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<?php |
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declare(strict_types=1); |
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namespace TMV\OpenIdClient\Claims; |
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use function array_diff_key; |
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use function array_flip; |
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use function array_key_exists; |
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use function count; |
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use function explode; |
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use Jose\Component\Core\AlgorithmManager; |
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use Jose\Component\Signature\Algorithm\RS256; |
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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\JWSSerializer; |
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use function json_decode; |
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use function sprintf; |
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use function TMV\OpenIdClient\base64url_decode; |
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use TMV\OpenIdClient\Client\ClientInterface as OpenIDClient; |
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use TMV\OpenIdClient\Exception\InvalidArgumentException; |
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use TMV\OpenIdClient\Exception\RuntimeException; |
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use TMV\OpenIdClient\Issuer\IssuerFactory; |
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use TMV\OpenIdClient\Issuer\IssuerFactoryInterface; |
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abstract class AbstractClaims |
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{ |
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/** @var AlgorithmManager */ |
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protected $algorithmManager; |
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/** @var JWSVerifier */ |
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protected $JWSVerifier; |
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/** @var IssuerFactoryInterface */ |
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protected $issuerFactory; |
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/** @var JWSSerializer */ |
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protected $serializer; |
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public function __construct( |
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?AlgorithmManager $algorithmManager = null, |
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?JWSVerifier $JWSVerifier = null, |
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?IssuerFactoryInterface $issuerFactory = null, |
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?JWSSerializer $serializer = null |
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) { |
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$this->algorithmManager = $algorithmManager ?: new AlgorithmManager([new RS256()]); |
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$this->JWSVerifier = $JWSVerifier ?: new JWSVerifier($this->algorithmManager); |
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$this->issuerFactory = $issuerFactory ?: new IssuerFactory(); |
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$this->serializer = $serializer ?: new CompactSerializer(); |
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} |
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protected function claimJWT(OpenIDClient $client, string $jwt): array |
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{ |
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$issuer = $client->getIssuer(); |
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$header = json_decode(base64url_decode(explode('.', $jwt)[0] ?? '{}'), true); |
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$payload = json_decode(base64url_decode(explode('.', $jwt)[1] ?? '{}'), true); |
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/** @var null|string $alg */ |
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$alg = $header['alg'] ?? null; |
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/** @var null|string $kid */ |
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$kid = $header['kid'] ?? null; |
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if (null === $alg) { |
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throw new InvalidArgumentException('Claim source is missing JWT header alg property'); |
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} |
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if ('none' === $alg) { |
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return $payload; |
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} |
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/** @var null|string $iss */ |
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$iss = $payload['iss'] ?? null; |
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if (null === $iss || $iss === $issuer->getMetadata()->getIssuer()) { |
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$jwks = $issuer->getJwks(); |
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} else { |
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$discovered = $this->issuerFactory->fromUri($iss); |
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$jwks = $discovered->getJwks(); |
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} |
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$jws = $this->serializer->unserialize($jwt); |
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$jwk = $jwks->selectKey('sig', $this->algorithmManager->get($alg), null !== $kid ? ['kid' => $kid] : []); |
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if (null === $jwk) { |
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throw new RuntimeException('Unable to get a key to verify claim source JWT'); |
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} |
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if (false === $this->JWSVerifier->verifyWithKey($jws, $jwk, 0)) { |
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throw new InvalidArgumentException('Invalid claim source JWT signature'); |
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} |
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return $payload; |
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} |
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protected function assignClaims(array $claims, array $sourceNames, array $sources): array |
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{ |
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foreach ($sourceNames as $claim => $inSource) { |
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if (! array_key_exists($inSource, $sources)) { |
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continue; |
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} |
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if (! $sources[$inSource][$claim]) { |
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throw new RuntimeException(sprintf('Unable to find claim "%s" in source "%s"', $claim, $inSource)); |
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} |
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$claims[$claim] = $sources[$inSource][$claim]; |
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$claims['_claim_names'] = array_diff_key($claims['_claim_names'] ?? [], array_flip([$claim])); |
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} |
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return $claims; |
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} |
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protected function cleanClaims(array $claims): array |
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{ |
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if (array_key_exists('_claim_names', $claims) && 0 === count($claims['_claim_names'] ?? [])) { |
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$claims = array_diff_key($claims, array_flip(['_claim_names'])); |
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} |
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if (array_key_exists('_claim_sources', $claims) && 0 === count($claims['_claim_sources'] ?? [])) { |
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$claims = array_diff_key($claims, array_flip(['_claim_sources'])); |
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} |
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return $claims; |
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} |
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} |
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thomasvargiu /
php-openid-client
