League\OAuth2\Server\AuthorizationValidators\BearerTokenValidator

Complexity

Total Complexity

11

Size/Duplication

Total Lines	104
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	2
Bugs	0	Features	0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	setPublicKey()	0	5	1
A	initJwtConfiguration()	0	10	1
A	__construct()	0	3	1
A	validateAuthorization()	0	37	5
A	convertSingleRecordAudToString()	0	3	3

<?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\Encoding\CannotDecodeContent;
use Lcobucci\JWT\Signer\Key\InMemory;
use Lcobucci\JWT\Signer\Key\LocalFileReference;
use Lcobucci\JWT\Signer\Rsa\Sha256;
use Lcobucci\JWT\Token\InvalidTokenStructure;
use Lcobucci\JWT\Token\UnsupportedHeaderFound;
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;

    /**
     * @param AccessTokenRepositoryInterface $accessTokenRepository
     */
    public function __construct(AccessTokenRepositoryInterface $accessTokenRepository)
    {
        $this->accessTokenRepository = $accessTokenRepository;
    }

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

        $this->initJwtConfiguration();
    }

    private function initJwtConfiguration()
    {
        $this->jwtConfiguration = Configuration::forSymmetricSigner(
            new Sha256(),
            InMemory::plainText('')
        );

        $this->jwtConfiguration->setValidationConstraints(
            new ValidAt(new SystemClock(new DateTimeZone(\date_default_timezone_get()))),
            new SignedWith(new Sha256(), LocalFileReference::file($this->publicKey->getKeyPath()))
        );
    }

    /**
     * {@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 and validate the JWT
            $token = $this->jwtConfiguration->parser()->parse($jwt);

            $constraints = $this->jwtConfiguration->validationConstraints();

            try {
                $this->jwtConfiguration->validator()->assert($token, ...$constraints);
            } catch (RequiredConstraintsViolated $exception) {
                throw OAuthServerException::accessDenied('Access token could not be verified');
            }
        } catch (CannotDecodeContent | InvalidTokenStructure | UnsupportedHeaderFound $exception) {
            throw OAuthServerException::accessDenied($exception->getMessage(), null, $exception);
        }

        $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 $aud
     *
     * @return array|string
     */
    private function convertSingleRecordAudToString($aud)
    {
        return \is_countable($aud) && \count($aud) === 1 ? $aud[0] : $aud;
    }
}