/// <summary>
/// Encrypts the stream under current security conditions.
/// </summary>
/// <param name="messageStream">Data to be encrypted.</param>
/// <param name="outputStream">Stream to write encrypted content to.</param>
/// <param name="sspiFeatureFlags">Requested features.</param>
public void EncryptMessage(Stream messageStream, GenuineChunkedStream outputStream, SspiFeatureFlags sspiFeatureFlags)
{
// get package sizes
lock (_secPkgContext_SizesLock)
{
if (!_secPkgContext_SizesInitialized)
{
SspiApi.QueryContextSizes(this._phContext, ref this._secPkgContext_Sizes);
_secPkgContext_SizesInitialized = true;
}
}
byte[] chunk = null;
int position = 0;
BinaryWriter outputWriter = new BinaryWriter(outputStream);
if ((sspiFeatureFlags & SspiFeatureFlags.Encryption) != 0)
{
// it'll write signature automatically as well as encrypt content
SspiApi.EncryptMessage(this._phContext, messageStream, outputWriter, ref this._secPkgContext_Sizes);
}
else if ((sspiFeatureFlags & SspiFeatureFlags.Signing) != 0)
{
// remember position to write signature size later
outputStream.WriteInt32AndRememberItsLocation(0, out chunk, out position);
long currentLength = outputStream.Length;
// anyway will have to read this into buffer
byte[] contentBuffer = new byte[(int)messageStream.Length];
GenuineUtility.ReadDataFromStream(messageStream, contentBuffer, 0, contentBuffer.Length);
// write signature
SspiApi.MakeSignature(this._phContext, contentBuffer, outputWriter, ref this._secPkgContext_Sizes);
// update signature size
MessageCoder.WriteInt32(chunk, position, (int)(outputStream.Length - currentLength));
// write the content
outputWriter.Write((int)contentBuffer.Length);
outputWriter.Write(contentBuffer, 0, contentBuffer.Length);
}
else
{
// just copy the source content
//outputWriter.Write( (int) messageStream.Length );
GenuineUtility.CopyStreamToStream(messageStream, outputStream);
}
}
/// <summary>
/// Sends the message to the remote host.
/// </summary>
/// <param name="message">The message to be sent.</param>
protected override void InternalSend(Message message)
{
BinaryLogWriter binaryLogWriter = this.ITransportContext.BinaryLogWriter;
// get IP end point of the remote host
IPEndPoint remoteEndPoint;
if (message.Recipient.Uri != null && message.Recipient.Uri.StartsWith("_gb"))
{
remoteEndPoint = this._multicastTo;
}
else
{
remoteEndPoint = message.Recipient.PhysicalAddress as IPEndPoint;
}
if (remoteEndPoint == null)
{
try
{
int port;
string baseUrl = GenuineUtility.SplitToHostAndPort(message.Recipient.Url, out port);
message.Recipient.PhysicalAddress = remoteEndPoint = new IPEndPoint(GenuineUtility.ResolveIPAddress(baseUrl), port);
}
catch (Exception)
{
throw GenuineExceptions.Get_Send_DestinationIsUnreachable(message.Recipient.ToString());
}
}
Stream streamToSend = message.SerializedContent;
// write the host URI
if ((int)this.ITransportContext.IParameterProvider[GenuineParameter.CompatibilityLevel] > 0)
{
GenuineChunkedStream streamWith250Header = new GenuineChunkedStream(false);
BinaryWriter binaryWriter = new BinaryWriter(streamWith250Header);
streamWith250Header.Write(this.ITransportContext.BinaryHostIdentifier, 0, this.ITransportContext.BinaryHostIdentifier.Length);
binaryWriter.Write((int)message.Recipient.LocalHostUniqueIdentifier);
binaryWriter.Write((Int16)0);
streamWith250Header.WriteStream(streamToSend);
streamToSend = streamWith250Header;
}
// LOG:
if (binaryLogWriter != null && binaryLogWriter[LogCategory.Connection] > 0)
{
binaryLogWriter.WriteEvent(LogCategory.Connection, "UdpConnectionManager.InternalSend",
LogMessageType.MessageIsSentSynchronously, null, message, message.Recipient, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
message.ConnectionLevelSecuritySession, message.ConnectionLevelSecuritySession == null ? null : message.ConnectionLevelSecuritySession.Name,
-1, 0, 0, 0, remoteEndPoint.ToString(), null, null, null,
"The message is being sent synchronously to {0}.", remoteEndPoint.ToString());
}
// send the message
byte[] streamId = Guid.NewGuid().ToByteArray();
lock (_socketLock)
{
for (int chunkNumber = 1; ; chunkNumber++)
{
// read the next chunk
int chunkSize = streamToSend.Read(this._sendBuffer, HEADER_SIZE, this._sendBuffer.Length - HEADER_SIZE);
// fill in the header
this._sendBuffer[0] = MessageCoder.COMMAND_MAGIC_CODE;
Buffer.BlockCopy(streamId, 0, this._sendBuffer, 1, 16);
if (chunkSize < this._sendBuffer.Length - HEADER_SIZE)
{
chunkNumber = -chunkNumber;
}
MessageCoder.WriteInt32(this._sendBuffer, 17, chunkNumber);
// and just send it!
// LOG:
if (binaryLogWriter != null && binaryLogWriter[LogCategory.Transport] > 0)
{
binaryLogWriter.WriteTransportContentEvent(LogCategory.Transport, "UdpConnectionManager.InternalSend",
LogMessageType.SynchronousSendingStarted, null, message, message.Recipient,
binaryLogWriter[LogCategory.Transport] > 1 ? new MemoryStream(GenuineUtility.CutOutBuffer(this._sendBuffer, 0, chunkSize + HEADER_SIZE)) : null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name,
this.DbgConnectionId, chunkSize + HEADER_SIZE, remoteEndPoint.ToString(),
null, null,
"Content is sent synchronously to {0}.", remoteEndPoint.ToString());
}
this._socket.SendTo(this._sendBuffer, 0, chunkSize + HEADER_SIZE, SocketFlags.None, remoteEndPoint);
if (chunkNumber < 0)
{
break;
}
}
}
}