Western University

Western Single Sign-On (Apereo CAS — CAS 3.0, SAML2, OIDC)

Western Technology Services operates an Apereo CAS server at ssocas.uwo.ca. The CAS 3.0 protocol is publicly reachable — /cas/p3/serviceValidate returns a well-formed cas:serviceResponse to an anonymous request — and the server also emits a SAML 2.0 IdP descriptor at /cas/idp/metadata (HTTP 200, IDPSSODescriptor, shibmd:Scope uwo.ca, signing certificate CN=ssocas.uwo.ca valid to 2045), and exposes a Spring Boot actuator link document at /cas/actuator. OIDC is advertised in the WTS service catalogue but its discovery document and JWKS both return 403, so no OIDC surface is publicly usable. Integration is request-based through WTS and gated behind institutional affiliation rather than open self-service registration.

GitHub

Documentation

📖
Documentation
https://wts.uwo.ca/services/o/single-sign-on-sso-saml2-oauth-oidc-cas/index.html
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/western/refs/heads/main/authentication/western-authentication.yml

Other Resources

🔗
Conformance
https://raw.githubusercontent.com/api-evangelist/western/refs/heads/main/conformance/western-conformance.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: western:sso-cas
name: Western Single Sign-On (Apereo CAS — CAS 3.0, SAML2, OIDC)
description: Western Technology Services operates an Apereo CAS server at ssocas.uwo.ca. The CAS 3.0 protocol
  is publicly reachable — /cas/p3/serviceValidate returns a well-formed cas:serviceResponse to an anonymous
  request — and the server also emits a SAML 2.0 IdP descriptor at /cas/idp/metadata (HTTP 200, IDPSSODescriptor,
  shibmd:Scope uwo.ca, signing certificate CN=ssocas.uwo.ca valid to 2045), and exposes a Spring Boot
  actuator link document at /cas/actuator. OIDC is advertised in the WTS service catalogue but its discovery
  document and JWKS both return 403, so no OIDC surface is publicly usable. Integration is request-based
  through WTS and gated behind institutional affiliation rather than open self-service registration.
humanURL: https://wts.uwo.ca/services/o/single-sign-on-sso-saml2-oauth-oidc-cas/index.html
baseURL: https://ssocas.uwo.ca/cas
tags:
- Identity
- Authentication
- SSO
- SAML
- CAS
- OpenID Connect
x-operator: institution
x-operator-evidence: Host ssocas.uwo.ca is under Western's own registrable domain and the TLS and SAML
  signing certificates are both issued to CN=ssocas.uwo.ca.
x-developer-usable: false
x-developer-note: Documented but affiliation-gated. No self-serve client registration, no published scopes,
  no token endpoint reachable anonymously.
x-caveat: The SAML descriptor served here carries the stock Apereo CAS placeholder entityID https://cas.example.org/idp.
  It is live and correctly scoped to uwo.ca, but the entityID was never configured and this is not the
  entity registered in the federation.
properties:
- type: Documentation
  url: https://wts.uwo.ca/services/o/single-sign-on-sso-saml2-oauth-oidc-cas/index.html
- type: Authentication
  url: authentication/western-authentication.yml
- type: Conformance
  url: conformance/western-conformance.yml