security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Code Releases Activity

Version 0.2.0

Browse source 
Reenabled notifications
Code cleanup.
This commit is contained in:
kkapsner 2015-09-06 15:40:34 +02:00
parent 97e0c6b9cd
commit c10b382c93
7 changed files with 106 additions and 83 deletions
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40
lib/modifiedAPI.js
View file

@ -5,50 +5,48 @@
"use strict";
function getFakeCanvas(window, original){
var canvas = original.cloneNode(true);
var context = window.HTMLCanvasElement.prototype.getContext.call(canvas, "2d");
var imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(context, 0, 0, canvas.width, canvas.height);
var context = window.HTMLCanvasElement.prototype.getContext.call(original, "2d");
var imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(context, 0, 0, original.width, original.height);
var data = imageData.data;
for (var i = 0, l = data.length; i < l; i += 1){
var value = 0xFF - data[i];
if (value > 0x80){
value = value ^ Math.floor(Math.random() * 0x40);
}
else if (value > 0x40){
var value = data[i];
if (value >= 0x80){
value = value ^ Math.floor(Math.random() * 0x20);
}
else if (value > 0x20){
else if (value >= 0x40){
value = value ^ Math.floor(Math.random() * 0x10);
}
else if (value > 0x10){
else if (value >= 0x20){
value = value ^ Math.floor(Math.random() * 0x08);
}
else if (value > 0x08){
else if (value >= 0x10){
value = value ^ Math.floor(Math.random() * 0x04);
}
else if (value > 0x04){
else if (value >= 0x08){
value = value ^ Math.floor(Math.random() * 0x02);
}
else if (value > 0x02){
else if (value >= 0x04){
value = value ^ Math.floor(Math.random() * 0x01);
}
data[i] = 0xFF - value;
data[i] = value;
}
var canvas = original.cloneNode(true);
var context = window.HTMLCanvasElement.prototype.getContext.call(canvas, "2d");
context.putImageData(imageData, 0, 0);
return canvas;
}
function getWindow(canvas){
console.log(canvas);
return canvas.ownerDocument.defaultView;
}
// changed functions and their fakes
exports.changedFunctions = {
getContext: {
mode: "block",
type: "context",
object: "HTMLCanvasElement"
},
toDataURL: {
mode: "fakeReadout",
type: "readout",
object: "HTMLCanvasElement",
fake: function toDataURL(){
var window = getWindow(this);
@ -56,7 +54,7 @@
}
},
toBlob: {
mode: "fakeReadout",
type: "readout",
object: "HTMLCanvasElement",
fake: function toBlob(callback){
var window = getWindow(this);
@ -65,7 +63,7 @@
exportOptions: {allowCallbacks: true}
},
mozGetAsFile: {
mode: "fakeReadout",
type: "readout",
object: "HTMLCanvasElement",
mozGetAsFile: function mozGetAsFile(callbak){
var window = getWindow(this);
@ -73,7 +71,7 @@
}
},
getImageData: {
mode: "fakeReadout",
type: "readout",
object: "CanvasRenderingContext2D",
fake: function getImageData(sx, sy, sw, sh){
var window = getWindow(this.canvas);
@ -88,7 +86,7 @@
}
},
readPixels: {
mode: "fakeReadout",
type: "readout",
object: "WebGLRenderingContext",
fake: function readPixels(x, y, width, height, format, type, pixels){
var window = getWindow(this.canvas);