<?php
declare(strict_types=1);
namespace ParagonIE\Halite\Symmetric;
use \ParagonIE\Halite\Alerts\InvalidKey;
use \ParagonIE\Halite\Util as CryptoUtil;
final class AuthenticationKey extends SecretKey
{
/**
* @param string $keyMaterial - The actual key data
*/
public function __construct(string $keyMaterial = '', ...$args)
{
if (CryptoUtil::safeStrlen($keyMaterial) !== \Sodium\CRYPTO_AUTH_KEYBYTES) {
throw new InvalidKey(
'Authentication key must be CRYPTO_AUTH_KEYBYTES bytes long'
);
}
parent::__construct($keyMaterial, true);
}
}
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