Bill,

In `cas.properties`, in your LDAP section, you want a property like this:

    
cas.authn.ldap[0].principalAttributeList=uid,givenName,sn:surname,mail:email,memberOf

That says that the principal that is authenticated should get the above list of 
LDAP attributes.  For the ones that have 2 items separated by a colon, that is 
just a rename from the LDAP attribute to the name that will be exposed via CAS.

In your service file for an individual service, you specify what attributes 
from the above list you want to release.  The following sections from a service 
file are an example:

      "attributeReleasePolicy" : {
        "@class" : 
"org.apereo.cas.services.ReturnAllowedAttributeReleasePolicy",
        "attributeFilter" : {
          "@class": 
"org.apereo.cas.services.support.RegisteredServiceMappedRegexAttributeFilter",
          "patterns": {
              "@class" : "java.util.HashMap",
              "memberOf": "cn=administrators,ou=groups,dc=example,dc=org"
          },
          "excludeUnmappedAttributes": false,
          "completeMatch": false,
          "order": 0
        },
        "allowedAttributes" : [ "java.util.ArrayList",
            [
                "uid",
                "memberOf",
                "email",
                "givenName",
                "surname"
            ]
        ]
      },

The "attributeReleasePolicy" is used to filer the "memberOf" attribute down to 
a specific value (because he attribute is multi-valued, and you usually only 
want to release only one or a few of the values to a service).  The 
"allowedAttributes" section specifies what attributes from the principal will 
be released at all.

Thanks,
Carl Waldbieser
ITS Identity Management
Lafayette College

----- Original Message -----
From: "Bill Scully" <fwscu...@gmail.com>
To: "cas-user" <cas-user@apereo.org>
Sent: Friday, 31 August, 2018 15:00:09
Subject: [cas-user] CAS 5.2 Passing LDAP Attributes to Application

Hi,

I'm having a hard time getting my head around where to start configuring 
CAS to provide LDAP attributes to the "RegisteredService" / application 
after authentication.  I'm assuming there are 2 areas that I need to 
configure, cas.properties and service JSON files, but navigating the 
documentation to find what I need has been beyond me up to this point.

Can someone kindly point me to the right areas 
of https://apereo.github.io/cas/5.2.x/ or give me some tips on where I can 
figure out how to retrieve certain attributes from LDAP and share those 
selected values with the application?  I hope I'm using "application" 
properly.

Thanks,

Bill

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