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Diffstat (limited to 'data/extensions/jsr@javascriptrestrictor/wrappingS-EME.js')
| -rw-r--r-- | data/extensions/jsr@javascriptrestrictor/wrappingS-EME.js | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/data/extensions/jsr@javascriptrestrictor/wrappingS-EME.js b/data/extensions/jsr@javascriptrestrictor/wrappingS-EME.js deleted file mode 100644 index 822ef1d..0000000 --- a/data/extensions/jsr@javascriptrestrictor/wrappingS-EME.js +++ /dev/null @@ -1,83 +0,0 @@ -/** \file - * \brief This file contains wrappers for the EME standard - * - * \see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMediaKeySystemAccess - * - * \author Copyright (C) 2022 Libor Polcak - * - * \license SPDX-License-Identifier: GPL-3.0-or-later - */ -// -// 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/>. -// - -/** \file - * \ingroup wrappers - * - * `Navigator.requestMediaKeySystemAccess()` provides access to `MediaKeySystemAccess` object that - * allows to query supported encryption mechanisms and other information about the system. - * - * For example, visit https://www.fit.vutbr.cz/~polcak/jsr/hdcp/ and try a different browser or - * computer. - * - * \see https://w3c.github.io/encrypted-media/ - * \see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMediaKeySystemAccess - * \see https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemAccess - * \see https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemAccess/getConfiguration - * - * We provide two modes of protection: - * - * 1. Strict approach prevents accessing the API. - * 2. Farbling approach changes the output to a non-existing key system with 12.5% probability. - */ - -/* - * Create private namespace - */ -(function() { - var helping_code = `var approach = args[0];`; - var wrappers = [ - { - parent_object: "Navigator.prototype", - parent_object_property: "requestMediaKeySystemAccess", - wrapped_objects: [{ - original_name: "Navigator.prototype.requestMediaKeySystemAccess", - wrapped_name: "origMKSA", - }], - helping_code: helping_code, - wrapping_function_args: "keySystem, queriedConfigs, ...args", - wrapping_function_body: ` - if (approach == 2) { - return new Promise(() => {}); // Never resolves - } - else if (approach == 1) { - keySystem = "org.jshelter"; - return origMKSA.call(this, keySystem, queriedConfigs, ...args); - } - else { - var eme_prng = alea(domainHash, "requestMediaKeySystemAccess", keySystem); - var rnd = eme_prng.get_bits(3); - if (rnd == 0) { - keySystem = "org.jshelter"; - return origMKSA.call(this, keySystem, queriedConfigs, ...args); - } - else { - return origMKSA.call(this, keySystem, queriedConfigs, ...args); - } - } - `, - }, - ] - add_wrappers(wrappers); -})() |