101 lines
2.9 KiB
PHP
101 lines
2.9 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Jose\Component\Signature;
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use Exception;
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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\Signature\Serializer\JWSSerializerManager;
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use Throwable;
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/**
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* @see \Jose\Tests\Component\Signature\JWSLoaderTest
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*/
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class JWSLoader
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{
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public function __construct(
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private readonly JWSSerializerManager $serializerManager,
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private readonly JWSVerifier $jwsVerifier,
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private readonly ?HeaderCheckerManager $headerCheckerManager
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) {
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}
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/**
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* Returns the JWSVerifier associated to the JWSLoader.
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*/
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public function getJwsVerifier(): JWSVerifier
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{
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return $this->jwsVerifier;
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}
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/**
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* Returns the Header Checker Manager associated to the JWSLoader.
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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 JWSSerializer associated to the JWSLoader.
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*/
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public function getSerializerManager(): JWSSerializerManager
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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 verify the token using the given key. It returns a JWS and will populate the
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* $signature variable in case of success, otherwise an exception is thrown.
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*/
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public function loadAndVerifyWithKey(string $token, JWK $key, ?int &$signature, ?string $payload = null): JWS
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{
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$keyset = new JWKSet([$key]);
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return $this->loadAndVerifyWithKeySet($token, $keyset, $signature, $payload);
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}
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/**
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* This method will try to load and verify the token using the given key set. It returns a JWS and will populate the
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* $signature variable in case of success, otherwise an exception is thrown.
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*/
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public function loadAndVerifyWithKeySet(
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string $token,
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JWKSet $keyset,
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?int &$signature,
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?string $payload = null
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): JWS {
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try {
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$jws = $this->serializerManager->unserialize($token);
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$nbSignatures = $jws->countSignatures();
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for ($i = 0; $i < $nbSignatures; ++$i) {
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if ($this->processSignature($jws, $keyset, $i, $payload)) {
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$signature = $i;
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return $jws;
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}
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}
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} catch (Throwable) {
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// Nothing to do. Exception thrown just after
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}
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throw new Exception('Unable to load and verify the token.');
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}
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private function processSignature(JWS $jws, JWKSet $keyset, int $signature, ?string $payload): bool
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{
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try {
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if ($this->headerCheckerManager !== null) {
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$this->headerCheckerManager->check($jws, $signature);
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}
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return $this->jwsVerifier->verifyWithKeySet($jws, $keyset, $signature, $payload);
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} catch (Throwable) {
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return false;
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}
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}
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}
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