Al,

I think the null pointer is on the bypass check rather than something about the 
list of attributes.
It is possible that SAML IdP adds a slightly different flow; maybe it does not 
check for null.

Can you use a groovy script?

Ray
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From: [email protected] <[email protected]> on behalf of Al Brussey Jr. 
<[email protected]>
Sent: 17 June 2024 12:18
To: CAS Community <[email protected]>
Subject: [cas-user] 7.0.4 SAML and Duo Bypass

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Not sure if this is a weird local config or some sort of bug.

I have these set globally in cas.properties.

cas.authn.mfa.duo[0].bypass.principal-attribute-name=mfaDisable
cas.authn.mfa.duo[0].bypass.principal-attribute-value=nomfa

When SAML IdP support is included in the WAR overlay with:
implementation "org.apereo.cas:cas-server-support-saml-idp",
I get a NullPointerException after the Duo Push when the mfaDisable attribute 
is null.
and I include it in the list of released attributes in the service definition 
like this:

  "attributeReleasePolicy" : {
    "@class" : "org.apereo.cas.services.ReturnAllowedAttributeReleasePolicy",
    "allowedAttributes" : [ "java.util.ArrayList", [ "cn", "mail", "sn", "uid", 
"displayName", "memberOf",  "mfaDisable", "sAMAccountName", "departmentNumber" 
] ]
  }

If I remove it from this list, there is no exception.  The departmentNumber 
attribute is also null and does not trigger the exception.
If the mfaDisable attribute has a value, the exception is not triggered.

Also, if I remove SAML IdP support from the WAR overlay, it does not trigger an 
exception.

My workaround for now is to remove the mfaDisable attribute while keeping SAML 
support.

Any ideas?



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