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<?php |
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declare(strict_types=1); |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2019 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace Jose\Easy; |
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use Jose\Component\Checker\HeaderChecker; |
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use Jose\Component\Checker\InvalidHeaderException; |
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/** |
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* This class is a header parameter checker. |
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* When the "enc" header parameter is present, it will check if the value is within the allowed ones. |
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*/ |
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final class ContentEncryptionAlgorithmChecker implements HeaderChecker |
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{ |
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private const HEADER_NAME = 'enc'; |
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/** |
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* @var bool |
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*/ |
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private $protectedHeader = false; |
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/** |
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* @var string[] |
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*/ |
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private $supportedAlgorithms; |
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/** |
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* @param string[] $supportedAlgorithms |
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*/ |
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public function __construct(array $supportedAlgorithms, bool $protectedHeader = false) |
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{ |
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$this->supportedAlgorithms = $supportedAlgorithms; |
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$this->protectedHeader = $protectedHeader; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws InvalidHeaderException if the header is invalid |
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*/ |
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public function checkHeader($value): void |
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{ |
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if (!\is_string($value)) { |
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throw new InvalidHeaderException('"enc" must be a string.', self::HEADER_NAME, $value); |
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} |
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if (!\in_array($value, $this->supportedAlgorithms, true)) { |
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throw new InvalidHeaderException('Unsupported algorithm.', self::HEADER_NAME, $value); |
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} |
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} |
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public function supportedHeader(): string |
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{ |
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return self::HEADER_NAME; |
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} |
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public function protectedHeaderOnly(): bool |
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{ |
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return $this->protectedHeader; |
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} |
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} |
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web-token /
jwt-framework
