This add on module for SimpleSAMLphp augments SAML20-SP matadata that have been fetched by MetaRefresh. Elements are added either based on entityId or on [entity category] (http://macedir.org/entity-category). If specified by entity category fields in the metadata dominate otherwise the template fields overwrite fields in the imported metadata.

Superfluous metadata elements can be stripped to save space.

Merged metadata are written to metadata-generated/saml20-sp-merged.php. After a plausibility check they are moved to the destination specified in the configuration.

Configuration files are located in the metamerge/config directory:

• config.php specifies the metadata source, its fingerprint and the path of the merged data relative to the metadata directory.
• saml20-sp-mixin.php specifies the transformation process:
  • fieldsToStrip is an array of element names to remove.
  • defaultTemplate is used for entities that have no match in the template array.
  • template is an array of templates indexed by entityId or entity category.
  • attributes.allowed restricts the set of attributes that may be released. For use in category templates to avoid unwanted attribute releases.
  • attributes.allowed.ifRequired lists attributes that may only be released if they are marked as required. For use in category templates to avoid unwanted attribute releases.

Usage: Enable the MetaRefresh module and call metamerge/bin/fetchFederationMetadata.php in a cron job.