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<?php |
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declare(strict_types=1); |
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namespace TMV\OpenIdClient\Token; |
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use Jose\Component\Checker\AudienceChecker; |
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use Jose\Component\Checker\ClaimCheckerManager; |
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use Jose\Component\Checker\ExpirationTimeChecker; |
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use Jose\Component\Checker\IssuedAtChecker; |
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use Jose\Component\Checker\IssuerChecker; |
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use Jose\Component\Checker\NotBeforeChecker; |
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use Jose\Component\Core\AlgorithmManager; |
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use Jose\Component\Core\JWKSet; |
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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 function TMV\OpenIdClient\base64url_decode; |
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use TMV\OpenIdClient\ClaimChecker\AzpChecker; |
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use TMV\OpenIdClient\ClientInterface; |
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use TMV\OpenIdClient\Exception\InvalidArgumentException; |
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use TMV\OpenIdClient\Exception\RuntimeException; |
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use function TMV\OpenIdClient\jose_secret_key; |
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class ResponseTokenVerifier implements ResponseTokenVerifierInterface |
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{ |
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/** @var AlgorithmManager */ |
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private $algorithmManager; |
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/** @var bool */ |
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private $aadIssValidation; |
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/** @var int */ |
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private $clockTolerance; |
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/** |
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* IdTokenVerifier constructor. |
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* |
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* @param null|AlgorithmManager $algorithmManager |
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* @param bool $aadIssValidation |
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* @param int $clockTolerance |
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*/ |
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public function __construct( |
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?AlgorithmManager $algorithmManager = null, |
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bool $aadIssValidation = false, |
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int $clockTolerance = 0 |
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) { |
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$this->algorithmManager = $algorithmManager ?: new AlgorithmManager([new RS256()]); |
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$this->aadIssValidation = $aadIssValidation; |
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$this->clockTolerance = $clockTolerance; |
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} |
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public function validate(ClientInterface $client, string $token): array |
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{ |
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$metadata = $client->getMetadata(); |
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$expectedAlg = $metadata->getAuthorizationSignedResponseAlg(); |
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if (! $expectedAlg) { |
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throw new RuntimeException('No authorization_signed_response_alg defined'); |
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} |
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$header = \json_decode(base64url_decode(\explode('.', $token)[0] ?? '{}'), true); |
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if ($expectedAlg !== ($header['alg'] ?? '')) { |
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throw new RuntimeException(\sprintf('Unexpected JWE alg received, expected %s, got: %s', $expectedAlg, $header['alg'] ?? '')); |
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} |
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$payload = \json_decode(base64url_decode(\explode('.', $token)[1] ?? '{}'), true); |
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if (! \is_array($payload)) { |
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throw new InvalidArgumentException('Unable to decode token payload'); |
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} |
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$expectedIssuer = $client->getIssuer()->getMetadata()->getIssuer(); |
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if ($this->aadIssValidation) { |
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$expectedIssuer = \str_replace('{tenantid}', $payload['tid'] ?? '', $expectedIssuer); |
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} |
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$claimCheckers = [ |
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new IssuerChecker([$expectedIssuer]), |
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new IssuedAtChecker($this->clockTolerance), |
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new AudienceChecker($metadata->getClientId()), |
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new ExpirationTimeChecker($this->clockTolerance), |
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new NotBeforeChecker($this->clockTolerance), |
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new AzpChecker($metadata->getClientId()), |
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]; |
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$requiredClaims = ['iss', 'sub', 'aud', 'exp', 'iat']; |
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$claimCheckerManager = new ClaimCheckerManager(\array_filter($claimCheckers)); |
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$claimCheckerManager->check($payload, \array_filter($requiredClaims)); |
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$serializer = new CompactSerializer(); |
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$jws = $serializer->unserialize($token); |
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$jwsVerifier = new JWSVerifier( |
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$this->algorithmManager |
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); |
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if (0 === \strpos($expectedAlg, 'HS')) { |
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$clientSecret = $metadata->getClientSecret(); |
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if (! $clientSecret) { |
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throw new RuntimeException('Unable to verify token without client_secret'); |
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} |
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$jwks = new JWKSet([jose_secret_key($clientSecret)]); |
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} else { |
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$jwks = $client->getIssuer()->getJwks(); |
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} |
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if (! $jwsVerifier->verifyWithKeySet($jws, $jwks, 0)) { |
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throw new InvalidArgumentException('Failed to validate JWT signature'); |
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} |
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return $payload; |
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} |
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} |
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thomasvargiu /
php-openid-client
