您好我已经开发了用于在OpenAM和WSO2中实现SAML WebSSO的服务提供商，我的要求是使用SAML实现XACML，所以我试着查看可以修改我的身份验证请求的可用配置文件，
我曾使用此个人资料
urn:oasis:names:tc:xacml:2.0:profile:saml2.0:v2:schema:protocol:wd-13
并在securityContext.xml中的samlEntryPoint中添加了此值：
<bean id="samlEntryPoint" class="org.springframework.security.saml.SAMLEntryPoint">
<property name="defaultProfileOptions">
<bean class="org.springframework.security.saml.websso.WebSSOProfileOptions">
<property name="binding" value="urn:oasis:names:tc:xacml:2.0:profile:saml2.0:v2:schema:protocol" />
<property name="includeScoping" value="false" />
</bean>
</property>
</bean>
运行程序后，我会遇到这样的异常：
rg.opensaml.saml2.metadata.provider.MetadataProviderException: User specified binding urn:oasis:names:tc:xacml:2.0:profile:saml2.0:v2:schema:protocol is not supported by the IDP using profile urn:oasis:names:tc:SAML:2.0:profiles:SSO:browser
at org.springframework.security.saml.websso.WebSSOProfileImpl.getSingleSignOnService(WebSSOProfileImpl.java:147)
at org.springframework.security.saml.websso.WebSSOProfileImpl.sendAuthenticationRequest(WebSSOProfileImpl.java:87)
at org.springframework.security.saml.SAMLEntryPoint.initializeSSO(SAMLEntryPoint.java:226)
at org.springframework.security.saml.SAMLEntryPoint.commence(SAMLEntryPoint.java:153)
at org.springframework.security.saml.SAMLEntryPoint.doFilter(SAMLEntryPoint.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:166)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.saml.metadata.MetadataGeneratorFilter.doFilter(MetadataGeneratorFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
请帮助我做些什么来解决它，以及是否有任何其他方法来修改auth请求，以便为xacml和saml请求修改身份验证请求。