Example #1
0
        public override SSHChannel OpenShell(ISSHChannelEventReceiver receiver)
        {
            //open channel
            SSH2DataWriter wr = new SSH2DataWriter();
            wr.WritePacketType(PacketType.SSH_MSG_CHANNEL_OPEN);
            wr.Write("session");
            int local_channel = this.RegisterChannelEventReceiver(null, receiver)._localID;

            wr.Write(local_channel);
            wr.Write(_param.WindowSize); //initial window size
            int windowsize = _param.WindowSize;
            wr.Write(_param.MaxPacketSize); //max packet size
            SSH2Channel channel = new SSH2Channel(this, ChannelType.Shell, local_channel);
            TransmitPacket(wr.ToByteArray());

            return channel;
        }
Example #2
0
        private void ProcessPortforwardingRequest(ISSHConnectionEventReceiver receiver, SSH2DataReader reader)
        {
            string method = Encoding.ASCII.GetString(reader.ReadString());

            int remote_channel = reader.ReadInt32();
            int window_size = reader.ReadInt32(); //skip initial window size
            int servermaxpacketsize = reader.ReadInt32();
            string host = Encoding.ASCII.GetString(reader.ReadString());
            int port = reader.ReadInt32();
            string originator_ip = Encoding.ASCII.GetString(reader.ReadString());
            int originator_port = reader.ReadInt32();

            PortForwardingCheckResult r = receiver.CheckPortForwardingRequest(host,port,originator_ip,originator_port);
            SSH2DataWriter wr = new SSH2DataWriter();
            if(r.allowed) {
                //send OPEN_CONFIRMATION
                SSH2Channel channel = new SSH2Channel(this, ChannelType.ForwardedRemoteToLocal, RegisterChannelEventReceiver(null, r.channel)._localID, remote_channel, servermaxpacketsize);
                wr.WritePacketType(PacketType.SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
                wr.Write(remote_channel);
                wr.Write(channel.LocalChannelID);
                wr.Write(_param.WindowSize); //initial window size
                wr.Write(_param.MaxPacketSize); //max packet size
                receiver.EstablishPortforwarding(r.channel, channel);
            }
            else {
                wr.WritePacketType(PacketType.SSH_MSG_CHANNEL_OPEN_FAILURE);
                wr.Write(remote_channel);
                wr.Write(r.reason_code);
                wr.Write(r.reason_message);
                wr.Write(""); //lang tag
            }
            TransmitPacket(wr.ToByteArray());
        }
Example #3
0
        public override SSHChannel ForwardPort(ISSHChannelEventReceiver receiver, string remote_host, int remote_port, string originator_host, int originator_port)
        {
            SSH2DataWriter wr = new SSH2DataWriter();
            wr.WritePacketType(PacketType.SSH_MSG_CHANNEL_OPEN);
            wr.Write("direct-tcpip");
            int local_id = RegisterChannelEventReceiver(null, receiver)._localID;
            wr.Write(local_id);
            wr.Write(_param.WindowSize); //initial window size
            int windowsize = _param.WindowSize;
            wr.Write(_param.MaxPacketSize); //max packet size
            wr.Write(remote_host);
            wr.Write(remote_port);
            wr.Write(originator_host);
            wr.Write(originator_port);

            SSH2Channel channel = new SSH2Channel(this, ChannelType.ForwardedLocalToRemote, local_id);

            TransmitPacket(wr.ToByteArray());

            return channel;
        }