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); }