security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Test cleanup.

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kkapsner 2017-08-13 23:44:31 +02:00
parent d8f6fb1ac9
commit 7d0c9681df
11 changed files with 437 additions and 395 deletions
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test/detectionTest.js Normal file
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var addTest = (function(){
var stati = [
{className: "notRun", text: "not run"},
{className: "loud", text: "CB detected"},
{className: "stealthy", text: "CB not detected"},
{className: "failed", text: "test failed"}
];
var ul = document.getElementById("tests");
return function addTest(name, func){
var logs = [];
function log(){
logs.push(Array.prototype.slice.call(arguments).join(" "));
}
var status = 0;
try {
status = func(log)? 1: 2;
}
catch (e){
console.log(e);
status = 3;
}
var li = document.createElement("li");
li.className = stati[status].className;
var nameNode = document.createElement("span");
nameNode.className = "name";
nameNode.textContent = name;
nameNode.title = func.toString();
li.appendChild(nameNode);
li.appendChild(document.createTextNode(": "));
var statusNode = document.createElement("span");
statusNode.className = "status";
statusNode.textContent = stati[status].text;
statusNode.title = logs.join("\n");
li.appendChild(statusNode);
ul.appendChild(li);
}
}());
addTest("function length", function(log){
if (CanvasRenderingContext2D.prototype.getImageData.length !== 4){
log("expected 4 parameters for getImageData - got", CanvasRenderingContext2D.prototype.getImageData.length);
return true;
}
else {
return false;
}
});
addTest("function code", function(log){
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;
}
else {
return false;
}
});
addTest("function name", function(){return CanvasRenderingContext2D.prototype.getImageData.name !== "getImageData"});
addTest("error provocation 1", function(log){
var canvas = document.createElement('canvas');
var ctx = canvas.getContext("2d");
var canvasBlocker = false;
try{
ctx.getImageData(0, 0, 0, 0);
}
catch (err){
try {
log(err.name);
log(err.toString());
}
catch (e){
canvasBlocker = true;
}
}
return canvasBlocker;
});
addTest("error provocation 2", function(log){
var canvas = document.createElement('canvas');
canvas.width = 0;
var ctx = canvas.getContext("2d");
var canvasBlocker = false;
try{
ctx.getImageData(0, 0, 1, 1);
log("no error provoked");
}
catch (err){
try {
log(err.name);
log(err.toString());
}
catch (e){
canvasBlocker = true;
}
}
return canvasBlocker;
});
addTest("error provocation 3", function(log){
var canvasBlocker = false;
try{
CanvasRenderingContext2D.prototype.getImageData.apply(undefined, [0, 0, 1, 1]);
}
catch (err){
try {
log(err.name);
log(err.toString());
}
catch (e){
canvasBlocker = true;
}
}
return canvasBlocker;
});
function testKnownPixelValue(size, log){
var canvas = document.createElement("canvas");
canvas.height = size;
canvas.width = size;
var context = canvas.getContext("2d");
context.fillStyle = "rgba(0, 127, 255, 1)";
var pixelValues = [0, 127, 255, 255];
context.fillRect(0, 0, canvas.width, canvas.height);
var p = context.getImageData(0, 0, canvas.width, canvas.height).data;
for (var i = 0; i < p.length; i += 1){
if (p[i] !== pixelValues[i%4]){
log("wrong value", p[i], "at", i, "expected", pixelValues[i%4]);
return true;
}
}
return false;
}
addTest("known pixel value test 1", function(log){
return testKnownPixelValue(1, log);
});
addTest("known pixel value test 10", function(log){
return testKnownPixelValue(10, log);
});
addTest("double readout test", function(log){
var canvas = document.createElement("canvas");
var context = canvas.getContext("2d");
var imageData = context.getImageData(0, 0, canvas.width, canvas.height);
for (var i = 0; i < imageData.data.length; i += 1){
if (i % 4 !== 3){
imageData.data[i] = Math.floor(256 * Math.random());
}
else {
imageData.data[i] = 255;
}
}
context.putImageData(imageData, 0, 0);
var imageData1 = context.getImageData(0, 0, canvas.width, canvas.height);
var imageData2 = context.getImageData(0, 0, canvas.width, canvas.height);
for (var i = 0; i < imageData2.data.length; i += 1){
if (imageData1.data[i] !== imageData2.data[i]){
log("mismatch at", i, ":",
imageData1.data[i], "(", imageData1.data[i].toString(2), ")",
"!=",
imageData2.data[i], "(", imageData2.data[i].toString(2), ")",
"| original:", imageData.data[i], "(", imageData.data[i].toString(2), ")"
);
return true;
}
}
return false;
});
addTest("readout - in - out test", function(log){
var canvas = document.createElement("canvas");
var context = canvas.getContext("2d");
var imageData = context.getImageData(0, 0, canvas.width, canvas.height);
for (var i = 0; i < imageData.data.length; i += 1){
if (i % 4 !== 3){
imageData.data[i] = Math.floor(256 * Math.random());
}
else {
imageData.data[i] = 255;
}
}
context.putImageData(imageData, 0, 0);
var imageData1 = context.getImageData(0, 0, canvas.width, canvas.height);
var canvas2 = document.createElement("canvas");
var context2 = canvas2.getContext("2d");
context2.putImageData(imageData1, 0, 0);
var imageData2 = context2.getImageData(0, 0, canvas.width, canvas.height);
for (var i = 0; i < imageData2.data.length; i += 1){
if (imageData1.data[i] !== imageData2.data[i]){
log("mismatch at", i, ":",
imageData1.data[i], "(", imageData1.data[i].toString(2), ")",
"!=",
imageData2.data[i], "(", imageData2.data[i].toString(2), ")"
);
return true;
}
}
return false;
});