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<?php |
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namespace Emarref\Jwt\Verification; |
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use Emarref\Jwt\Encoding; |
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use Emarref\Jwt\Encryption; |
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use Emarref\Jwt\Exception\InvalidSignatureException; |
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use Emarref\Jwt\HeaderParameter; |
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use Emarref\Jwt\Signature; |
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use Emarref\Jwt\Token; |
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class EncryptionVerifier implements VerifierInterface |
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{ |
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/** |
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* @var Encryption\EncryptionInterface |
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*/ |
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private $encryption; |
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/** |
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* @var Encoding\EncoderInterface |
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*/ |
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private $encoder; |
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/** |
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* @var Signature\Jws |
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*/ |
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protected $signer; |
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/** |
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* @param Encryption\EncryptionInterface $encryption |
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* @param Encoding\EncoderInterface $encoder |
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*/ |
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public function __construct(Encryption\EncryptionInterface $encryption, Encoding\EncoderInterface $encoder) |
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{ |
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$this->encryption = $encryption; |
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$this->encoder = $encoder; |
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$this->signer = new Signature\Jws($this->encryption, $this->encoder); |
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} |
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/** |
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* @param Token $token |
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* @throws InvalidSignatureException |
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*/ |
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public function verify(Token $token) |
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{ |
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/** @var HeaderParameter\Algorithm $algorithmParameter */ |
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$algorithmParameter = $token->getHeader()->findParameterByName(HeaderParameter\Algorithm::NAME); |
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if (null === $algorithmParameter) { |
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throw new \RuntimeException('Algorithm parameter not found in token header.'); |
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} |
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if ($algorithmParameter->getValue() !== $this->encryption->getAlgorithmName()) { |
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throw new \RuntimeException(sprintf( |
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'Cannot use "%s" algorithm to decrypt token encrypted with algorithm "%s".', |
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$this->encryption->getAlgorithmName(), |
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$algorithmParameter->getValue() |
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)); |
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} |
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if (!$this->encryption->verify($this->signer->getUnsignedValue($token), $token->getSignature())) { |
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throw new InvalidSignatureException; |
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} |
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} |
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} |
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emarref /
jwt
