I’m trying to set up CAS 5.3.2 so that it delegates authentication to Azure AD via SAML2. I’ve seen documentation on how to delegate authentication to an external SAML2 IdP, and I’ve read the tutorial (https://apereo.github.io/2017/03/22/cas51-delauthn-tutorial/). The tutorial showed how to set it up with Okta as the IdP, and I’m assuming that works. However, Azure AD gives me an error message that the authentication request is not a valid SAML2 protocol message.
Here is the configuration I have in the cas.properties file: cas.authn.pac4j.saml[0].keystorePassword=****** cas.authn.pac4j.saml[0].privateKeyPassword=****** cas.authn.pac4j.saml[0].keystorePath=file:/etc/cas/saml/samlKeystore.jks cas.authn.pac4j.saml[0].keystoreAlias=******** cas.authn.pac4j.saml[0].serviceProviderEntityId=https://xxxxxxxx.yyyyyyyyyyyyy.edu cas.authn.pac4j.saml[0].serviceProviderMetadataPath=file:/etc/cas/saml/xxxxxxxx.xml # Path/URL to delegated IdP metadata cas.authn.pac4j.saml[0].identityProviderMetadataPath=file:/etc/cas/saml/AzureADCAS.xml Here is an example authentication request that Microsoft says is valid in their documentation: <samlp:AuthnRequest xmlns="urn:oasis:names:tc:SAML:2.0:metadata" ID="id6c1c178c166d486687be4aaf5e482730" Version="2.0" IssueInstant="2013-03-18T03:28:54.1839884Z" xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"> <Issuer xmlns="urn:oasis:names:tc:SAML:2.0:assertion">https://www.contoso.com</Issuer> </samlp:AuthnRequest> Here is an authentication request generated by CAS via pac4j: <?xml version="1.0" encoding="UTF-8"?> <saml2p:AuthnRequest AssertionConsumerServiceURL="https://xxxxxxxx.yyyyyyyyyyyyy.edu:8443/cas/login?client_name=SAML2Client0"; AttributeConsumingServiceIndex="0" Destination="https://login.microsoftonline.com/cad830e4-554f-4361-bae5-c865233fb77f/saml2"; ForceAuthn="false" ID="_2nqagio59j7csvzqzu0mynfr4tsbfqzhnlleupl" IsPassive="false" IssueInstant="2018-08-02T21:50:33.174Z" ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" ProviderName="pac4j-saml" Version="2.0" xmlns:saml2p="urn:oasis:names:tc:SAML:2.0:protocol"> <saml2:Issuer Format="urn:oasis:names:tc:SAML:2.0:nameid-format:entity" NameQualifier="https://xxxxxxxx.yyyyyyyyyyyyy.edu"; xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion"> https://xxxxxxxx.yyyyyyyyyyyyy.edu </saml2:Issuer> </saml2p:AuthnRequest> Here is the error message I’m getting from Azure: Request Id: 75ca32eb-47cb-426a-992d-ee70fc6a1b00 Correlation Id: 996cb2e6-b6b3-4077-abaa-a76e2578255a Timestamp: 2018-08-02T21:50:33Z Message: AADSTS75005: The request is not a valid Saml2 protocol message. Advanced diagnostics: Enable If you plan on getting support for an issue, turn this on and try to reproduce the error. This will collect additional information that will help troubleshoot the issue. Root cause: Azure AD doesn’t support the SAML request sent by the application for Single sign-on. Some common issues are: · Missing required fields in the SAML request · SAML request encoded method If anyone has been able to get SAML2 delegated authentication working with Azure AD as the IdP, or if you know why it won’t work, I would appreciate any information you can supply. Lynn Dickison Senior Enterprise Systems Administrator Computer Services Missouri State University 901 S. National Ave. Springfield, MO 65897 Phone: 417-836-4515 | Fax: 417-836-3192 [email protected]<mailto:[email protected]> | www.missouristate.edu<http://www.missouristate.edu/> [Missouri State University: Make Your Missouri Statement]<http://www.missouristate.edu/> -- - Website: https://apereo.github.io/cas - Gitter Chatroom: https://gitter.im/apereo/cas - List Guidelines: https://goo.gl/1VRrw7 - Contributions: https://goo.gl/mh7qDG --- You received this message because you are subscribed to the Google Groups "CAS Community" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/apereo.org/d/msgid/cas-user/SN6PR01MB4191ED2D9B0F83BCA08E9682D92C0%40SN6PR01MB4191.prod.exchangelabs.com.
