diff options
Diffstat (limited to 'browser/base/content/test/permissions/browser_canvas_rfp_exclusion.js')
| -rw-r--r-- | browser/base/content/test/permissions/browser_canvas_rfp_exclusion.js | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/browser/base/content/test/permissions/browser_canvas_rfp_exclusion.js b/browser/base/content/test/permissions/browser_canvas_rfp_exclusion.js new file mode 100644 index 0000000000..61c9c5bf84 --- /dev/null +++ b/browser/base/content/test/permissions/browser_canvas_rfp_exclusion.js @@ -0,0 +1,194 @@ +/* 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 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * Adapted from browser_canvas_fingerprinting_resistance.js + */ +"use strict"; + +const kUrl = "https://example.com/"; +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)); |