5-encoder-service.rst

JWT encoder service customization

This bundle comes with a built-in token encoder, based on the lcobucci/jwt library. If he doesn't suit your needs, you can replace it with your own encoder service. Here's an example implementing a nixilla/php-jwt library based encoder.

Creating your own encoder

Create the encoder class

// src/App/Encoder/NixillaJWTEncoder.php
namespace App\Encoder;

use JWT\Authentication\JWT;
use Lexik\Bundle\JWTAuthenticationBundle\Encoder\JWTEncoderInterface;
use Lexik\Bundle\JWTAuthenticationBundle\Exception\JWTEncodeFailureException;
use Lexik\Bundle\JWTAuthenticationBundle\Exception\JWTDecodeFailureException;

/**
 * NixillaJWTEncoder
 *
 * @author Nicolas Cabot <n.cabot@lexik.fr>
 */
class NixillaJWTEncoder implements JWTEncoderInterface
{
    private $key;

    public function __construct(string $key = 'super_secret_key')
    {
        $this->key = $key;
    }

    /**
     * {@inheritdoc}
     */
    public function encode(array $data)
    {
        try {
            return JWT::encode($data, $this->key);
        }
        catch (\Exception $e) {
            throw new JWTEncodeFailureException(JWTEncodeFailureException::INVALID_CONFIG, 'An error occurred while trying to encode the JWT token.', $e);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function decode($token)
    {
        try {
            return (array) JWT::decode($token, $this->key);
        } catch (\Exception $e) {
            throw new JWTDecodeFailureException(JWTDecodeFailureException::INVALID_TOKEN, 'Invalid JWT Token', $e);
        }
    }
}

Use it as encoder service

# config/packages/lexik_jwt_authentication.yaml
lexik_jwt_authentication:
    # ...
    encoder:
        service: App\Encoder\NixillaJWTEncoder

Note

You can use the lexik_jwt_authentication.encoder.signature_algorithm parameter that represents the corresponding configuration option by injecting this as argument of the encoder's service.

See the configuration reference <1-configuration-reference> for more information.