Releasing attribute to SP's with 2 different source dependencies

[Lipscomb, Gary]

Hi all,

We are currently upgrading from idpv2 to idpv3 and in the process are cleaning up some of the legacy non-standard use of attributes. Our SP's have been notified of the changes and have had over 12 months to make the changes. As usual there is one who hasn't and won't be able to by the date we wish to go live. We are also simplifying our LDAP instances and removing our customised schema definitions as well.

In our v2 we defined EPPN as (not following the definition)

  <resolver:AttributeDefinition id="eduPersonPrincipalName" xsi:type="Simple" xmlns="urn:mace:shibboleth:2.0:resolver:ad"
    sourceAttributeID="csuPartyId">
    <resolver:Dependency ref="ldap" />
    <resolver:DisplayName xml:lang="en">Global Username (EPPN)</resolver:DisplayName>
    <resolver:AttributeEncoder xsi:type="SAML1String" xmlns="urn:mace:shibboleth:2.0:attribute:encoder"
      name="urn:mace:dir:attribute-def:eduPersonPrincipalName" />
    <resolver:AttributeEncoder xsi:type="SAML2String" xmlns="urn:mace:shibboleth:2.0:attribute:encoder"
      name="urn:oid:1.3.6.1.4.1.5923.1.1.1.6" friendlyName="eduPersonPrincipalName" />
  </resolver:AttributeDefinition>

We replaced this with another attribute schacPersonalUniqueID and released this as well to the appropriate SP's so they could make the necessary code changes. Not done by this particular SP.

In v3 we are still releasing schacPersonalUniqueID as well as a corrected version of EPPN

  <AttributeDefinition xsi:type="Scoped"
      id="eduPersonPrincipalName"
      scope="%{idp.scope}"
      sourceAttributeID="uid">
    <Dependency ref="uid" />
    <DisplayName xml:lang="en">Principal Name (ePPN)</DisplayName>
    <AttributeEncoder xsi:type="SAML1ScopedString" name="urn:mace:dir:attribute-def:eduPersonPrincipalName"/>
    <AttributeEncoder xsi:type="SAML2ScopedString" name="urn:oid:1.3.6.1.4.1.5923.1.1.1.6" friendlyName="eduPersonPrincipalName"/>
  </AttributeDefinition>


Is it possible to release the v2 EPPN attribute to only one SP with the same ID?
Do you just give it another name but use the same encoder definitions?  Would this work as shown below?

  <resolver:AttributeDefinition id="EPPN-CSUpartyID" xsi:type="Simple" xmlns="urn:mace:shibboleth:2.0:resolver:ad"
    sourceAttributeID="csuPartyId">
    <resolver:Dependency ref="ldap" />
    <resolver:DisplayName xml:lang="en">Global Username (EPPN)</resolver:DisplayName>
    <resolver:AttributeEncoder xsi:type="SAML1String" xmlns="urn:mace:shibboleth:2.0:attribute:encoder"
      name="urn:mace:dir:attribute-def:eduPersonPrincipalName" />
    <resolver:AttributeEncoder xsi:type="SAML2String" xmlns="urn:mace:shibboleth:2.0:attribute:encoder"
      name="urn:oid:1.3.6.1.4.1.5923.1.1.1.6" friendlyName="eduPersonPrincipalName" />
  </resolver:AttributeDefinition>



Regards
Gary


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