tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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CryptoSafetyChild.sys.mjs (1599B)

      1 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
      2 /* Copyright (c) 2020, The Tor Project, Inc.
      3 *
      4 * This Source Code Form is subject to the terms of the Mozilla Public
      5 * License, v. 2.0. If a copy of the MPL was not distributed with this
      6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      7 
      8 import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
      9 
     10 const lazy = {};
     11 
     12 ChromeUtils.defineESModuleGetters(lazy, {
     13  setTimeout: "resource://gre/modules/Timer.sys.mjs",
     14 });
     15 
     16 XPCOMUtils.defineLazyPreferenceGetter(
     17  lazy,
     18  "isCryptoSafetyEnabled",
     19  "security.cryptoSafety",
     20  true // Defaults to true.
     21 );
     22 
     23 export class CryptoSafetyChild extends JSWindowActorChild {
     24  handleEvent(event) {
     25    if (
     26      !lazy.isCryptoSafetyEnabled ||
     27      // Ignore non-HTTP addresses.
     28      // We do this before reading the host property since this is not available
     29      // for about: pages.
     30      !this.document.documentURIObject.schemeIs("http") ||
     31      // Ignore onion addresses.
     32      this.document.documentURIObject.host.endsWith(".onion") ||
     33      (event.type !== "copy" && event.type !== "cut")
     34    ) {
     35      return;
     36    }
     37 
     38    // We send a message to the parent to inspect the clipboard content.
     39    // NOTE: We wait until next cycle to allow the event to propagate and fill
     40    // the clipboard before being read.
     41    // NOTE: Using navigator.clipboard.readText fails with Wayland. See
     42    // tor-browser#42702.
     43    lazy.setTimeout(() => {
     44      this.sendAsyncMessage("CryptoSafety:CopiedText", {
     45        host: this.document.documentURIObject.host,
     46      });
     47    });
     48  }
     49 }