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Diffstat (limited to 'data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js')
| -rw-r--r-- | data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js b/data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js deleted file mode 100644 index 2df5996..0000000 --- a/data/extensions/jsr@javascriptrestrictor/wrappingS-DM.js +++ /dev/null @@ -1,107 +0,0 @@ -/** \file - * \brief Wrappers for navigator.deviceMemory property - * - * \see https://xhr.spec.whatwg.org/ - * - * \author Copyright (C) 2019 Libor Polcak - * \author Copyright (C) 2021 Matus Svancar - * - * \license SPDX-License-Identifier: GPL-3.0-or-later - * \license SPDX-License-Identifier: MPL-2.0 - */ -// -// This program 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. -// -// This program 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 this program. If not, see <https://www.gnu.org/licenses/>. -// -// Alternatively, the contents of this file may be used under the terms -// of the Mozilla Public License, v. 2.0, as described below: -// -// 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/. -// -// \copyright Copyright (c) 2020 The Brave Authors. - -/** \file - * This file contains a wrapper for [navigator.deviceMemory](https://developer.mozilla.org/en-US/docs/Web/API/Navigator/deviceMemory). - * \ingroup wrappers - * - * The goal is to prevent fingerprinting by modifying the return value of the `navigator.deviceMemory` parameter. - * - * This wrapper operates with three levels of protection: - * - * * (0) - return random valid value from range [0.25 - real value] - * * (1) - return random valid value from range [0.25 - 8] - * * (2) - return 4 - * - * These approaches are inspired by the algorithms created by [Brave Software](https://brave.com) - * available [here](https://github.com/brave/brave-core/blob/master/chromium_src/third_party/blink/renderer/core/frame/navigator_device_memory.cc). - * - */ - -/* - * Create private namespace - */ -(function() { - var wrappers = [ - { - parent_object: "Navigator.prototype", - parent_object_property: "deviceMemory", - wrapped_objects: [], - helping_code: ` - let dm_prng = alea(domainHash, "navigator.deviceMemory"); - var validValues = [0.25, 0.5, 1.0, 2.0, 4.0, 8.0]; - var ret = 4; - var realValue = navigator.deviceMemory; - if(args[0]!=2 && realValue==0.25){ - ret = realValue; - } - else if(args[0]==0){ - var maxIndex = validValues.indexOf(realValue); - if(maxIndex == -1){ - maxIndex = validValues.length-1; - } - ret = validValues[Math.floor((dm_prng()*(maxIndex+1)))]; - } - else if(args[0]==1){ - ret = validValues[Math.floor(dm_prng()*(validValues.length))]; - } - `, - post_wrapping_code: [ - { - code_type: "object_properties", - parent_object: "Navigator.prototype", - parent_object_property: "deviceMemory", - wrapped_objects: [], - /** \brief replaces navigator.deviceMemory getter - * - * Depending on level chosen this property returns: - * * (0) - random valid value from range [0.25 - real value] - * * (1) - random valid value from range [0.25 - 8] - * * (2) - 4 - */ - wrapped_properties: [ - { - property_name: "get", - property_value: ` - function() { - return ret; - }`, - }, - ], - } - ], - }, - ] - add_wrappers(wrappers); -})(); |