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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2020 (original work) Open Assessment Technologies SA; |
| 19 | */ |
| 20 | |
| 21 | declare(strict_types=1); |
| 22 | |
| 23 | namespace oat\taoLti\models\classes\Security\Business\Service; |
| 24 | |
| 25 | use Exception; |
| 26 | use oat\tao\model\service\InjectionAwareService; |
| 27 | use oat\taoLti\models\classes\Security\Business\Contract\SecretKeyServiceInterface; |
| 28 | use oat\taoLti\models\classes\Security\Business\Domain\Exception\SecretKeyGenerationException; |
| 29 | |
| 30 | final class SecretKeyService extends InjectionAwareService implements SecretKeyServiceInterface |
| 31 | { |
| 32 | /** @var int */ |
| 33 | private $length; |
| 34 | |
| 35 | /** @noinspection MagicMethodsValidityInspection */ |
| 36 | /** @noinspection PhpMissingParentConstructorInspection */ |
| 37 | public function __construct(int $length) |
| 38 | { |
| 39 | $this->length = $length; |
| 40 | } |
| 41 | |
| 42 | public function generate(): string |
| 43 | { |
| 44 | try { |
| 45 | return substr(bin2hex(random_bytes((int)ceil($this->length / 2))), 0, $this->length); |
| 46 | } catch (Exception $exception) { |
| 47 | throw SecretKeyGenerationException::create($exception); |
| 48 | } |
| 49 | } |
| 50 | } |