Central Authentication Service (CAS) is a ticket-based authentication protocol that lets a user sign on to multiple applications while providing their credentials only once to a centralized CAS server (often called a "CAS identify provider"). Enabling CAS authentication lets LabKey Server authenticate users using a CAS identity provider, without users providing their credentials directly to LabKey Server. Learn more in the CAS Protocol Documentation
You can also configure LabKey Server itself as a CAS Identity Provider, to which other servers can delegate authentication. For details see Configure CAS Identity Provider
Note that basic HTTP authentication
and netrc authentication using usernames
are not compatible with SSO authentication such as CAS. API keys
can be used as an alternative for authenticating during LabKey API use.
Add/Edit a CAS Single Sign On Configuration
- Select (Admin) > Site > Admin Console.
- Under Configuration, click Authentication.
- In the Configurations section, Primary tab, select Add New Primary Configuration > CAS....
- In the popup, enter the following:
- Configuration Status: By default, new configurations are Enabled. Click the slider to change it to Disabled.
- Description: Enter a unique descriptive label for this configuration. Be sure the description clearly differentiates this configuration from other authentication configurations, especially if you configure multiple CAS configurations. This description will appear in the settings UI and in the audit log every time a user logs in using this configuration.
- CAS Server URL: Enter a CAS server URL. The URL should start with "https://" and end with "/cas"
- Default to this CAS Identity Provider: Check the box to make this CAS configuration the default login method.
- Invoke CAS /logout API on User Logout: Check the box if you want a user logging out of this server to also invoke the /logout action on the CAS identity provider. Otherwise, logout on a server using CAS does not log the user out of the CAS identity provider itself.
- Page Header Logo & Login Page Logo: Logo branding for the login UI. See examples below.
- Click Finish.
You will see your new configuration listed under Single Sign On Configurations
. If there are multiple configurations, they will be listed in the interface in the order listed here. You can use the six-block handle on the left to drag and drop them to reorder.
Auto Create Authenticated Users
If a user is authenticated by the CAS server but does not already have an account on the LabKey Server, the system can create one automatically. This is enabled by default but can be disabled using a checkbox in the global settings of the authentication page
Single Sign On Logo
Uploaded logos can be displayed on the header area, the login page, or both. This signals to users that single sign on is available. When the logo is clicked, LabKey Server will attempt to authenticate the user against the CAS server.
Edit/Disable/Delete CAS Configurations
On the list of Single Sign On Configurations
you will see the CAS configuration(s) you have defined, with an enabled/disabled indicator for each.
- Use the six-block handle to reorder single signon configurations.
- Use the to delete a configuration.
- To edit, click the (pencil) icon.
After making changes in the configuration popup, including switching the Configuration Status
slider to Disabled
, click Apply
to exit the popup and Save and Finish
to close the authentication page.