OpenID Connect

This is a summary of using OpenID Connect for authentication. Two example OpenID Connect identity providers we have documented include Dex and Keycloak.

The following prerequisites need to be satisfied:

• A OIDC IdP server deployed, e.g., idp.example.com (outside of scope of this document)

• The mod_auth_openidc installed on the OnDemand Server.

Note

OnDemand repos provide the httpd24-mod_auth_openidc RPM for RHEL 7 and CentOS 7 as it must be built against SCL Apache. The OnDemand repos also have the mod_auth_openidc RPM for RHEL 8 and Rocky 8 that are newer than what the OS provides to make use of some newer features.

The following is an example ood-portal-generator configuration file:

# /etc/ood/config/ood_portal.yml
---
servername: ondemand.example.com

# Use OIDC authentication
auth:
  - "AuthType openid-connect"
  - "Require valid-user"

# Use OIDC logout
logout_redirect: "/oidc?logout=https%3A%2F%2Fondemand.example.com"

# Capture system user name from authenticated user name
user_map_cmd: "/opt/ood/ood_auth_map/bin/ood_auth_map.regex"

oidc_uri: "/oidc"
oidc_provider_metadata_url: "https://idp.example.com/.well-known/openid-configuration"
oidc_client_id: "ondemand.example.com"
oidc_client_secret: "b972c25d-88a4-41fa-87f7-a12ff167dd13"
oidc_remote_user_claim: "preferred_username"
oidc_scope: "openid profile email groups"
oidc_session_inactivity_timeout: 28800
oidc_session_max_duration: 28800
oidc_state_max_number_of_cookies: "10 true"
oidc_settings:
  OIDCPassIDTokenAs: "serialized"
  OIDCPassRefreshToken: "On"
  OIDCPassClaimsAs: "environment"
  OIDCStripCookies: "mod_auth_openidc_session mod_auth_openidc_session_chunks mod_auth_openidc_session_0 mod_auth_openidc_session_1"
  OIDCResponseType: "code"

Note

It’s recommended to secure /etc/ood/config/ood_portal.yml by changing the file permissions to be 0600 and make the file only readable by root:

sudo chmod root:root /etc/ood/config/ood_portal.yml
sudo chmod 0600 /etc/ood/config/ood_portal.yml

Build the Apache configuration file and install it.