public function uploadPartSecurely($args = array())
{
$uploadId = $args["Options"]["uploadId"];
$isLastPart = FALSE;
$blocksize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
if (isset($args["LastPart"])) {
$isLastPart = $args["LastPart"];
}
$exists = EncryptionUtil::multipartUploadContextExists($uploadId);
if (!$exists) {
throw new Ks3ClientException("no such upload in cache/encryption/");
}
$context = EncryptionUtil::getMultipartUploadContext($uploadId);
if ($context["lastPart"]) {
throw new Ks3ClientException("this upload with uploadId " . $uploadId, " has been upload last part");
}
$plainTextLength = EncryptionUtil::plainTextLength($args);
if ($plainTextLength <= 0) {
throw new Ks3ClientException("get content length failed ,unexpected content length " . $plainTextLength);
}
if (!$isLastPart) {
if ($plainTextLength % $blocksize != 0) {
throw new Ks3ClientException("Invalid part size,part size (" . $plainTextLength . ") must be multiples of the block size " . $blocksize);
}
} else {
$args["ObjectMeta"]["Content-Length"] = $plainTextLength + ($blocksize - $plainTextLength % $blocksize);
}
$readCallBack = new AESCBCStreamReadCallBack();
$readCallBack->iv = base64_decode($context["nextIv"]);
$readCallBack->cek = base64_decode($context["cek"]);
$readCallBack->contentLength = $plainTextLength;
$readCallBack->mutipartUpload = TRUE;
$readCallBack->isLastPart = $isLastPart;
$args["readCallBack"] = $readCallBack;
$upResult = $this->ks3client->uploadPart($args);
EncryptionUtil::updateMultipartUploadContext($uploadId, $readCallBack->iv, $isLastPart);
return $upResult;
}