java - 如何使用 Spring Security SAML 配置远程发现？

Question

我正在尝试配置 Spring Security SAML 1.0.1 以访问位于 https://discovery.renater.fr/test 的远程发现服务.相反，达到了“CachingMetadataManager”的属性 defaultIDP 中指定的 IDP。

在Spring Security SAML 1.0.1 documentation ，我们可以读到:

Remote discovery service

In order to enable external IDP discovery service, configure property idpDiscoveryURL in your local SP extended metadata to the external discovery URL. Make sure property idpDiscoveryEnabled is set to true. The remote discovery service needs to support the Identity Provider Discovery Service Protocol and Profile.

这是我生成 SP 元数据的方式:

<!-- Filter automatically generates default SP metadata -->
<b:bean id="metadataGeneratorFilter" class="org.springframework.security.saml.metadata.MetadataGeneratorFilter">
    <b:constructor-arg>
        <b:bean class="org.springframework.security.saml.metadata.MetadataGenerator">
            <b:property name="includeDiscoveryExtension" value="true"/>
            <b:property name="extendedMetadata">
                <b:bean class="org.springframework.security.saml.metadata.ExtendedMetadata">
                    <b:property name="idpDiscoveryEnabled" value="true"/>
                    <b:property name="idpDiscoveryURL" value="https://discovery.renater.fr/test"/>
                    <b:property name="idpDiscoveryResponseURL" value="http://acem.u-bretagneloire.fr/ACEM/saml/login/alias/defaultAlias?disco=true"/>
                </b:bean>
            </b:property>
        </b:bean>
    </b:constructor-arg>
</b:bean>

可以看出，我已将 bean MetadataGenerator 中的属性 includeDiscoveryExtension 设置为 true。我还在 bean ExtendedMetadata 中设置了属性 idpDiscoveryEnabled、idpDiscoveryURL 和 idpDiscoveryResponseURL。但是，当我将应用程序的日志级别设置为“TRACE”时，idpDiscoveryURL 值永远不会显示。

问题:我的配置中缺少什么来访问发现 URL？

---

完整的 Spring SAML 配置文件是:

<?xml version="1.0" encoding="UTF-8" ?>
<b:beans xmlns:b="http://www.springframework.org/schema/beans"
   xmlns="http://www.springframework.org/schema/security"
   xmlns:p="http://www.springframework.org/schema/p"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context="http://www.springframework.org/schema/context"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
          http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd
          http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- Enable auto-wiring -->
<context:annotation-config/>

<!-- Scan for auto-wiring classes in spring saml packages -->
<context:component-scan base-package="org.springframework.security.saml"/>

<!-- 
<http security="none" pattern="/favicon.ico"/>
<http security="none" pattern="/images/**"/>
<http security="none" pattern="/css/**"/>
<http security="none" pattern="/logout.jsp"/>
-->
<!-- Security for the administration UI -->
<http pattern="/saml/web/**" use-expressions="false">
    <access-denied-handler error-page="/saml/web/metadata/login"/>
    <form-login login-processing-url="/saml/web/login" login-page="/saml/web/metadata/login" default-target-url="/saml/web/metadata"/>
    <intercept-url pattern="/saml/web/metadata/login" access="IS_AUTHENTICATED_ANONYMOUSLY"/>
    <intercept-url pattern="/saml/web/**" access="ROLE_ADMIN"/>
    <custom-filter before="FIRST" ref="metadataGeneratorFilter"/>
</http>

<!-- Secured pages with SAML as entry point -->
<!-- 
<http entry-point-ref="samlEntryPoint" use-expressions="false">
    <intercept-url pattern="/**" access="IS_AUTHENTICATED_FULLY"/>
    <custom-filter before="FIRST" ref="metadataGeneratorFilter"/>
    <custom-filter after="BASIC_AUTH_FILTER" ref="samlFilter"/>
</http>
-->
<http entry-point-ref="samlEntryPoint"  use-expressions="true" auto-config="true">
    <!-- For Spring Security 4.x, we need to disable csrf, otherwise AJAX requests get 403:-->
    <csrf disabled="true"/>
    <intercept-url access="permitAll" pattern="/" /><!-- To permit "/" allows the use of web.xml's <welcome-file> -->
    <intercept-url access="permitAll" pattern="/home" />
    <intercept-url access="permitAll" pattern="/pages/exceptions/**" />
    <intercept-url access="permitAll" pattern="/javax.faces.resource/**" />
    <intercept-url access="permitAll" pattern="/resources/**" />
    <intercept-url access="hasRole('ROLE_ADMIN')" pattern="/administration/**" />
    <intercept-url access="hasRole('ROLE_ADMIN')" pattern="/rest/**" />
    <intercept-url access="isAuthenticated()" pattern="/**"/><!-- When the user is authentificated by the IDP, but doesn't exist in the application database -->
    <form-login login-page="/login-page-should-not-be-generated-when-using-saml" />
    <logout logout-url="/logout" logout-success-url="/home"/>
    <custom-filter before="FIRST" ref="metadataGeneratorFilter"/>
    <custom-filter after="BASIC_AUTH_FILTER" ref="samlFilter"/>
</http>

<!-- Filters for processing of SAML messages -->
<b:bean id="samlFilter" class="org.springframework.security.web.FilterChainProxy">
    <filter-chain-map request-matcher="ant">
        <filter-chain pattern="/saml/login/**" filters="samlEntryPoint"/>
        <filter-chain pattern="/saml/logout/**" filters="samlLogoutFilter"/>
        <filter-chain pattern="/saml/metadata/**" filters="metadataDisplayFilter"/>
        <filter-chain pattern="/saml/SSO/**" filters="samlWebSSOProcessingFilter"/>
        <filter-chain pattern="/saml/SSOHoK/**" filters="samlWebSSOHoKProcessingFilter"/>
        <filter-chain pattern="/saml/SingleLogout/**" filters="samlLogoutProcessingFilter"/>
        <filter-chain pattern="/saml/discovery/**" filters="samlIDPDiscovery"/>
    </filter-chain-map>
</b:bean>

<!-- Handler deciding where to redirect user after successful login -->
<b:bean id="successRedirectHandler"
      class="org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler">
    <b:property name="defaultTargetUrl" value="/"/>
    <b:property name="alwaysUseDefaultTargetUrl" value="true"/>
</b:bean>
<!--
Use the following for interpreting RelayState coming from unsolicited response as redirect URL:
<b:bean id="successRedirectHandler" class="org.springframework.security.saml.SAMLRelayStateSuccessHandler">
   <b:property name="defaultTargetUrl" value="/" />
</b:bean>
-->

<!-- Handler deciding where to redirect user after failed login -->
<b:bean id="failureRedirectHandler"
      class="org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler">
    <b:property name="useForward" value="true"/>
    <b:property name="defaultFailureUrl" value="/error.jsp"/>
</b:bean>

<!-- Handler for successful logout -->
<b:bean id="successLogoutHandler" class="org.springframework.security.web.authentication.logout.SimpleUrlLogoutSuccessHandler">
    <b:property name="defaultTargetUrl" value="/logout.jsp"/>
</b:bean>

<authentication-manager alias="authenticationManager">
    <!-- Register authentication manager for SAML provider -->
    <authentication-provider ref="authProvider"/>
    <!-- Register authentication manager for administration UI -->
    <authentication-provider>
        <user-service id="adminInterfaceService">
            <user name="admin" password="admin" authorities="ROLE_ADMIN"/>
        </user-service>
    </authentication-provider>
</authentication-manager>

<!-- Logger for SAML messages and events -->
<b:bean id="samlLogger" class="org.springframework.security.saml.log.SAMLDefaultLogger"/>

<!-- Central storage of cryptographic keys -->
<b:bean id="keyManager" class="org.springframework.security.saml.key.JKSKeyManager">
    <b:constructor-arg value="classpath:security/samlKeystore.jks"/>
    <b:constructor-arg type="java.lang.String" value="nalle123"/>
    <b:constructor-arg>
        <b:map>
            <b:entry key="apollo" value="nalle123"/>
        </b:map>
    </b:constructor-arg>
    <b:constructor-arg type="java.lang.String" value="apollo"/>
</b:bean>

<!-- Entry point to initialize authentication, default values taken from properties file -->
<b:bean id="samlEntryPoint" class="org.springframework.security.saml.SAMLEntryPoint">
    <b:property name="defaultProfileOptions">
        <b:bean class="org.springframework.security.saml.websso.WebSSOProfileOptions">
            <b:property name="includeScoping" value="false"/>
        </b:bean>
    </b:property>
</b:bean>

<!-- IDP Discovery Service -->
<b:bean id="samlIDPDiscovery" class="org.springframework.security.saml.SAMLDiscovery">
    <b:property name="idpSelectionPath" value="/WEB-INF/security/idpSelection.jsp"/>
</b:bean>

<!-- Filter automatically generates default SP metadata -->
<b:bean id="metadataGeneratorFilter" class="org.springframework.security.saml.metadata.MetadataGeneratorFilter">
    <b:constructor-arg>
        <b:bean class="org.springframework.security.saml.metadata.MetadataGenerator">
            <b:property name="includeDiscoveryExtension" value="true"/>
            <b:property name="extendedMetadata">
                <b:bean class="org.springframework.security.saml.metadata.ExtendedMetadata">
                    <b:property name="idpDiscoveryEnabled" value="true"/>
                    <b:property name="idpDiscoveryURL" value="https://discovery.renater.fr/test"/>
                    <b:property name="idpDiscoveryResponseURL" value="http://acem.u-bretagneloire.fr/ACEM/saml/login/alias/defaultAlias?disco=true"/>
                </b:bean>
            </b:property>
        </b:bean>
    </b:constructor-arg>
</b:bean>

<!-- The filter is waiting for connections on URL suffixed with filterSuffix and presents SP metadata there -->
<b:bean id="metadataDisplayFilter" class="org.springframework.security.saml.metadata.MetadataDisplayFilter"/>

<!-- Configure HTTP Client to accept certificates from the keystore for HTTPS verification -->
<!--
<b:bean class="org.springframework.security.saml.trust.httpclient.TLSProtocolConfigurer">
    <b:property name="sslHostnameVerification" value="default"/>
</b:bean>
-->

<!-- IDP Metadata configuration - paths to metadata of IDPs in circle of 
    trust is here -->
<b:bean id="metadata"
    class="org.springframework.security.saml.metadata.CachingMetadataManager">
    <b:constructor-arg>
        <b:list>
            <b:bean
                class="org.springframework.security.saml.metadata.ExtendedMetadataDelegate">
                <b:constructor-arg>
                    <b:bean
                        class="org.opensaml.saml2.metadata.provider.HTTPMetadataProvider">
                        <!-- URL containing the metadata -->
                        <b:constructor-arg>
                            <b:value type="java.lang.String">https://federation.renater.fr/test/renater-test-metadata.xml</b:value>
                        </b:constructor-arg>
                        <!-- Timeout for metadata loading in ms -->
                        <b:constructor-arg>
                            <b:value type="int">15000</b:value>
                        </b:constructor-arg>
                        <b:property name="parserPool" ref="parserPool" />
                    </b:bean>
                </b:constructor-arg>
                <b:constructor-arg>
                    <!-- Default extended metadata for entities not specified in the map -->
                    <b:bean
                        class="org.springframework.security.saml.metadata.ExtendedMetadata">
                    </b:bean>
                </b:constructor-arg>
                <b:constructor-arg>
                    <!-- Extended metadata for specific IDPs -->
                    <b:map>
                        <b:entry key="http://idp.ssocircle.com">
                            <b:bean
                                class="org.springframework.security.saml.metadata.ExtendedMetadata" />
                        </b:entry>
                    </b:map>
                </b:constructor-arg>
            </b:bean>
        </b:list>
    </b:constructor-arg>
    <!-- OPTIONAL used when one of the metadata files contains information 
        about this service provider -->
    <!-- <b:property name="hostedSPName" value=""/> -->
    <!-- OPTIONAL property: can tell the system which IDP should be used for 
        authenticating user by default. -->
    <b:property name="defaultIDP" value="https://ident-shib-test.univ-rennes1.fr/idp/shibboleth"/>
</b:bean>

<!--
    NOTE: In a real application you should not use an in memory implementation. You will also want
          to ensure to clean up expired tickets by calling ProxyGrantingTicketStorage.cleanup()
 -->
<b:bean id="pgtStorage" class="org.jasig.cas.client.proxy.ProxyGrantingTicketStorageImpl"/>

<!-- SAML Authentication Provider responsible for validating of received SAML messages -->
<b:bean id="authProvider" class="org.springframework.security.saml.SAMLAuthenticationProvider">
    <!-- OPTIONAL property: can be used to store/load user data after login -->
    <b:property name="userDetails">
        <b:bean class="eu.ueb.acem.services.auth.SamlAuthenticationUserDetailsService"/>
    </b:property>
</b:bean>

<!-- Provider of default SAML Context -->
<b:bean id="contextProvider" class="org.springframework.security.saml.context.SAMLContextProviderImpl"/>

<!-- Processing filter for WebSSO profile messages -->
<b:bean id="samlWebSSOProcessingFilter" class="org.springframework.security.saml.SAMLProcessingFilter">
    <b:property name="authenticationManager" ref="authenticationManager"/>
    <b:property name="authenticationSuccessHandler" ref="successRedirectHandler"/>
    <b:property name="authenticationFailureHandler" ref="failureRedirectHandler"/>
</b:bean>

<!-- Processing filter for WebSSO Holder-of-Key profile -->
<b:bean id="samlWebSSOHoKProcessingFilter" class="org.springframework.security.saml.SAMLWebSSOHoKProcessingFilter">
    <b:property name="authenticationManager" ref="authenticationManager"/>
    <b:property name="authenticationSuccessHandler" ref="successRedirectHandler"/>
    <b:property name="authenticationFailureHandler" ref="failureRedirectHandler"/>
</b:bean>

<!-- Logout handler terminating local session -->
<b:bean id="logoutHandler"
      class="org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler">
    <b:property name="invalidateHttpSession" value="false"/>
</b:bean>

<!-- Override default logout processing filter with the one processing SAML messages -->
<b:bean id="samlLogoutFilter" class="org.springframework.security.saml.SAMLLogoutFilter">
    <b:constructor-arg index="0" ref="successLogoutHandler"/>
    <b:constructor-arg index="1" ref="logoutHandler"/>
    <b:constructor-arg index="2" ref="logoutHandler"/>
</b:bean>

<!-- Filter processing incoming logout messages -->
<!-- First argument determines URL user will be redirected to after successful global logout -->
<b:bean id="samlLogoutProcessingFilter" class="org.springframework.security.saml.SAMLLogoutProcessingFilter">
    <b:constructor-arg index="0" ref="successLogoutHandler"/>
    <b:constructor-arg index="1" ref="logoutHandler"/>
</b:bean>

<!-- Class loading incoming SAML messages from httpRequest stream -->
<b:bean id="processor" class="org.springframework.security.saml.processor.SAMLProcessorImpl">
    <b:constructor-arg>
        <b:list>
            <b:ref bean="redirectBinding"/>
            <b:ref bean="postBinding"/>
            <b:ref bean="artifactBinding"/>
            <b:ref bean="soapBinding"/>
            <b:ref bean="paosBinding"/>
        </b:list>
    </b:constructor-arg>
</b:bean>

<!-- SAML 2.0 WebSSO Assertion Consumer -->
<b:bean id="webSSOprofileConsumer" class="org.springframework.security.saml.websso.WebSSOProfileConsumerImpl"/>

<!-- SAML 2.0 Holder-of-Key WebSSO Assertion Consumer -->
<b:bean id="hokWebSSOprofileConsumer" class="org.springframework.security.saml.websso.WebSSOProfileConsumerHoKImpl"/>

<!-- SAML 2.0 Web SSO profile -->
<b:bean id="webSSOprofile" class="org.springframework.security.saml.websso.WebSSOProfileImpl"/>

<!-- SAML 2.0 Holder-of-Key Web SSO profile -->
<b:bean id="hokWebSSOProfile" class="org.springframework.security.saml.websso.WebSSOProfileConsumerHoKImpl"/>

<!-- SAML 2.0 ECP profile -->
<b:bean id="ecpprofile" class="org.springframework.security.saml.websso.WebSSOProfileECPImpl"/>

<!-- SAML 2.0 Logout Profile -->
<b:bean id="logoutprofile" class="org.springframework.security.saml.websso.SingleLogoutProfileImpl"/>

<!-- Bindings, encoders and decoders used for creating and parsing messages -->
<b:bean id="postBinding" class="org.springframework.security.saml.processor.HTTPPostBinding">
    <b:constructor-arg ref="parserPool"/>
    <b:constructor-arg ref="velocityEngine"/>
</b:bean>

<b:bean id="redirectBinding" class="org.springframework.security.saml.processor.HTTPRedirectDeflateBinding">
    <b:constructor-arg ref="parserPool"/>
</b:bean>

<b:bean id="artifactBinding" class="org.springframework.security.saml.processor.HTTPArtifactBinding">
    <b:constructor-arg ref="parserPool"/>
    <b:constructor-arg ref="velocityEngine"/>
    <b:constructor-arg>
        <b:bean class="org.springframework.security.saml.websso.ArtifactResolutionProfileImpl">
            <b:constructor-arg>
                <b:bean class="org.apache.commons.httpclient.HttpClient">
                    <b:constructor-arg>
                        <b:bean class="org.apache.commons.httpclient.MultiThreadedHttpConnectionManager"/>
                    </b:constructor-arg>
                </b:bean>
            </b:constructor-arg>
            <b:property name="processor">
                <b:bean class="org.springframework.security.saml.processor.SAMLProcessorImpl">
                    <b:constructor-arg ref="soapBinding"/>
                </b:bean>
            </b:property>
        </b:bean>
    </b:constructor-arg>
</b:bean>

<b:bean id="soapBinding" class="org.springframework.security.saml.processor.HTTPSOAP11Binding">
    <b:constructor-arg ref="parserPool"/>
</b:bean>

<b:bean id="paosBinding" class="org.springframework.security.saml.processor.HTTPPAOS11Binding">
    <b:constructor-arg ref="parserPool"/>
</b:bean>

<!-- Initialization of OpenSAML library-->
<b:bean class="org.springframework.security.saml.SAMLBootstrap"/>

<!-- Initialization of the velocity engine -->
<b:bean id="velocityEngine" class="org.springframework.security.saml.util.VelocityFactory" factory-method="getEngine"/>

<!-- XML parser pool needed for OpenSAML parsing -->
<b:bean id="parserPool" class="org.opensaml.xml.parse.StaticBasicParserPool" init-method="initialize">
    <b:property name="builderFeatures">
        <b:map>
            <b:entry key="http://apache.org/xml/features/dom/defer-node-expansion" value="false"/>
        </b:map>
    </b:property>
</b:bean>

<b:bean id="parserPoolHolder" class="org.springframework.security.saml.parser.ParserPoolHolder"/>

Answer 1

我终于找到了解决方案并且可以到达发现 URL(它返回一个错误，但它将是 another question)。

对我的问题的解释是属性:

<b:property name="idpDiscoveryEnabled" value="true"/>
<b:property name="idpDiscoveryURL" value="https://discovery.renater.fr/test"/>

必须在 IDP 元数据中设置(在注释为“ map 中未指定实体的默认扩展元数据”的部分中)，而不是像我所做的那样在 SP 元数据中设置。

我必须在 Spring Security SAML's repository on GitHub 中搜索字符串“idpDiscoveryEnabled”找出我做错了什么。

我会建议 Vladimír Schäfer在 Spring Security SAML 的文档中添加更多关于此的信息。因为在 SP 和 IDP 配置中都使用了元数据，所以很容易混合主题并且没有意识到我们在错误的 bean 中设置了属性。

更新:我意识到文档提供的信息可能有误:

Remote discovery service

In order to enable external IDP discovery service, configure property idpDiscoveryURL in your local SP extended metadata to the external discovery URL. Make sure property idpDiscoveryEnabled is set to true. The remote discovery service needs to support the Identity Provider Discovery Service Protocol and Profile.

根据我的经验，粗体部分可能是错误的。