private void InitializeProxySendCallback(IAsyncResult ar)
{
if (!Disposed)
{
BaseSocketConnection connection = null;
MessageBuffer writeMessage = null;
CallbackData callbackData = null;
try
{
callbackData = (CallbackData)ar.AsyncState;
connection = callbackData.Connection;
writeMessage = callbackData.Buffer;
if (connection.Active)
{
//----- Socket!
int writeBytes = connection.Socket.EndSend(ar);
if (writeBytes < writeMessage.PacketRemaining)
{
//----- Continue to send until all bytes are sent!
writeMessage.PacketOffSet += writeBytes;
connection.Socket.BeginSend(writeMessage.PacketBuffer, writeMessage.PacketOffSet, writeMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(InitializeProxySendCallback), callbackData);
}
else
{
writeMessage = null;
callbackData = null;
MessageBuffer readMessage = new MessageBuffer(4096);
connection.Socket.BeginReceive(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(InitializeProxyReceiveCallback), new CallbackData(connection, readMessage));
}
}
}
catch (Exception ex)
{
Host.FireOnException(connection, ex);
}
}
}
private byte[] ReadMessageWithMessageTail(byte[] connectionDelimiter, CallbackData callbackData, ref bool socketWasRead)
{
string stringDelimiter = Encoding.GetEncoding(1252).GetString(connectionDelimiter);
byte[] rawBuffer = null;
BaseSocketConnection connection = callbackData.Connection;
MessageBuffer readMessage = callbackData.Buffer;
//----- Message with delimiter!
int delimiterSize = connectionDelimiter.Length;
bool readPacket = false;
bool readSocket = false;
do
{
rawBuffer = null;
if (readMessage.PacketOffSet > delimiterSize)
{
int index = Encoding.GetEncoding(1252).GetString(readMessage.PacketBuffer).IndexOf(stringDelimiter);
if (index >= 0)
{
rawBuffer = readMessage.GetRawBufferWithTail(connection, index, delimiterSize);
//----- Decrypt!
rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
if (readMessage.PacketOffSet == 0)
{
readPacket = false;
readSocket = false;
}
else
{
readPacket = true;
readSocket = false;
FireOnReceived(connection, rawBuffer, false);
}
}
else
{
readPacket = false;
readSocket = true;
}
}
else
{
readPacket = false;
readSocket = (readMessage.PacketOffSet > 0);
}
} while (readPacket);
//----- Adjust room for more!
readMessage.Resize(FMessageBufferSize);
if (readSocket)
{
if (connection.Active)
{
//----- Read More!
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginRead(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, new AsyncCallback(BeginReadCallback), callbackData);
}
else
{
//----- Socket!
connection.Socket.BeginReceive(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginReadCallback), callbackData);
}
}
}
socketWasRead = readSocket;
return(rawBuffer);
}
private byte[] ReadMessageWithPacketHeader(byte[] connectionDelimiter, CallbackData callbackData, ref bool socketWasRead)
{
byte[] rawBuffer = null;
BaseSocketConnection connection = callbackData.Connection;
MessageBuffer readMessage = callbackData.Buffer;
//----- Message with delimiter!
int delimiterSize = connectionDelimiter.Length + 3;
bool readPacket = false;
bool readSocket = false;
do
{
rawBuffer = null;
if (readMessage.PacketOffSet > delimiterSize)
{
//----- Has Delimiter!
for (int i = 0; i < connectionDelimiter.Length; i++)
{
if (connectionDelimiter[i] != readMessage.PacketBuffer[i])
{
//----- Bad Delimiter!
throw new BadDelimiterException("Message delimiter is different from Host delimiter.");
}
}
//----- Get Length!
int messageLength = (readMessage.PacketBuffer[connectionDelimiter.Length] << 16)
+ (readMessage.PacketBuffer[connectionDelimiter.Length + 1] << 8)
+ (readMessage.PacketBuffer[connectionDelimiter.Length + 2]);
if (messageLength > FMessageBufferSize)
{
throw new MessageLengthException("Message length is greater than Host maximum message length.");
}
//----- Check Length!
if (messageLength == readMessage.PacketOffSet)
{
//----- Equal -> Get rawBuffer!
rawBuffer = readMessage.GetRawBuffer(messageLength, delimiterSize);
//----- Decrypt!
rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
readPacket = false;
readSocket = false;
}
else
{
if (messageLength < readMessage.PacketOffSet)
{
//----- Less -> Get rawBuffer and fire event!
rawBuffer = readMessage.GetRawBuffer(messageLength, delimiterSize);
//----- Decrypt!
rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
readPacket = true;
readSocket = false;
FireOnReceived(connection, rawBuffer, false);
}
else
{
if (messageLength > readMessage.PacketOffSet)
{
//----- Greater -> Read Socket!
if (messageLength > readMessage.PacketLength)
{
readMessage.Resize(messageLength);
}
readPacket = false;
readSocket = true;
}
}
}
}
else
{
if (readMessage.PacketRemaining < delimiterSize)
{
//----- Adjust room for more!
readMessage.Resize(readMessage.PacketLength + delimiterSize);
}
readPacket = false;
readSocket = true;
}
} while (readPacket);
if (readSocket)
{
if (connection.Active)
{
//----- Read More!
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginRead(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, new AsyncCallback(BeginReadCallback), callbackData);
}
else
{
//----- Socket!
connection.Socket.BeginReceive(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginReadCallback), callbackData);
}
}
}
socketWasRead = readSocket;
return(rawBuffer);
}
private void ReadBytesFromConnection(CallbackData callbackData, int readBytes)
{
BaseSocketConnection connection = callbackData.Connection;
MessageBuffer readMessage = callbackData.Buffer;
//----- Has bytes!
connection.LastAction = DateTime.Now;
byte[] rawBuffer = null;
bool socketWasRead = false;
readMessage.PacketOffSet += readBytes;
switch (connection.DelimiterType)
{
case DelimiterType.dtNone:
//----- Message with no delimiter!
rawBuffer = readMessage.GetRawBuffer(readBytes, 0);
break;
case DelimiterType.dtPacketHeader:
//----- Message with packet header!
rawBuffer = ReadMessageWithPacketHeader(connection.Delimiter, callbackData, ref socketWasRead);
break;
case DelimiterType.dtMessageTailExcludeOnReceive:
case DelimiterType.dtMessageTailIncludeOnReceive:
//----- Message with tail!
rawBuffer = ReadMessageWithMessageTail(connection.Delimiter, callbackData, ref socketWasRead);
break;
}
if (rawBuffer != null)
{
//----- Decrypt!
//rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
//----- Fire Event!
FireOnReceived(connection, rawBuffer, true);
}
readMessage = null;
callbackData = null;
if (!socketWasRead)
{
//----- Check Queue!
lock (connection.SyncReadCount)
{
connection.ReadCount--;
if (connection.ReadCount > 0)
{
//----- if it need more receiving, start the receive!
MessageBuffer continueReadMessage = new MessageBuffer(FSocketBufferSize);
//----- if the read queue has items, start to receive!
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginRead(continueReadMessage.PacketBuffer, continueReadMessage.PacketOffSet, continueReadMessage.PacketRemaining, new AsyncCallback(BeginReadCallback), new CallbackData(connection, continueReadMessage));
}
else
{
//----- Socket!
connection.Socket.BeginReceive(continueReadMessage.PacketBuffer, continueReadMessage.PacketOffSet, continueReadMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginReadCallback), new CallbackData(connection, continueReadMessage));
}
}
}
}
}
/// <summary>
/// Send Callback Processing.
/// </summary>
private void BeginSendCallbackProcessing(object state)
{
if (!Disposed)
{
IAsyncResult ar = (IAsyncResult)state;
BaseSocketConnection connection = null;
MessageBuffer writeMessage = null;
bool CanReadQueue = false;
try
{
CallbackData callbackData = (CallbackData)ar.AsyncState;
writeMessage = callbackData.Buffer;
connection = callbackData.Connection;
if (connection.Active)
{
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.EndWrite(ar);
FireOnSent(connection, writeMessage.RawBuffer, writeMessage.SentByServer);
CanReadQueue = true;
}
else
{
//----- Socket!
int writeBytes = connection.Socket.EndSend(ar);
if (writeBytes < writeMessage.PacketRemaining)
{
//----- Continue to send until all bytes are sent!
writeMessage.PacketOffSet += writeBytes;
connection.Socket.BeginSend(writeMessage.PacketBuffer, writeMessage.PacketOffSet, writeMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginSendCallback), callbackData);
}
else
{
FireOnSent(connection, writeMessage.RawBuffer, writeMessage.SentByServer);
CanReadQueue = true;
}
}
//----- Check Queue!
if (CanReadQueue)
{
callbackData = null;
writeMessage = null;
lock (connection.WriteQueue)
{
if (connection.WriteQueue.Count > 0)
{
//----- If has items, send it!
MessageBuffer dequeueWriteMessage = connection.WriteQueue.Dequeue();
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginWrite(dequeueWriteMessage.PacketBuffer, dequeueWriteMessage.PacketOffSet, dequeueWriteMessage.PacketRemaining, new AsyncCallback(BeginSendCallback), new CallbackData(connection, dequeueWriteMessage));
}
else
{
//----- Socket!
connection.Socket.BeginSend(dequeueWriteMessage.PacketBuffer, dequeueWriteMessage.PacketOffSet, dequeueWriteMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginSendCallback), new CallbackData(connection, dequeueWriteMessage));
}
}
else
{
connection.WriteQueueHasItems = false;
}
}
}
}
}
catch (Exception ex)
{
FireOnException(connection, ex);
}
}
}
private byte[] ReadMessageWithPacketHeader(byte[] connectionDelimiter, CallbackData callbackData, ref bool socketWasRead)
{
byte[] rawBuffer = null;
BaseSocketConnection connection = callbackData.Connection;
MessageBuffer readMessage = callbackData.Buffer;
//----- Message with delimiter!
int delimiterSize = connectionDelimiter.Length + 3;
bool readPacket = false;
bool readSocket = false;
do
{
rawBuffer = null;
if (readMessage.PacketOffSet > delimiterSize)
{
//----- Has Delimiter!
for (int i = 0; i < connectionDelimiter.Length; i++)
{
if (connectionDelimiter[i] != readMessage.PacketBuffer[i])
{
//----- Bad Delimiter!
throw new BadDelimiterException("Message delimiter is different from Host delimiter.");
}
}
//----- Get Length!
int messageLength = (readMessage.PacketBuffer[connectionDelimiter.Length] << 16)
+ (readMessage.PacketBuffer[connectionDelimiter.Length + 1] << 8)
+ (readMessage.PacketBuffer[connectionDelimiter.Length + 2]);
if (messageLength > FMessageBufferSize)
{
throw new MessageLengthException("Message length is greater than Host maximum message length.");
}
//----- Check Length!
if (messageLength == readMessage.PacketOffSet)
{
//----- Equal -> Get rawBuffer!
rawBuffer = readMessage.GetRawBuffer(messageLength, delimiterSize);
//----- Decrypt!
rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
readPacket = false;
readSocket = false;
}
else
{
if (messageLength < readMessage.PacketOffSet)
{
//----- Less -> Get rawBuffer and fire event!
rawBuffer = readMessage.GetRawBuffer(messageLength, delimiterSize);
//----- Decrypt!
rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
readPacket = true;
readSocket = false;
FireOnReceived(connection, rawBuffer, false);
}
else
{
if (messageLength > readMessage.PacketOffSet)
{
//----- Greater -> Read Socket!
if (messageLength > readMessage.PacketLength)
{
readMessage.Resize(messageLength);
}
readPacket = false;
readSocket = true;
}
}
}
}
else
{
if (readMessage.PacketRemaining < delimiterSize)
{
//----- Adjust room for more!
readMessage.Resize(readMessage.PacketLength + delimiterSize);
}
readPacket = false;
readSocket = true;
}
} while (readPacket);
if (readSocket)
{
if (connection.Active)
{
//----- Read More!
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginRead(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, new AsyncCallback(BeginReadCallback), callbackData);
}
else
{
//----- Socket!
connection.Socket.BeginReceive(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginReadCallback), callbackData);
}
}
}
socketWasRead = readSocket;
return rawBuffer;
}
private void ReadBytesFromConnection(CallbackData callbackData, int readBytes)
{
BaseSocketConnection connection = callbackData.Connection;
MessageBuffer readMessage = callbackData.Buffer;
//----- Has bytes!
connection.LastAction = DateTime.Now;
byte[] rawBuffer = null;
bool socketWasRead = false;
readMessage.PacketOffSet += readBytes;
switch (connection.DelimiterType)
{
case DelimiterType.dtNone:
//----- Message with no delimiter!
rawBuffer = readMessage.GetRawBuffer(readBytes, 0);
break;
case DelimiterType.dtPacketHeader:
//----- Message with packet header!
rawBuffer = ReadMessageWithPacketHeader(connection.Delimiter, callbackData, ref socketWasRead);
break;
case DelimiterType.dtMessageTailExcludeOnReceive:
case DelimiterType.dtMessageTailIncludeOnReceive:
//----- Message with tail!
rawBuffer = ReadMessageWithMessageTail(connection.Delimiter, callbackData, ref socketWasRead);
break;
}
if (rawBuffer != null)
{
//----- Decrypt!
//rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
//----- Fire Event!
FireOnReceived(connection, rawBuffer, true);
}
readMessage = null;
callbackData = null;
if(!socketWasRead)
{
//----- Check Queue!
lock (connection.SyncReadCount)
{
connection.ReadCount--;
if (connection.ReadCount > 0)
{
//----- if it need more receiving, start the receive!
MessageBuffer continueReadMessage = new MessageBuffer(FSocketBufferSize);
//----- if the read queue has items, start to receive!
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginRead(continueReadMessage.PacketBuffer, continueReadMessage.PacketOffSet, continueReadMessage.PacketRemaining, new AsyncCallback(BeginReadCallback), new CallbackData(connection, continueReadMessage));
}
else
{
//----- Socket!
connection.Socket.BeginReceive(continueReadMessage.PacketBuffer, continueReadMessage.PacketOffSet, continueReadMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginReadCallback), new CallbackData(connection, continueReadMessage));
}
}
}
}
}
private byte[] ReadMessageWithMessageTail(byte[] connectionDelimiter, CallbackData callbackData, ref bool socketWasRead)
{
string stringDelimiter = Encoding.GetEncoding(1252).GetString(connectionDelimiter);
byte[] rawBuffer = null;
BaseSocketConnection connection = callbackData.Connection;
MessageBuffer readMessage = callbackData.Buffer;
//----- Message with delimiter!
int delimiterSize = connectionDelimiter.Length;
bool readPacket = false;
bool readSocket = false;
do
{
rawBuffer = null;
if (readMessage.PacketOffSet > delimiterSize)
{
int index = Encoding.GetEncoding(1252).GetString(readMessage.PacketBuffer).IndexOf(stringDelimiter);
if (index >= 0)
{
rawBuffer = readMessage.GetRawBufferWithTail(connection, index, delimiterSize);
//----- Decrypt!
rawBuffer = CryptUtils.DecryptData(connection, rawBuffer, FMessageBufferSize);
if (readMessage.PacketOffSet == 0)
{
readPacket = false;
readSocket = false;
}
else
{
readPacket = true;
readSocket = false;
FireOnReceived(connection, rawBuffer, false);
}
}
else
{
readPacket = false;
readSocket = true;
}
}
else
{
readPacket = false;
readSocket = (readMessage.PacketOffSet > 0);
}
} while (readPacket);
//----- Adjust room for more!
readMessage.Resize(FMessageBufferSize);
if (readSocket)
{
if (connection.Active)
{
//----- Read More!
if (connection.Stream != null)
{
//----- Ssl!
connection.Stream.BeginRead(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, new AsyncCallback(BeginReadCallback), callbackData);
}
else
{
//----- Socket!
connection.Socket.BeginReceive(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(BeginReadCallback), callbackData);
}
}
}
socketWasRead = readSocket;
return rawBuffer;
}
private void InitializeConnectionReceiveCallback(IAsyncResult ar)
{
if (!Disposed)
{
BaseSocketConnection connection = null;
MessageBuffer readMessage = null;
try
{
CallbackData callbackData = (CallbackData)ar.AsyncState;
connection = callbackData.Connection;
readMessage = callbackData.Buffer;
if (connection.Active)
{
bool readSocket = true;
bool completed = false;
int readBytes = connection.Socket.EndReceive(ar);
if (readBytes > 0)
{
readMessage.PacketOffSet += readBytes;
byte[] message = null;
try
{
message = Convert.FromBase64String(Encoding.GetEncoding(1252).GetString(readMessage.PacketBuffer, 0, readMessage.PacketOffSet));
}
catch (FormatException)
{
//----- Base64 transformation error!
}
if ((message != null) && (Encoding.GetEncoding(1252).GetString(message).Contains("</AuthMessage>")))
{
//----- Get RSA provider!
RSACryptoServiceProvider serverPrivateKey;
RSACryptoServiceProvider clientPublicKey = new RSACryptoServiceProvider();
byte[] signMessage;
FCryptoService.OnSymmetricAuthenticate(connection, out serverPrivateKey, out signMessage);
//----- Deserialize authentication message!
MemoryStream m = new MemoryStream();
m.Write(message, 0, message.Length);
m.Position = 0;
XmlSerializer xml = new XmlSerializer(typeof(AuthMessage));
AuthMessage am = (AuthMessage)xml.Deserialize(m);
//----- Generates symmetric algoritm!
SymmetricAlgorithm sa = CryptUtils.CreateSymmetricAlgoritm(connection.EncryptType);
sa.Key = serverPrivateKey.Decrypt(am.SessionKey, false);
sa.IV = serverPrivateKey.Decrypt(am.SessionIV, false);
//----- Adjust connection cryptors!
connection.Encryptor = sa.CreateEncryptor();
connection.Decryptor = sa.CreateDecryptor();
//----- Verify sign!
clientPublicKey.FromXmlString(Encoding.UTF8.GetString(CryptUtils.DecryptDataForAuthenticate(sa, am.SourceKey, PaddingMode.ISO10126)));
m.SetLength(0);
m.Write(am.SourceKey, 0, am.SourceKey.Length);
m.Write(am.SessionKey, 0, am.SessionKey.Length);
m.Write(signMessage, 0, signMessage.Length);
if (clientPublicKey.VerifyData(CryptUtils.EncryptDataForAuthenticate(sa, m.ToArray(), PaddingMode.PKCS7), new SHA1CryptoServiceProvider(), am.Sign))
{
completed = true;
}
readSocket = false;
m.Close();
am.SessionIV.Initialize();
am.SessionKey.Initialize();
serverPrivateKey.Clear();
clientPublicKey.Clear();
readMessage = null;
callbackData = null;
if (!completed)
{
throw new SymmetricAuthenticationException("Symmetric sign error.");
}
FHost.FireOnConnected(connection);
}
if (readSocket)
{
connection.Socket.BeginReceive(readMessage.PacketBuffer, readMessage.PacketOffSet, readMessage.PacketRemaining, SocketFlags.None, new AsyncCallback(InitializeConnectionReceiveCallback), callbackData);
}
}
else
{
throw new SymmetricAuthenticationException("Symmetric authentication error.");
}
}
}
catch (Exception ex)
{
FHost.FireOnException(connection, ex);
}
}
}
