References
https://spaces.internet2.edu/display/InCFederation/Metadata+Query+Protocol
https://spaces.internet2.edu/display/perentity/MDQ+Client+Software
https://spaces.internet2.edu/display/InCCollaborate/Metadata+Query+Server
Procedure
Obtain the InCommon Metadata Query Protocol signing certificate.
curl -OL https://ds.incommon.org/certs/mdq-beta-cert.pem
- Verify the certificate's signing key fingerprint with information on this page
https://ops.incommon.org/mdq_beta_cert.html
/usr/bin/openssl x509 -sha256 -noout -fingerprint -in mdq-beta-cert.pem