| public static getVapidHeaders ( string $audience, string $subject, string $publicKey, string $privateKey, integer $expiration = null ) : array | ||
| $audience | string | This must be the origin of the push service |
| $subject | string | This should be a URL or a 'mailto:' email address |
| $publicKey | string | The decoded VAPID public key |
| $privateKey | string | The decoded VAPID private key |
| $expiration | integer | The expiration of the VAPID JWT. (UNIX timestamp) |
| return | array | Returns an array with the 'Authorization' and 'Crypto-Key' values to be used as headers |
public static function getVapidHeaders($audience, $subject, $publicKey, $privateKey, $expiration = null)
{
$expirationLimit = time() + 43200;
// equal margin of error between 0 and 24h
if (!isset($expiration) || $expiration > $expirationLimit) {
$expiration = $expirationLimit;
}
$header = array('typ' => 'JWT', 'alg' => 'ES256');
$jwtPayload = json_encode(array('aud' => $audience, 'exp' => $expiration, 'sub' => $subject), JSON_UNESCAPED_SLASHES | JSON_NUMERIC_CHECK);
$generator = EccFactory::getNistCurves()->generator256();
$privateKeyObject = $generator->getPrivateKeyFrom(gmp_init(bin2hex($privateKey), 16));
$pemSerialize = new PemPrivateKeySerializer(new DerPrivateKeySerializer());
$pem = $pemSerialize->serialize($privateKeyObject);
$jwk = JWKFactory::createFromKey($pem, null);
$jws = JWSFactory::createJWSToCompactJSON($jwtPayload, $jwk, $header);
return array('Authorization' => 'WebPush ' . $jws, 'Crypto-Key' => 'p256ecdsa=' . Base64Url::encode($publicKey));
} /**
* @dataProvider vapidProvider
*
* @param $audience
* @param $vapid
* @param $expiration
* @param $expectedAuthorization
* @param $expectedCryptoKey
*/
public function testGetVapidHeaders($audience, $vapid, $expiration, $expectedAuthorization, $expectedCryptoKey)
{
$vapid = VAPID::validate($vapid);
$headers = VAPID::getVapidHeaders($audience, $vapid['subject'], $vapid['publicKey'], $vapid['privateKey'], $expiration);
$this->assertArrayHasKey('Authorization', $headers);
$this->assertEquals(Utils::safeStrlen($expectedAuthorization), Utils::safeStrlen($headers['Authorization']));
$this->assertEquals($this->explodeAuthorization($expectedAuthorization), $this->explodeAuthorization($headers['Authorization']));
$this->assertArrayHasKey('Crypto-Key', $headers);
$this->assertEquals($expectedCryptoKey, $headers['Crypto-Key']);
}