A test deployment of the GridShib-CA which will issue credentials to any user who has an identity from any OpenIdp or ProtectNetwork. You can try out this deployment at https://computer.ncsa.uiuc.edu
Please note that the test GridShib-CA is not a well known CA, so you will need to install the GridShib-CA certificate to actually use generated credentials. You can find the GridShib-CA certificate (along with the signing policy file) here: gridshib-ca-cert.tar.
Please note the GridShib-CA is not production, use of it's credentials for production purposes is not recommended and is at your own risk.