Viewing file:  EventWebhook.php (1.46 KB) -rw-rw-r--
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<?php
namespace SendGrid\EventWebhook;
use EllipticCurve\Ecdsa;
use EllipticCurve\PublicKey;
use EllipticCurve\Signature;
/**
* This class allows you to use the Event Webhook feature. Read the docs for
* more details: https://sendgrid.com/docs/for-developers/tracking-events/event
*
* @package SendGrid\EventWebhook
*/
class EventWebhook
{
/**
* Convert the public key string to a ECPublicKey.
*
* @param string $publicKey verification key under Mail Settings
* @return PublicKey public key using the ECDSA algorithm
*/
public function convertPublicKeyToECDSA($publicKey)
{
return PublicKey::fromString($publicKey);
}
/**
* Verify signed event webhook requests.
*
* @param PublicKey $publicKey elliptic curve public key
* @param string $payload event payload in the request body
* @param string $signature value obtained from the
* 'X-Twilio-Email-Event-Webhook-Signature' header
* @param string $timestamp value obtained from the
* 'X-Twilio-Email-Event-Webhook-Timestamp' header
* @return bool true or false if signature is valid
*/
public function verifySignature($publicKey, $payload, $signature, $timestamp)
{
$timestampedPayload = $timestamp . $payload;
$decodedSignature = Signature::fromBase64($signature);
return Ecdsa::verify($timestampedPayload, $decodedSignature, $publicKey);
}
}
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