From 7355d0e2db2ab6e8778a6cba3846605bb786970f Mon Sep 17 00:00:00 2001
From: David Capello <david@igarastudio.com>
Date: Mon, 3 Aug 2020 17:33:15 -0300
Subject: [PATCH] Add minor checks of .ase header

---
 src/dio/aseprite_decoder.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/dio/aseprite_decoder.cpp b/src/dio/aseprite_decoder.cpp
index fceaa0a60..2dd8e2470 100644
--- a/src/dio/aseprite_decoder.cpp
+++ b/src/dio/aseprite_decoder.cpp
@@ -1,5 +1,5 @@
 // Aseprite Document IO Library
-// Copyright (c) 2018-2019 Igara Studio S.A.
+// Copyright (c) 2018-2020 Igara Studio S.A.
 // Copyright (c) 2001-2018 David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -39,6 +39,22 @@ bool AsepriteDecoder::decode()
     return false;
   }
 
+  if (header.depth != 32 &&
+      header.depth != 16 &&
+      header.depth != 8) {
+    delegate()->error(
+      fmt::format("Invalid color depth {0}",
+                  header.depth));
+    return false;
+  }
+
+  if (header.width < 1 || header.height < 1) {
+    delegate()->error(
+      fmt::format("Invalid sprite size {0}x{1}",
+                  header.width, header.height));
+    return false;
+  }
+
   // Create the new sprite
   std::unique_ptr<doc::Sprite> sprite(
     new doc::Sprite(doc::ImageSpec(header.depth == 32 ? doc::ColorMode::RGB: