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- This test failed 3 times in the preceding 30 days. quicksearch this test
- Manifest: browser/base/content/test/permissions/browser.toml
/* 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
*
* Adapted from browser_canvas_fingerprinting_resistance.js
*/
"use strict";
var gPlacedData = false;
function initTab(performReadbackTest) {
let contentWindow = content.wrappedJSObject;
let drawCanvas = (fillStyle, id) => {
let contentDocument = contentWindow.document;
let width = 64,
height = 64;
let canvas = contentDocument.createElement("canvas");
if (id) {
canvas.setAttribute("id", id);
}
canvas.setAttribute("width", width);
canvas.setAttribute("height", height);
contentDocument.body.appendChild(canvas);
let context = canvas.getContext("2d");
context.fillStyle = fillStyle;
context.fillRect(0, 0, width, height);
return canvas;
};
let canvas = drawCanvas("cyan", "canvas-id-canvas");
let placedData = canvas.toDataURL();
if (performReadbackTest) {
is(
canvas.toDataURL(),
placedData,
"Reading the placed data twice didn't match"
);
return placedData;
}
return undefined;
}
function disableResistFingerprinting() {
return SpecialPowers.pushPrefEnv({
set: [
["privacy.resistFingerprinting", false],
["privacy.resistFingerprinting.pbmode", false],
],
});
}
function enableResistFingerprinting(RfpNonPbmExclusion, RfpDomainExclusion) {
if (RfpNonPbmExclusion && RfpDomainExclusion) {
return SpecialPowers.pushPrefEnv({
set: [
["privacy.resistFingerprinting.pbmode", true],
["privacy.resistFingerprinting.exemptedDomains", "example.com"],
],
});
} else if (RfpNonPbmExclusion) {
return SpecialPowers.pushPrefEnv({
set: [["privacy.resistFingerprinting.pbmode", true]],
});
} else if (RfpDomainExclusion) {
return SpecialPowers.pushPrefEnv({
set: [
["privacy.resistFingerprinting", true],
["privacy.resistFingerprinting.exemptedDomains", "example.com"],
],
});
}
return SpecialPowers.pushPrefEnv({
set: [["privacy.resistFingerprinting", true]],
});
}
function extractCanvasData(
placedData,
isPbm,
RfpNonPbmExclusion,
RfpDomainExclusion
) {
let contentWindow = content.wrappedJSObject;
let canvas = contentWindow.document.getElementById("canvas-id-canvas");
let canvasData = canvas.toDataURL();
if (RfpDomainExclusion) {
is(
canvasData,
placedData,
`A: RFP, domain exempted, canvas data == placed data (isPbm: ${isPbm}, RfpNonPbmExclusion: ${RfpNonPbmExclusion}, RfpDomainExclusion: ${RfpDomainExclusion})`
);
} else if (!isPbm && RfpNonPbmExclusion) {
is(
canvasData,
placedData,
`B: RFP, nonPBM exempted, not in PBM, canvas data == placed data (isPbm: ${isPbm}, RfpNonPbmExclusion: ${RfpNonPbmExclusion}, RfpDomainExclusion: ${RfpDomainExclusion})`
);
} else if (isPbm && RfpNonPbmExclusion) {
isnot(
canvasData,
placedData,
`C: RFP, nonPBM exempted, in PBM, canvas data != placed data (isPbm: ${isPbm}, RfpNonPbmExclusion: ${RfpNonPbmExclusion}, RfpDomainExclusion: ${RfpDomainExclusion})`
);
} else {
isnot(
canvasData,
placedData,
`D: RFP, domain not exempted, nonPBM not exempted, canvas data != placed data (isPbm: ${isPbm}, RfpNonPbmExclusion: ${RfpNonPbmExclusion}, RfpDomainExclusion: ${RfpDomainExclusion})`
);
}
}
async function populatePlacedData() {
let win = await BrowserTestUtils.openNewBrowserWindow();
await disableResistFingerprinting();
await BrowserTestUtils.withNewTab(
{
gBrowser: win.gBrowser,
url: kUrl,
},
async function () {
let browser = win.gBrowser.selectedBrowser;
gPlacedData = await SpecialPowers.spawn(
browser,
[/* performReadbackTest= */ true],
initTab
);
}
);
await BrowserTestUtils.closeWindow(win);
await SpecialPowers.popPrefEnv();
}
async function rfpExclusionTestOnCanvas(
win,
placedData,
isPbm,
RfpNonPbmExclusion,
RfpDomainExclusion
) {
let browser = win.gBrowser.selectedBrowser;
await SpecialPowers.spawn(
browser,
[/* performReadbackTest= */ false],
initTab
);
await SpecialPowers.spawn(
browser,
[placedData, isPbm, RfpNonPbmExclusion, RfpDomainExclusion],
extractCanvasData
);
}
async function testCanvasRfpExclusion(
isPbm,
RfpNonPbmExclusion,
RfpDomainExclusion
) {
let win = await BrowserTestUtils.openNewBrowserWindow({
private: isPbm,
});
await enableResistFingerprinting(RfpNonPbmExclusion, RfpDomainExclusion);
await BrowserTestUtils.withNewTab(
{
gBrowser: win.gBrowser,
url: kUrl,
},
rfpExclusionTestOnCanvas.bind(
null,
win,
gPlacedData,
isPbm,
RfpNonPbmExclusion,
RfpDomainExclusion
)
);
await BrowserTestUtils.closeWindow(win);
await SpecialPowers.popPrefEnv();
}
add_task(populatePlacedData.bind(null));
add_task(testCanvasRfpExclusion.bind(null, false, false, false));
add_task(testCanvasRfpExclusion.bind(null, false, false, true));
add_task(testCanvasRfpExclusion.bind(null, false, true, false));
add_task(testCanvasRfpExclusion.bind(null, false, true, true));
add_task(testCanvasRfpExclusion.bind(null, true, false, false));
add_task(testCanvasRfpExclusion.bind(null, true, false, true));
add_task(testCanvasRfpExclusion.bind(null, true, true, false));
add_task(testCanvasRfpExclusion.bind(null, true, true, true));