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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) 2014-2017 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\Component\Checker; |
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use Jose\Component\Core\JWTInterface; |
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use Jose\Component\Encryption\JWE; |
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use Jose\Component\Signature\JWS; |
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/** |
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* Class HeaderCheckerManager. |
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*/ |
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final class HeaderCheckerManager |
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{ |
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/** |
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* @var HeaderCheckerInterface[] |
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*/ |
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private $checkers = []; |
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/** |
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* HeaderCheckerManager constructor. |
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* |
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* @param HeaderCheckerInterface[] $checkers |
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*/ |
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private function __construct(array $checkers) |
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{ |
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foreach ($checkers as $checker) { |
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$this->add($checker); |
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} |
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} |
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/** |
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* @param HeaderCheckerInterface[] $checkers |
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* |
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* @return HeaderCheckerManager |
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*/ |
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public static function create(array $checkers): HeaderCheckerManager |
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{ |
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return new self($checkers); |
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} |
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/** |
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* @param HeaderCheckerInterface $checker |
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* |
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* @return HeaderCheckerManager |
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*/ |
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private function add(HeaderCheckerInterface $checker): HeaderCheckerManager |
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{ |
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$header = $checker->supportedHeader(); |
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if (array_key_exists($header, $this->checkers)) { |
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throw new \InvalidArgumentException(sprintf('The header checker "%s" is already supported.', $header)); |
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} |
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$this->checkers[$header] = $checker; |
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return $this; |
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} |
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/** |
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* @param JWTInterface $jwt |
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* @param int $component |
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*/ |
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public function check(JWTInterface $jwt, int $component) |
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{ |
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switch (true) { |
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case $jwt instanceof JWS: |
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$this->checkJWS($jwt, $component); |
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break; |
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case $jwt instanceof JWE: |
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$this->checkJWE($jwt, $component); |
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break; |
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default: |
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throw new \InvalidArgumentException('Unsupported argument'); |
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} |
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} |
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/** |
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* @param JWS $jws |
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* @param int $signature |
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*/ |
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public function checkJWS(JWS $jws, int $signature) |
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{ |
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if ($signature > $jws->countSignatures()) { |
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throw new \InvalidArgumentException('Unknown signature index.'); |
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} |
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$protected = $jws->getSignature($signature)->getProtectedHeaders(); |
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$headers = $jws->getSignature($signature)->getHeaders(); |
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$this->checkDuplicatedHeaderParameters($protected, $headers); |
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$this->checkHeaders($protected, $headers); |
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} |
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/** |
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* @param JWE $jwe |
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* @param int $recipient |
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*/ |
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public function checkJWE(JWE $jwe, int $recipient) |
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{ |
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if ($recipient > $jwe->countRecipients()) { |
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throw new \InvalidArgumentException('Unknown recipient index.'); |
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} |
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$protected = $jwe->getSharedProtectedHeaders(); |
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$headers = $jwe->getSharedHeaders(); |
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$recipient = $jwe->getRecipient($recipient)->getHeaders(); |
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$this->checkDuplicatedHeaderParameters($protected, $headers); |
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$this->checkDuplicatedHeaderParameters($protected, $recipient); |
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$this->checkDuplicatedHeaderParameters($headers, $recipient); |
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$unprotected = array_merge( |
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$headers, |
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$recipient |
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); |
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$this->checkHeaders($protected, $unprotected); |
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} |
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/** |
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* @param array $header1 |
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* @param array $header2 |
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*/ |
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private function checkDuplicatedHeaderParameters(array $header1, array $header2) |
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{ |
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$inter = array_intersect_key($header1, $header2); |
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if (!empty($inter)) { |
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throw new \InvalidArgumentException(sprintf('The header contains duplicated entries: %s.', implode(', ', array_keys($inter)))); |
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} |
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} |
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/** |
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* @param array $protected |
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* @param array $headers |
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*/ |
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private function checkHeaders(array $protected, array $headers) |
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{ |
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$checkedHeaders = []; |
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foreach ($this->checkers as $header => $checker) { |
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if ($checker->protectedHeaderOnly()) { |
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if (array_key_exists($header, $protected)) { |
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$checker->checkHeader($protected[$header]); |
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$checkedHeaders[] = $header; |
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} else { |
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throw new \InvalidArgumentException(sprintf('The header "%s" must be protected.', $header)); |
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} |
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} else { |
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if (array_key_exists($header, $protected)) { |
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$checker->checkHeader($protected[$header]); |
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$checkedHeaders[] = $header; |
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} elseif (array_key_exists($header, $headers)) { |
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$checker->checkHeader($headers[$header]); |
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$checkedHeaders[] = $header; |
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} |
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} |
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} |
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if (array_key_exists('crit', $protected)) { |
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if (!is_array($protected['crit'])) { |
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throw new \InvalidArgumentException('The header "crit" mus be a list of header parameters.'); |
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} |
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$diff = array_diff($protected['crit'], $checkedHeaders); |
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if (!empty($diff)) { |
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throw new \InvalidArgumentException(sprintf('One or more headers are marked as critical, but they are missing or have not been checked: %s.', implode(', ', array_values($diff)))); |
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} |
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} elseif (array_key_exists('crit', $headers)) { |
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throw new \InvalidArgumentException('The header parameter "crit" must be protected.'); |
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} |
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} |
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} |
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web-token /
jwt-framework
