Direct SSO Entrypoint

Moodle admin tool which provides an entrypoint that can be used as persistent URL where external websites can redirect users directly to the Moodle SSO mechanisms without ever showing the login page to the user and especially without the need that the user clicks on a SSO button on the login page.
Moodle core allows admins to configure auth backends which
provide SSO functionalities to the Moodle users. One of the most
important auth backends with this SSO functionality is OAuth2.
If you add OAuth2 to your Moodle instance, an additional
login button will appear on the login page which allows users to login
via OAuth instead of logging in with the Moodle login form. By design,
the URL of this OAuth button on the login form contains the Moodle
sesskey which is bount to an active Moodle session.
Because of this design choice, admins who want to link
from external websites (like corporation portals) to Moodle and want the
users to be directly logged in via SSO, do not have a possibility to
realize this goals with Moodle core tools.
This tool solves this problem by providing such a persistent SSO URL
within Moodle. Additionally, as the SSO login into Moodle will happen
really transparently for the user, the tool makes sure that the users
can’t be maliciously redirected to any Moodle page / URL after the SSO
login so that CSRF attacks are avoided.
Please see README file for details about the usage and features of this plugin.
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