Failed Conditions
Push — master ( a80032...387aac )
by Florent
02:22
created

HeaderCheckerManager::check()   A

Complexity

Conditions 3
Paths 3

Size

Total Lines 16
Code Lines 10

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 16
rs 9.4285
c 0
b 0
f 0
cc 3
eloc 10
nc 3
nop 2
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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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/**
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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 HeaderChecker[]
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     */
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    private $checkers = [];
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    /**
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     * @var TokenTypeSupport[]
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     */
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    private $tokenTypes = [];
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    /**
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     * HeaderCheckerManager constructor.
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     *
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     * @param HeaderChecker[]    $checkers
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     * @param TokenTypeSupport[] $tokenTypes
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     */
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    private function __construct(array $checkers, array $tokenTypes)
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    {
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        foreach ($checkers as $checker) {
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            $this->add($checker);
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        }
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        foreach ($tokenTypes as $tokenType) {
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            $this->addTokenTypeSupport($tokenType);
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        }
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    }
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    /**
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     * @param HeaderChecker[]    $checkers
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     * @param TokenTypeSupport[] $tokenTypes
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     *
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     * @return HeaderCheckerManager
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     */
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    public static function create(array $checkers, array $tokenTypes): self
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    {
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        return new self($checkers, $tokenTypes);
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    }
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    /**
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     * @param TokenTypeSupport $tokenType
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     *
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     * @return HeaderCheckerManager
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     */
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    private function addTokenTypeSupport(TokenTypeSupport $tokenType): self
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    {
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        $this->tokenTypes[] = $tokenType;
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        return $this;
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    }
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    /**
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     * @param HeaderChecker $checker
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     *
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     * @return HeaderCheckerManager
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     */
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    private function add(HeaderChecker $checker): self
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    {
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        $header = $checker->supportedHeader();
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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 $component)
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    {
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        foreach ($this->tokenTypes as $tokenType) {
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            if ($tokenType->supports($jwt)) {
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                $protected = [];
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                $unprotected = [];
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                $tokenType->retrieveTokenHeaders($jwt, $component, $protected, $unprotected);
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                $this->checkDuplicatedHeaderParameters($protected, $unprotected);
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                $this->checkHeaders($protected, $unprotected);
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                return;
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            }
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        }
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        throw new \InvalidArgumentException('Unsupported token type.');
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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[] = $header;
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                } elseif (array_key_exists($header, $headers)) {
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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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        $this->checkCriticalHeader($protected, $headers, $checkedHeaders);
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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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     * @param array $checkedHeaders
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     */
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    private function checkCriticalHeader(array $protected, array $headers, array $checkedHeaders)
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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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