1 files changed, 134 insertions, 0 deletions
diff --git a/www/wiki/includes/api/ApiQueryTokens.php b/www/wiki/includes/api/ApiQueryTokens.php
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+++ b/www/wiki/includes/api/ApiQueryTokens.php
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+<?php
+/**
+ * Module to fetch tokens via action=query&meta=tokens
+ *
+ * Copyright © 2014 Wikimedia Foundation and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @since 1.24
+ */
+
+/**
+ * Module to fetch tokens via action=query&meta=tokens
+ *
+ * @ingroup API
+ * @since 1.24
+ */
+class ApiQueryTokens extends ApiQueryBase {
+
+	public function execute() {
+		$params = $this->extractRequestParams();
+		$res = [
+			ApiResult::META_TYPE => 'assoc',
+		];
+
+		if ( $this->lacksSameOriginSecurity() ) {
+			$this->addWarning( [ 'apiwarn-tokens-origin' ] );
+			return;
+		}
+
+		$user = $this->getUser();
+		$session = $this->getRequest()->getSession();
+		$salts = self::getTokenTypeSalts();
+		foreach ( $params['type'] as $type ) {
+			$res[$type . 'token'] = self::getToken( $user, $session, $salts[$type] )->toString();
+		}
+
+		$this->getResult()->addValue( 'query', $this->getModuleName(), $res );
+	}
+
+	/**
+	 * Get the salts for known token types
+	 * @return (string|array)[] Returning a string will use that as the salt
+	 *  for User::getEditTokenObject() to fetch the token, which will give a
+	 *  LoggedOutEditToken (always "+\\") for anonymous users. Returning an
+	 *  array will use it as parameters to MediaWiki\Session\Session::getToken(),
+	 *  which will always return a full token even for anonymous users.
+	 */
+	public static function getTokenTypeSalts() {
+		static $salts = null;
+		if ( !$salts ) {
+			$salts = [
+				'csrf' => '',
+				'watch' => 'watch',
+				'patrol' => 'patrol',
+				'rollback' => 'rollback',
+				'userrights' => 'userrights',
+				'login' => [ '', 'login' ],
+				'createaccount' => [ '', 'createaccount' ],
+			];
+			Hooks::run( 'ApiQueryTokensRegisterTypes', [ &$salts ] );
+			ksort( $salts );
+		}
+
+		return $salts;
+	}
+
+	/**
+	 * Get a token from a salt
+	 * @param User $user
+	 * @param MediaWiki\Session\Session $session
+	 * @param string|array $salt A string will be used as the salt for
+	 *  User::getEditTokenObject() to fetch the token, which will give a
+	 *  LoggedOutEditToken (always "+\\") for anonymous users. An array will
+	 *  be used as parameters to MediaWiki\Session\Session::getToken(), which
+	 *  will always return a full token even for anonymous users. An array will
+	 *  also persist the session.
+	 * @return MediaWiki\Session\Token
+	 */
+	public static function getToken( User $user, MediaWiki\Session\Session $session, $salt ) {
+		if ( is_array( $salt ) ) {
+			$session->persist();
+			return call_user_func_array( [ $session, 'getToken' ], $salt );
+		} else {
+			return $user->getEditTokenObject( $salt, $session->getRequest() );
+		}
+	}
+
+	public function getAllowedParams() {
+		return [
+			'type' => [
+				ApiBase::PARAM_DFLT => 'csrf',
+				ApiBase::PARAM_ISMULTI => true,
+				ApiBase::PARAM_TYPE => array_keys( self::getTokenTypeSalts() ),
+			],
+		];
+	}
+
+	protected function getExamplesMessages() {
+		return [
+			'action=query&meta=tokens'
+				=> 'apihelp-query+tokens-example-simple',
+			'action=query&meta=tokens&type=watch|patrol'
+				=> 'apihelp-query+tokens-example-types',
+		];
+	}
+
+	public function isReadMode() {
+		// So login tokens can be fetched on private wikis
+		return false;
+	}
+
+	public function getCacheMode( $params ) {
+		return 'private';
+	}
+
+	public function getHelpUrls() {
+		return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Tokens';
+	}
+}