<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi,</div>
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<div>I'm using Shibboleth IdP 4.0.1 with multiple Shibboleth Service Providers using it successfull. Now an external CAS-server should be added as additional authentication plattform. As I used shib-cas-authn2 with IdP 2.x the last years successfull I tried to use shib-cas-authn3, installed it as described here:<br/>
https://github.com/Unicon/shib-cas-authn3</div>
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<div>With shib-cas-authn2 I had to add the AuthnContext on SP-side with:</div>
<div>ShibRequestSetting authnContextClassRef urn:oasis:names:tc:SAML:2.0:ac:classes:casname</div>
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<div>Now i'm unsure how to call the IdP in version 4 with shib-cas-authn3 to initiate a proper authnContext for CAS. I tried it with the following direct GET-Request:</div>
<div>https://SHIBSERV/idp/Authn/External?conversation=e1s1&entityId=CASSERV</div>
<div>but get this error:</div>
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<div>Caused by: org.springframework.webflow.execution.repository.NoSuchFlowExecutionException: No flow execution could be found with key 'e1s1' -- perhaps this executing flow has ended or expired? This could happen if your users are relying on browser history (typically via the back button) that references ended flows.</div>
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<div>How can I initiate the CAS-authnContext?</div>
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<div>Thanks in advanded</div>
<div>Thomas</div></div></body></html>