public override void Send(Stream stream, TimeSpan timeout, Information options)
{
if (_disposed) throw new ObjectDisposedException(this.GetType().FullName);
if (stream == null) throw new ArgumentNullException("stream");
if (stream.Length == 0) throw new ArgumentOutOfRangeException("stream");
if (!_connect) throw new ConnectionException();
lock (_sendLock)
{
try
{
using (RangeStream targetStream = new RangeStream(stream, stream.Position, stream.Length - stream.Position, true))
{
if (_version.HasFlag(SecureConnectionVersion.Version3))
{
using (BufferStream bufferStream = new BufferStream(_bufferManager))
{
bufferStream.SetLength(8);
bufferStream.Seek(8, SeekOrigin.Begin);
if (_informationVersion3.CryptoAlgorithm.HasFlag(SecureVersion3.CryptoAlgorithm.Aes256))
{
byte[] iv = new byte[16];
_random.GetBytes(iv);
bufferStream.Write(iv, 0, iv.Length);
using (var aes = Aes.Create())
{
aes.KeySize = 256;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
using (CryptoStream cs = new CryptoStream(new WrapperStream(bufferStream, true), aes.CreateEncryptor(_informationVersion3.MyCryptoKey, iv), CryptoStreamMode.Write))
{
byte[] sendBuffer = null;
try
{
sendBuffer = _bufferManager.TakeBuffer(1024 * 4);
int i = -1;
while ((i = targetStream.Read(sendBuffer, 0, sendBuffer.Length)) > 0)
{
cs.Write(sendBuffer, 0, i);
}
}
finally
{
if (sendBuffer != null)
{
_bufferManager.ReturnBuffer(sendBuffer);
}
}
}
}
}
else
{
throw new ConnectionException();
}
_totalSendSize += (bufferStream.Length - 8);
bufferStream.Seek(0, SeekOrigin.Begin);
byte[] totalSendSizeBuff = NetworkConverter.GetBytes(_totalSendSize);
bufferStream.Write(totalSendSizeBuff, 0, totalSendSizeBuff.Length);
if (_informationVersion3.HashAlgorithm.HasFlag(SecureVersion3.HashAlgorithm.Sha256))
{
bufferStream.Seek(0, SeekOrigin.Begin);
byte[] hmacBuff = HmacSha256.ComputeHash(bufferStream, _informationVersion3.MyHmacKey);
bufferStream.Seek(0, SeekOrigin.End);
bufferStream.Write(hmacBuff, 0, hmacBuff.Length);
}
else
{
throw new ConnectionException();
}
bufferStream.Seek(0, SeekOrigin.Begin);
_connection.Send(bufferStream, timeout, options);
}
}
else
{
throw new ConnectionException();
}
}
}
catch (ConnectionException e)
{
throw e;
}
catch (Exception e)
{
throw new ConnectionException(e.Message, e);
}
}
}
private static Stream AddType(Stream stream, string type)
{
if (stream == null) throw new ArgumentNullException("stream");
List<Stream> streams = new List<Stream>();
Encoding encoding = new UTF8Encoding(false);
// Type
if (type != null)
{
BufferStream bufferStream = new BufferStream(_bufferManager);
bufferStream.SetLength(4);
bufferStream.Seek(4, SeekOrigin.Begin);
using (WrapperStream wrapperStream = new WrapperStream(bufferStream, true))
using (StreamWriter writer = new StreamWriter(wrapperStream, encoding))
{
writer.Write(type);
}
bufferStream.Seek(0, SeekOrigin.Begin);
bufferStream.Write(NetworkConverter.GetBytes((int)bufferStream.Length - 4), 0, 4);
streams.Add(bufferStream);
}
streams.Add(new WrapperStream(stream, true));
return new UniteStream(streams);
}
