OAuth 2 services
- Moodle 3.3 adds support for OAuth 2 services, which can be used by any plugin to provide authenticated access to external services either as the current user, or using a system account.
- OAuth 2 services are used for example, to provide a "Log in using Google/Microsoft/Facebook" feature on the login page, and then to share that authenticated session with repositories like Google Drive and OneDrive without having to re-authenticate.
- OAuth 2 services can be used by plugins even if they do not use them on the login page, and it's possible to login to multiple services at the same time.
See OAuth 2 authentication for details of how to enable the feature.
Open ID Connect
Open ID Connect is a standard for OAuth 2 login services that makes it easier to setup a working login system. If the service you are setting up is Open ID Connect compliant, you will only have to enter the base url for the service, and Moodle will discover all the other information required by requesting the "discovery document" which is expected to exist at <issuer base url>/.well-known/openid-configuration.
First some terminology: In these scenarios, Moodle is the "client" and the remote service (Google, Facebook, ...) is the "issuer" or "provider".
How do I get a client ID and secret?
The client ID and secret are provided by the issuer, so you need to set it up outside of Moodle, at the issuer. Instructions for prominent OAuth 2 providers are linked here.
- OAuth 2 Google service
- OAuth 2 Microsoft service
- OAuth 2 Facebook service
- OAuth 2 LinkedIn service
- OAuth 2 Twitter service
Adding an issuer
If possible, use one of the preconfigured services if yours is among it. You can still configure individual details later on. You can choose from this list:
Then, the following settings appear:
As a general rule, don't change any settings, except for Name, Client ID, Client Secret, and Service Base URL, unless installation instructions advise you to. Apart from that the defaults are usually fine, especially if you use one of the preconfigured services. See Advanced issuer settings (below) for explanations of some of the settings.
After an issuer has been created, further configuration options are shown to the right of the service. Usually no change is required for preconfigured services.
- Go to the settings screen again.
- Configure endpoints
- Define the issuer's endpoints, i.e. the URLs that Moodle will connect to.
- Configure user field mappings
- If you use the issuer as an identity provider, you can configure how the provider's response (from the userinfo_endpoint) should be mapped to Moodle user fields.
- Delete the issuer configuration.
- Mark the issuer as disabled; plugins may not use them.
- Move up / down
- Change the order of appearance in the issuer table.
Connecting a system account
- A system account may be connected. It may be needed by plugins in order to provide advanced functionality, such as access controlled links from the Google Drive repository or OneDrive repository.
- The system account should be a dedicated account for this purpose only. The system account doesn't require an email address to be associated with it (Moodle 3.3.2 onwards).
- A system account is not needed for login functionality.
Advanced issuer settings
- Authenticate token requests via HTTP headers
- This should be the norm according to the OAuth 2 standard. However, most providers don't support this and require authentication details in the body instead. For most configurations, leave this checkbox disabled, unless instructions advise you to check it.