security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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First working webExtesion.

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This commit is contained in:
kkapsner 2017-06-25 22:33:12 +02:00
parent 4ea073132d
commit cba5680406
9 changed files with 266 additions and 310 deletions
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29
lib/randomSupplies.js
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@ -5,6 +5,15 @@
(function(){
"use strict";
var scope;
if ((typeof exports) !== "undefined"){
scope = exports;
}
else {
window.scope.randomSupplies = {};
scope = window.scope.randomSupplies;
}
function getDomain(window){
if (!window.location.href || window.location.href === "about:blank"){
if (window !== window.parent){
@ -19,12 +28,14 @@
const getPersistentRnd = (function(){
var persistentRnd = Object.create(null);
const {process} = require("sdk/remote/child");
process.port.on("canvasBlocker-set-domain-rnd", function(process, {domain, rnd}){
persistentRnd[domain] = new Uint8Array(rnd);
});
process.port.on("canvasBlocker-clear-domain-rnd", function(){
persistentRnd = Object.create(null);
browser.runtime.onMessage.addListener(function(data){
if (data["canvasBlocker-set-domain-rnd"]){
var {domain, rnd} = data["canvasBlocker-set-domain-rnd"];
persistentRnd[domain] = new Uint8Array(rnd);
}
if (data["canvasBlocker-clear-domain-rnd"]){
persistentRnd = Object.create(null);
}
});
return function getPersistentRnd(window){
@ -33,12 +44,12 @@
// create the (sub-)domains random numbers if not existing
persistentRnd[domain] = new Uint8Array(128);
window.crypto.getRandomValues(persistentRnd[domain]);
process.port.emit("canvasBlocker-new-domain-rnd", {domain, rnd: Array.from(persistentRnd[domain])});
browser.runtime.sendMessage({"canvasBlocker-new-domain-rnd": {domain, rnd: Array.from(persistentRnd[domain])}});
}
return persistentRnd[domain];
}
}());
exports.persistent = {
scope.persistent = {
getRng: function(length, window){
var bitSet = getPersistentRnd(window);
@ -60,7 +71,7 @@
}
};
exports.nonPersistent = {
scope.nonPersistent = {
getRng: function(length, window){
// Initialize the random number batch creation
var randomI = 65536;