public function initMultipartUploadSecurely($args = array())
{
$sek = EncryptionUtil::genereateOnceUsedKey();
$encryptedSek = EncryptionUtil::encodeCek($this->encryptionMaterials, $sek);
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
$matdesc = "{}";
if (ENCRYPTPTION_STORAGE_MODE == "ObjectMetadata") {
$args["UserMeta"]["x-kss-meta-x-kss-key"] = base64_encode($encryptedSek);
$args["UserMeta"]["x-kss-meta-x-kss-iv"] = base64_encode($iv);
$args["UserMeta"]["x-kss-meta-x-kss-matdesc"] = $matdesc;
}
$initResult = $this->ks3client->initMultipartUpload($args);
EncryptionUtil::initMultipartUploadContext($initResult, $iv, $sek, $encryptedSek, $matdesc);
return $initResult;
}
