SAML IdP module for Drupal
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README.md

SAML IdP Provider module

Provides integration between Drupal 8 and SimpleSAMLphp to provide an Identity Provider (IdP) for SAML service providers (SPs).

Installation

A few additional steps are required to get this module working. This is an API module and as such does not, out of the box, provide any working functionality.

  1. It is recommended to install with composer, to manage dependencies including simplesamlphp itself. See immediately below. Try docker-drupal
  2. Run the post-Install script, Drupal\saml_idp\Install::postInstall, by adding it to your project's composer.json file under post-install-cmd. If you don't do so, you will need to manually enable the "drupalauth" module in simplesamlphp by creating an empty text file at vendor/simplesamlphp/simplesamlphp/modules/drupalauth/default-enable. Do not be mislead by the "drupalauth" project on Drupal.org, which is for Drupal 7. SSP only needs to be aware of the presence of the SSP auth module, which is autoloaded from the Drupal module.
  3. Configure simplesamlphp's authsources.php to use drupalauth:External as an authentication service. A sample is contained in the config-dist directory.
  4. Configure a cookie_domain value in your services.yml file (and any local versions you use for development.) Absent this value, Drupal will use a combination of hostname and base path to create cookie names, which is not helpful when Drupal is being run inside another application. Drupal provides a commented-out default with good documentation.
  5. SimpleSAMLphp itself requires extensive configuration, including private key generation and the specification of service providers. See the IdP QuickStart documentation for more information.

Developer notes

  • The autoloader configuration in composer.json is required because, while simplesamlphp may be running in the same global project as Drupal, the latter is not bootstrapped from the start. Drupal adds PSR-4 paths by its pattern. Additionally, the classes provided for the SSP module are not namespaced and as such need special treatment.
  • If you are in a multisite environment (why? why?!), you may need to adjust your sites configuration to allow Drupal to find the correct site configuration to use. If you do not have a sites/sites.php file (as is typical) Drupal will assume you are using the site defined at sites/default.

Copyright and License

© 2015-2018 by Brad Jones LLC. Licensed under GPL 2.

Adapted from the drupalauth module developed by Steve Moitozo. Little if any of the original code remains due to the transition to composer and Drupal 8, but many thanks for the outline!