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/*
* GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
*
* Copyright (C) 2018 Giorgio Maone <giorgio@maone.net>
*
* This file is part of GNU LibreJS.
*
* GNU LibreJS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNU LibreJS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU LibreJS. If not, see <http://www.gnu.org/licenses/>.
*/
"use strict";
describe("LibreJS' components", () => {
let LibreJS = browser.extension.getBackgroundPage().LibreJS;
let license = {
id: 'GPL-3.0',
url: 'http://www.gnu.org/licenses/gpl-3.0.html',
magnet: 'magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt',
};
let unknownLicense = {
id: 'Acme-proprietary-1.5',
url: 'http://www.acme.com/license-1.5.html',
magnet: 'magnet:?xt=urn:btih:2f739d935676111cfff4b4693e3816e664797050&dn=acme-1.5.txt'
};
let trivial = "1+1";
let nontrivial = `function nt() { document.documentElement.innerHTML=""; nt(); }`;
let licensed = `// @license ${license.magnet} ${license.id}\n${nontrivial}\n// @license-end`;
let unknownLicensed = `// @license ${unknownLicense.magnet} ${unknownLicense.id}\n${nontrivial}\n// @license-end`;
let malformedLicensed = `// @license\n${nontrivial}`;
let tab, documentUrl;
beforeAll(async () => {
let url = browser.extension.getURL("/test/resources/index.html");
tab = (await browser.tabs.query({url}))[0] || (await browser.tabs.create({url}));
documentUrl = url;
});
describe("The external script source processor", () => {
let url = "https://www.gnu.org/mock-script.js";
let processScript = async (source, whitelisted = false) =>
await LibreJS.handle_script({
text: source,
request: {url, tabId: tab.id, documentUrl, frameId: 0},
}, whitelisted);
it("should accept whitelisted scripts", async () => {
expect(await processScript(nontrivial, true) || nontrivial).toContain(nontrivial);
});
it("should block trivial scripts too", async () => {
let processed = await processScript(trivial);
expect(processed || trivial).not.toContain(trivial);
});
it("should block non-trivial scripts", async () => {
let processed = await processScript(nontrivial);
expect(processed || nontrivial).not.toContain(nontrivial);
});
it("should accept scripts with known free license tags", async () => {
let processed = await processScript(licensed);
expect(processed || licensed).toContain(nontrivial);
});
it("should block scripts with unknown license tags", async () => {
let processed = await processScript(unknownLicensed);
expect(processed).not.toContain(nontrivial);
});
it("should block scripts with malformed license tags", async () => {
let processed = await processScript(malformedLicensed);
expect(processed).not.toContain(nontrivial);
});
});
describe("The HTML processor", () => {
let processHtml =
async (html, whitelisted = false) =>
LibreJS.editHtml(html, tab.url, tab.id, 0, whitelisted);
let addScript = (html, script, before = "</head>") =>
html.replace(before, `<script>${script}</script>${before}`);
let addToBody = (html, fragment) => html.replace("</body>", `${fragment}</body>`);
let jsUrl = js => `javascript:${encodeURIComponent(js)}`;
function extractScripts(html, def = "") {
let matches = html && html.match(/<script>[^]*?<\/script>/g);
return matches && matches.join("") || def;
}
let html, nontrivialInHtml;
beforeAll(async () => {
html = (await browser.tabs.executeScript(tab.id, {
runAt: "document_start",
code: "document.documentElement.outerHTML"
}))[0];
nontrivialInHtml = addScript(html, nontrivial);
});
it("should not modify scriptless documents", async () => {
expect(await processHtml(html)).toBeNull();
});
it("should not modify whitelisted documents", async () => {
expect(await processHtml(nontrivialInHtml, true)).toBeNull();
});
it("should accept trivial scripts", async () => {
let trivialInHtml = addScript(html, trivial);
let processed = await processHtml(trivialInHtml);
expect(extractScripts(processed, trivial)).toContain(trivial);
});
it("should block non-trivial scripts", async () => {
let processed = await processHtml(nontrivialInHtml);
expect(extractScripts(processed, nontrivial)).not.toContain(nontrivial);
});
it("should accept scripts with known free license tags", async () => {
let licensedInHtml = addScript(html, licensed);
let processed = await processHtml(licensedInHtml);
expect(extractScripts(processed, licensed)).toContain(nontrivial);
});
it("should block scripts with unknown license tags", async () => {
let unknownInHtml = addScript(html, unknownLicensed);
let processed = await processHtml(unknownInHtml);
expect(extractScripts(processed, nontrivial)).not.toContain(nontrivial);
});
it("should block scripts with malformed license tags", async () => {
let malformedInHtml = addScript(html, malformedLicensed);
let processed = await processHtml(malformedInHtml);
expect(extractScripts(processed, nontrivial)).not.toContain(nontrivial);
});
it("should accept scripts on globally licensed pages", async () => {
let globalLicense = `/* @licstart The following is the entire license notice
for the JavaScript code in this page.
-- Some free license --
@licend The above is the entire license notice for the JavaScript code in this page. */`;
let licensed = addScript(nontrivialInHtml, globalLicense, "<script>");
let processed = await processHtml(html);
expect(extractScripts(processed, licensed)).toContain(nontrivial);
});
it("should discriminate trivial, non-trivial and licensed mixed on the same page", async () => {
let mixedPage = addScript(addScript(nontrivialInHtml, trivial), licensed);
let processed = await processHtml(mixedPage);
expect(processed).not.toBeNull();
let scripts = extractScripts(processed, nontrivial);
expect(scripts).toContain(trivial);
expect(scripts).toContain(licensed);
expect(scripts.replace(licensed, "")).not.toContain(nontrivial);
});
it("should correctly process (de)duplicated inline scripts", async () => {
let trivialAsUrl = jsUrl(trivial);
let nontrivialAsUrl = jsUrl(nontrivial);
let a = (url, label) => `<a href="${url}">${label}</a>`;
let mixedPage = `<body></body>`;
for (let dup = 0; dup < 3; dup++) {
mixedPage = addToBody(mixedPage, a(trivialAsUrl, `Trivial #${dup}`));
mixedPage = addToBody(mixedPage, a(nontrivialAsUrl, `Nontrivial #${dup}`));
}
let processed = await processHtml(mixedPage);
expect(processed).not.toBeNull();
expect(processed).toContain(trivialAsUrl);
expect(processed).not.toContain(nontrivialAsUrl);
});
});
describe("The external (Web Labels) license checker", () => {
let {ExternalLicenses} = LibreJS;
let check;
beforeAll(async () => {
let args = {tabId: tab.id, frameId: 0, documentUrl};
let resolve = url => new URL(url, documentUrl).href;
check = async url => await ExternalLicenses.check(Object.assign({url: resolve(url)}, args));
await browser.tabs.executeScript(tab.id, {
file: "/content/externalLicenseChecker.js"
});
});
it("should recognize free licenses", async () => {
let scriptInfo = await check("jquery.js");
console.debug(scriptInfo);
expect(scriptInfo.free).toBeTruthy();
});
it("should accept scripts if any of multiple licenses is free", async () => {
let scriptInfo = await check("app-trilicensed.js");
console.debug(scriptInfo);
expect(scriptInfo.free).toBeTruthy();
});
it("should block scripts declaring only proprietary license(s)", async () => {
let scriptInfo = await check("proprietary.js");
console.debug(scriptInfo);
expect(scriptInfo.free).toBeFalsy();
});
it("should block scripts not declaring any license", async () => {
let scriptInfo = await check("tracker.js");
console.debug(scriptInfo);
expect(scriptInfo).toBeNull();
});
});
afterAll(async () => {
await browser.tabs.remove(tab.id);
browser.tabs.update((await browser.tabs.getCurrent()).id, {active: true});
});
});
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