diff options
Diffstat (limited to 'data/extensions/jsr@javascriptrestrictor/session_hash.js')
| -rw-r--r-- | data/extensions/jsr@javascriptrestrictor/session_hash.js | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/data/extensions/jsr@javascriptrestrictor/session_hash.js b/data/extensions/jsr@javascriptrestrictor/session_hash.js deleted file mode 100644 index 1a3938c..0000000 --- a/data/extensions/jsr@javascriptrestrictor/session_hash.js +++ /dev/null @@ -1,60 +0,0 @@ -/** \file - * \brief A cache for session and domain hashes, used for Farbling - * - * \author Copyright (C) 2021 Matus Svancar - * \author Copyright (C) 2021 Giorgio Maone - * - * \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/>. -// - -/** - * Object for generating and caching domain/session hashes - * getFor method used to get domain hashes from given url - * - * \note cached visited domains with related keys are only deleted after end of the session - */ - -// depends on /nscl/common/CachedStorage.js - -var Hashes = { - async getFor(url){ - let site = getSiteForURL(url); - let {sessionHash, visitedDomains} = await CachedStorage.init({ - sessionHash: null, - visitedDomains: {} - }, "Hashes"); - this.sessionHash = sessionHash ??= gen_random64().toString(); - let siteHashes = visitedDomains[site]; - if (!siteHashes) { - let hmac = sha256.hmac.create(this.sessionHash); - hmac.update(site); - const domainHash = hmac.hex(); - const hash = sha256.create(); - hash.update(JSON.stringify(domainHash)); - // Redefine the domainHash for incognito context: - // Compute the SHA256 hash of the original hash so that the incognito hash is: - // * significantly different to the original domainHash, - // * computationally difficult to revert, - // * the same for all incognito windows (for the same domain). - const incognitoHash = hash.hex(); - visitedDomains[site] = siteHashes = {domainHash, incognitoHash}; - await CachedStorage.save(this); - } - return siteHashes; - } -}; - |