Extension:SimpleSAMLphp

The SimpleSAMLphp extension extends the PluggableAuth extension to provide authentication using SimpleSAMLphp.

Configuration
Values must be provided for the following mandatory configuration variables:

In addition, the following optional configuration variables are provided:

Group Mapping
Use case: your SAML IdP reads groups from LDAP or Database and stores this information inside an attribute of the SAML response. You want to use this to map MediaWiki groups to users belonging to some known groups given by your IdP.

Example: You can come up with rather complex mappings that fit your needs. If you have more than one attribute from SAML, just add it to the array with the array of values you like to map.
 * Your IdP sends an attribute named "groups" with a list of names like "administrator", "student", "teacher", ... in the SAML response after authentication.
 * All users that have the value "administrator" in the "groups" attribute shall be mapped to the MediaWiki "sysop" group to give them admin rights within your MediaWiki instance.
 * Create a group map in your LocalSettings.php as follows:

If a MediaWiki group does not exist, it will be created "on the fly" on first successful mapping of a user.

HINT: If a user belongs to a MediaWiki group that is no longer mapped to that user (for example, by losing the group membership in the SAML user data source), the user will be removed from that MediaWiki group at next log in. In that way you can mass remove groups from SAML and their memberships, too - just scramble the mapping values so they don't match the SAML response, but don't mess up the MediaWiki group name.

Group Mapping #2
Since version 4.3 one can also configure an alternative group synchronization mechanism. Besides the default "MapGroups" one can use "SyncAllGroups", which takes all groups from the SAML response and assign the user to them.

If the IdP returns group names that are not suitable for the wiki, one can set up a callback to modify the group names. Some IdP-Setups may return LDAP-DNs

Release Notes

 * Version 4.3
 * Added support for attribute processors
 * Fixed bug in SAML attribute processing
 * Added PSR-4 compatible namespace


 * Version 4.2
 * Broke out username, real name, and email functions so they could be overridden in a subclass to allow custom rules
 * Coding style and directories
 * Improved debugging


 * Version 4.1
 * Implements Extension:PluggableAuth/PluggableAuthPopulateGroups hook to populate MediaWiki groups from SAML attributes. Thank you to Poikilotherm for contributing this functionality.


 * Version 4.0
 * Added optional error message to authenticate
 * Bumped version number to synchronize with PluggableAuth and OpenID Connect extensions

Known Bugs
If you are using MediaWiki 1.27 or later with PluggableAuth 2.0 or later, problems have been observed when SimpleSAMLphp is configured to use phpession for store.type. This may be due to T147161. To fix this, try to use  and/or use a different SimpleSAMLphp (the software not this extension is meant) store type by adjusting simplesamlphp/config/config.php 'store.type' => 'sql' and 'store.sql.dsn' => 'sqlite:/sum/path/where/the/apache/user/can/write/sqlitedatabase.sq3'