<?php
-# Prelim in-progress code. Proof of concept for framework, not
-# intended as a real production captcha system!
-
-# Loader for simple captcha feature
-# Include this from LocalSettings.php
+/**
+ * Experimental captcha plugin framework.
+ * Not intended as a real production captcha system; derived classes
+ * can extend the base to produce their fancy images in place of the
+ * text-based test output here.
+ *
+ * Copyright (C) 2005-2007 Brion Vibber <brion@wikimedia.org>
+ * http://www.mediawiki.org/
+ *
+ * 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.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @addtogroup Extensions
+ */
-if ( defined( 'MEDIAWIKI' ) ) {
+if ( !defined( 'MEDIAWIKI' ) ) {
+ exit;
+}
global $wgExtensionFunctions, $wgGroupPermissions;
-$wgExtensionFunctions[] = 'ceSetup';
+$wgExtensionFunctions[] = 'confirmEditSetup';
+$wgExtensionCredits['other'][] = array(
+ 'name' => 'ConfirmEdit',
+ 'author' => 'Brion Vibber',
+ 'url' => 'http://www.mediawiki.org/wiki/Extension:ConfirmEdit',
+ 'description' => 'Simple captcha implementation',
+);
+/**
+ * The 'skipcaptcha' permission key can be given out to
+ * let known-good users perform triggering actions without
+ * having to go through the captcha.
+ *
+ * By default, sysops and registered bot accounts will be
+ * able to skip, while others have to go through it.
+ */
$wgGroupPermissions['*' ]['skipcaptcha'] = false;
$wgGroupPermissions['user' ]['skipcaptcha'] = false;
$wgGroupPermissions['autoconfirmed']['skipcaptcha'] = false;
$wgGroupPermissions['bot' ]['skipcaptcha'] = true; // registered bots
$wgGroupPermissions['sysop' ]['skipcaptcha'] = true;
+/**
+ * List of IP ranges to allow to skip the captcha, similar to the group setting:
+ * "$wgGroupPermission[...]['skipcaptcha'] = true"
+ *
+ * Specific IP addresses or CIDR-style ranges may be used,
+ * for instance:
+ * $wgCaptchaWhitelistIP = array('192.168.1.0/24', '10.1.0.0/16');
+ */
+$wgCaptchaWhitelistIP = false;
+
global $wgCaptcha, $wgCaptchaClass, $wgCaptchaTriggers;
$wgCaptcha = null;
$wgCaptchaClass = 'SimpleCaptcha';
+/**
+ * Actions which can trigger a captcha
+ *
+ * If the 'edit' trigger is on, *every* edit will trigger the captcha.
+ * This may be useful for protecting against vandalbot attacks.
+ *
+ * If using the default 'addurl' trigger, the captcha will trigger on
+ * edits that include URLs that aren't in the current version of the page.
+ * This should catch automated linkspammers without annoying people when
+ * they make more typical edits.
+ *
+ * The captcha code should not use $wgCaptchaTriggers, but CaptchaTriggers()
+ * which also takes into account per namespace triggering.
+ */
$wgCaptchaTriggers = array();
-$wgCaptchaTriggers['edit'] = false; // Would check on every edit
-$wgCaptchaTriggers['addurl'] = true; // Check on edits that add URLs
+$wgCaptchaTriggers['edit'] = false; // Would check on every edit
+$wgCaptchaTriggers['create'] = false; // Check on page creation.
+$wgCaptchaTriggers['addurl'] = true; // Check on edits that add URLs
+$wgCaptchaTriggers['createaccount'] = true; // Special:Userlogin&type=signup
+$wgCaptchaTriggers['badlogin'] = true; // Special:Userlogin after failure
+
+/**
+ * You may wish to apply special rules for captcha triggering on some namespaces.
+ * $wgCaptchaTriggersOnNamespace[<namespace id>][<trigger>] forces an always on /
+ * always off configuration with that trigger for the given namespace.
+ * Leave unset to use the global options ($wgCaptchaTriggers).
+ *
+ * Shall not be used with 'createaccount' (it is not checked).
+ */
+$wgCaptchaTriggersOnNamespace = array();
+
+#Example:
+#$wgCaptchaTriggersOnNamespace[NS_TALK]['create'] = false; //Allow creation of talk pages without captchas.
+#$wgCaptchaTriggersOnNamespace[NS_PROJECT]['edit'] = true; //Show captcha whenever editing Project pages.
+
+/**
+ * Indicate how to store per-session data required to match up the
+ * internal captcha data with the editor.
+ *
+ * 'CaptchaSessionStore' uses PHP's session storage, which is cookie-based
+ * and may fail for anons with cookies disabled.
+ *
+ * 'CaptchaCacheStore' uses $wgMemc, which avoids the cookie dependency
+ * but may be fragile depending on cache configuration.
+ */
+global $wgCaptchaStorageClass;
+$wgCaptchaStorageClass = 'CaptchaSessionStore';
+
+/**
+ * Number of seconds a captcha session should last in the data cache
+ * before expiring when managing through CaptchaCacheStore class.
+ *
+ * Default is a half hour.
+ */
+global $wgCaptchaSessionExpiration;
+$wgCaptchaSessionExpiration = 30 * 60;
+
+/**
+ * Number of seconds after a bad login that a captcha will be shown to
+ * that client on the login form to slow down password-guessing bots.
+ *
+ * Has no effect if 'badlogin' is disabled in $wgCaptchaTriggers or
+ * if there is not a caching engine enabled.
+ *
+ * Default is five minutes.
+ */
+global $wgCaptchaBadLoginExpiration;
+$wgCaptchaBadLoginExpiration = 5 * 60;
/**
* Allow users who have confirmed their e-mail addresses to post
$ceAllowConfirmedEmail = false;
/**
- * Set up message strings for captcha utilities.
+ * Regex to whitelist URLs to known-good sites...
+ * For instance:
+ * $wgCaptchaWhitelist = '#^https?://([a-z0-9-]+\\.)?(wikimedia|wikipedia)\.org/#i';
+ * Local admins can define a whitelist under [[MediaWiki:captcha-addurl-whitelist]]
*/
-function ceSetup() {
- global $wgMessageCache, $wgHooks, $wgCaptcha, $wgCaptchaClass;
- $wgMessageCache->addMessage('captcha-short', "Your edit includes new URL links; as a protection
- against automated spam, you'll need to enter the answer to this
- simple arithmetic test:" );
-
- SpecialPage::addPage( new SpecialPage( 'Captcha', false,
- /*listed*/ false, /*function*/ false, /*file*/ false ) );
-
- $wgCaptcha = new $wgCaptchaClass();
- $wgHooks['EditFilter'][] = array( &$wgCaptcha, 'confirmEdit' );
-}
+$wgCaptchaWhitelist = false;
/**
- * Entry point for Special:Captcha
+ * Additional regexes to check for. Use full regexes; can match things
+ * other than URLs such as junk edits.
+ *
+ * If the new version matches one and the old version doesn't,
+ * toss up the captcha screen.
+ *
+ * @fixme Add a message for local admins to add items as well.
*/
-function wfSpecialCaptcha( $par = null ) {
- global $wgCaptcha;
- switch( $par ) {
- case "image":
- return $wgCaptcha->showImage();
- case "help":
- default:
- return $wgCaptcha->showHelp();
- }
+$wgCaptchaRegexes = array();
+
+/** Register special page */
+global $wgSpecialPages;
+$wgSpecialPages['Captcha'] = array( /*class*/'CaptchaSpecialPage', /*name*/'Captcha' );
+
+$wgConfirmEditIP = dirname( __FILE__ );
+$wgExtensionMessagesFiles['ConfirmEdit'] = "$wgConfirmEditIP/ConfirmEdit.i18n.php";
+
+if ( defined( 'MW_SUPPORTS_EDITFILTERMERGED' ) ) {
+ $wgHooks['EditFilterMerged'][] = 'ConfirmEditHooks::confirmEditMerged';
+} else {
+ $wgHooks['EditFilter'][] = 'ConfirmEditHooks::confirmEdit';
}
+$wgHooks['UserCreateForm'][] = 'ConfirmEditHooks::injectUserCreate';
+$wgHooks['AbortNewAccount'][] = 'ConfirmEditHooks::confirmUserCreate';
+$wgHooks['LoginAuthenticateAudit'][] = 'ConfirmEditHooks::triggerUserLogin';
+$wgHooks['UserLoginForm'][] = 'ConfirmEditHooks::injectUserLogin';
+$wgHooks['AbortLogin'][] = 'ConfirmEditHooks::confirmUserLogin';
-class SimpleCaptcha {
- /**
- * @param EditPage $editPage
- * @param string $newtext
- * @param string $section
- * @return bool true if the captcha should run
- */
- function shouldCheck( &$editPage, $newtext, $section ) {
- global $wgUser;
- if( $wgUser->isAllowed( 'skipcaptcha' ) ) {
- wfDebug( "SimpleCaptcha: user group allows skipping captcha\n" );
- return false;
- }
-
- global $wgEmailAuthentication, $ceAllowConfirmedEmail;
- if( $wgEmailAuthentication && $ceAllowConfirmedEmail &&
- $wgUser->isEmailConfirmed() ) {
- wfDebug( "SimpleCaptcha: user has confirmed mail, skipping captcha\n" );
- return false;
- }
-
- global $wgCaptchaTriggers;
- if( !empty( $wgCaptchaTriggers['edit'] ) ) {
- // Check on all edits
- wfDebug( "SimpleCaptcha: checking all edits...\n" );
- return true;
- }
-
- if( !empty( $wgCaptchaTriggers['addurl'] ) ) {
- // Only check edits that add URLs
- $oldtext = $this->loadText( $editPage, $section );
-
- $oldLinks = $this->findLinks( $oldtext );
- $newLinks = $this->findLinks( $newtext );
-
- $addedLinks = array_diff( $newLinks, $oldLinks );
- $numLinks = count( $addedLinks );
-
- if( $numLinks > 0 ) {
- wfDebug( "SimpleCaptcha: found $numLinks new links; triggered...\n" );
- return true;
- }
- }
-
- return false;
- }
-
- function confirmEdit( &$editPage, $newtext, $section ) {
- if( $this->shouldCheck( $editPage, $newtext, $section ) ) {
- if( $this->keyMatch() ) {
- wfDebug( "ConfirmEdit given proper key from form, passing.\n" );
- return true;
- } else {
- wfDebug( "ConfirmEdit missing form key, prompting.\n" );
- $editPage->showEditForm( array( &$this, 'formCallback' ) );
- return false;
- }
- } else {
- wfDebug( "ConfirmEdit: no new links.\n" );
- return true;
- }
- }
-
- function keyMatch() {
- if( !isset( $_SESSION['ceAnswerVar'] ) ) {
- wfDebug( "ConfirmEdit no session captcha key set, this is new visitor.\n" );
- return false;
- }
- global $wgRequest;
- return $wgRequest->getVal( $_SESSION['ceAnswerVar'] ) == $_SESSION['ceAnswer'];
- }
-
- function formCallback( &$out ) {
- $source = 'ceSource' . mt_rand();
- $dest = 'ceConfirm' . mt_rand();
-
- $a = mt_rand(0, 100);
- $b = mt_rand(0, 10);
- $op = mt_rand(0, 1) ? '+' : '-';
-
- $test = "$a $op $b";
- $answer = ($op == '+') ? ($a + $b) : ($a - $b);
- $_SESSION['ceAnswer'] = $answer;
- $_SESSION['ceAnswerVar'] = $dest;
-
-
- $out->addWikiText( wfMsg( "captcha-short" ) );
- $out->addHTML( <<<END
- <p><span id="$source"><label for="$dest">$test</label></span> = <input name="$dest" id="$dest" /></p>
-END
- );
- }
-
- function loadText( $editPage, $section ) {
- $rev = Revision::newFromTitle( $editPage->mTitle );
- if( is_null( $rev ) ) {
- return "";
- } else {
- $text = $rev->getText();
- if( $section != '' ) {
- return Article::getSection( $text, $section );
- } else {
- return $text;
- }
- }
- }
-
- function findLinks( $text ) {
- $regex = '/((?:' . HTTP_PROTOCOLS . ')' . EXT_LINK_URL_CLASS . '+)/';
-
- if( preg_match_all( $regex, $text, $matches, PREG_PATTERN_ORDER ) ) {
- return $matches[1];
- } else {
- return array();
- }
- }
-
- function showHelp() {
- global $wgOut, $ceAllowConfirmedEmail;
- $wgOut->setPageTitle( 'Captcha help' );
- $wgOut->addWikiText( <<<END
- So what's this wacky captcha thing about?
-
- It's your enemy. It's here to kill you. RUN WHILE YOU STILL CAN
-END
- );
+$wgAutoloadClasses['ConfirmEditHooks']
+ = $wgAutoloadClasses['SimpleCaptcha']
+ = $wgAutoloadClasses['CaptchaSessionStore']
+ = $wgAutoloadClasses['CaptchaCacheStore']
+ = $wgAutoloadClasses['CaptchaSpecialPage']
+ = "$wgConfirmEditIP/ConfirmEdit_body.php";
+
+/**
+ * Set up $wgWhitelistRead
+ */
+function confirmEditSetup() {
+ global $wgGroupPermissions, $wgCaptchaTriggers;
+ if( !$wgGroupPermissions['*']['read'] && $wgCaptchaTriggers['badlogin'] ) {
+ // We need to ensure that the captcha interface is accessible
+ // so that unauthenticated users can actually get in after a
+ // mistaken password typing.
+ global $wgWhitelistRead;
+ $image = Title::makeTitle( NS_SPECIAL, 'Captcha/image' );
+ $help = Title::makeTitle( NS_SPECIAL, 'Captcha/help' );
+ $wgWhitelistRead[] = $image->getPrefixedText();
+ $wgWhitelistRead[] = $help->getPrefixedText();
}
-
}
-} # End invocation guard
-?>
ToastFreeware / toast / cookiecaptcha.git / blobdiff