This page is a translated version of the page Extension:CentralAuth and the translation is 14% complete.
Manual de extensiones de MediaWiki
Estado de lanzamiento: estable
Implementación Identidad de usuario , Base de datos , Página especial , API
Descripción Permite unificar cuentas en cuentas globales
Autor(es) Brion Vibber
Política de compatibilidad Lanzamientos de screenshots junto con MediaWiki. Master no es compatible con versiones anteriores.
MediaWiki >= 1.42
Cambios de la base de datos
Tablas globalnames
Licencia GNU Licencia Pública general 2.0 o posterior
  • $wgCentralAuthAutoLoginWikis
  • $wgCentralAuthCookies
  • $wgCentralAuthCookiePath
  • $wgCentralAuthRC
  • $wgCentralAuthGlobalBlockInterwikiPrefix
  • $wgCentralAuthAutoMigrateNonGlobalAccounts
  • $wgCentralAuthTokenSessionTimeout
  • $wgCentralAuthDatabase
  • $wgCentralAuthDryRun
  • $wgCentralAuthAutoMigrate
  • $wgCentralAuthTokenCacheType
  • $wgCentralAuthSessionCacheType
  • $wgGlobalRenameDenylist
  • $wgCentralAuthOldNameAntiSpoofWiki
  • $wgCentralAuthLoginIcon
  • $wgCentralAuthStrict
  • $wgCentralAuthReadOnly
  • $wgCentralAuthLoginWiki
  • $wgCentralAuthEnableGlobalRenameRequest
  • $wgCentralAuthGlobalPasswordPolicies
  • $wgCentralAuthWikisPerSuppressJob
  • $wgCentralAuthCookieDomain
  • $wgCentralAuthPrefsForUIReload
  • $wgCentralAuthAutoCreateWikis
  • $wgCentralAuthCookiePrefix
Descargas trimestrales 64 (Ranked 101st)
Traduce la extensión CentralAuth si está disponible en translatewiki.net
Asuntos Tareas abiertas · Reportar un bug

CentralAuth allows merging several existing separate account systems into one global account system.

Advertencia Advertencia: CentralAuth fue diseñado específicamente para proyectos de Wikimedia que ya tenían millones de cuentas que necesitaban ser unificadas en una tabla global.

Si estás empezando una nueva granja wiki desde cero y no tienes necesidad de unificar cuentas existentes en una tabla global, es mucho más fácil establecer cuentas globales usando $wgSharedDB que usar CentralAuth.[1][2]

Aún así, $wgSharedDB es sólo útil para prevenir conflictos al crear nombres de usuario, y no maneja nada como inicio de sesión universal (en cambio, se requiere que los usuarios inicien sesión en cada wiki), o gestión y derechos de cuentas entre clústeres. Esta extensión proporciona dicha funcionalidad a costa de la complejidad.

If you end up using this extension on a third-party wiki, it is likely that you will end up having to troubleshoot complex issues that potentially require diving into the source code to resolve.

You have been warned.


Ve la sección de configuración abajo para los prerrequisitos para usar CentralAuth. Entonces sigue estas instrucciones cuando estés listo(a) para activar CentralAuth:

  1. Descargue la última instantánea y extráela a tu directorio extensions.
  2. Elige una base de datos y crea las tablas de datos de CentralAuth. Puedes usar una base de datos existente o crear una nueva; la extensión por defecto usa una base de datos llamada centralauth (ve $wgCentralAuthDatabase más abajo). Usa esta base de datos y luego ejecuta tables-generated.sql.
    • Si usas Extension:AntiSpoof necesitarás crear una tabla spoofuser global (para bloquear nombres de usuarios que son similares a nombres de usuario existentes en cualquier wiki). Una forma de hacerlo es volcar la tabla spoofuser de la base de datos del wiki local e importarla a la nueva $wgCentralAuthDatabase.
  3. Añade wfLoadExtension( 'CentralAuth' ); a LocalSettings.php por cada uno de tus wikis, o en otro archivo PHP que esté incluido en LocalSettings.php en cada uno de tus wikis.
  4. La extensión debería estar activa ahora.

Estos son ejemplos de comandos de shell y SQL para crear la base de datos centralauth, copia en ella la tabla spoofuser y migra a ella los datos de usuario existentes. Reemplaza $wgDBname y $wgDBuser con los valores de tu propia instalación wiki.

Crea la nueva base de datos (recuerda que este paso es opcional, puedes usar una de tus bases de datos existentes, en cuyo caso salte al paso de creación de tablas):

$ cd extensions/CentralAuth
$ mysql -u root -p
(enter password for root SQL user)
CREATE DATABASE centralauth;
USE centralauth;
GRANT all on centralauth.* to '$wgDBuser'@'localhost';

Lo siguiente asume que tu directorio de trabajo actual es tu instalación MediaWiki (no tu directorio CentralAuth). Crea las tablas central auth (se prefiere usar $3.

php maintenance/sql.php --wikidb centralauth extensions/CentralAuth/schema/<db_type>/tables-generated.sql

Si AntiSpoof está instalada, crea una tabla (alternativamente, puedes copiar una tabla AntiSpoof existente si quieres mantener entradas previas):

php maintenance/sql.php --wikidb centralauth extensions/AntiSpoof/sql/<db_type>/tables-generated.sql

Ejecuta los scripts de migración de usuarios

$ php extensions/CentralAuth/maintenance/migratePass0.php
$ php extensions/CentralAuth/maintenance/migratePass1.php


CentralAuth is designed for large wiki farms who run database updates manually in order to enable zero-downtime upgrades. For that reason, the CentralAuth database will not be updated with the usual upgrade process. Third-party users are expected to follow CentralAuth development and apply database migrations manually instead.


  Advertencia: A central login wiki is required if you want to have a universal sign-on across different primary domains (i.e. if your wikis are not under subdomains of the same domain). Véase abajo para detalles.

First, you'll need to configure your wiki family using $wgConf , or CentralAuth can't be used for your wiki family. This includes setting $wgLocalDatabases and assigning it to $wgConf->wikis, and $wgConf->settings (minimum is $wgCanonicalServer , $wgServer and $wgArticlePath ). Follow the examples carefully. If you are creating a new wiki family, bear in mind that it may be easier if the databases for the wikis in each group have the same suffix (e.g. hypothetical databases enwiki, dewiki, frwiki, etc., pertaining to wikis belonging to the same group, all have the suffix "wiki").

After installing the extension, you have to gather some data in the CentralAuth database. In order to retroactively set up global accounts, you will have to run the migratePass0.php and migratePass1.php scripts. The first one stores information about your wikis in the CentralAuth database, while the second one uses automatic migration heuristics to generate global accounts. A user can merge their accounts manually via Special:MergeAccount. Dry runs can be used for testing purposes.

To enable global groups, you will have to make an entry into the global_group_permissions table in your CentralAuth database, with ggp_group='steward' and (for access to the group management interface) ggp_permission=globalgrouppermissions. A sample query that is recommended to use is: INSERT INTO global_group_permissions (ggp_group,ggp_permission) VALUES ('steward','globalgrouppermissions'), ('steward','globalgroupmembership');. Then, run migrateStewards.php to promote local stewards to global steward status.

There are various settings you may wish to modify (e.g. whether to provide single sign-on across a whole domain) listed in CentralAuth.php. In particular, you will want to override the default value of $wgCentralAuthDatabase if your CentralAuth database is named something other than 'centralauth'. Make sure you put such settings after the wfLoadExtension line in LocalSettings.php, e.g.:

wfLoadExtension( 'CentralAuth' );
$wgCentralAuthDatabase = 'mycentralauthdatabase';

"SUL2" behavior

  Advertencia: As all logged in users will have a session in the central login wiki, you are recommended to set up a new wiki with as few extensions installed as possible (not using an existing wiki for this purpose). This will reduce the risk for XSS vulnerabilities.
  Advertencia: Universal sign-on may be broken in newer Google Chrome versions due to SameSite cookie policy. To fix it, you need to add:
$wgCookieSameSite = "None";
$wgUseSameSiteLegacyCookies = true;

In addition, you should run your site under HTTPS.

In July 2013 WMF changed its approach to logging users into multiple wikis. When configured for this new approach, after successful login and account creation CentralAuth redirects to Special:CentralLogin/start?token=somevalue on a "central login wiki", which sets cookies on that wiki and then redirects back to the logged-into wiki. It omits the "login/account creation success" page, instead redirecting back to the "returnto" page that the user was originally on. It places 1x1 pixel images in the footer of that page, in place of the icons formerly used on the "login/account creation success" page.

The settings for this are, roughly,

# General CentralAuth configuration
$wgCentralAuthCookies = true;
$wgCentralAuthDatabase = 'centralauthDatabaseName'; // default is 'centralauth'
$wgCentralAuthAutoMigrate = true;
#$wgCentralAuthCookieDomain = '.example.org';
$wgCentralAuthAutoLoginWikis = array(
    # Mapping from domain name to wiki id for other wikis to automatically login into

# Activates the redirect to the "central login wiki"
$wgCentralAuthLoginWiki = 'WikiIdOfLoginWiki';

$wgCentralAuthLoginWiki is the id (usually the database-name) of the wiki to which CentralAuth will redirect on login and create account.

Cache issues

For best results, it is recommended to use memcached. If you have only a single server, accelerator caches (CACHE_ACCEL) like APCu can also work, but do not use them if you have multiple servers. If you have no cache set up (i.e. CACHE_NONE) for $wgMainCacheType, or are using CACHE_DB, then you need to make sure all your wikis use the same caching table.

By default, each wiki in your wiki farm will use the objectcache table in its own database (with its own db prefix) when $wgMainCacheType is set to CACHE_NONE or CACHE_DB. To make this work with CentralAuth, we need to tell the wikis to use a central cache table.

If you want to make a central caching table in the centralauth database (and assuming one of your existing wikis has a database name of enwiki), run code like the following to copy the table to your other database:

CREATE TABLE centralauth.objectcache LIKE enwiki.objectcache

Then add the following config to all wikis to tell them to use the central table instead of their own table:

$wgSharedDB     = 'centralauth'; // or whatever database you use for central data
$wgSharedTables = array( 'objectcache' ); // remember to copy the table structure's to the central database first
$wgCentralAuthSessionCacheType = CACHE_DB; // Tell mediawiki to use objectcache database for central auth.


Since 2023, CentralAuth does not support mixed-protocol HTTP/HTTPS wikis, only pure-HTTPS wikis (with $wgForceHTTPS set to true) and pure-HTTP wikis (primarily for local testing).phab:T348852


Configuration settings in CentralAuth.php
parameter default comment
$wgCentralAuthDatabase 'centralauth' Database name you keep central auth data in.

If this is not on the primary database connection, don't forget to also set up $wgDBservers to have an entry with a groupLoads setting for the 'CentralAuth' group. Alternatively you can use $wgLBFactoryConf to set up an LBFactoryMulti object.

To use a database with a table prefix, set this variable to "{$database}-{$prefix}".

$wgCentralAuthAutoMigrate false If true, existing unattached accounts will be automatically migrated if possible at first login.

Any new account creations will be required to attach.

If false, unattached accounts will not be harassed unless the individual account has opted in to migration.

$wgCentralAuthAutoMigrateNonGlobalAccounts false If true, existing unattached accounts where no global account exists will be compared to see if a merge can be made based on passwords and emails with no clashes (all accounts merge).

This was formerly controlled by $wgCentralAuthAutoMigrate

$wgCentralAuthStrict false If true, remaining accounts which have not been attached will be forbidden from logging in until they are resolved.
$wgCentralAuthDryRun false If true, merging won't actually be possible through the Special:MergeAccount interface.
$wgCentralAuthCookies false If true, global session and token cookies will be set alongside the per-wiki session and login tokens when users log in with a global account.

This allows other wikis on the same domain to transparently log them in.

$wgCentralAuthLoginWiki false Database name of a central login wiki. This is an alternative to directly setting cross-domain cookies for each wiki in $wgCentralAuthAutoLoginWikis. If set, a single login wiki will use a session/cookie to handle unified login sessions across wikis.

On login, users will be redirected to the login wiki's Special:CentralLogin/login page and then redirected to Special:CentralLogin back on the originating wiki. In the process, the central login wiki cookie and session will be set. As the user accesses other wikis, the login wiki will be checked via JavaScript to check login status and set the local session and cookies.

This requires $wgCentralAuthCookies.

$wgCentralAuthCookieDomain '' Domain to set global cookies for.

For instance, '.wikipedia.org' to work on all wikipedia.org subdomains instead of just the current one. Leave blank to set the cookie for the current domain only, such as if all your wikis are hosted on the same subdomain.

$wgCentralAuthCookiePrefix 'centralauth_' Prefix for CentralAuth global authentication cookies.
$wgCentralAuthCookiePath '/' Path for CentralAuth global authentication cookies. Set this variable if you want to restrict cookies to a certain path within the domain specified by $wgCentralAuthCookieDomain.
$wgCentralAuthAutoLoginWikis [] List of wiki IDs which should be called on login to try to set third-party cookies for the global session state.

The wiki ID is typically the database name, except when table prefixes are used, in which case it is the database name, a hyphen separator, and then the table prefix.

This allows a farm with multiple second-level domains to set up a global session on all of them by hitting one wiki from each domain (en.wikipedia.org, en.wikinews.org, etc.).

Done by accessing Special:CentralAutoLogin/start on each wiki.

If empty, no other wikis will be hit.

The key should be set to the cookie domain name.

$wgCentralAuthAutoCreateWikis [] List of wiki IDs on which an attached local account should be created automatically when the global account is created.

The wiki ID is typically the database name, except when table prefixes are used, in which case it is the database name, a hyphen separator, and then the table prefix.

$wgCentralAuthLoginIcon false Local filesystem path to the icon returned by Special:CentralAutoLogin should be a 20x20px PNG.
$wgCentralAuthPrefsForUIReload [ 'skin', 'language', 'thumbsize', 'underline', 'stubthreshold', 'showhiddencats', 'justify', 'numberheadings', 'editondblclick', 'editsection', 'editsectiononrightclick', 'usenewrc', 'extendwatchlist' ] User preferences for which we should recommend reloading the page after a successful central login query.

If you need to do something more complicated than just $userOptionsLookup->getOption( $user, $pref ) !== $userOptionsLookup->getDefaultOption( $pref ), use the hook CentralAuthIsUIReloadRecommended.

$wgCentralAuthRC [] Array of settings for sending the CentralAuth events to the RC Feeds.

@example $wgRCFeeds['example'] = array( 'uri' => "udp://localhost:1336", );

$wgCentralAuthWikisPerSuppressJob 10 Size of wikis handled in one suppress user job. Keep in mind that one wiki requires ~10 queries.
$wgCentralAuthReadOnly false Like $wgReadOnly, used to set extension to database read only mode.

@var bool

$wgCentralAuthEnableGlobalRenameRequest false Feature flag for Special:GlobalRenameRequest.

@var bool

$wgCentralAuthGlobalPasswordPolicies [] Global password policies. These are applied like local password policies, the strongest policy applicable to a user is used. Policies can apply to either a local group (if the user is a member of that group on any wiki, the policy will apply to that user) or global group.

@var array

$wgGlobalRenameDenylist null A list of users who won't be allowed to create new global rename requests through Special:GlobalRenameRequest.

There are two ways to set it:

  • Using a wiki-page: use a Title object to have a wiki-page (MediaWiki:GlobalRenameDenylist for example) as the banned-list. The wiki-page must be a list with one item per line, and must exist otherwise Special:GlobalRenameRequest will throw a MWException.
    Example: $wgGlobalRenameDenylist = Title::makeTitle( NS_MEDIAWIKI, 'GlobalRenameDenylist' );.
  • Using a URL: put a complete URL which must return, using HTTP, a plain-text list of the banned users (and nothing else).
    For example, with a URL pointing to a wiki page: $wgGlobalRenameDenylist = "https://yourwiki/yourpath/index.php?title=MediaWiki:GlobalRenameDenylist&action=raw";

You can use the exact names or regular expressions.

@var Title|string|null

$wgCentralAuthGlobalBlockInterwikiPrefix "global" When globally suppressing a user, a block against this user is inserted in all wikis. CentralAuth will set the author of theses blocks as $wgCentralAuthGlobalBlockInterwikiPrefix>(user-who-made-the-suppression's nickname). For example, if $wgCentralAuthGlobalBlockInterwikiPrefix = "Admins";, and Joe suppresses John, all wikis will show in BlockList a block against John made by Admins>Joe.

@var string


Allows for a single-user login (SUL) system using MediaWiki's AuthPlugin system. User creation and login is done globally using one central user table across all wikis. Note that local user accounts are automatically created on account creation/login however.

This extension also implements global user groups, to which global accounts can belong to.

User rights

CentralAuth defines several new user rights:

User right Abilities Default group Status
centralauth-createlocal Forcibly create a local account for a global account Stewards and sysops Active in MW 1.36+
centralauth-lock Prevent users from logging in on any wiki Stewards Active
centralauth-suppress Suppress or unhide global accounts Stewards Active
centralauth-rename Rename global accounts Stewards Active
centralauth-unmerge Unmerge global accounts from a local account Stewards Active
centralauth-merge Merge all CentralAuth accounts globally All users Active; usually automatic
globalgrouppermissions Manage permissions of global groups Global Stewards Active; not assigned to local stewards by default
globalgroupmembership Edit membership to global groups Global Stewards Active; not assigned to local stewards by default


Single-user login (SUL)

A user with an account on more than one wiki may use Special:MergeAccount to create their global user account, which can then be used on any wiki. Users with the centralauth-unmerge permission (given to stewards by default) can undo a merging of a global account, where the passwords are all reset back to the pre-merge setting. User accounts can now also be renamed globally.

Locking and hiding global users

Screenshot of Special:CentralAuth interface on Meta-Wiki, showing lock/hide interface.

A global account can be locked or hidden by a user with the centralauth-lock and centralauth-suppress permissions, respectively, given to the local group 'stewards' by default. A locked global account will be immediately logged out of any session on any wiki it is currently logged in to. A hidden global account's username is not visible in any logs except the global account log.

Wiki sets

A wiki set is a group of wikis specified by a user with the globalgrouppermissions right. Sets can be opt-in (wikis are not in it by default) or opt-out (wikis are in it unless opted out).

Global user groups

Once you have enabled global user groups as described in the installation section, a migrated steward can use the Special:GlobalGroupPermissions interface to configure global user groups, and their rights. A global user group is active on all wikis (the users in it have its rights on all the wikis) by default, unless the group has been specified to only be active on a specific wiki set (the users in the group only have the rights if they are on a wiki in the set). Global group permissions are not listed at Special:ListUsers, but instead Special:GlobalUsers. They are assigned by a user with the globalgroupmembership permission (by default the global group stewards), and give the specified rights to the user even if the local rights defined by $wgGroupPermissions do not do so.

Licensing and downloads

The extension is available under the GNU General Public License 2.0 or later, and can be downloaded from Git, or accessed via the web-based viewer.

The software is provided as-is. Updates will be made according to the needs of Wikimedia wikis; or where critical vulnerabilities are discovered.



See also