ADD file via upload

4 months ago · acb58dff65
parent 9faae6ed27
commit acb58dff65
1 changed files with 170 additions and 0 deletions
--- a/canvas_harness.html
+++ b/canvas_harness.html
@ -0,0 +1,170 @@
+<html>
+<!--
+
+  american fuzzy lop - <canvas> harness
+  -------------------------------------
+ 
+  Written and maintained by Michal Zalewski <lcamtuf@google.com>
+ 
+  Copyright 2013, 2014 Google LLC All rights reserved.
+ 
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at:
+ 
+    http://www.apache.org/licenses/LICENSE-2.0
+ 
+  A simple harness for going through afl-generated test cases, rendering them in
+  the browser environment, and discovering the use of uninitialized memory and
+  similar bugs. This code led to the discovery of a fair number of library and
+  browser security bugs!
+
+  The url_list[] array is a placeholder; for this to work properly, it needs to
+  be initialized with web-reachable paths to individual test cases. This can
+  be done manually or with a simple script.
+
+-->
+
+<body onload="set_images()">
+
+<div id="status"></div>
+
+<div id="image_div"></div>
+
+<canvas height=64 width=64 id=cvs></canvas>
+
+<h2>Results</h2>
+
+<ul id="output"></ul>
+
+<script>
+
+var c = document.getElementById('cvs');
+var ctx = c.getContext('2d');
+
+var url_list = [
+  "images/id:000000,[...].jpg",
+  "images/id:000001,[...].jpg",
+  /* ... */
+  null
+];
+
+var USE_IMAGES = 50;
+var cur_image = 0;
+
+if (location.hash) cur_image = parseInt(location.hash.substr(1));
+
+var loaded = 0;
+var image_obj = [];
+
+var msie_cleanup;
+
+function check_results() {
+
+  var uniques = [];
+
+  clearTimeout(msie_cleanup);
+
+  ctx.clearRect(0, 0, 64, 64);
+
+  uniques.push(image_obj[0].imgdata);
+
+  for (var i = 1; i < USE_IMAGES; i++) {
+
+    if (!image_obj[i].imgdata) continue;
+
+    if (image_obj[0].imgdata != image_obj[i].imgdata) {
+
+      for (var j = 1; j < uniques.length; j++)
+        if (uniques[j] == image_obj[i].imgdata) break;
+
+      if (j == uniques.length) uniques.push(image_obj[i].imgdata);
+
+
+    }
+
+  }
+
+  if (uniques.length > 1) {
+
+    var str = '<li> Image ' + url_list[cur_image] + ' has ' + uniques.length + ' variants: ';
+
+    for (var i = 0; i < uniques.length; i++)
+      str += '<img src="' + uniques[i] + '">';
+
+    document.getElementById('output').innerHTML += str;
+
+  }
+
+  cur_image++;
+  set_images();
+}
+
+
+function count_image() {
+
+  if (!this.complete || this.counted) return;
+
+  this.counted = true;
+
+  loaded++;
+
+  ctx.clearRect(0, 0, 64, 64);
+
+  try {
+    ctx.drawImage(this, 0, 0, 64, 64);
+  } catch (e) { }
+
+  this.imgdata = c.toDataURL();
+
+  if (loaded == USE_IMAGES) check_results();
+}
+
+
+function set_images() {
+
+  loaded = 0;
+
+  document.getElementById('status').innerHTML = 'Now processing ' + cur_image + '...';
+  location.hash = '#' + cur_image;
+
+  if (url_list[cur_image] == null) {
+    alert('Done!');
+    return;
+  }
+
+  restart_images();
+
+  msie_cleanup = setTimeout(check_results, 5000);
+
+  for (var i = 0; i < USE_IMAGES; i++)
+    image_obj[i].src = url_list[cur_image] + '?' + Math.random();
+
+}
+
+
+function restart_images() {
+
+  for (var i = 0; i < USE_IMAGES; i++) 
+    if (image_obj[i]) image_obj[i].counted = true;
+
+  document.getElementById('image_div').innerHTML = '';
+  image_obj = [];
+
+  for (var i = 0; i < USE_IMAGES; i++) {
+
+    image_obj[i] = new Image();
+    image_obj[i].height = 64;
+    image_obj[i].width = 64;
+    image_obj[i].onerror = count_image;
+    image_obj[i].onload = count_image;
+
+    document.getElementById('image_div').appendChild(image_obj[i]);
+
+  }
+
+}
+
+</script>
+
+<iframe src='http://www.cnn.com/'></iframe>