관리-도구

편집 파일: HS256KeyAnalyzer.php

<?php declare(strict_types=1); /* * The MIT License (MIT) * * Copyright (c) 2014-2020 Spomky-Labs * * This software may be modified and distributed under the terms * of the MIT license. See the LICENSE file for details. */ namespace Jose\Component\KeyManagement\Analyzer; use Base64Url\Base64Url; use Jose\Component\Core\JWK; final class HS256KeyAnalyzer implements KeyAnalyzer { public function analyze(JWK $jwk, MessageBag $bag): void { if ('oct' !== $jwk->get('kty')) { return; } if (!$jwk->has('alg') || 'HS256' !== $jwk->get('alg')) { return; } $k = Base64Url::decode($jwk->get('k')); $kLength = 8 * mb_strlen($k, '8bit'); if ($kLength < 256) { $bag->add(Message::high('HS256 algorithm requires at least 256 bits key length.')); } } }