SLO Logout Propagation error - Resolver returned no EncryptionParameters

[Lipscomb, Gary]

IdP 4.1.5
RHEL 8
jdk_version: 11.0.14

Hi list,

Getting the error shown below[1] when propagating the logout.
The vendor in question doesn’t have an encryption key in their metadata so I have added encryptionOptional into the metadata [2]
Login works OK, though they don’t send a SAML logout request during their logout process.
Is there another setting I have missed for logout propagation to disable encryption or is this mandatory.

Regards

Gary

[1] Log
2022-02-07 09:26:10,386 - 10.9.246.71 - WARN [org.opensaml.xmlsec.impl.BasicEncryptionParametersResolver:243] - Validation failure: Failed to resolve an encryption key
2022-02-07 09:26:10,386 - 10.9.246.71 - WARN [net.shibboleth.idp.saml.saml2.profile.impl.PopulateEncryptionParameters:335] - Profile Action PopulateEncryptionParameters: Resolver returned no EncryptionParameters
2022-02-07 09:26:10,387 - 10.9.246.71 - INFO [Shibboleth-Audit.LogoutPropagation:283] - 10.9.246.71|2022-02-06T22:26:10.383798Z|2022-02-06T22:26:10.386983Z||https://www.mentimeter.com/auth/saml/metadata||||||||||||||||Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) Gecko/20100101 Firefox/96.0

[2] metadata

  <md:Extensions>
    <mdattr:EntityAttributes>
        <!-- Replaces overrides in RelyingParty.xml -->
        <saml:Attribute Name=http://shibboleth.net/ns/profiles/saml2/sso/browser/encryptionOptional NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
            <saml:AttributeValue xsi:type="xsd:boolean">true</saml:AttributeValue>
        </saml:Attribute>
        <saml:Attribute Name=http://shibboleth.net/ns/profiles/saml2/logout/encryptionOptional NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
            <saml:AttributeValue xsi:type="xsd:boolean">true</saml:AttributeValue>
        </saml:Attribute>
    </mdattr:EntityAttributes>
  </md:Extensions>


Gary Lipscomb
Technical Officer, Systems | IT Infrastructure & Security | Division of Information Technology
Charles Sturt University



|   ALBURY-WODONGA   |   BATHURST   |   BRISBANE   |   CANBERRA   |   DUBBO   |   GOULBURN   |   MELBOURNE   |   ORANGE   |   PORT MACQUARIE   |   SYDNEY   |   WAGGA WAGGA   |

LEGAL NOTICE
This email (and any attachment) is confidential and is intended for the use of the addressee(s) only. If you are not the intended recipient of this email, you must not copy, distribute, take any action in reliance on it or disclose it to anyone. Any confidentiality is not waived or lost by reason of mistaken delivery. Email should be checked for viruses and defects before opening. Charles Sturt University does not accept liability for viruses or any consequence which arise as a result of this email transmission. Email communications with Charles Sturt University may be subject to automated email filtering, which could result in the delay or deletion of a legitimate email before it is read at Charles Sturt University. The views expressed in this email are not necessarily those of Charles Sturt University.
Charles Sturt University in Australia The Grange Chancellery, Panorama Avenue, Bathurst NSW Australia 2795 (ABN: 83 878 708 551; CRICOS Provider Number: 00005F (National)). TEQSA Provider Number: PV12018
Consider the environment before printing this email.