AuthPlugin/ja

認証プラグイン インターフェイスです.

既存の認証プラグイン
There are existing authentication plugins for many cases like IMAP, LDAP and more. Category:User identity extensions lists these extensions.

新しい認証プラグインの作成
If you need to write your own plugin, see the source doc at MediaWiki Source Documentation (see also the latest source code)

Instantiate a subclass of AuthPlugin and set $wgAuth to it to authenticate against some external source.

The default behavior is not to do anything, and use the local user database for all authentication. A subclass can require that all accounts authenticate externally, or use it only as a fallback; also you can transparently create internal wiki accounts the first time someone logs in who can be authenticated externally.

フォールバック
As mentioned above, a subclass can fall back to local (i.e. mediawiki db) authentication. It does this by returning false when its strict method is being called. The $wgUser object then proceeds to compare the submitted password to the one in its database.

See this excerpt of includes/User.php for details, method checkPassword: if( $wgAuth->authenticate( $this->getName, $password ) ) { return true; } elseif( $wgAuth->strict ) { /* 認証プラグインはローカル認証を許可しない */ return false; } elseif( $wgAuth->strictUserAuth( $this->getName ) ) { /* 認証プラグインは、この利用者名に対してローカル認証を許可しない */ return false; } if ( self::comparePasswords( $this->mPassword, $password, $this->mId ) ) { return true;

As you can see, it is even possible for the AuthPlugin to allow only certain users to fall back to their passwords stored locally by returning false when its strictUserAuth is being called next.

注記

 * The username is translated by MediaWiki before it is passed to the function: First letter becomes upper case, underscore '_' become spaces ' '.
 * If autoCreate returns true (MediaWiki should create a local account for the user) updateExternalDB( $user ) is called anyway. I guess this is to allow the plugin to synchronize the user settings with the external database. updateExternalDB must return true to make MediaWiki store the settings in the local account.
 * AuthPlugin->userExists(...) is not called when the user has already been stored in the wiki DataBase.

インストール
Put the files in the extensions folder (preferably a sub folder), than add something akin to the below to your LocalSettings.php

外部セッション
In order to check the login status against some external session management scheme, use the AutoAuthenticate hook (MediaWiki 1.5 - 1.12) or UserLoadFromSession (since MediaWiki 1.13). This can be used to implement a single-signon setup, in addition to simple account sharing.

関連項目

 * Extension:CentralAuth