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/** \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
*/
var Hashes = {
sessionHash : gen_random64().toString(),
visitedDomains : {},
getFor(url){
let site = getSiteForURL(url);
let domainHash = this.visitedDomains[site];
if (!domainHash) {
let hmac = sha256.hmac.create(this.sessionHash);
hmac.update(site);
domainHash = hmac.hex();
this.visitedDomains[site] = domainHash;
}
return {
domainHash
};
}
};
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