*/
namespace Friendica\Util;
-use Friendica\BaseObject;
use Friendica\Core\Config;
use Friendica\Core\Logger;
-use Friendica\Database\DBA;
use Friendica\Model\User;
use Friendica\Model\APContact;
-use Friendica\Protocol\ActivityPub;
-use Friendica\Util\DateTimeFormat;
/**
* @brief Implements HTTP Signatures per draft-cavage-http-signatures-07.