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<?php
/**
* Vonage Client Library for PHP
*
* @copyright Copyright (c) 2016-2022 Vonage, Inc. (http://vonage.com)
* @license https://github.com/Vonage/vonage-php-sdk-core/blob/master/LICENSE.txt Apache License 2.0
*/
declare(strict_types=1);
namespace Vonage\Client\Credentials;
use Lcobucci\JWT\Configuration;
use Lcobucci\JWT\Signer\Key;
use Lcobucci\JWT\Signer\Key\InMemory;
use Lcobucci\JWT\Signer\Rsa\Sha256;
use Lcobucci\JWT\Token;
use Vonage\Application\Application;
use function base64_encode;
use function mt_rand;
use function time;
/**
* @property mixed application
*/
class Keypair extends AbstractCredentials
{
/**
* @var Key
*/
protected $key;
public function __construct($privateKey, $application = null)
{
$this->credentials['key'] = $privateKey;
if ($application) {
if ($application instanceof Application) {
$application = $application->getId();
}
$this->credentials['application'] = $application;
}
$this->key = InMemory::plainText($privateKey);
}
/**
* @return Key
*/
public function getKey(): Key
{
return $this->key;
}
public function generateJwt(array $claims = []): Token
{
$config = Configuration::forSymmetricSigner(new Sha256(), $this->key);
$exp = time() + 60;
$iat = time();
$jti = base64_encode((string)mt_rand());
if (isset($claims['exp'])) {
$exp = $claims['exp'];
unset($claims['exp']);
}
if (isset($claims['iat'])) {
$iat = $claims['iat'];
unset($claims['iat']);
}
if (isset($claims['jti'])) {
$jti = $claims['jti'];
unset($claims['jti']);
}
$builder = $config->builder();
$builder->issuedAt((new \DateTimeImmutable())->setTimestamp($iat))
->expiresAt((new \DateTimeImmutable())->setTimestamp($exp))
->identifiedBy($jti);
if (isset($claims['nbf'])) {
$builder->canOnlyBeUsedAfter((new \DateTimeImmutable())->setTimestamp($claims['nbf']));
unset($claims['nbf']);
}
if (isset($this->credentials['application'])) {
$builder->withClaim('application_id', $this->credentials['application']);
}
if (isset($claims['sub'])) {
$builder->relatedTo($claims['sub']);
unset($claims['sub']);
}
if (!empty($claims)) {
foreach ($claims as $claim => $value) {
$builder->withClaim($claim, $value);
}
}
return $builder->getToken($config->signer(), $config->signingKey());
}
}