterChain);
 
 		verifyNoInteractions(filterChain);
 
-		verify(authenticationManager).authenticate(any());
-
-		ArgumentCaptor<RegisteredClient> registeredClientCaptor = ArgumentCaptor.forClass(RegisteredClient.class);
-		verify(registeredClientRepository).saveClient(registeredClientCaptor.capture());
-
-		RegisteredClient registeredClient = registeredClientCaptor.getValue();
-
 		assertThat(response.getStatus()).isEqualTo(HttpStatus.CREATED.value());
-		assertThat(response.getContentType()).isEqualTo(MediaType.APPLICATION_JSON_VALUE);
-
-		ObjectMapper objectMapper = new ObjectMapper();
-		Map<String, Object> clientRegistrationResponse = objectMapper.readerFor(Map.class)
-				.readValue(response.getContentAsString());
-
-		assertThat(clientRegistrationResponse.get(OidcClientMetadataClaimNames.CLIENT_ID))
-				.isEqualTo(registeredClient.getClientId());
-		assertThat((String) clientRegistrationResponse.get(OidcClientMetadataClaimNames.CLIENT_SECRET))
-				.isEqualTo(registeredClient.getClientSecret());
-		assertThat((List<String>) clientRegistrationResponse.get(OidcClientMetadataClaimNames.REDIRECT_URIS))
-				.containsAll(registeredClient.getRedirectUris());
-		assertThat(clientRegistrationResponse.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT))
-				.isNotNull();
-		assertThat(clientRegistrationResponse.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT))
-				.isEqualTo(0.0);
-		assertThat((List<String>) clientRegistrationResponse.get(OidcClientMetadataClaimNames.RESPONSE_TYPES))
-				.contains(OAuth2AuthorizationResponseType.CODE.getValue());
-		assertThat((List<String>) clientRegistrationResponse.get(OidcClientMetadataClaimNames.GRANT_TYPES))
-				.containsAll(grantTypes(registeredClient));
-
-		assertThat(clientRegistrationResponse.get(OidcClientMetadataClaimNames.SCOPE))
-				.isEqualTo(String.join(" ", registeredClient.getScopes()));
-		assertThat(clientRegistrationResponse.get(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD))
-				.isEqualTo(registeredClient.getClientAuthenticationMethods().iterator().next().getValue());
-	}
-
-	private List<String> grantTypes(RegisteredClient registeredClient) {
-		return registeredClient.getAuthorizationGrantTypes().stream()
-				.map(AuthorizationGrantType::getValue)
-				.collect(Collectors.toList());
-	}
-
-	private static void setSecurityContext(String tokenValue, boolean authenticated, String... authorities) {
-		Jwt jwt = Jwt.withTokenValue(tokenValue)
-				.header("alg", "none")
-				.claim("sub", "client")
-				.build();
-		List<GrantedAuthority> grantedAuthorities = AuthorityUtils.createAuthorityList(authorities);
-		JwtAuthenticationToken jwtAuthenticationToken = new JwtAuthenticationToken(jwt, grantedAuthorities);
-		jwtAuthenticationToken.setAuthenticated(authenticated);
-		SecurityContext securityContext = SecurityContextHolder.createEmptyContext();
-		securityContext.setAuthentication(jwtAuthenticationToken);
-		SecurityContextHolder.setContext(securityContext);
-	}
-
-	private static byte[] convertToByteArray(OidcClientRegistration clientRegistration) throws JsonProcessingException {
-		ObjectMapper objectMapper = new ObjectMapper();
-
-		return objectMapper
-				.writerFor(Map.class)
-				.writeValueAsBytes(clientRegistration.getClaims());
+		OidcClientRegistration clientRegistrationResponse = readClientRegistrationResponse(response);
+		assertThat(clientRegistrationResponse.getClientId()).isEqualTo(expectedClientRegistrationResponse.getClientId());
+		assertThat(clientRegistrationResponse.getClientIdIssuedAt()).isBetween(
+				expectedClientRegistrationResponse.getClientIdIssuedAt().minusSeconds(1),
+				expectedClientRegistrationResponse.getClientIdIssuedAt().plusSeconds(1));
+		assertThat(clientRegistrationResponse.getClientSecret()).isEqualTo(expectedClientRegistrationResponse.getClientSecret());
+		assertThat(clientRegistrationResponse.getClientSecretExpiresAt()).isEqualTo(expectedClientRegistrationResponse.getClientSecretExpiresAt());
+		assertThat(clientRegistrationResponse.getClientName()).isEqualTo(expectedClientRegistrationResponse.getClientName());
+		assertThat(clientRegistrationResponse.getRedirectUris())
+				.containsExactlyInAnyOrderElementsOf(expectedClientRegistrationResponse.getRedirectUris());
+		assertThat(clientRegistrationResponse.getGrantTypes())
+				.containsExactlyInAnyOrderElementsOf(expectedClientRegistrationResponse.getGrantTypes());
+		assertThat(clientRegistrationResponse.getResponseTypes())
+				.containsExactlyInAnyOrderElementsOf(expectedClientRegistrationResponse.getResponseTypes());
+		assertThat(clientRegistrationResponse.getScopes())
+				.containsExactlyInAnyOrderElementsOf(expectedClientRegistrationResponse.getScopes());
+		assertThat(clientRegistrationResponse.getTokenEndpointAuthenticationMethod())
+				.isEqualTo(expectedClientRegistrationResponse.getTokenEndpointAuthenticationMethod());
+		assertThat(clientRegistrationResponse.getIdTokenSignedResponseAlgorithm())
+				.isEqualTo(expectedClientRegistrationResponse.getIdTokenSignedResponseAlgorithm());
 	}
 
 	private OAuth2Error readError(MockHttpServletResponse response) throws Exception {
@@ -283,4 +275,33 @@ public class OidcClientRegistrationEndpointFilterTests {
 				response.getContentAsByteArray(), HttpStatus.valueOf(response.getStatus()));
 		return this.errorHttpResponseConverter.read(OAuth2Error.class, httpResponse);
 	}
+
+	private void writeClientRegistrationRequest(MockHttpServletRequest request,
+			OidcClientRegistration clientRegistration) throws Exception {
+		MockClientHttpRequest httpRequest = new MockClientHttpRequest();
+		this.clientRegistrationHttpMessageConverter.write(clientRegistration, null, httpRequest);
+		request.setContent(httpRequest.getBodyAsBytes());
+	}
+
+	private OidcClientRegistration readClientRegistrationResponse(MockHttpServletResponse response) throws Exception {
+		MockClientHttpResponse httpResponse = new MockClientHttpResponse(
+				response.getContentAsByteArray(), HttpStatus.valueOf(response.getStatus()));
+		return this.clientRegistrationHttpMessageConverter.read(OidcClientRegistration.class, httpResponse);
+	}
+
+	private static Jwt createJwt() {
+		// @formatter:off
+		JoseHeader joseHeader = TestJoseHeaders.joseHeader()
+				.build();
+		JwtClaimsSet jwtClaimsSet = TestJwtClaimsSets.jwtClaimsSet()
+				.claim(OAuth2ParameterNames.SCOPE, Collections.singleton("client.create"))
+				.build();
+		Jwt jwt = Jwt.withTokenValue("jwt-access-token")
+				.headers(headers -> headers.putAll(joseHeader.getHeaders()))
+				.claims(claims -> claims.putAll(jwtClaimsSet.getClaims()))
+				.build();
+		// @formatter:on
+		return jwt;
+	}
+
 }

samples/boot/oauth2-integration/authorizationserver/src/main/java/sample/config/AuthorizationServerConfig.java

@@ -21,11 +21,6 @@ import com.nimbusds.jose.jwk.JWKSet;
 import com.nimbusds.jose.jwk.RSAKey;
 import com.nimbusds.jose.jwk.source.JWKSource;
 import com.nimbusds.jose.proc.SecurityContext;
-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.JwtValidators;
-import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
 import sample.jose.Jwks;
 
 import org.springframework.context.annotation.Bean;
@@ -38,6 +33,7 @@ import org.springframework.security.config.annotation.web.configuration.OAuth2Au
 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;
@@ -86,16 +82,14 @@ public class AuthorizationServerConfig {
 		return (jwkSelector, securityContext) -> jwkSelector.select(jwkSet);
 	}
 
+	@Bean
+	public JwtDecoder jwtDecoder(JWKSource<SecurityContext> jwkSource) {
+		return OAuth2AuthorizationServerConfiguration.jwtDecoder(jwkSource);
+	}
+
 	@Bean
 	public ProviderSettings providerSettings() {
 		return new ProviderSettings().issuer("http://auth-server:9000");
 	}
 
-	@Bean
-	public JwtDecoder jwtDecoder(ProviderSettings providerSettings){
-		OAuth2TokenValidator<Jwt> jwtValidator = JwtValidators.createDefaultWithIssuer(providerSettings.issuer());
-		NimbusJwtDecoder jwtDecoder = NimbusJwtDecoder.withJwkSetUri("http://auth-server:9000"+providerSettings.jwkSetEndpoint()).build();
-		jwtDecoder.setJwtValidator(jwtValidator);
-		return jwtDecoder;
-	}
 }