security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Trying to get wrappedJSObject of an wrappedJSObject is wrong...

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Fixes #133 and #134.
This commit is contained in:
kkapsner 2017-10-07 23:26:04 +02:00
parent 42ee6e483e
commit eb62521adc
4 changed files with 17 additions and 8 deletions
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7
lib/modifiedAPI.js
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@ -16,6 +16,7 @@
const colorStatistics = require("./colorStatistics");
const logging = require("./logging");
const {copyCanvasToWebgl} = require("./webgl");
const getWrapped = require("sdk/getWrapped");
var randomSupply = null;
@ -30,8 +31,8 @@
var imageData;
var source;
if ((context.canvas.width || 0) * (context.canvas.height || 0) === 0){
imageData = new window.wrappedJSObject.ImageData(0, 0);
source = new window.wrappedJSObject.ImageData(0, 0);
imageData = new getWrapped(window).ImageData(0, 0);
source = new getWrapped(window).ImageData(0, 0);
}
else if (context instanceof window.CanvasRenderingContext2D){
imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(
@ -42,7 +43,7 @@
source = imageData.data;
}
else {
imageData = new window.wrappedJSObject.ImageData(context.canvas.width, context.canvas.height);
imageData = new getWrapped(window).ImageData(context.canvas.width, context.canvas.height);
source = new Uint8Array(imageData.data.length);
window.WebGLRenderingContext.prototype.readPixels.call(
context,