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Package harbourmaster
Short Description Integrates Harbourmaster providing a single sign-on solution for Drupal.
License GPL-2.0+
Informations about the package harbourmaster
Harbourmaster ("HMS") SSO plugin for Drupal 8
What does it do?
This plugin mainly contains an authentication provider that uses an HMS SSO cookie (containing a session token) to authenticate a user against the HMS SSO API.
It also provides configuration pages, a login page and blocks for all HMS User-Manager functions.
How does the authentication work?
Basically, the authentication provider will look for a valid SSO cookie on the current request. If it finds this token, it will be checked against the HMS SSO API endpoint. On a successful check, the endpoint returns session data for this user (this session data may then be cached for a certain amount of time, defaulting to 60s).
The HMS session data is then used to identify an existing Drupal user via its associated HMS user key. If none can be found, a new Drupal user will be created (using a random pasword), associating the HMS user key in the process. Already existing users may be updated with properties from the HMS session data.
At this point, Drupal's current_user will be set to the looked up user and a Drupal session will be created for this user. The SSO token is saved in that session. (Authentication would work without a session, but the Drupal CSRF protection on forms does not as it requires a session to save the CSRF token.)
The user is now logged in. On subsequent requests, the authentication provider will compare the current SSO token cookie with the SSO token saved in the Drupal session. Should the SSO token not match, have expired or the token cookie be missing, the Drupal session will be terminated and the user will be logged out.
If no token cookie is set on the request AND the current session (if existing) has no token associated, authentication will be handed to the standard Drupal "Cookie" authentication provider.
How does the User-Manager work?
The user manager provides widgets for all HMS SSO related functions like
- login
- registration
- password reset
It is included into Drupal by rendering a container with a specific id and including some Javascript from the User-Manager server.
When you login via the User-Manager, it will set the cookie containing the SSO token on its configured domain, usually ".domain.tld". This cookie will then always be sent to any subdomain of "domain.tld" and allow the authentication provider to work.
Logging out of the user manager destroys that cookie and subsequently the Drupal session.
Prerequisites:
- installed and properly configured HMS User-Manager on the same domain as the Drupal installation or any-level subdomain thereof
- installed and properly configured HMS SSO server (the actual "Harbourmaster")
Installation:
- enable the module
- configure at least the HMS SSO API und HMS User-Manager server urls on the configuration page
- rebuild the container (see known bugs)
- go to /harbourmaster/login or configure the "HMS Status" block which will provide links for login and logout
Available routes:
- /harbourmaster/login: renders most of the HMS User-Manager widgets
- /harbourmaster/logout: redirects to the logout user manager url which in turn redirects back to the Drupal front page
Available blocks:
- Status: Debugging block that shows the current authentication provider and matching login/logout links
- One block for each of the user manager widgets
Other:
- includes a caching policy that denies caching when a valid (by pattern) token is set on the request
- includes an event subscriber that can be triggered to delete the SSO cookie on the response (this will happen when the SSO session associated with that token was deemed invalid) - subsequent requests can then be cached
Known Bugs and ToDos:
- conflict resolution for unique username is very basic
- Drupal user functions (password reset, profile edit, user canceling) still need to be blocked for HMS SSO authenticated users.
- user image update is currently very simple