119 lines
3.1 KiB
JavaScript
119 lines
3.1 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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(function(){
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"use strict";
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let scope;
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if ((typeof exports) !== "undefined"){
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scope = exports;
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}
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else {
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scope = require.register("./navigator", {});
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}
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const settings = require("./settings");
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const logging = require("./logging");
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const check = require("./check");
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scope.allProperties = [
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"appCodeName", "appName",
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"appVersion", "buildID", "oscpu", "platform",
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"product",
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"productSub", "userAgent", "vendor", "vendorSub"];
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const original = {};
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scope.allProperties.forEach(function(property){
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original[property] = window.navigator[property];
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});
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original["real Firefox version"] = window.navigator.userAgent.replace(/^.+Firefox\//, "");
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let changedValues = {};
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settings.onloaded(function(){
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changedValues = settings.navigatorDetails;
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});
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settings.on("navigatorDetails", function({newValue}){
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changedValues = newValue;
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});
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function getValue(name, stack = []){
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if (stack.indexOf(name) !== -1){
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return "[ERROR: loop in property definition]";
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}
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stack.push(name);
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switch (name){
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case "original value":
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return original[stack[stack.length - 2]];
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case "random":
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return String.fromCharCode(Math.floor(65 + 85 * Math.random()));
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default:
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if (changedValues.hasOwnProperty(name)){
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return parseString(changedValues[name], stack.slice());
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}
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else {
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return original[name];
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}
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}
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}
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function parseString(string, stack){
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return string.replace(/{([a-z[\]_. -]*)}/ig, function(m, name){
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return getValue(name, stack.slice());
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});
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}
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scope.getNavigatorValue = function getNavigatorValue(name){
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return getValue(name);
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};
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function changeHTTPHeader(details){
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const url = new URL(details.url);
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if (
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settings.get("protectNavigator", url) &&
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check.check({url}).mode !== "allow" &&
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(
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!settings.protectedAPIFeatures.hasOwnProperty("userAgent @ navigator") ||
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settings.protectedAPIFeatures["userAgent @ navigator"]
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)
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){
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for (let header of details.requestHeaders){
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if (header.name.toLowerCase() === "user-agent"){
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header.value = getValue("userAgent");
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}
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}
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}
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return details;
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}
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scope.registerHeaderChange = function(){
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logging.message("Register HTTP header modification for navigator protection.");
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if (!browser.webRequest.onBeforeSendHeaders.hasListener(changeHTTPHeader)){
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browser.webRequest.onBeforeSendHeaders.addListener(
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changeHTTPHeader,
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{
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urls: ["<all_urls>"],
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},
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["blocking", "requestHeaders"]);
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}
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};
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scope.unregisterHeaderChange = function(){
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logging.message("Removing header modification for navigator protection.");
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browser.webRequest.onBeforeSendHeaders.removeListener(changeHTTPHeader);
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};
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scope.init = function (){
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settings.onloaded(function(){
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if (!settings.protectNavigator){
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scope.unregisterHeaderChange();
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}
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});
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settings.on("protectNavigator", function({newValue}){
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if (newValue){
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scope.registerHeaderChange();
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}
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else {
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scope.unregisterHeaderChange();
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}
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});
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};
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}()); |