owncloud/core

<?php
/**
 * @author David Christofas <dchristofas@owncloud.com>
 *
 * @copyright Copyright (c) 2021, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\DAV\Files\PublicFiles;

class PublicShareSigner {
    private $token;
    private $fileName;
    private $validUntil;
    private $signingKey;

    public function __construct(String $token, String $fileName, \DateTime $validUntil, String $signingKey) {
        $this->token = $token;
        $this->fileName = $fileName;
        $this->validUntil = $validUntil->format(\DateTime::ATOM);
        $this->signingKey = $signingKey;
    }

    public function getSignature() {
        return \hash_hmac('sha512/256', \implode('|', [$this->token, $this->fileName, $this->validUntil]), $this->signingKey, false);
    }
}