CAS server

Presentation

LL::NG can be used as a CAS server. It can allow one to federate LL::NG with:

LL::NG is compatible with the CAS protocol versions 1.0, 2.0 and part of 3.0 (attributes exchange).

Configuration

In the Manager, go in General Parameters » Issuer modules » CAS and configure:

  • Activation: set to On.
  • Path: keep ^/cas/ unless you have change Apache portal configuration file.
  • Use rule: a rule to allow user to use this module, set to 1 to always allow.
For example, to allow only users with a strong authentication level:
$authenticationLevel > 2

Then go in Options to define:

  • CAS login: the session key used to fill user login (value will be transmitted to CAS clients).
  • CAS attributes: list of attributes that will be transmitted in validate response. Keys are the name of attribute in the CAS response, values are the name of session key.
  • Access control policy: define if access control should be done on CAS service. Three options:
    • none: no access control, the server will answer without checking if the user is authorized for the service (this is the default)
    • error: if user has no access, an error is shown on the portal, the user is not redirected to CAS service
    • faketicket: if the user has no access, a fake ticket is built, and the user is redirected to CAS service. Then CAS service has to show a correct error when service ticket validation will fail.
  • CAS session module name and options: choose a specific module if you do not want to mix CAS sessions and normal sessions (see why).
If CAS login is not set, it uses General Parameters » Logs » REMOTE_USER data, which is set to uid by default