Extension:CASAuthentication

This version of the CAS Authentication plug-in is an attempt to implement CAS Authentication in MediaWiki 1.13+ without having to edit any of the core application files, but by using Hooks. It is based on a previous version by Christophe Naslain.

Feel free to suggest improvements.

What can this extension do?
This extension implements Central Authentication Service (CAS) authentication in place of MediaWiki's standard authentication.

Requirements
You need the phpCAS php classes in order to use this extension (note: phpCAS need curl, openssl, zlib and dom php extensions compiled).

Installation
In your extensions directory, create a folder called CASAuth. In the new directory, create a file called CASAuth.php from the code included below.

You then need to extract phpCAS inside the new CASAuth directory. Rename the phpCAS directory to "CAS" (from something like "CAS-1.2.2"), or edit the configuration variable to point to the directory.

Then add the following to LocalSettings.php:

Configuration parameters
There is a single array with configuration variables:


 * phpCAS - Path to phpCAS directory.
 * Server - Address to CAS server.
 * Port - Port to CAS server. Default: 443.
 * Url - Subdir to CAS authentication.
 * Version - CAS version, should be either 1.0 or 2.0.
 * CreateAccounts - Should CASAuth create accounts on the wiki? Should be true unless all accounts already exists on the wiki!
 * PwdSecret - A random string that is used when generating the MediaWiki password for this user. YOU SHOULD EDIT THIS TO A VERY RANDOM STRING! YOU SHOULD ALSO KEEP THIS A SECRET!
 * EmailDomain - The default domain for new users email address (is appended to the username).
 * RememberMe - Log in users with the 'Remember me' option.

About CreateAccounts
If the user you are logging in as does not exist on the wiki, and this extension is not configured to automatically create accounts, then you will show up as an anonymous user. Just because you are logging in via a CAS server, that does not mean you do not need an account on the wiki. This extension only makes logging in a lot easier (and the user will be oblivious to the fact that an account has been created on the wiki).

Logging in without CAS
Even though you've installed this extension, you might have a need to log in to "non-CAS" users. They might be users you made before installing CAS. The easy way to do this is to first login with a CAS user, then go to Special:UserLogin and you will see the normal login box. You can now use it to login to your non-CAS user.

LDAP connection
This improvement works only in combination with Extension:External_Data. It sets the RealName and Email to more useful data from LDAP.

Improve
Example is for openLDAP, maybe it should be improved with settings from LocalSettings.php with Hook for realname and emailaddress
 * uid
 * "domain" to fetch settings for EDUtils::getLDAPData from LocalSettings.php see LDAP config
 * array("sn","givenname","mail")) array to search in LDAP
 * extend: disableChangeRealname, disableChangeEmail
 * update data on login