private void ReciveNewFile(Message message)
{
var fields = message.StringMessage.Split('$');
if (fields.Length < 3)
{
SendResult(false, "Параметры неверны");
}
var transferId = fields[0];
var rsaParamKey = fields[1];
var newFileKey = fields[2];
var transferParams = _dbController.GetTransferParams(transferId);
if (transferParams == null)
{
SendResult(false, "Файл не найден");
return;
}
SHA1 hash = SHA1.Create();
var rsaParamsKeyHash = ByteToStringConverter(hash.ComputeHash(StringToByteConverter(rsaParamKey)));
var rsaFilePath = _dbController.GetPrivateKeyPath(_userId, rsaParamsKeyHash);
if (rsaFilePath == null)
{
SendResult(false, "Неверный ключ обмена");
return;
}
CryptoController crypto = new CryptoController();
var oldFileKeyBytes = crypto.DecryptDataWithRsaFile(rsaFilePath, rsaParamKey,
StringToByteConverter(transferParams[2]));
if (oldFileKeyBytes == null)
{
SendResult(false, "Ошибка извлечения ключа файла");
return;
}
var oldFileKey = ByteToStringConverter(oldFileKeyBytes);
crypto.ChangeEncryptKey(transferParams[0], oldFileKey, newFileKey);
string fileHash;
string fileLength;
using (FileStream fs = new FileStream(transferParams[0], FileMode.Open))
{
fileHash = ByteToStringConverter(hash.ComputeHash(fs));
fileLength = fs.Length.ToString();
}
var newFileHash = ByteToStringConverter(hash.ComputeHash(StringToByteConverter(newFileKey)));
_dbController.SaveNewPrivateFile(transferParams[1], transferParams[0],
fileLength, fileHash, true, newFileHash);
_dbController.UpdateTransferStatus(transferId);
SendResult(true);
}
