certificatelogin 5.x-2.0

The module makes it possible for your users to register and login by certificate. Do you work for an organization where certificates are used for authentication? When a drupal page is accessed via https the module checks for certain environmental variables that contain the user's unique information, such as an email address. It then creates a new account if one does not exist or logs the user in if the account exists already.

Features:
Present login link on access denied (403)
Automatic account creation
Automatic role configuration
Current login override

This module makes no major changes to your database.