security-and-privacy/CanvasBlocker
security-and-privacy
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CanvasBlocker
mirror of https://github.com/kkapsner/CanvasBlocker
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Simplified require and further linting.

This commit is contained in:
kkapsner 2017-10-06 16:06:31 +02:00
parent 01c1145e28
commit dcb878392e
15 changed files with 86 additions and 78 deletions
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5
.eslintrc.json
View File

@ -21,8 +21,9 @@
"comma-spacing": ["error", { "before": false, "after": true }],
"constructor-super": "warn",
"eqeqeq": "error",
"max-len": ["warn", 120],
"max-lines": ["warn", 200],
"max-len": ["warn", {"code": 120, "tabWidth": 4}],
"max-lines": ["warn", {"max": 400, "skipBlankLines": true, "skipComments": true}],
"max-params": ["warn", 4],
"no-const-assign": "warn",
"no-this-before-super": "warn",
"no-undef": "error",

5
lib/askForPermission.js
View File

@ -56,7 +56,10 @@
if (inDOM){
canvas.scrollIntoView();
var rect = canvas.getBoundingClientRect();
var foundEl = window.document.elementFromPoint(rect.left + rect.width / 2, rect.top + rect.height / 2);
var foundEl = window.document.elementFromPoint(
rect.left + rect.width / 2,
rect.top + rect.height / 2
);
visible = (foundEl === canvas);
}
Object.defineProperty(this, "visible", {value: visible});

8
lib/callingStack.js
View File

@ -13,14 +13,10 @@
scope = window.scope.callingStack;
}
const preferences = require("sdk/simple-prefs");
const prefs = preferences.prefs;
// Translation
var translate = require("sdk/l10n").get;
var _ = function(name, replace, translateAPI){
if (!translateAPI){
translateAPI = translate;
translateAPI = browser.i18n.getMessage;
}
var str = translateAPI(name) || name;
@ -76,7 +72,7 @@
toString: function(translateAPI){
var msg = "";
msg += "\n\n" + _("sourceOutput", undefined, translateAPI) + ": ";
if (prefs.showCompleteCallingStack){
if (settings.showCompleteCallingStack){
msg += callers.reduce(function(stack, c){
return stack + "\n\t" + _("stackEntryOutput", c, translateAPI);
}, "");

6
lib/check.js
View File

@ -14,13 +14,11 @@
}
const lists = require("./lists");
const preferences = require("sdk/simple-prefs");
const prefs = preferences.prefs;
const {parseErrorStack} = require("./callingStack");
const logging = require("./logging");
scope.check = function check({url, errorStack}){
var match = checkBoth(errorStack, url, prefs.blockMode).match(
var match = checkBoth(errorStack, url, settings.blockMode).match(
/^(block|allow|fake|ask)(|Readout|Everything|Context|Input|Internal)$/
);
if (match){
@ -41,7 +39,7 @@
};
function checkBoth(errorStack, url, blockMode){
if (prefs.enableStackList && errorStack && checkStack(errorStack)){
if (settings.enableStackList && errorStack && checkStack(errorStack)){
return "allow";
}
else {

8
lib/colorStatistics.js
View File

@ -27,7 +27,13 @@
var index = String.fromCharCode(r, g, b, a);
var color = this.colors[index];
if (!color){
color = {index, color: [r, g, b, a], count: 0, previousColor: this.minBoundary, nextColor: this.minBoundary.nextColor};
color = {
index,
color: [r, g, b, a],
count: 0,
previousColor: this.minBoundary,
nextColor: this.minBoundary.nextColor
};
this.numberOfColors += 1;
this.minBoundary.nextColor = color;
color.nextColor.previousColor = color;

8
lib/frame.js
View File

@ -34,10 +34,9 @@
return true;
}
}
const _ = require("sdk/l10n").get;
function askWrapper(data){
return ask(data, {
_,
_: browser.i18n.getMessage,
prefs
});
}
@ -159,7 +158,10 @@
if (data["canvasBlocker-unload"]){
enabled = false;
}
if (data.hasOwnProperty("canvasBlocker-sendNotifications") && data["canvasBlocker-sendNotifications"] === tabId){
if (
data.hasOwnProperty("canvasBlocker-sendNotifications") &&
data["canvasBlocker-sendNotifications"] === tabId
){
notice("sending notifications:", notifications);
browser.runtime.sendMessage({
sender: tabId,

52
lib/intercept.js
View File

@ -18,7 +18,6 @@
setRandomSupply(randomSupplies.nonPersistent);
var apiNames = Object.keys(changedFunctions);
var undef;
var exportFunction = require("chrome").Cu.exportFunction;
function setRandomSupplyByType(type){
switch (type){
case "persistent":
@ -86,6 +85,29 @@
}
var funcStatus = changedFunction.getStatus(this, siteStatus);
function notifyCallback(messageId){
notify({
url,
errorStack: error.stack,
messageId,
timestamp: new Date(),
functionName: name,
dataURL:
prefs("storeImageForInspection") &&
prefs("showNotifications")?
(
this instanceof HTMLCanvasElement?
this.toDataURL():
(
this.canvas instanceof HTMLCanvasElement?
this.canvas.toDataURL():
false
)
):
false
});
}
if (funcStatus.active){
if (funcStatus.mode === "ask"){
funcStatus.mode = ask({
@ -100,28 +122,12 @@
return original;
case "fake":
setRandomSupplyByType(prefs("rng"));
var fake = changedFunction.fakeGenerator(prefs, function(messageId){
notify({
url,
errorStack: error.stack,
messageId,
timestamp: new Date(),
functionName: name,
dataURL:
prefs("storeImageForInspection") &&
prefs("showNotifications")?
(
this instanceof HTMLCanvasElement?
this.toDataURL():
(
this.canvas instanceof HTMLCanvasElement?
this.canvas.toDataURL():
false
)
):
false
});
}, window, original);
var fake = changedFunction.fakeGenerator(
prefs,
notifyCallback,
window,
original
);
switch (fake){
case true:
return original;

7
lib/main.js
View File

@ -143,13 +143,6 @@
});
});
// warning("TODO: register unload events - do not know how - there seems to be no way with a WebExtension");
// old code
// const {when: unload} = require("sdk/system/unload");
// unload(function(){
// processes.port.emit("canvasBlocker-unload");
// });
browser.runtime.onInstalled.addListener(function(){
message("CanvasBlocker installed");
browser.storage.local.get("storageVersion").then(function(data){

14
lib/modifiedAPI.js
View File

@ -34,7 +34,11 @@
source = new window.wrappedJSObject.ImageData(0, 0);
}
else if (context instanceof window.CanvasRenderingContext2D){
imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(context, 0, 0, context.canvas.width, context.canvas.height);
imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(
context,
0, 0,
context.canvas.width, context.canvas.height
);
source = imageData.data;
}
else {
@ -365,11 +369,15 @@
},
object: ["WebGLRenderingContext", "WebGL2RenderingContext"],
fakeGenerator: function(prefs, notify, window, original){
return function readPixels(x, y, width, height, format, type, pixels){
return function readPixels(x, y, width, height, format, type, pixels){ // eslint-disable-line max-params
if (!this || canvasSizeShouldBeFaked(this.canvas, prefs)){
notify.call(this, "fakedReadout");
var fakeCanvas = getFakeCanvas(window, this.canvas, prefs);
var {context} = copyCanvasToWebgl(window, fakeCanvas, this instanceof window.WebGLRenderingContext? "webgl": "webgl2");
var {context} = copyCanvasToWebgl(
window,
fakeCanvas,
this instanceof window.WebGLRenderingContext? "webgl": "webgl2"
);
return original.apply(context, window.Array.from(arguments));
}
else {

10
lib/randomSupplies.js
View File

@ -44,7 +44,9 @@
// create the (sub-)domains random numbers if not existing
persistentRnd[domain] = new Uint8Array(128);
window.crypto.getRandomValues(persistentRnd[domain]);
browser.runtime.sendMessage({"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];
};
@ -75,7 +77,7 @@
},
getPixelRng: function(length, window, ignoredColors){
var rng = this.getRng(length, window);
return function(r, g, b, a, i){
return function(r, g, b, a, i){ // eslint-disable-line max-params
var index = String.fromCharCode(r, g, b, a);
if (ignoredColors[index]){
return [r, g, b, a];
@ -101,7 +103,7 @@
return function getConstantPixelRng(length, window, ignoredColors){
var rng = scope.nonPersistent.getRng(1024, window);
return function(r, g, b, a, i){
return function(r, g, b, a, i){ // eslint-disable-line max-params
var index = String.fromCharCode(r, g, b, a);
if (ignoredColors[index]){
return [r, g, b, a];
@ -147,7 +149,7 @@
},
getPixelRng: function(length, window, ignoredColors){
var rng = this.getRng(length, window);
return function(r, g, b, a, i){
return function(r, g, b, a, i){ // eslint-disable-line max-params
var index = String.fromCharCode(r, g, b, a);
if (ignoredColors[index]){
return [r, g, b, a];

18
lib/require.js
View File

@ -1,4 +1,3 @@
/* global settings exportFunction */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@ -10,11 +9,6 @@ function require(module){
var scopeName = module.substr(2).replace(/\..+/, "");
return window.scope[scopeName];
}
else if (module === "chrome"){
return {
Cu: {exportFunction}
};
}
else if (module === "sdk/simple-prefs"){
return {
prefs: settings,
@ -29,18 +23,6 @@ function require(module){
}
};
}
else if (module === "sdk/l10n"){
return {
get: function(key){
return browser.i18n.getMessage(key);
}
};
}
else if (module === "sdk/url"){
return {
URL
};
}
throw new ReferenceError("Unable to get non relative module " + module + "!");
}

6
lib/webgl.js
View File

@ -32,7 +32,8 @@
var program = context.createProgram();
var shader = context.createShader(context.VERTEX_SHADER);
var vertex = "attribute vec4 a_position;\nattribute vec2 a_texCoord;\nvarying vec2 v_texCoord;\nvoid main(){\n\tgl_Position = a_position;\n\tv_texCoord = a_texCoord;\n}";
var vertex = "attribute vec4 a_position;\nattribute vec2 a_texCoord;\nvarying vec2 v_texCoord;\n" +
"void main(){\n\tgl_Position = a_position;\n\tv_texCoord = a_texCoord;\n}";
context.shaderSource(shader, vertex);
context.compileShader(shader);
success = context.getShaderParameter(shader, context.COMPILE_STATUS);
@ -44,7 +45,8 @@
context.attachShader(program, shader);
shader = context.createShader(context.FRAGMENT_SHADER);
var fragmenter = "precision mediump float;\nuniform sampler2D u_image;\nvarying vec2 v_texCoord;\nvoid main(){\n\tgl_FragColor = texture2D(u_image, v_texCoord);\n}";
var fragmenter = "precision mediump float;\nuniform sampler2D u_image;\nvarying vec2 v_texCoord;\n" +
"void main(){\n\tgl_FragColor = texture2D(u_image, v_texCoord);\n}";
context.shaderSource(shader, fragmenter);
context.compileShader(shader);
success = context.getShaderParameter(shader, context.COMPILE_STATUS);

5
pageAction/pageAction.js
View File

@ -122,7 +122,10 @@ Promise.all([
data["canvasBlocker-notifications"].forEach(function(notification){
verbose(notification);
notification.url = new URL(notification.url);
domainNotification(notification.url.hostname, notification.messageId).addNotification(new Notification(notification));
domainNotification(
notification.url.hostname,
notification.messageId
).addNotification(new Notification(notification));
});
}
});

4
test/detectionTest.js
View File

@ -53,7 +53,9 @@ addTest("function length", function(log){
addTest("function code", function(log){
"use strict";
if (!CanvasRenderingContext2D.prototype.getImageData.toString().match(/^\s*function getImageData\s*\(\)\s*\{\s*\[native code\]\s*\}\s*$/)){
if (!CanvasRenderingContext2D.prototype.getImageData.toString().match(
/^\s*function getImageData\s*\(\)\s*\{\s*\[native code\]\s*\}\s*$/
)){
log("unexpected function code:", CanvasRenderingContext2D.prototype.getImageData.toString());
return true;
}

8
test/test.js
View File

@ -20,8 +20,12 @@
show(document.getElementById("top"), topTest());
show(document.getElementById("iframe"), iframeTest());
}
document.querySelector("#top button").addEventListener("click", function(){show(document.getElementById("top"), topTest());});
document.querySelector("#iframe button").addEventListener("click", function(){show(document.getElementById("iframe"), iframeTest());});
document.querySelector("#top button").addEventListener("click", function(){
show(document.getElementById("top"), topTest());
});
document.querySelector("#iframe button").addEventListener("click", function(){
show(document.getElementById("iframe"), iframeTest());
});
}());
function draw(canvas){