123 lines
3.3 KiB
PHP
123 lines
3.3 KiB
PHP
<?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) 2014-2020 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\Encryption;
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use Jose\Component\Checker\HeaderCheckerManager;
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use Jose\Component\Core\JWK;
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use Jose\Component\Core\JWKSet;
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use Jose\Component\Encryption\Serializer\JWESerializerManager;
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use RuntimeException;
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use Throwable;
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class JWELoader
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{
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/**
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* @var JWEDecrypter
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*/
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private $jweDecrypter;
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/**
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* @var null|HeaderCheckerManager
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*/
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private $headerCheckerManager;
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/**
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* @var JWESerializerManager
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*/
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private $serializerManager;
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/**
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* JWELoader constructor.
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*/
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public function __construct(JWESerializerManager $serializerManager, JWEDecrypter $jweDecrypter, ?HeaderCheckerManager $headerCheckerManager)
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{
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$this->serializerManager = $serializerManager;
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$this->jweDecrypter = $jweDecrypter;
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$this->headerCheckerManager = $headerCheckerManager;
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}
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/**
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* Returns the JWE Decrypter object.
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*/
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public function getJweDecrypter(): JWEDecrypter
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{
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return $this->jweDecrypter;
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}
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/**
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* Returns the header checker manager if set.
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*/
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public function getHeaderCheckerManager(): ?HeaderCheckerManager
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{
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return $this->headerCheckerManager;
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}
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/**
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* Returns the serializer manager.
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*/
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public function getSerializerManager(): JWESerializerManager
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{
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return $this->serializerManager;
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}
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/**
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* This method will try to load and decrypt the given token using a JWK.
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* If succeeded, the methods will populate the $recipient variable and returns the JWE.
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*/
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public function loadAndDecryptWithKey(string $token, JWK $key, ?int &$recipient): JWE
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{
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$keyset = new JWKSet([$key]);
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return $this->loadAndDecryptWithKeySet($token, $keyset, $recipient);
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}
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/**
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* This method will try to load and decrypt the given token using a JWKSet.
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* If succeeded, the methods will populate the $recipient variable and returns the JWE.
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*
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* @throws RuntimeException if the data cannot be loaded or decrypted
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*/
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public function loadAndDecryptWithKeySet(string $token, JWKSet $keyset, ?int &$recipient): JWE
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{
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try {
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$jwe = $this->serializerManager->unserialize($token);
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$nbRecipients = $jwe->countRecipients();
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for ($i = 0; $i < $nbRecipients; ++$i) {
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if ($this->processRecipient($jwe, $keyset, $i)) {
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$recipient = $i;
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return $jwe;
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}
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}
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} catch (Throwable $e) {
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// Nothing to do. Exception thrown just after
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}
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throw new RuntimeException('Unable to load and decrypt the token.');
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}
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private function processRecipient(JWE &$jwe, JWKSet $keyset, int $recipient): bool
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{
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try {
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if (null !== $this->headerCheckerManager) {
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$this->headerCheckerManager->check($jwe, $recipient);
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}
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return $this->jweDecrypter->decryptUsingKeySet($jwe, $keyset, $recipient);
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} catch (Throwable $e) {
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return false;
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}
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}
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}
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