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<?php
namespace Studip\LTI13a;
use OAT\Library\Lti1p3Core\Security\Nonce\NonceGeneratorInterface;
use OAT\Library\Lti1p3Core\Security\Nonce\NonceInterface;
use OAT\Library\Lti1p3Core\Security\Nonce\Nonce;
class NonceGenerator implements NonceGeneratorInterface
{
public function __construct(
protected bool $pass_nonce_from_request = false
) {
}
#[\Override]
public function generate(?int $ttl = null): NonceInterface
{
$expiration = new \DateTime();
$expiration = $expiration->add(new \DateInterval('PT5M'));
if ($this->pass_nonce_from_request) {
return new Nonce(
\Request::get('nonce'),
$expiration
);
} else {
$nonce = md5(random_bytes(16) . 'lti13a_nonce');
return new Nonce(
$nonce,
$expiration
);
}
}
}
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