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href="/en/spring-security/servlet-oauth2-resource-server.html" class="sidebar-link">OAuth 2.0 Resource Server</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-jwt.html" class="sidebar-link">OAuth 2.0 Resource Server JWT</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-opaque-token.html" class="sidebar-link">OAuth 2.0 Resource Server Opaque Token</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-multitenancy.html" class="sidebar-link">OAuth 2.0 Resource Server Multitenancy</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-bearer-tokens.html" class="sidebar-link">OAuth 2.0 Bearer Tokens</a></li><li><a href="/en/spring-security/servlet-saml2.html" class="sidebar-link">SAML2</a></li><li><a href="/en/spring-security/servlet-saml2-login.html" class="sidebar-link">SAML 2.0 Login</a></li><li><a href="/en/spring-security/servlet-saml2-login-overview.html" class="sidebar-link">SAML 2.0 Login Overview</a></li><li><a href="/en/spring-security/servlet-saml2-login-authentication-requests.html" class="sidebar-link">Producing &lt;saml2:AuthnRequest&gt;s</a></li><li><a href="/en/spring-security/servlet-saml2-login-authentication.html" class="sidebar-link">Authenticating &lt;saml2:Response&gt;s</a></li><li><a href="/en/spring-security/servlet-saml2-logout.html" class="sidebar-link">Performing Single Logout</a></li><li><a href="/en/spring-security/servlet-saml2-metadata.html" class="sidebar-link">Producing &lt;saml2:SPSSODescriptor&gt; Metadata</a></li><li><a href="/en/spring-security/servlet-exploits.html" class="sidebar-link">Protection Against Exploits</a></li><li><a href="/en/spring-security/servlet-exploits-csrf.html" class="sidebar-link">Cross Site Request Forgery (CSRF) for Servlet Environments</a></li><li><a href="/en/spring-security/servlet-exploits-headers.html" class="sidebar-link">Security HTTP Response Headers</a></li><li><a href="/en/spring-security/servlet-exploits-http.html" class="sidebar-link">HTTP</a></li><li><a href="/en/spring-security/servlet-exploits-firewall.html" class="sidebar-link">HttpFirewall</a></li><li><a href="/en/spring-security/servlet-integrations.html" class="sidebar-link">Integrations</a></li><li><a href="/en/spring-security/servlet-integrations-concurrency.html" class="sidebar-link">Concurrency Support</a></li><li><a href="/en/spring-security/servlet-integrations-jackson.html" class="sidebar-link">Jackson Support</a></li><li><a href="/en/spring-security/servlet-integrations-localization.html" class="sidebar-link">Localization</a></li><li><a href="/en/spring-security/servlet-integrations-servlet-api.html" class="sidebar-link">Servlet API integration</a></li><li><a href="/en/spring-security/servlet-integrations-data.html" class="sidebar-link">Spring Data Integration</a></li><li><a href="/en/spring-security/servlet-integrations-mvc.html" class="sidebar-link">Spring MVC Integration</a></li><li><a href="/en/spring-security/servlet-integrations-websocket.html" class="sidebar-link">WebSocket Security</a></li><li><a href="/en/spring-security/servlet-integrations-cors.html" class="sidebar-link">CORS</a></li><li><a href="/en/spring-security/servlet-integrations-jsp-taglibs.html" class="sidebar-link">JSP Tag Libraries</a></li><li><a href="/en/spring-security/servlet-configuration-java.html" class="sidebar-link">Java Configuration</a></li><li><a href="/en/spring-security/servlet-configuration-kotlin.html" class="sidebar-link">Kotlin Configuration</a></li><li><a href="/en/spring-security/servlet-configuration-xml-namespace.html" class="sidebar-link">Security Namespace Configuration</a></li><li><a href="/en/spring-security/servlet-test.html" class="sidebar-link">Testing</a></li><li><a href="/en/spring-security/servlet-test-method.html" class="sidebar-link">Testing Method Security</a></li><li><a href="/en/spring-security/servlet-test-mockmvc.html" class="sidebar-link">Spring MVC Test Integration</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-setup.html" class="sidebar-link">Setting Up MockMvc and Spring Security</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-request-post-processors.html" class="sidebar-link">SecurityMockMvcRequestPostProcessors</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-authentication.html" class="sidebar-link">Running a Test as a User in Spring MVC Test</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-csrf.html" class="sidebar-link">Testing with CSRF Protection</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-form-login.html" class="sidebar-link">Testing Form Based Authentication</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-http-basic.html" class="sidebar-link">Testing HTTP Basic Authentication</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-oauth2.html" class="sidebar-link">Testing OAuth 2.0</a></li><li><a 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href="/en/spring-security/servlet-appendix-namespace-http.html" class="sidebar-link">Web Application Security</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-method-security.html" class="sidebar-link">Method Security</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-ldap.html" class="sidebar-link">LDAP Namespace Options</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-websocket.html" class="sidebar-link">WebSocket Security</a></li><li><a href="/en/spring-security/servlet-appendix-faq.html" class="sidebar-link">Spring Security FAQ</a></li><li><a href="/en/spring-security/reactive.html" class="sidebar-link">Reactive Applications</a></li><li><a href="/en/spring-security/reactive-getting-started.html" class="sidebar-link">Getting Started with WebFlux Applications</a></li><li><a href="/en/spring-security/reactive-authentication-x509.html" class="sidebar-link">Reactive X.509 Authentication</a></li><li><a href="/en/spring-security/reactive-authentication-logout.html" class="sidebar-link">Logout</a></li><li><a href="/en/spring-security/reactive-authorization-authorize-http-requests.html" class="sidebar-link">Authorize ServerHttpRequest</a></li><li><a href="/en/spring-security/reactive-authorization-method.html" class="sidebar-link">EnableReactiveMethodSecurity</a></li><li><a href="/en/spring-security/reactive-oauth2.html" class="sidebar-link">OAuth2 WebFlux</a></li><li><a href="/en/spring-security/reactive-oauth2-login.html" class="sidebar-link">OAuth 2.0 Login</a></li><li><a href="/en/spring-security/reactive-oauth2-login-core.html" class="sidebar-link">Core Configuration</a></li><li><a href="/en/spring-security/reactive-oauth2-login-advanced.html" class="sidebar-link">Advanced Configuration</a></li><li><a href="/en/spring-security/reactive-oauth2-client.html" class="sidebar-link">OAuth 2.0 Client</a></li><li><a href="/en/spring-security/reactive-oauth2-client-core.html" aria-current="page" class="active sidebar-link">Core Interfaces / Classes</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/en/spring-security/reactive-oauth2-client-core.html#clientregistration" class="sidebar-link">ClientRegistration</a></li><li class="sidebar-sub-header"><a href="/en/spring-security/reactive-oauth2-client-core.html#reactiveclientregistrationrepository" class="sidebar-link">ReactiveClientRegistrationRepository</a></li><li class="sidebar-sub-header"><a href="/en/spring-security/reactive-oauth2-client-core.html#oauth2authorizedclient" class="sidebar-link">OAuth2AuthorizedClient</a></li><li class="sidebar-sub-header"><a href="/en/spring-security/reactive-oauth2-client-core.html#serveroauth2authorizedclientrepository-reactiveoauth2authorizedclientservice" class="sidebar-link">ServerOAuth2AuthorizedClientRepository / ReactiveOAuth2AuthorizedClientService</a></li><li class="sidebar-sub-header"><a href="/en/spring-security/reactive-oauth2-client-core.html#reactiveoauth2authorizedclientmanager-reactiveoauth2authorizedclientprovider" class="sidebar-link">ReactiveOAuth2AuthorizedClientManager / ReactiveOAuth2AuthorizedClientProvider</a></li></ul></li><li><a href="/en/spring-security/reactive-oauth2-client-authorization-grants.html" class="sidebar-link">Authorization Grant Support</a></li><li><a href="/en/spring-security/reactive-oauth2-client-client-authentication.html" class="sidebar-link">Client Authentication Support</a></li><li><a href="/en/spring-security/reactive-oauth2-client-authorized-clients.html" class="sidebar-link">Authorized Clients</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server.html" class="sidebar-link">OAuth 2.0 Resource Server</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-jwt.html" class="sidebar-link">OAuth 2.0 Resource Server JWT</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-opaque-token.html" class="sidebar-link">OAuth 2.0 Resource Server Opaque Token</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-multitenancy.html" class="sidebar-link">OAuth 2.0 Resource Server Multitenancy</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-bearer-tokens.html" class="sidebar-link">OAuth 2.0 Resource Server Bearer Tokens</a></li><li><a href="/en/spring-security/reactive-exploits.html" class="sidebar-link">Protection Against Exploits</a></li><li><a href="/en/spring-security/reactive-exploits-csrf.html" class="sidebar-link">Cross Site Request Forgery (CSRF) for WebFlux Environments</a></li><li><a href="/en/spring-security/reactive-exploits-headers.html" class="sidebar-link">Security HTTP Response Headers</a></li><li><a href="/en/spring-security/reactive-exploits-http.html" class="sidebar-link">HTTP</a></li><li><a href="/en/spring-security/reactive-integrations-cors.html" class="sidebar-link">CORS</a></li><li><a href="/en/spring-security/reactive-integrations-rsocket.html" class="sidebar-link">RSocket Security</a></li><li><a href="/en/spring-security/reactive-test.html" class="sidebar-link">Reactive Test Support</a></li><li><a href="/en/spring-security/reactive-test-method.html" class="sidebar-link">Testing Method Security</a></li><li><a href="/en/spring-security/reactive-test-web.html" class="sidebar-link">Testing Web Security</a></li><li><a href="/en/spring-security/reactive-test-web-setup.html" class="sidebar-link">WebTestClient Security Setup</a></li><li><a href="/en/spring-security/reactive-test-web-authentication.html" class="sidebar-link">Testing Authentication</a></li><li><a href="/en/spring-security/reactive-test-web-csrf.html" class="sidebar-link">Testing with CSRF</a></li><li><a href="/en/spring-security/reactive-test-web-oauth2.html" class="sidebar-link">Testing OAuth 2.0</a></li><li><a href="/en/spring-security/reactive-configuration-webflux.html" class="sidebar-link">WebFlux Security</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="core-interfaces-classes"><a href="#core-interfaces-classes" class="header-anchor">#</a> Core Interfaces / Classes</h1> <h2 id="clientregistration"><a href="#clientregistration" class="header-anchor">#</a> ClientRegistration</h2> <p><code>ClientRegistration</code> is a representation of a client registered with an OAuth 2.0 or OpenID Connect 1.0 Provider.</p> <p>A client registration holds information, such as client id, client secret, authorization grant type, redirect URI, scope(s), authorization URI, token URI, and other details.</p> <p><code>ClientRegistration</code> and its properties are defined as follows:</p> <div class="language- extra-class"><pre class="language-text"><code>public final class ClientRegistration {
	private String registrationId;	(1)
	private String clientId;	(2)
	private String clientSecret;	(3)
	private ClientAuthenticationMethod clientAuthenticationMethod;	(4)
	private AuthorizationGrantType authorizationGrantType;	(5)
	private String redirectUri;	(6)
	private Set&lt;String&gt; scopes;	(7)
	private ProviderDetails providerDetails;
	private String clientName;	(8)

	public class ProviderDetails {
		private String authorizationUri;	(9)
		private String tokenUri;	(10)
		private UserInfoEndpoint userInfoEndpoint;
		private String jwkSetUri;	(11)
		private String issuerUri;	(12)
		private Map&lt;String, Object&gt; configurationMetadata;  (13)

		public class UserInfoEndpoint {
			private String uri;	(14)
			private AuthenticationMethod authenticationMethod;  (15)
			private String userNameAttributeName;	(16)

		}
	}
}
</code></pre></div><table><thead><tr><th><strong>1</strong></th> <th><code>registrationId</code>: The ID that uniquely identifies the <code>ClientRegistration</code>.</th></tr></thead> <tbody><tr><td><strong>2</strong></td> <td><code>clientId</code>: The client identifier.</td></tr> <tr><td><strong>3</strong></td> <td><code>clientSecret</code>: The client secret.</td></tr> <tr><td><strong>4</strong></td> <td><code>clientAuthenticationMethod</code>: The method used to authenticate the Client with the Provider.<br>The supported values are <strong>client_secret_basic</strong>, <strong>client_secret_post</strong>, <strong>private_key_jwt</strong>, <strong>client_secret_jwt</strong> and <strong>none</strong> <a href="https://tools.ietf.org/html/rfc6749#section-2.1" target="_blank" rel="noopener noreferrer">(public clients)<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.</td></tr> <tr><td><strong>5</strong></td> <td><code>authorizationGrantType</code>: The OAuth 2.0 Authorization Framework defines four <a href="https://tools.ietf.org/html/rfc6749#section-1.3" target="_blank" rel="noopener noreferrer">Authorization Grant<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> types.<br>The supported values are <code>authorization_code</code>, <code>client_credentials</code>, <code>password</code>, as well as, extension grant type <code>urn:ietf:params:oauth:grant-type:jwt-bearer</code>.</td></tr> <tr><td><strong>6</strong></td> <td><code>redirectUri</code>: The client’s registered redirect URI that the <em>Authorization Server</em> redirects the end-user’s user-agent<br>to after the end-user has authenticated and authorized access to the client.</td></tr> <tr><td><strong>7</strong></td> <td><code>scopes</code>: The scope(s) requested by the client during the Authorization Request flow, such as openid, email, or profile.</td></tr> <tr><td><strong>8</strong></td> <td><code>clientName</code>: A descriptive name used for the client.<br>The name may be used in certain scenarios, such as when displaying the name of the client in the auto-generated login page.</td></tr> <tr><td><strong>9</strong></td> <td><code>authorizationUri</code>: The Authorization Endpoint URI for the Authorization Server.</td></tr> <tr><td><strong>10</strong></td> <td><code>tokenUri</code>: The Token Endpoint URI for the Authorization Server.</td></tr> <tr><td><strong>11</strong></td> <td><code>jwkSetUri</code>: The URI used to retrieve the <a href="https://tools.ietf.org/html/rfc7517" target="_blank" rel="noopener noreferrer">JSON Web Key (JWK)<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> Set from the Authorization Server,<br>which contains the cryptographic key(s) used to verify the <a href="https://tools.ietf.org/html/rfc7515" target="_blank" rel="noopener noreferrer">JSON Web Signature (JWS)<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> of the ID Token and optionally the UserInfo Response.</td></tr> <tr><td><strong>12</strong></td> <td><code>issuerUri</code>: Returns the issuer identifier uri for the OpenID Connect 1.0 provider or the OAuth 2.0 Authorization Server.</td></tr> <tr><td><strong>13</strong></td> <td><code>configurationMetadata</code>: The <a href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfig" target="_blank" rel="noopener noreferrer">OpenID Provider Configuration Information<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.<br>This information will only be available if the Spring Boot 2.x property <code>spring.security.oauth2.client.provider.[providerId].issuerUri</code> is configured.</td></tr> <tr><td><strong>14</strong></td> <td><code>(userInfoEndpoint)uri</code>: The UserInfo Endpoint URI used to access the claims/attributes of the authenticated end-user.</td></tr> <tr><td><strong>15</strong></td> <td><code>(userInfoEndpoint)authenticationMethod</code>: The authentication method used when sending the access token to the UserInfo Endpoint.<br>The supported values are <strong>header</strong>, <strong>form</strong> and <strong>query</strong>.</td></tr> <tr><td><strong>16</strong></td> <td><code>userNameAttributeName</code>: The name of the attribute returned in the UserInfo Response that references the Name or Identifier of the end-user.</td></tr></tbody></table> <p>A <code>ClientRegistration</code> can be initially configured using discovery of an OpenID Connect Provider’s <a href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfig" target="_blank" rel="noopener noreferrer">Configuration endpoint<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> or an Authorization Server’s <a href="https://tools.ietf.org/html/rfc8414#section-3" target="_blank" rel="noopener noreferrer">Metadata endpoint<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.</p> <p><code>ClientRegistrations</code> provides convenience methods for configuring a <code>ClientRegistration</code> in this way, as can be seen in the following example:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>ClientRegistration clientRegistration =
	ClientRegistrations.fromIssuerLocation(&quot;https://idp.example.com/issuer&quot;).build();
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>val clientRegistration = ClientRegistrations.fromIssuerLocation(&quot;https://idp.example.com/issuer&quot;).build()
</code></pre></div><p>The above code will query in series <code>[https://idp.example.com/issuer/.well-known/openid-configuration](https://idp.example.com/issuer/.well-known/openid-configuration)</code>, and then <code>[https://idp.example.com/.well-known/openid-configuration/issuer](https://idp.example.com/.well-known/openid-configuration/issuer)</code>, and finally <code>[https://idp.example.com/.well-known/oauth-authorization-server/issuer](https://idp.example.com/.well-known/oauth-authorization-server/issuer)</code>, stopping at the first to return a 200 response.</p> <p>As an alternative, you can use <code>ClientRegistrations.fromOidcIssuerLocation()</code> to only query the OpenID Connect Provider’s Configuration endpoint.</p> <h2 id="reactiveclientregistrationrepository"><a href="#reactiveclientregistrationrepository" class="header-anchor">#</a> ReactiveClientRegistrationRepository</h2> <p>The <code>ReactiveClientRegistrationRepository</code> serves as a repository for OAuth 2.0 / OpenID Connect 1.0 <code>ClientRegistration</code>(s).</p> <table><thead><tr><th></th> <th>Client registration information is ultimately stored and owned by the associated Authorization Server.<br>This repository provides the ability to retrieve a sub-set of the primary client registration information, which is stored with the Authorization Server.</th></tr></thead> <tbody></tbody></table> <p>Spring Boot 2.x auto-configuration binds each of the properties under <code>spring.security.oauth2.client.registration.*[registrationId]*</code> to an instance of <code>ClientRegistration</code> and then composes each of the <code>ClientRegistration</code> instance(s) within a <code>ReactiveClientRegistrationRepository</code>.</p> <table><thead><tr><th></th> <th>The default implementation of <code>ReactiveClientRegistrationRepository</code> is <code>InMemoryReactiveClientRegistrationRepository</code>.</th></tr></thead> <tbody></tbody></table> <p>The auto-configuration also registers the <code>ReactiveClientRegistrationRepository</code> as a <code>@Bean</code> in the <code>ApplicationContext</code> so that it is available for dependency-injection, if needed by the application.</p> <p>The following listing shows an example:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>@Controller
public class OAuth2ClientController {

	@Autowired
	private ReactiveClientRegistrationRepository clientRegistrationRepository;

	@GetMapping(&quot;/&quot;)
	public Mono&lt;String&gt; index() {
		return this.clientRegistrationRepository.findByRegistrationId(&quot;okta&quot;)
				...
				.thenReturn(&quot;index&quot;);
	}
}
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>@Controller
class OAuth2ClientController {

    @Autowired
    private lateinit var clientRegistrationRepository: ReactiveClientRegistrationRepository

    @GetMapping(&quot;/&quot;)
    fun index(): Mono&lt;String&gt; {
        return this.clientRegistrationRepository.findByRegistrationId(&quot;okta&quot;)
            ...
            .thenReturn(&quot;index&quot;)
    }
}
</code></pre></div><h2 id="oauth2authorizedclient"><a href="#oauth2authorizedclient" class="header-anchor">#</a> OAuth2AuthorizedClient</h2> <p><code>OAuth2AuthorizedClient</code> is a representation of an Authorized Client.
A client is considered to be authorized when the end-user (Resource Owner) has granted authorization to the client to access its protected resources.</p> <p><code>OAuth2AuthorizedClient</code> serves the purpose of associating an <code>OAuth2AccessToken</code> (and optional <code>OAuth2RefreshToken</code>) to a <code>ClientRegistration</code> (client) and resource owner, who is the <code>Principal</code> end-user that granted the authorization.</p> <h2 id="serveroauth2authorizedclientrepository-reactiveoauth2authorizedclientservice"><a href="#serveroauth2authorizedclientrepository-reactiveoauth2authorizedclientservice" class="header-anchor">#</a> ServerOAuth2AuthorizedClientRepository / ReactiveOAuth2AuthorizedClientService</h2> <p><code>ServerOAuth2AuthorizedClientRepository</code> is responsible for persisting <code>OAuth2AuthorizedClient</code>(s) between web requests.
Whereas, the primary role of <code>ReactiveOAuth2AuthorizedClientService</code> is to manage <code>OAuth2AuthorizedClient</code>(s) at the application-level.</p> <p>From a developer perspective, the <code>ServerOAuth2AuthorizedClientRepository</code> or <code>ReactiveOAuth2AuthorizedClientService</code> provides the capability to lookup an <code>OAuth2AccessToken</code> associated with a client so that it may be used to initiate a protected resource request.</p> <p>The following listing shows an example:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>@Controller
public class OAuth2ClientController {

	@Autowired
	private ReactiveOAuth2AuthorizedClientService authorizedClientService;

	@GetMapping(&quot;/&quot;)
	public Mono&lt;String&gt; index(Authentication authentication) {
		return this.authorizedClientService.loadAuthorizedClient(&quot;okta&quot;, authentication.getName())
				.map(OAuth2AuthorizedClient::getAccessToken)
				...
				.thenReturn(&quot;index&quot;);
	}
}
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>@Controller
class OAuth2ClientController {

    @Autowired
    private lateinit var authorizedClientService: ReactiveOAuth2AuthorizedClientService

    @GetMapping(&quot;/&quot;)
    fun index(authentication: Authentication): Mono&lt;String&gt; {
        return this.authorizedClientService.loadAuthorizedClient&lt;OAuth2AuthorizedClient&gt;(&quot;okta&quot;, authentication.name)
            .map { it.accessToken }
            ...
            .thenReturn(&quot;index&quot;)
    }
}
</code></pre></div><table><thead><tr><th></th> <th>Spring Boot 2.x auto-configuration registers an <code>ServerOAuth2AuthorizedClientRepository</code> and/or <code>ReactiveOAuth2AuthorizedClientService</code> <code>@Bean</code> in the <code>ApplicationContext</code>.<br>However, the application may choose to override and register a custom <code>ServerOAuth2AuthorizedClientRepository</code> or <code>ReactiveOAuth2AuthorizedClientService</code> <code>@Bean</code>.</th></tr></thead> <tbody></tbody></table> <p>The default implementation of <code>ReactiveOAuth2AuthorizedClientService</code> is <code>InMemoryReactiveOAuth2AuthorizedClientService</code>, which stores <code>OAuth2AuthorizedClient</code>(s) in-memory.</p> <p>Alternatively, the R2DBC implementation <code>R2dbcReactiveOAuth2AuthorizedClientService</code> may be configured for persisting <code>OAuth2AuthorizedClient</code>(s) in a database.</p> <table><thead><tr><th></th> <th><code>R2dbcReactiveOAuth2AuthorizedClientService</code> depends on the table definition described in <a href="/servlet/appendix/database-schema.html#dbschema-oauth2-client"> OAuth 2.0 Client Schema</a>.</th></tr></thead> <tbody></tbody></table> <h2 id="reactiveoauth2authorizedclientmanager-reactiveoauth2authorizedclientprovider"><a href="#reactiveoauth2authorizedclientmanager-reactiveoauth2authorizedclientprovider" class="header-anchor">#</a> ReactiveOAuth2AuthorizedClientManager / ReactiveOAuth2AuthorizedClientProvider</h2> <p>The <code>ReactiveOAuth2AuthorizedClientManager</code> is responsible for the overall management of <code>OAuth2AuthorizedClient</code>(s).</p> <p>The primary responsibilities include:</p> <ul><li><p>Authorizing (or re-authorizing) an OAuth 2.0 Client, using a <code>ReactiveOAuth2AuthorizedClientProvider</code>.</p></li> <li><p>Delegating the persistence of an <code>OAuth2AuthorizedClient</code>, typically using a <code>ReactiveOAuth2AuthorizedClientService</code> or <code>ServerOAuth2AuthorizedClientRepository</code>.</p></li> <li><p>Delegating to a <code>ReactiveOAuth2AuthorizationSuccessHandler</code> when an OAuth 2.0 Client has been successfully authorized (or re-authorized).</p></li> <li><p>Delegating to a <code>ReactiveOAuth2AuthorizationFailureHandler</code> when an OAuth 2.0 Client fails to authorize (or re-authorize).</p></li></ul> <p>A <code>ReactiveOAuth2AuthorizedClientProvider</code> implements a strategy for authorizing (or re-authorizing) an OAuth 2.0 Client.
Implementations will typically implement an authorization grant type, eg. <code>authorization_code</code>, <code>client_credentials</code>, etc.</p> <p>The default implementation of <code>ReactiveOAuth2AuthorizedClientManager</code> is <code>DefaultReactiveOAuth2AuthorizedClientManager</code>, which is associated with a <code>ReactiveOAuth2AuthorizedClientProvider</code> that may support multiple authorization grant types using a delegation-based composite.
The <code>ReactiveOAuth2AuthorizedClientProviderBuilder</code> may be used to configure and build the delegation-based composite.</p> <p>The following code shows an example of how to configure and build a <code>ReactiveOAuth2AuthorizedClientProvider</code> composite that provides support for the <code>authorization_code</code>, <code>refresh_token</code>, <code>client_credentials</code> and <code>password</code> authorization grant types:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>@Bean
public ReactiveOAuth2AuthorizedClientManager authorizedClientManager(
		ReactiveClientRegistrationRepository clientRegistrationRepository,
		ServerOAuth2AuthorizedClientRepository authorizedClientRepository) {

	ReactiveOAuth2AuthorizedClientProvider authorizedClientProvider =
			ReactiveOAuth2AuthorizedClientProviderBuilder.builder()
					.authorizationCode()
					.refreshToken()
					.clientCredentials()
					.password()
					.build();

	DefaultReactiveOAuth2AuthorizedClientManager authorizedClientManager =
			new DefaultReactiveOAuth2AuthorizedClientManager(
					clientRegistrationRepository, authorizedClientRepository);
	authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider);

	return authorizedClientManager;
}
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>@Bean
fun authorizedClientManager(
        clientRegistrationRepository: ReactiveClientRegistrationRepository,
        authorizedClientRepository: ServerOAuth2AuthorizedClientRepository): ReactiveOAuth2AuthorizedClientManager {
    val authorizedClientProvider: ReactiveOAuth2AuthorizedClientProvider = ReactiveOAuth2AuthorizedClientProviderBuilder.builder()
            .authorizationCode()
            .refreshToken()
            .clientCredentials()
            .password()
            .build()
    val authorizedClientManager = DefaultReactiveOAuth2AuthorizedClientManager(
            clientRegistrationRepository, authorizedClientRepository)
    authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider)
    return authorizedClientManager
}
</code></pre></div><p>When an authorization attempt succeeds, the <code>DefaultReactiveOAuth2AuthorizedClientManager</code> will delegate to the <code>ReactiveOAuth2AuthorizationSuccessHandler</code>, which (by default) will save the <code>OAuth2AuthorizedClient</code> via the <code>ServerOAuth2AuthorizedClientRepository</code>.
In the case of a re-authorization failure, eg. a refresh token is no longer valid, the previously saved <code>OAuth2AuthorizedClient</code> will be removed from the <code>ServerOAuth2AuthorizedClientRepository</code> via the <code>RemoveAuthorizedClientReactiveOAuth2AuthorizationFailureHandler</code>.
The default behaviour may be customized via <code>setAuthorizationSuccessHandler(ReactiveOAuth2AuthorizationSuccessHandler)</code> and <code>setAuthorizationFailureHandler(ReactiveOAuth2AuthorizationFailureHandler)</code>.</p> <p>The <code>DefaultReactiveOAuth2AuthorizedClientManager</code> is also associated with a <code>contextAttributesMapper</code> of type <code>Function&lt;OAuth2AuthorizeRequest, Mono&lt;Map&lt;String, Object&gt;&gt;&gt;</code>, which is responsible for mapping attribute(s) from the <code>OAuth2AuthorizeRequest</code> to a <code>Map</code> of attributes to be associated to the <code>OAuth2AuthorizationContext</code>.
This can be useful when you need to supply a <code>ReactiveOAuth2AuthorizedClientProvider</code> with required (supported) attribute(s), eg. the <code>PasswordReactiveOAuth2AuthorizedClientProvider</code> requires the resource owner’s <code>username</code> and <code>password</code> to be available in <code>OAuth2AuthorizationContext.getAttributes()</code>.</p> <p>The following code shows an example of the <code>contextAttributesMapper</code>:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>@Bean
public ReactiveOAuth2AuthorizedClientManager authorizedClientManager(
		ReactiveClientRegistrationRepository clientRegistrationRepository,
		ServerOAuth2AuthorizedClientRepository authorizedClientRepository) {

	ReactiveOAuth2AuthorizedClientProvider authorizedClientProvider =
			ReactiveOAuth2AuthorizedClientProviderBuilder.builder()
					.password()
					.refreshToken()
					.build();

	DefaultReactiveOAuth2AuthorizedClientManager authorizedClientManager =
			new DefaultReactiveOAuth2AuthorizedClientManager(
					clientRegistrationRepository, authorizedClientRepository);
	authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider);

	// Assuming the `username` and `password` are supplied as `ServerHttpRequest` parameters,
	// map the `ServerHttpRequest` parameters to `OAuth2AuthorizationContext.getAttributes()`
	authorizedClientManager.setContextAttributesMapper(contextAttributesMapper());

	return authorizedClientManager;
}

private Function&lt;OAuth2AuthorizeRequest, Mono&lt;Map&lt;String, Object&gt;&gt;&gt; contextAttributesMapper() {
	return authorizeRequest -&gt; {
		Map&lt;String, Object&gt; contextAttributes = Collections.emptyMap();
		ServerWebExchange exchange = authorizeRequest.getAttribute(ServerWebExchange.class.getName());
		ServerHttpRequest request = exchange.getRequest();
		String username = request.getQueryParams().getFirst(OAuth2ParameterNames.USERNAME);
		String password = request.getQueryParams().getFirst(OAuth2ParameterNames.PASSWORD);
		if (StringUtils.hasText(username) &amp;&amp; StringUtils.hasText(password)) {
			contextAttributes = new HashMap&lt;&gt;();

			// `PasswordReactiveOAuth2AuthorizedClientProvider` requires both attributes
			contextAttributes.put(OAuth2AuthorizationContext.USERNAME_ATTRIBUTE_NAME, username);
			contextAttributes.put(OAuth2AuthorizationContext.PASSWORD_ATTRIBUTE_NAME, password);
		}
		return Mono.just(contextAttributes);
	};
}
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>@Bean
fun authorizedClientManager(
        clientRegistrationRepository: ReactiveClientRegistrationRepository,
        authorizedClientRepository: ServerOAuth2AuthorizedClientRepository): ReactiveOAuth2AuthorizedClientManager {
    val authorizedClientProvider: ReactiveOAuth2AuthorizedClientProvider = ReactiveOAuth2AuthorizedClientProviderBuilder.builder()
            .password()
            .refreshToken()
            .build()
    val authorizedClientManager = DefaultReactiveOAuth2AuthorizedClientManager(
            clientRegistrationRepository, authorizedClientRepository)
    authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider)

    // Assuming the `username` and `password` are supplied as `ServerHttpRequest` parameters,
    // map the `ServerHttpRequest` parameters to `OAuth2AuthorizationContext.getAttributes()`
    authorizedClientManager.setContextAttributesMapper(contextAttributesMapper())
    return authorizedClientManager
}

private fun contextAttributesMapper(): Function&lt;OAuth2AuthorizeRequest, Mono&lt;MutableMap&lt;String, Any&gt;&gt;&gt; {
    return Function { authorizeRequest -&gt;
        var contextAttributes: MutableMap&lt;String, Any&gt; = mutableMapOf()
        val exchange: ServerWebExchange = authorizeRequest.getAttribute(ServerWebExchange::class.java.name)!!
        val request: ServerHttpRequest = exchange.request
        val username: String? = request.queryParams.getFirst(OAuth2ParameterNames.USERNAME)
        val password: String? = request.queryParams.getFirst(OAuth2ParameterNames.PASSWORD)
        if (StringUtils.hasText(username) &amp;&amp; StringUtils.hasText(password)) {
            contextAttributes = hashMapOf()

            // `PasswordReactiveOAuth2AuthorizedClientProvider` requires both attributes
            contextAttributes[OAuth2AuthorizationContext.USERNAME_ATTRIBUTE_NAME] = username!!
            contextAttributes[OAuth2AuthorizationContext.PASSWORD_ATTRIBUTE_NAME] = password!!
        }
        Mono.just(contextAttributes)
    }
}
</code></pre></div><p>The <code>DefaultReactiveOAuth2AuthorizedClientManager</code> is designed to be used <em><strong>within</strong></em> the context of a <code>ServerWebExchange</code>.
When operating <em><strong>outside</strong></em> of a <code>ServerWebExchange</code> context, use <code>AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager</code> instead.</p> <p>A <em>service application</em> is a common use case for when to use an <code>AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager</code>.
Service applications often run in the background, without any user interaction, and typically run under a system-level account instead of a user account.
An OAuth 2.0 Client configured with the <code>client_credentials</code> grant type can be considered a type of service application.</p> <p>The following code shows an example of how to configure an <code>AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager</code> that provides support for the <code>client_credentials</code> grant type:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>@Bean
public ReactiveOAuth2AuthorizedClientManager authorizedClientManager(
		ReactiveClientRegistrationRepository clientRegistrationRepository,
		ReactiveOAuth2AuthorizedClientService authorizedClientService) {

	ReactiveOAuth2AuthorizedClientProvider authorizedClientProvider =
			ReactiveOAuth2AuthorizedClientProviderBuilder.builder()
					.clientCredentials()
					.build();

	AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager authorizedClientManager =
			new AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager(
					clientRegistrationRepository, authorizedClientService);
	authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider);

	return authorizedClientManager;
}
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>@Bean
fun authorizedClientManager(
        clientRegistrationRepository: ReactiveClientRegistrationRepository,
        authorizedClientService: ReactiveOAuth2AuthorizedClientService): ReactiveOAuth2AuthorizedClientManager {
    val authorizedClientProvider: ReactiveOAuth2AuthorizedClientProvider = ReactiveOAuth2AuthorizedClientProviderBuilder.builder()
            .clientCredentials()
            .build()
    val authorizedClientManager = AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager(
            clientRegistrationRepository, authorizedClientService)
    authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider)
    return authorizedClientManager
}
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