mirror of
https://github.com/kkapsner/CanvasBlocker
synced 2024-12-31 17:11:54 +01:00
170 lines
4.5 KiB
PHP
170 lines
4.5 KiB
PHP
<!DOCTYPE html>
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<html>
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<head>
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<title>Data-URL Test</title>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="testIcon.svg" type="image/png" rel="icon">
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<link href="testIcon.svg" type="image/png" rel="shortcut icon">
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<style>
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iframe, object, embed {
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display: block;
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box-sizing: border-box;
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width: 100%;
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height: 7em;
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}
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</style>
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<link rel="stylesheet" href="data:text/css;base64,Ym9keXtiYWNrZ3JvdW5kLWNvbG9yOiNlMGZmZTA7fQ==">
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</head>
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<body>
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<h1>Data-URL test</h1>
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This test might not work properly if any other addon is installed that changes the CSP headers (e.g. NoScript or uBlock Origin).
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<h2>Expected result</h2>
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<ul>
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<li>the "Normal" and "blob" iFrames show faked hashes</li>
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<li>the "Data-URL" iFrame, object and embed shows nothing</li>
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<li>the whole page has a green background</li>
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</ul>
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<h2>Tests</h2>
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<h3>Normal iFrame</h3>
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<iframe src="sendFingerprintTest.html"></iframe>
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<h3>Data-URL iFrame</h3>
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<iframe id="iframe" src="data:text/html;base64,<?php
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echo base64_encode(
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str_replace(
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'const origin = "iframe";',
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'const origin = "data URL iframe";',
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file_get_contents("sendFingerprintTest.html")
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)
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);
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?>"></iframe>
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<h3>blob iFrame</h3>
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<iframe id="blobIframe"></iframe>
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<h3>Data-URL object</h3>
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<object
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type="text/html"
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data="data:text/html;base64,<?php
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echo base64_encode(
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str_replace(
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'const origin = "iframe";',
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'const origin = "data URL object";',
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file_get_contents("sendFingerprintTest.html")
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)
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);
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?>"
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></object>
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<h3>Data-URL embed</h3>
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<embed
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type="text/html"
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src="data:text/html;base64,<?php
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echo base64_encode(
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str_replace(
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'const origin = "iframe";',
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'const origin = "data URL embed";',
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file_get_contents("sendFingerprintTest.html")
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)
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);
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?>"
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></embed>
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<h3>iFrame code</h3>
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<pre id="code"></pre>
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<script src="dataUrlTest.js"></script>
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<div id="log"></div>
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<form id="form" method="POST" action="http://localhost/server/POST-echo.php">
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<input name="internalId" value="id to be used to link the requests">
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<textarea style="display: block;" name="fingerprint"></textarea>
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<button>submit</button>
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</form>
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<script>
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function draw(canvas){
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"use strict";
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canvas.setAttribute("width", 220);
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canvas.setAttribute("height", 30);
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const fp_text = "BrowserLeaks,com <canvas> 10";
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const ctx = canvas.getContext("2d");
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ctx.textBaseline = "top";
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ctx.font = "14px 'Arial'";
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ctx.textBaseline = "alphabetic";
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ctx.fillStyle = "#f60";
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ctx.fillRect(125, 1, 62, 20);
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ctx.fillStyle = "#069";
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ctx.fillText(fp_text, 2, 15);
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ctx.fillStyle = "rgba(102, 204, 0, 07)";
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ctx.fillText(fp_text, 4, 17);
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return ctx;
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}
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function topTest(){
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"use strict";
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// create window canvas
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const canvas = document.createElement("canvas");
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// draw image in window canvas
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const ctx = draw(canvas);
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return {
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imageData: ctx.getImageData(0, 0, canvas.width, canvas.height),
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url: canvas.toDataURL(),
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isPointInPath: getIsPointInPath(ctx)
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};
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}
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function getIsPointInPath(ctx){
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"use strict";
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ctx.beginPath();
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ctx.moveTo(20, 19);
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ctx.lineTo(40, 19);
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ctx.lineTo(30, 30);
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ctx.closePath();
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ctx.stroke();
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return ctx.isPointInPath(30, 19);
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}
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function hashToString(hash){
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"use strict";
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const chunks = [];
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(new Uint32Array(hash)).forEach(function(num){
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chunks.push(num.toString(16));
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});
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return chunks.map(function(chunk){
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return "0".repeat(8 - chunk.length) + chunk;
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}).join("");
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}
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const send = function(){
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"use strict";
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return async function send(form, {url, imageData, isPointInPath}){
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const buffer = new TextEncoder("utf-8").encode(url);
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const hashes = await Promise.all([
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crypto.subtle.digest("SHA-256", buffer),
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crypto.subtle.digest("SHA-256", imageData.data)
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]);
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const data = JSON.stringify({
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urlHash: hashToString(hashes[0]),
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imageDataHash: hashToString(hashes[1]),
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isPointInPath
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}, null, "\t");
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form.fingerprint.value = data;
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const xhr = new XMLHttpRequest();
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xhr.open("POST", form.action + "?main", true);
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xhr.onreadystatechange = function(){
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if (this.readyState === 4){
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const status = this.status;
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if (status === 200 || status === 304) {
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console.log("Sending xhr successful from main page:", data);
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}
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else {
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console.log("Sending xhr failed:", this);
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}
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}
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};
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xhr.send(new FormData(form));
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};
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}();
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send(document.getElementById("form"), topTest());
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</script>
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</body></html> |