If anyone’s interested in MediaWiki authentication against ExpressionEngine, here’s a working authentication extension I’ve made for MediaWiki.
https://gist.github.com/michaelp85/4719735
MediaWiki Extension Page http://www.mediawiki.org/wiki/Extension:ExtExpressionEngineAuthDB
It performs basic functions: login, logout and auto account creation in MediaWiki for first time logins and can be expanded upon to allow password resets from within MediaWiki, etc.
Let me know if you have questions.
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