X-Git-Url: https://git.toastfreeware.priv.at/toast/cookiecaptcha.git/blobdiff_plain/e497ea879218a9634fbcce850bdc59ff6e963e4d..1bbd72e5fd08c28a5b1b72dca811ed84fe8ef470:/FancyCaptcha.php diff --git a/FancyCaptcha.php b/FancyCaptcha.php index 570488c..4204546 100644 --- a/FancyCaptcha.php +++ b/FancyCaptcha.php @@ -18,13 +18,16 @@ * * 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. + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * - * @addtogroup Extensions + * @file + * @ingroup Extensions */ -if ( defined( 'MEDIAWIKI' ) ) { +if ( !defined( 'MEDIAWIKI' ) ) { + exit; +} global $wgCaptchaDirectory; $wgCaptchaDirectory = "$wgUploadDirectory/captcha"; // bad default :D @@ -35,226 +38,13 @@ $wgCaptchaDirectoryLevels = 0; // To break into subdirectories global $wgCaptchaSecret; $wgCaptchaSecret = "CHANGE_THIS_SECRET!"; -$wgExtensionFunctions[] = 'efFancyCaptcha'; - -function efFancyCaptcha() { - global $wgMessageCache; - require_once( dirname( __FILE__ ) . '/FancyCaptcha.i18n.php' ); - foreach( efFancyCaptchaMessages() as $lang => $messages ) - $wgMessageCache->addMessages( $messages, $lang ); -} - -class FancyCaptcha extends SimpleCaptcha { - /** - * Check if the submitted form matches the captcha session data provided - * by the plugin when the form was generated. - * - * @param WebRequest $request - * @param array $info - * @return bool - */ - function keyMatch( $request, $info ) { - global $wgCaptchaSecret; - - $answer = $request->getVal( 'wpCaptchaWord' ); - $digest = $wgCaptchaSecret . $info['salt'] . $answer . $wgCaptchaSecret . $info['salt']; - $answerHash = substr( md5( $digest ), 0, 16 ); - - if( $answerHash == $info['hash'] ) { - wfDebug( "FancyCaptcha: answer hash matches expected {$info['hash']}\n" ); - return true; - } else { - wfDebug( "FancyCaptcha: answer hashes to $answerHash, expected {$info['hash']}\n" ); - return false; - } - } - - /** - * Insert the captcha prompt into the edit form. - */ - function getForm() { - $info = $this->pickImage(); - if( !$info ) { - die( "out of captcha images; this shouldn't happen" ); - } - - // Generate a random key for use of this captcha image in this session. - // This is needed so multiple edits in separate tabs or windows can - // go through without extra pain. - $index = $this->storeCaptcha( $info ); - - wfDebug( "Captcha id $index using hash ${info['hash']}, salt ${info['salt']}.\n" ); - - $title = Title::makeTitle( NS_SPECIAL, 'Captcha/image' ); - - return "

" . - wfElement( 'img', array( - 'src' => $title->getLocalUrl( 'wpCaptchaId=' . urlencode( $index ) ), - 'width' => $info['width'], - 'height' => $info['height'], - 'alt' => '' ) ) . - "

\n" . - wfElement( 'input', array( - 'type' => 'hidden', - 'name' => 'wpCaptchaId', - 'id' => 'wpCaptchaId', - 'value' => $index ) ) . - "

" . - wfElement( 'input', array( - 'name' => 'wpCaptchaWord', - 'id' => 'wpCaptchaWord', - 'tabindex' => 1 ) ) . // tab in before the edit textarea - "

\n"; - } - - /** - * Select a previously generated captcha image from the queue. - * @fixme subject to race conditions if lots of files vanish - * @return mixed tuple of (salt key, text hash) or false if no image to find - */ - function pickImage() { - global $wgCaptchaDirectory, $wgCaptchaDirectoryLevels; - return $this->pickImageDir( - $wgCaptchaDirectory, - $wgCaptchaDirectoryLevels ); - } - - function pickImageDir( $directory, $levels ) { - if( $levels ) { - $dirs = array(); - - // Check which subdirs are actually present... - $dir = opendir( $directory ); - while( false !== ($entry = readdir( $dir ) ) ) { - if( ctype_xdigit( $entry ) && strlen( $entry ) == 1 ) { - $dirs[] = $entry; - } - } - closedir( $dir ); - - $place = mt_rand( 0, count( $dirs ) - 1 ); - // In case all dirs are not filled, - // cycle through next digits... - for( $j = 0; $j < count( $dirs ); $j++ ) { - $char = $dirs[($place + $j) % count( $dirs )]; - $return = $this->pickImageDir( "$directory/$char", $levels - 1 ); - if( $return ) { - return $return; - } - } - // Didn't find any images in this directory... empty? - return false; - } else { - return $this->pickImageFromDir( $directory ); - } - } - - function pickImageFromDir( $directory ) { - if( !is_dir( $directory ) ) { - return false; - } - $n = mt_rand( 0, $this->countFiles( $directory ) - 1 ); - $dir = opendir( $directory ); - - $count = 0; - - $entry = readdir( $dir ); - $pick = false; - while( false !== $entry ) { - $entry = readdir( $dir ); - if( preg_match( '/^image_([0-9a-f]+)_([0-9a-f]+)\\.png$/', $entry, $matches ) ) { - $size = getimagesize( "$directory/$entry" ); - $pick = array( - 'salt' => $matches[1], - 'hash' => $matches[2], - 'width' => $size[0], - 'height' => $size[1], - 'viewed' => false, - ); - if( $count++ == $n ) { - break; - } - } - } - closedir( $dir ); - return $pick; - } - - /** - * Count the number of files in a directory. - * @return int - */ - function countFiles( $dirname ) { - $dir = opendir( $dirname ); - $count = 0; - while( false !== ($entry = readdir( $dir ) ) ) { - if( $entry != '.' && $entry != '..' ) { - $count++; - } - } - closedir( $dir ); - return $count; - } - - function showImage() { - global $wgOut, $wgRequest; - - $wgOut->disable(); - - $info = $this->retrieveCaptcha(); - if( $info ) { - if( $info['viewed'] ) { - wfHttpError( 403, 'Access Forbidden', "Can't view captcha image a second time." ); - return false; - } - - $info['viewed'] = wfTimestamp(); - $this->storeCaptcha( $info ); - - $salt = $info['salt']; - $hash = $info['hash']; - $file = $this->imagePath( $salt, $hash ); - - if( file_exists( $file ) ) { - global $IP; - require_once "$IP/includes/StreamFile.php"; - wfStreamFile( $file ); - return true; - } - } - wfHttpError( 500, 'Internal Error', 'Requested bogus captcha image' ); - return false; - } - - function imagePath( $salt, $hash ) { - global $wgCaptchaDirectory, $wgCaptchaDirectoryLevels; - $file = $wgCaptchaDirectory; - $file .= DIRECTORY_SEPARATOR; - for( $i = 0; $i < $wgCaptchaDirectoryLevels; $i++ ) { - $file .= $hash{$i}; - $file .= DIRECTORY_SEPARATOR; - } - $file .= "image_{$salt}_{$hash}.png"; - return $file; - } - - /** - * Show a message asking the user to enter a captcha on edit - * The result will be treated as wiki text - * - * @param $action Action being performed - * @return string - */ - function getMessage( $action ) { - $name = 'fancycaptcha-' . $action; - $text = wfMsg( $name ); - # Obtain a more tailored message, if possible, otherwise, fall back to - # the default for edits - return wfEmptyMsg( $name, $text ) ? wfMsg( 'fancycaptcha-edit' ) : $text; - } - -} - -} # End invocation guard +/** + * By default the FancyCaptcha rotates among all available captchas. + * Setting $wgCaptchaDeleteOnSolve to true will delete the captcha + * files when they are correctly solved. Thus the user will need + * something like a cron creating new thumbnails to avoid drying up. + */ +$wgCaptchaDeleteOnSolve = false; -?> +$wgExtensionMessagesFiles['FancyCaptcha'] = dirname( __FILE__ ) . '/FancyCaptcha.i18n.php'; +$wgAutoloadClasses['FancyCaptcha'] = dirname( __FILE__ ) . '/FancyCaptcha.class.php';