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<?php |
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namespace Parroauth2\Client\Jwt; |
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use Exception; |
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use InvalidArgumentException; |
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use Jose\Component\Core\JWKSet; |
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use Jose\Component\Signature\JWSLoader; |
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use Jose\Component\Signature\JWSVerifier; |
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use Jose\Component\Signature\Serializer\CompactSerializer; |
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use Jose\Component\Signature\Serializer\JWSSerializerManager; |
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/** |
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* Decode utility for JWT |
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* |
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* @todo handle JWE |
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*/ |
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final class JwtDecoder |
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{ |
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/** |
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* @var JWA |
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*/ |
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private $jwa; |
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/** |
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* @var JWSSerializerManager |
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*/ |
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private $serializerManager; |
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/** |
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* JwtParser constructor. |
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* |
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* @param JWA|null $jwa |
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* @param JWSSerializerManager|null $serializerManager |
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*/ |
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public function __construct(?JWA $jwa = null, ?JWSSerializerManager $serializerManager = null) |
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{ |
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$this->jwa = $jwa ?: new JWA(); |
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$this->serializerManager = $serializerManager ?: new JWSSerializerManager([new CompactSerializer()]); |
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} |
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/** |
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* Get the supported algorithms |
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* |
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* @return JWA |
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*/ |
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public function jwa(): JWA |
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{ |
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return $this->jwa; |
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} |
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/** |
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* Define supported algorithms |
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* |
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* @param string[] $algorithms |
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* |
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* @return self A new JwtDecoder instance, with filtered algorithms |
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* |
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* @see JWA::filter() |
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*/ |
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public function supportedAlgorithms(array $algorithms): self |
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{ |
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$decoder = clone $this; |
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$decoder->jwa = $decoder->jwa->filter($algorithms); |
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return $decoder; |
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} |
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/** |
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* Decode the JWT string |
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* |
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* @param string $jwt String to decode |
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* @param JWKSet $keySet Keys to use |
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* |
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* @return JWT |
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* |
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* @throws InvalidArgumentException When cannot decode the JWT string |
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*/ |
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public function decode(string $jwt, JWKSet $keySet): JWT |
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{ |
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$loader = new JWSLoader( |
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$this->serializerManager, |
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new JWSVerifier($this->jwa->manager()), |
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null |
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); |
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try { |
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$decoded = $loader->loadAndVerifyWithKeySet($jwt, $keySet, $signatureOffset); |
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} catch (Exception $e) { |
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throw new InvalidArgumentException('Invalid ID Token or signature', 0, $e); |
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} |
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/** @psalm-suppress PossiblyNullArrayOffset */ |
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$signature = $decoded->getSignatures()[$signatureOffset]; |
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/** @psalm-suppress PossiblyNullArgument */ |
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return new JWT( |
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$jwt, |
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$signature->getProtectedHeader() + $signature->getHeader(), |
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json_decode($decoded->getPayload(), true) |
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); |
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} |
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} |
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b2pweb /
parroauth2-client
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