SAML2 Attribute Release

Attribute filtering and release policies are defined per SAML service. See this guide for more info.

  • A specific attribute release policy is available to release the attribute bundles needed for InCommon Research and Scholarship service providers using the entity attribute value http://id.incommon.org/category/research-and-scholarship:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ChainingAttributeReleasePolicy",
    "policies": [ "java.util.ArrayList",
      [
         {
           "@class": "org.apereo.cas.support.saml.services.InCommonRSAttributeReleasePolicy",
           "useUniformResourceName": false
         }
      ]
    ]
  }
}

    Attributes authorized for release are set to be eduPersonPrincipalName, eduPersonTargetedID, mail, displayName, givenName, surname, eduPersonScopedAffiliation.

  • A specific attribute release policy is available to release the attribute bundles needed for REFEDS Research and Scholarship service providers using the entity attribute value http://refeds.org/category/research-and-scholarship:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ChainingAttributeReleasePolicy",
    "policies": [ "java.util.ArrayList",
      [
         {"@class": "org.apereo.cas.support.saml.services.RefedsRSAttributeReleasePolicy"}
      ]
    ]
  }
}

    This policy is an extension of InCommonRSAttributeReleasePolicy that operates based on different entity attribute value.

  • If you do not have pre-calculated values for the eduPersonTargetedID attribute to fetch before release, you can let CAS calculate the eduPersonTargetedID attribute dynamically at release time using the following policy:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.EduPersonTargetedIdAttributeReleasePolicy",
    "salt": "OqmG80fEKBQt",
    "attribute": "",
    "useUniformResourceName": false
  }
}

    The generated id may be based off of an existing principal attribute. If left unspecified or attribute not found, the authenticated principal id is used. You can also control whether the final generated attribute should be named urn:oid:1.3.6.1.4.1.5923.1.1.1.10 or eduPersonTargetedID via the useUniformResourceName setting.

  • This policy allows a Groovy script to calculate the collection of released attributes.

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.GroovySamlRegisteredServiceAttributeReleasePolicy",
    "groovyScript": "file:/etc/cas/config/script.groovy"
  }
}

    The configuration of this component qualifies to use the Spring Expression Language syntax.

    The outline of the script may be designed as:

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    import java.util.*
import org.apereo.cas.support.saml.services.*
import org.apereo.cas.support.saml.*

Map<String, Object> run(final Object... args) {
    def (attributes,service,resolver,facade,entityDescriptor,applicationContext,logger) = args
    ...
    return null;
}

    The following parameters are passed to the script:

    Parameter Description
    attributes Map of current attributes resolved and available for release.
    service The SAML service definition matched in the service registry.
    resolver The metadata resolver instance of this service provider.
    facade A wrapper on top of the metadata resolver that allows access to utility functions.
    entityDescriptor The EntityDescriptor object matched and linked to this service provider’s metadata.
    applicationContext CAS application context allowing direct access to beans, etc.
    logger The object responsible for issuing log messages such as logger.info(...).

    An example script follows:

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    import java.util.*
import org.apereo.cas.support.saml.services.*
import org.apereo.cas.support.saml.*

def run(final Object... args) {
    def (attributes,service,resolver,facade,entityDescriptor,applicationContext,logger) = args
    if (entityDescriptor.entityId == "TestingSAMLApplication") {
      return [username:["something"], another:"attribute"]
    }
    return [:]
}

    To prepare CAS to support and integrate with Apache Groovy, please review this guide.

  • In the event that an aggregate is defined containing multiple entity ids, the below attribute release policy may be used to release a collection of allowed attributes to entity ids grouped together by a regular expression pattern:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.PatternMatchingEntityIdAttributeReleasePolicy",
    "allowedAttributes" : [ "java.util.ArrayList", [ "cn", "mail", "sn" ] ],
    "fullMatch" : true,
    "reverseMatch" : false,
    "entityIds" : "entityId1|entityId2|somewhere.+"
  }
}

  • This attribute release policy authorizes the release of defined attributes, provided the accompanying metadata for the service provider contains attributes that match certain values.

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.MetadataEntityAttributesAttributeReleasePolicy",
    "allowedAttributes" : [ "java.util.ArrayList", [ "cn", "mail", "sn" ] ],
    "entityAttributeValues" : [ "java.util.LinkedHashSet", [ "entity-attribute-value" ] ],
    "entityAttribute" : "http://somewhere.org/category-x",
    "entityAttributeFormat" : "urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"
  }
}

    The specification of entityAttributeFormat is optional.

  • This attribute release policy authorizes the release of defined attributes, based on the accompanying metadata for the service provider having requested attributes as part of its AttributeConsumingService element.

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.MetadataRequestedAttributesAttributeReleasePolicy",
    "useFriendlyName" : false
  }
}

    The useFriendlyName allows the filter to compare the requested attribute’s friendly name with the resolved attribute.

  • This attribute release policy authorizes the release of a subset of attributes if the registration authority specified as a metadata extension produces a successful match.

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.MetadataRegistrationAuthorityAttributeReleasePolicy",
    "registrationAuthority" : "urn:example:.*",
    "allowedAttributes" : [ "java.util.ArrayList", [ "cn", "mail", "sn" ] ]
  }
}

    The registrationAuthority is a regular expression that is matched against the registration authority of the RegistrationInfo element to authorize release of allowed attributes.

  • This attribute release policy authorizes the release of a subset of attributes requested as extensions of the SAML2 authentication request. The intersection of requested attributes and those allowed by the attribute release policy explicitly is evaluated for the final attribute release phase:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.AuthnRequestRequestedAttributesAttributeReleasePolicy",
    "useFriendlyName" : false
  }
}

    The useFriendlyName allows the filter to compare the requested attribute’s friendly name with the resolved attribute.

  • This attribute release policy authorizes the release of allowed attributes if the requester ID of the SAML2 authentication request inside its Scoping element matches the defined pattern:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.support.saml.services.AuthnRequestRequesterIdAttributeReleasePolicy",
    "allowedAttributes" : [ "java.util.ArrayList", [ "cn", "mail", "sn" ] ]
    "requesterIdPattern" : ".*"
  }
}

  • A specific attribute release policy is available to release the attribute bundles to service providers that contain the entity attribute value https://refeds.org/category/anonymous:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ChainingAttributeReleasePolicy",
    "policies": [ "java.util.ArrayList",
      [
         {"@class": "org.apereo.cas.support.saml.services.AnonymousAccessAttributeReleasePolicy"}
      ]
    ]
  }
}

  • A specific attribute release policy is available to release the attribute bundles to service providers that contain the entity attribute value https://refeds.org/category/pseudonymous:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ChainingAttributeReleasePolicy",
    "policies": [ "java.util.ArrayList",
      [
         {"@class": "org.apereo.cas.support.saml.services.PseudonymousAccessAttributeReleasePolicy"}
      ]
    ]
  }
}

  • A specific attribute release policy is available to release the attribute bundles to service providers that contain the entity attribute value https://refeds.org/category/personalized:

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ChainingAttributeReleasePolicy",
    "policies": [ "java.util.ArrayList",
      [
         {"@class": "org.apereo.cas.support.saml.services.PersonalizedAccessAttributeReleasePolicy"}
      ]
    ]
  }
}

  • A specific attribute release policy that will compare the defined group as a regular expression with the name of the EntitiesDescriptor element as well as any AffiliationDescriptor owners or identifiers.

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    {
  "@class": "org.apereo.cas.support.saml.services.SamlRegisteredService",
  "serviceId": "entity-ids-allowed-via-regex",
  "name": "SAML",
  "id": 10,
  "metadataLocation": "path/to/incommon/metadata.xml",
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ChainingAttributeReleasePolicy",
    "policies": [ "java.util.ArrayList",
      [
         {"@class": "org.apereo.cas.support.saml.services.MetadataEntityGroupAttributeReleasePolicy"}
      ]
    ]
  }
}