security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Added testAPI and canvasAPI

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This commit is contained in:
kkapsner 2020-01-06 15:15:04 +01:00
parent 4337ccbf33
commit e50e9deca4
10 changed files with 177 additions and 256 deletions
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48
test/cspTest.js
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@ -1,48 +1,4 @@
function draw(canvas){
"use strict";
canvas.setAttribute("width", 220);
canvas.setAttribute("height", 30);
const fp_text = "BrowserLeaks,com <canvas> 10";
const ctx = canvas.getContext("2d");
ctx.textBaseline = "top";
ctx.font = "14px 'Arial'";
ctx.textBaseline = "alphabetic";
ctx.fillStyle = "#f60";
ctx.fillRect(125, 1, 62, 20);
ctx.fillStyle = "#069";
ctx.fillText(fp_text, 2, 15);
ctx.fillStyle = "rgba(102, 204, 0, 07)";
ctx.fillText(fp_text, 4, 17);
return ctx;
}
function test(window){
"use strict";
// create window canvas
const canvas = document.createElement("canvas");
// draw image in window canvas
draw(canvas);
return window.HTMLCanvasElement.prototype.toDataURL.call(canvas);
}
async function hash(string){
"use strict";
const buffer = new TextEncoder("utf-8").encode(string);
const hash = await crypto.subtle.digest("SHA-256", buffer);
const chunks = [];
(new Uint32Array(hash)).forEach(function(num){
chunks.push(num.toString(16));
});
return chunks.map(function(chunk){
return "0".repeat(8 - chunk.length) + chunk;
}).join("");
}
/* globals testAPI, canvasAPI*/
const addLine = function(){
"use strict";
@ -60,6 +16,6 @@ addLine("window name after set: " + window.name);
(async function(){
"use strict";
const hashValue = await hash(test(window));
const hashValue = await testAPI.hash(canvasAPI.fingerprint(window).url);
addLine("canvas hash: " + hashValue);
}());