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Interfederation Technical Policy Rules

Metadata Import Policy

Basic Metadata Import Policy

Global metadata is imported directly into the main production aggregate.

The following import rules have been implemented (in order):

  1. Filter all imported entities with XML attribute mdrpi:RegistrationInfo[@registrationAuthority='https://incommon.org']
    1. Entities so marked must come from primary sources only.
  2. Filter all entity attributes not on the Entity Attribute Whitelist (see subsection below)
  3. Filter all imported entities with weak keys
    1. The use of weak keys in metadata has security and privacy implications.
    2. There are no weak keys in InCommon metadata and so we'd like to keep it that way.
  4. Filter all imported IdP entities that do not have a SAML2 SingleSignOnService endpoint that supports the HTTP-Redirect binding.
    1. In effect, all imported IdPs must support SAML2.
  5. Filter all imported SP entities that do not have at least one SAML2 AssertionConsumerService endpoint that supports the HTTP-POST binding.
    1. In effect, all imported SPs must support SAML2.
  6. Filter all imported entities that have the same entityID as an existing entity in the InCommon aggregate.
    1. This happens because some SPs choose to join multiple federations.
    2. Dozens of global SPs are filtered by this rule.

A number of additional rules are applied to ensure metadata correctness. Some common minor errors are corrected but entities failing checks such as XML schema validity are removed.

Log all of the following:

  • entities filtered by an import rule
  • entities removed for lack of schema validity
  • entities modified in any way

Entity Attribute Whitelist

  1. (name, value) = (http://macedir.org/entity-category, http://refeds.org/category/research-and-scholarship)
  2. (name, value) = (http://macedir.org/entity-category-support, http://refeds.org/category/research-and-scholarship)
  3. (name, value) = (http://macedir.org/entity-category, http://refeds.org/category/hide-from-discovery)

Metadata Export Policy

Basic Metadata Export Policy

InCommon Operations refreshes the export aggregate daily, in conjunction with the daily metadata-signing process.

  1. IdPs are exported by default (but may choose to opt out)
  2. SPs actively opt in to the export process

 InCommon Operations reserves the right to prevent any entity from being exported.

The following export rules have been implemented:

  1. Filter all entities not having XML attribute mdrpi:RegistrationInfo[@registrationAuthority='https://incommon.org']
    1. Only entities registered by InCommon will be exported.
  2. Filter the legacy incommon.org R&S entity attribute value from exported SP entity metadata:
    1. http://id.incommon.org/category/research-and-scholarship
    2. This legacy attribute value remains in SP metadata for backwards compatibility only. We intend to completely remove this attribute value from SP metadata in the future.
    3. This legacy attribute value has nothing to do with R&S interoperability outside of the InCommon Federation.
  3. Filter SAML1-only entities:
    1. An SP entity not having at least one SAML2 AssertionConsumerService endpoint that supports the HTTP-POST binding will not be exported.
    2. An IdP entity not having a SAML2 SingleSignOnService endpoint that supports the HTTP-Redirect binding will not be exported.
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