private bool ProcessPacket(SSH2Packet packet)
{
SSH2DataReader r = new SSH2DataReader(packet.Data);
PacketType pt = r.ReadPacketType();
//Debug.WriteLine("ProcessPacket pt="+pt);
if(pt==PacketType.SSH_MSG_DISCONNECT) {
int errorcode = r.ReadInt32();
//string description = Encoding.ASCII.GetString(r.ReadString());
_eventReceiver.OnConnectionClosed();
return false;
}
else if(_waitingForPortForwardingResponse) {
if(pt!=PacketType.SSH_MSG_REQUEST_SUCCESS)
_eventReceiver.OnUnknownMessage((byte)pt, r.Image);
_waitingForPortForwardingResponse = false;
return true;
}
else if(pt==PacketType.SSH_MSG_CHANNEL_OPEN) {
ProcessPortforwardingRequest(_eventReceiver, r);
return true;
}
else if(pt>=PacketType.SSH_MSG_CHANNEL_OPEN_CONFIRMATION && pt<=PacketType.SSH_MSG_CHANNEL_FAILURE) {
int local_channel = r.ReadInt32();
ChannelEntry e = FindChannelEntry(local_channel);
if(e!=null) //throw new SSHException("Unknown channel "+local_channel);
((SSH2Channel)e._channel).ProcessPacket(e._receiver, pt, 5+r.Rest, r);
else
Debug.WriteLine("unexpected channel pt="+pt+" local_channel="+local_channel.ToString());
return true;
}
else if(pt==PacketType.SSH_MSG_IGNORE) {
_eventReceiver.OnIgnoreMessage(r.ReadString());
return true;
}
else if(_asyncKeyExchanger!=null) {
_asyncKeyExchanger.AsyncProcessPacket(packet);
return true;
}
else if(pt==PacketType.SSH_MSG_KEXINIT) {
Debug.WriteLine("Host sent KEXINIT");
_asyncKeyExchanger = new KeyExchanger(this, _sessionID);
_asyncKeyExchanger.AsyncProcessPacket(packet);
return true;
}
else {
_eventReceiver.OnUnknownMessage((byte)pt, r.Image);
return false;
}
}
internal override AuthenticationResult Connect(AbstractSocket s)
{
_stream = s;
KeyExchanger kex = new KeyExchanger(this, null);
if(!kex.SynchronousKexExchange()) {
_stream.Close();
return AuthenticationResult.Failure;
}
//Step3 user authentication
ServiceRequest("ssh-userauth");
_authenticationResult = UserAuth();
return _authenticationResult;
}
internal void RefreshKeys(byte[] sessionID, Cipher tc, Cipher rc, MAC tm, MAC rm)
{
_sessionID = sessionID;
_tCipher = tc;
_tMAC = tm;
_packetBuilder.SetCipher(rc, _param.CheckMACError? rm : null);
_asyncKeyExchanger = null;
}
public void ReexchangeKeys()
{
_asyncKeyExchanger = new KeyExchanger(this, _sessionID);
_asyncKeyExchanger.AsyncStartReexchange();
}