<?php
/**
 * @author      Alex Bilbie <hello@alexbilbie.com>
 * @copyright   Copyright (c) Alex Bilbie
 * @license     http://mit-license.org/
 *
 * @link        https://github.com/thephpleague/oauth2-server
 */

namespace League\OAuth2\Server\AuthorizationValidators;

use DateTimeZone;
use Lcobucci\Clock\SystemClock;
use Lcobucci\JWT\Configuration;
use Lcobucci\JWT\Signer\Key\InMemory;
use Lcobucci\JWT\Signer\Rsa\Sha256;
use Lcobucci\JWT\Validation\Constraint\LooseValidAt;
use Lcobucci\JWT\Validation\Constraint\SignedWith;
use Lcobucci\JWT\Validation\Constraint\ValidAt;
use Lcobucci\JWT\Validation\RequiredConstraintsViolated;
use League\OAuth2\Server\CryptKey;
use League\OAuth2\Server\CryptTrait;
use League\OAuth2\Server\Exception\OAuthServerException;
use League\OAuth2\Server\Repositories\AccessTokenRepositoryInterface;
use Psr\Http\Message\ServerRequestInterface;

class BearerTokenValidator implements AuthorizationValidatorInterface
{
    use CryptTrait;

    /**
     * @var AccessTokenRepositoryInterface
     */
    private $accessTokenRepository;

    /**
     * @var CryptKey
     */
    protected $publicKey;

    /**
     * @var Configuration
     */
    private $jwtConfiguration;

    /**
     * @var \DateInterval|null
     */
    private $jwtValidAtDateLeeway;

    /**
     * @param AccessTokenRepositoryInterface $accessTokenRepository
     * @param \DateInterval|null             $jwtValidAtDateLeeway
     */
    public function __construct(AccessTokenRepositoryInterface $accessTokenRepository, \DateInterval $jwtValidAtDateLeeway = null)
    {
        $this->accessTokenRepository = $accessTokenRepository;
        $this->jwtValidAtDateLeeway = $jwtValidAtDateLeeway;
    }

    /**
     * Set the public key
     *
     * @param CryptKey $key
     */
    public function setPublicKey(CryptKey $key)
    {
        $this->publicKey = $key;

        $this->initJwtConfiguration();
    }

    /**
     * Initialise the JWT configuration.
     */
    private function initJwtConfiguration()
    {
        $this->jwtConfiguration = Configuration::forSymmetricSigner(
            new Sha256(),
            InMemory::plainText('empty', 'empty')
        );

        $clock = new SystemClock(new DateTimeZone(\date_default_timezone_get()));
        $this->jwtConfiguration->setValidationConstraints(
            \class_exists(LooseValidAt::class)
                ? new LooseValidAt($clock, $this->jwtValidAtDateLeeway)
                : new ValidAt($clock, $this->jwtValidAtDateLeeway),
            new SignedWith(
                new Sha256(),
                InMemory::plainText($this->publicKey->getKeyContents(), $this->publicKey->getPassPhrase() ?? '')
            )
        );
    }

    /**
     * {@inheritdoc}
     */
    public function validateAuthorization(ServerRequestInterface $request)
    {
        if ($request->hasHeader('authorization') === false) {
            throw OAuthServerException::accessDenied('Missing "Authorization" header');
        }

        $header = $request->getHeader('authorization');
        $jwt = \trim((string) \preg_replace('/^\s*Bearer\s/', '', $header[0]));

        try {
            // Attempt to parse the JWT
            $token = $this->jwtConfiguration->parser()->parse($jwt);
        } catch (\Lcobucci\JWT\Exception $exception) {
            throw OAuthServerException::accessDenied($exception->getMessage(), null, $exception);
        }

        try {
            // Attempt to validate the JWT
            $constraints = $this->jwtConfiguration->validationConstraints();
            $this->jwtConfiguration->validator()->assert($token, ...$constraints);
        } catch (RequiredConstraintsViolated $exception) {
            throw OAuthServerException::accessDenied('Access token could not be verified');
        }

        $claims = $token->claims();

        // Check if token has been revoked
        if ($this->accessTokenRepository->isAccessTokenRevoked($claims->get('jti'))) {
            throw OAuthServerException::accessDenied('Access token has been revoked');
        }

        // Return the request with additional attributes
        return $request
            ->withAttribute('oauth_access_token_id', $claims->get('jti'))
            ->withAttribute('oauth_client_id', $this->convertSingleRecordAudToString($claims->get('aud')))
            ->withAttribute('oauth_user_id', $claims->get('sub'))
            ->withAttribute('oauth_scopes', $claims->get('scopes'));
    }

    /**
     * Convert single record arrays into strings to ensure backwards compatibility between v4 and v3.x of lcobucci/jwt
     *
     * @param mixed $aud
     *
     * @return array|string
     */
    private function convertSingleRecordAudToString($aud)
    {
        return \is_array($aud) && \count($aud) === 1 ? $aud[0] : $aud;
    }
}

• [F] AuthorizationValidatorInterface.php
  Delete
• [F] BearerTokenValidator.php
  Delete

Service Section

Our Services: Streamlining Your Payment Experience with Excellence

Discover how our services are designed to enhance your NFC Pay experience with convenience, security, and innovative solutions. From managing transactions to secure payments, we are dedicated to providing seamless support every step of the way.

Secure Card Storage

Easily save your credit and debit card details within our app for quick and secure transactions. This feature ensures that your payment information is protected with advanced encryption and can be used for future purchases with just a tap.

Effortless Money Transfers

Transfer funds quickly and securely between users with our streamlined money transfer service. Simply select the recipient, enter the amount, and authorize the transaction for instant, hassle-free transfers.

Merchant Account Setup

Activate your merchant account effortlessly to start receiving payments. Our intuitive setup process ensures that you can begin accepting transactions smoothly, helping your business thrive with minimal setup time.

Real-Time Transaction Tracking

Keep track of all your transactions in real time through our app. Monitor payment statuses, view transaction history, and manage your account efficiently, ensuring complete control over your financial activities.

Customer Support

Our dedicated support team is available to assist you with any queries or issues. Whether you need help with setting up your account or resolving transaction-related questions, we’re here to provide prompt and reliable assistance.