RoundCube OpenID Connect Single Sign-On (SSO) Plugin By Gluu#
Gluu's OpenID Connect Single Sign-On (SSO) Roundcube plugin will enable you to authenticate users against any standard OpenID Connect Provider (OP). If you don't already have an OP you can deploy the free open source Gluu Server.
In order to use the RoundCube plugin you will need to have a standard OP (like Google or a Gluu Server) and the oxd server.
Compatibility : 0.6.0 <= 10.21 versions
To install the RoundCube OpenID Connect Single Sign On (SSO) Plugin By Gluu via Composer, execute the following command
$ composer install `composer require "gluufederation/roundcube_oxd_plugin": "3.1.4"`
In your RoundCube admin menu panel, you should see the OpenID Connect menu tab. Click the link to navigate to the General configuration page:
- Automatically log in any user with an account in the OpenID Provider: By setting login to automatic, any user with an account in the OP will be able to dynamically log in for an account in your Roundcube site
- Only register and allow ongoing access to users with one or more of the following roles in the OP: Using this option you can limit login to users who have a specified role in the OP, for instance
roundcube. This is not configurable in all OPs, but is supported in the Gluu Server. Follow the instructions below to limit access based on an OP role
- URI of the OpenID Provider: insert the URI of the OpenID Connect Provider
- Custom URI after logout: custom URI after logout (for example, a "Thank you" page)
- oxd port: enter the oxd-server port (you can find this in the
If your OpenID Provider supports dynamic registration, no additional steps are required in the general tab and you can navigate to the OpenID Connect Configuration tab.
If your OpenID Connect Provider doesn't support dynamic registration, you will need to insert your OpenID Provider
client_secret on the following page.
To generate your
client_secret use the redirect URI:
If you are using a Gluu server as your OpenID Provider, you can make sure everything is configured properly by logging into to your Gluu Server, navigate to the OpenID Connect > Clients page. Search for your
Enrollment and Access Management#
Navigate to your Gluu Server admin GUI. Click the
Users tab in the left hand navigation menu. Select
Manage People. Find the user(s) who should have access. Click their user entry. Add the
User Permission attribute to the person and specify the same value as in the plugin. For instance, if in the plugin you have limited enrollment to user(s) with role =
roundcube, then you should also have
User Permission =
roundcube in the user entry. Update the user record, and now they are ready for enrollment at your Roundcube site.
OpenID Connect Configuration#
Scopes are groups of user attributes that are sent from the OP to the application during login and enrollment. By default, the requested scopes are
To view your OP's available scopes, in a web browser navigate to
If you are using a Gluu Server as your OpenID Provider, you can view all available scopes by navigating to the Scopes interface in Gluu CE Server Admin UI
OpenID Connect >
In the plugin interface, you can enable, disable and delete scopes.
If you have chosen to limit enrollment to users with specific roles in the OP, you will also need to request the
Permission scope, as shown in the above screenshot.
For logging into your RoundCube site, it is very important that your OP supports
imapData scope, which contains your imap connection climes (
This is not configurable in all OP's. It is configurable if you are using a Gluu Server.
For example :
Bypass the local RoundCube login page and send users straight to the OP for authentication#
Check this box so that when users attempt to log in, they are sent straight to the OP, bypassing the local RoundCube login screen. When it is not checked, it will give proof the following screen.
To signal which type of authentication should be used, an OpenID Connect client may request a specific authentication context class reference value (a.k.a. "acr"). The authentication options available will depend on which types of mechanisms the OP has been configured to support. The Gluu Server supports the following authentication mechanisms out-of-the-box: username/password (basic), Duo Security, Super Gluu, and U2F tokens, like Yubikey.
Navigate to your OpenID Provider configuration webpage
https://OpenID-Provider/.well-known/openid-configuration to see supported
acr_values. In the
Select acr section of the plugin page, choose the mechanism which you want for authentication.
Select acr value is
none, users will be sent to pass the OP's default authentication mechanism.