security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Refined property descriptor detection test.

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This commit is contained in:
kkapsner 2018-07-11 17:38:01 +02:00
parent 6d1c051323
commit 96118e5690
1 changed files with 54 additions and 34 deletions
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88
test/detectionTest.js
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@ -71,45 +71,64 @@ addTest("function name", function(){
addTest("property descriptor", function(log){
"use strict";
var descriptor = Object.getOwnPropertyDescriptor(CanvasRenderingContext2D.prototype, "getImageData");
var desiredDescriptor = {
value: function getImageData(x, y, w, h){},
writable: true,
enumerable: true,
configurable: true
};
const properties = [
{
object: CanvasRenderingContext2D.prototype,
name: "getImageData",
descriptor: {
value: function getImageData(x, y, w, h){},
writable: true,
enumerable: true,
configurable: true
}
},
{
object: HTMLCanvasElement.prototype,
name: "toDataURL",
descriptor: {
value: function toDataURL(){},
writable: true,
enumerable: true,
configurable: true
}
},
];
return Object.keys(desiredDescriptor).reduce(function(pass, key){
function keyLog(type, expected, got){
log("wrong " + type + " for ", key, "- expected:", expected, "- got:", got);
}
var desiredValue = desiredDescriptor[key];
var value = descriptor[key];
var keyPass = false;
if ((typeof desiredValue) === (typeof value)){
if ((typeof desiredValue) === "function"){
if (value.name !== desiredValue.name){
keyPass = true;
keyLog("function name", desiredValue.name, value.name);
return properties.reduce(function(pass, property){
const desiredDescriptor = property.descriptor;
const descriptor = Object.getOwnPropertyDescriptor(property.object, property.name);
return Object.keys(desiredDescriptor).reduce(function(pass, key){
function keyLog(type, expected, got){
log(property.name + ": wrong " + type + " for ", key, "- expected:", expected, "- got:", got);
}
var desiredValue = desiredDescriptor[key];
var value = descriptor[key];
var keyPass = false;
if ((typeof desiredValue) === (typeof value)){
if ((typeof desiredValue) === "function"){
if (value.name !== desiredValue.name){
keyPass = true;
keyLog("function name", desiredValue.name, value.name);
}
if (value.length !== desiredValue.length){
keyPass = true;
keyLog("function length", desiredValue.length, value.length);
}
}
if (value.length !== desiredValue.length){
keyPass = true;
keyLog("function length", desiredValue.length, value.length);
else {
if (desiredValue !== value){
keyPass = true;
keyLog("value", desiredValue, value);
}
}
}
else {
if (desiredValue !== value){
keyPass = true;
keyLog("value", desiredValue, value);
}
keyPass = true;
keyLog("type", typeof desiredValue, typeof value);
}
}
else {
keyPass = true;
keyLog("type", typeof desiredValue, typeof value);
}
return pass || keyPass;
return pass || keyPass;
}, false) || pass;
}, false);
});
addTest("error provocation 1", function(log){
@ -191,7 +210,8 @@ addTest("error properties", function(log){
log("Error stack starts wrong. Expected:", start, "- got :", err.stack.split(/\n/g, 2)[0]);
canvasBlocker = true;
}
var message = "'getImageData' called on an object that does not implement interface CanvasRenderingContext2D.";
var message = "'getImageData' called on an object that " +
"does not implement interface CanvasRenderingContext2D.";
if (err.message !== message){
log("Error message wrong. Expected: ", message, "- got:", err.message);
canvasBlocker = true;