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<?php |
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declare(strict_types=1); |
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namespace TMV\OpenIdClient\AuthMethod; |
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use Jose\Component\Core\AlgorithmManager; |
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use Jose\Component\Core\JWK; |
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use Jose\Component\Signature\Algorithm\HS256; |
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use Jose\Component\Signature\JWSBuilder; |
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use Jose\Component\Signature\Serializer\CompactSerializer; |
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use Jose\Component\Signature\Serializer\Serializer; |
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use TMV\OpenIdClient\ClientInterface as OpenIDClient; |
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use TMV\OpenIdClient\Exception\InvalidArgumentException; |
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final class ClientSecretJwt extends AbstractJwtAuth |
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{ |
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/** @var JWSBuilder */ |
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private $jwsBuilder; |
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/** @var Serializer */ |
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private $jwsSerializer; |
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/** |
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* ClientSecretJwt constructor. |
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* |
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* @param null|JWSBuilder $jwsBuilder |
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* @param null|Serializer $jwsSerializer |
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*/ |
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public function __construct( |
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?JWSBuilder $jwsBuilder = null, |
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?Serializer $jwsSerializer = null |
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) { |
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$this->jwsBuilder = $jwsBuilder ?: new JWSBuilder(new AlgorithmManager([new HS256()])); |
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$this->jwsSerializer = $jwsSerializer ?: new CompactSerializer(); |
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} |
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public function getSupportedMethod(): string |
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{ |
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return 'client_secret_jwt'; |
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} |
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protected function createAuthJwt(OpenIDClient $client, array $claims = []): string |
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{ |
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$issuer = $client->getIssuer(); |
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$issuerMetadata = $issuer->getMetadata(); |
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$clientId = $client->getMetadata()->getClientId(); |
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$clientSecret = $client->getMetadata()->getClientSecret(); |
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if (! $clientSecret) { |
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throw new InvalidArgumentException($this->getSupportedMethod() . ' cannot be used without client_secret metadata'); |
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} |
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$jwk = new JWK([ |
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'kty' => 'oct', |
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'k' => $clientSecret, |
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]); |
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$time = \time(); |
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$jti = \bin2hex(\random_bytes(32)); |
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/** @var string $payload */ |
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$payload = \json_encode(\array_merge( |
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$claims, |
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[ |
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'iss' => $clientId, |
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'sub' => $clientId, |
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'aud' => $issuerMetadata->getIssuer(), |
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'iat' => $time, |
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'exp' => $time + 60, |
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'jti' => $jti, |
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] |
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)); |
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$jws = $this->jwsBuilder->create() |
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->withPayload($payload) |
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->addSignature($jwk, ['alg' => 'HS256', 'jti' => $jti]) |
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->build(); |
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return $this->jwsSerializer->serialize($jws, 0); |
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} |
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} |
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thomasvargiu /
php-openid-client
