From 63190ba3dce3c296d734f97be52310cfae310cba Mon Sep 17 00:00:00 2001
From: Matthias Schmidt <gravatronics@live.com>
Date: Mon, 5 Sep 2016 20:59:15 +0200
Subject: [PATCH] Do not rely on mime type for image validation
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

… for those systems without `\finfo`.
---
 .../MediaUploadFileValidationStrategy.class.php    |  2 +-
 .../files/lib/system/upload/UploadFile.class.php   | 14 ++++++--------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/wcfsetup/install/files/lib/system/upload/MediaUploadFileValidationStrategy.class.php b/wcfsetup/install/files/lib/system/upload/MediaUploadFileValidationStrategy.class.php
index 2096fff0cc..f8fceac8d3 100644
--- a/wcfsetup/install/files/lib/system/upload/MediaUploadFileValidationStrategy.class.php
+++ b/wcfsetup/install/files/lib/system/upload/MediaUploadFileValidationStrategy.class.php
@@ -35,7 +35,7 @@ class MediaUploadFileValidationStrategy implements IUploadFileValidationStrategy
 			return false;
 		}
 		
-		if (!empty($this->fileTypeFilters['isImage']) && ($uploadFile->getImageData() === null || !preg_match('~^image/(gif|jpe?g|png)$~i', $uploadFile->getMimeType()))) {
+		if (!empty($this->fileTypeFilters['isImage']) && $uploadFile->getImageData() === null) {
 			$uploadFile->setValidationErrorType('noImage');
 			return false;
 		}
diff --git a/wcfsetup/install/files/lib/system/upload/UploadFile.class.php b/wcfsetup/install/files/lib/system/upload/UploadFile.class.php
index 55ace04329..689bdb7d6b 100644
--- a/wcfsetup/install/files/lib/system/upload/UploadFile.class.php
+++ b/wcfsetup/install/files/lib/system/upload/UploadFile.class.php
@@ -165,14 +165,12 @@ class UploadFile {
 	 * @return	array|null
 	 */
 	public function getImageData() {
-		if (strpos($this->getMimeType(), 'image/') == 0) {
-			if (($imageData = @getimagesize($this->getLocation())) !== false) {
-				return [
-					'width' => $imageData[0],
-					'height' => $imageData[1],
-					'mimeType' => $imageData['mime']
-				];
-			}
+		if (($imageData = @getimagesize($this->getLocation())) !== false) {
+			return [
+				'width' => $imageData[0],
+				'height' => $imageData[1],
+				'mimeType' => $imageData['mime']
+			];
 		}
 		
 		return null;
-- 
2.20.1