44 lines
1.4 KiB
PHP
44 lines
1.4 KiB
PHP
<?php
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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namespace TYPO3\CMS\Frontend\Cache;
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use TYPO3\CMS\Core\Security\ContentSecurityPolicy\ConsumableNonce;
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/**
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* Substitutes a cached nonce value with the actual nonce value that
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* is valid for the current request, and which is issued as HTTP CSP
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* header during the frontend rendering process.
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*/
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class NonceValueSubstitution
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{
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/**
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* @param array{content: string, nonce: string} $context
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*/
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public function substituteNonce(array $context): ?string
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{
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$currentNonce = $GLOBALS['TYPO3_REQUEST']?->getAttribute('nonce');
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if (!$currentNonce instanceof ConsumableNonce
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|| empty($context['content'])
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|| empty($context['nonce'])
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|| $currentNonce->value === $context['nonce']
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|| !str_contains($context['content'], $context['nonce'])
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) {
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return null;
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}
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return str_replace($context['nonce'], $currentNonce->consumeInline(self::class), $context['content']);
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}
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}
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