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<?php
/**
* ---------------------------------------------------------------------
*
* GLPI - Gestionnaire Libre de Parc Informatique
*
* http://glpi-project.org
*
* @copyright 2015-2022 Teclib' and contributors.
* @copyright 2003-2014 by the INDEPNET Development Team.
* @licence https://www.gnu.org/licenses/gpl-3.0.html
*
* ---------------------------------------------------------------------
*
* LICENSE
*
* This file is part of GLPI.
*
* 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/>.
*
* ---------------------------------------------------------------------
*/
namespace Glpi\System\Requirement;
/**
* @since 10.0.3
*/
class SessionsSecurityConfiguration extends AbstractRequirement
{
public function __construct()
{
$this->title = __('Security configuration for sessions');
$this->description = __('Ensure security is enforced on session cookies.');
$this->optional = true;
}
protected function check()
{
$cookie_secure = (bool)ini_get('session.cookie_secure');
$cookie_httponly = (bool)ini_get('session.cookie_httponly');
$cookie_samesite = ini_get('session.cookie_samesite');
$is_https_request = ($_SERVER['HTTPS'] ?? 'off') === 'on' || (int)($_SERVER['SERVER_PORT'] ?? null) == 443;
$validated = true;
if ($is_https_request && !$cookie_secure) {
$this->validation_messages[] = __('PHP directive "session.cookie_secure" should be set to "on" when GLPI can be accessed on HTTPS protocol.');
$validated = false;
}
if (!$cookie_httponly) {
$this->validation_messages[] = __('PHP directive "session.cookie_httponly" should be set to "on" to prevent client-side script to access cookie values.');
$validated = false;
}
// 'session.cookie_samesite' can be:
// - 'None': Cookie will be sent in all cross-origin requests (even POST requests).
// This may be dangerous, even if we have CSRF protection on POST requests.
// - 'Lax': Cookie will not be sent in POST cross-origin requests.
// GET requests should not be used to write data, so it should be OK.
// - 'Strict': Cookie will not be sent in cross-origin requests (even GET requests).
// This is the best security, but it will kill session in all requests that came from another app.
// For instance, it will break oauthsso/oauthimap plugins.
// We should consider it as valid, but we should not recommand it.
// - '' (empty): directive will not be sent to the browser, and browser should apply the Lax policy.
if (!in_array(strtolower($cookie_samesite), ['lax', 'strict', ''])) {
$this->validation_messages[] = __('PHP directive "session.cookie_samesite" should be set, at least, to "Lax", to prevent cookie to be sent on cross-origin POST requests.');
$validated = false;
}
$this->validated = $validated;
if ($validated) {
$this->validation_messages[] = __s('Sessions configuration is secured.');
}
}
}
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