I am currently working on setting up web push notifications using PHP. While I have researched the implementation of the web push protocol, such as reading about it here, I am struggling with understanding how to create the Authorization header as explained by the guide. To attempt this, I utilized this library along with VAPID keys generated from an online generator. My code snippet looks like:
use Lcobucci\JWT\Builder;
use Lcobucci\JWT\Signer\Key;
use Lcobucci\JWT\Signer\Ecdsa\Sha256;
$signer = new Sha256();
$privateKey = new Key('<the generated private VAPID key>');
$time = time();
$token = (new Builder())->permittedFor('https://example.com')
->expiresAt($time + 3600)
->withHeader('alg', 'ES256')
->withClaim('sub', 'mailto:<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="0a7965676f65646f4a6f726b677a666f24696567">[email protected]</a>')
->getToken($signer, $privateKey);
My goal is to obtain something similar to
<JWT Info>.<JWT Data>.<Signature>$token. However, I encountered an error.
Fatal error: Uncaught InvalidArgumentException: It was not possible to parse your key, reason: error:0909006C:PEM ...
If anyone has insight into what may be going wrong in my approach, I would greatly appreciate your assistance. Thank you in advance!