# documentation:2.0:authopenid
Keywords: documentation,2.0,authopenid

# OpenID

Authentication | Users | Password
--- | --- | ---
✔ | ✔ |

OpenID protocol is deprecated. You should now use OpenID Connect.

## Presentation

LL::NG can delegate authentication to an OpenID server. This requires Perl OpenID consumer module with at least version 1.0.

LL::NG can also act as OpenID server, that allows one to interconnect two LL::NG systems.

LL::NG will then display a form with an OpenID input, wher users will type their OpenID login.

OpenID authentication can proposed as an alternate authentication scheme using the authentication choice method.

LL::NG can use a white list or a black list to filter allowed OpenID domains.

If OpenID is used as users database, attributes will be requested to the server with SREG extension.

## Configuration

In Manager, go in `General Parameters` > `Authentication modules` and choose OpenID for authentication and/or users.

Then, go in `OpenID parameters`:

- Authentication level: authentication level for this module.
- Secret token: used to check integrity of OpenID response.
- Authorizated domain:
  - List type: choose white list to define allowed domains or black list to define forbidden domains
  - List: domains list (comma separated values)

To configure requested attributes, edit Exported variables and define attributes:

- Key: internal session key, can be prefixed by `!` to make the attribute required
- Value: SREG attribute name:
  - fullname
  - nickname
  - language
  - postcode
  - timezone
  - country
  - gender
  - email
  - dob

See also exported variables configuration.