示例#1
0
        public override void SendIgnorableData(string msg)
        {
            SSH1DataWriter w = new SSH1DataWriter();

            w.WriteString(msg);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_IGNORE, w.ToByteArray());

            Transmit(p);
        }
示例#2
0
        public override byte[] HostKeyMD5FingerPrint()
        {
            SSH1DataWriter wr = new SSH1DataWriter();
            //RSA only for SSH1
            RSAPublicKey rsa = (RSAPublicKey)_hostkey;

            wr.WriteBigInteger(rsa.Exponent);
            wr.WriteBigInteger(rsa.Modulus);

            return(new MD5CryptoServiceProvider().ComputeHash(wr.ToByteArray()));
        }
示例#3
0
        public override string DumpHostKeyInKnownHostsStyle()
        {
            StringBuilder bld = new StringBuilder();

            bld.Append("ssh1 ");
            SSH1DataWriter wr = new SSH1DataWriter();
            //RSA only for SSH1
            RSAPublicKey rsa = (RSAPublicKey)_hostkey;

            wr.WriteBigInteger(rsa.Exponent);
            wr.WriteBigInteger(rsa.Modulus);
            bld.Append(Encoding.ASCII.GetString(Base64.Encode(wr.ToByteArray())));
            return(bld.ToString());
        }
示例#4
0
        //RSA authentication
        private void DoRSAChallengeResponse()
        {
            //read key
            SSH1UserAuthKey key = new SSH1UserAuthKey(_param.IdentityFile, _param.Password);
            SSH1DataWriter  w   = new SSH1DataWriter();

            w.WriteBigInteger(key.PublicModulus);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA, w.ToByteArray());

            p.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_CMSG_AUTH_RSA, "RSA challenge-reponse");

            DataFragment   response = ReceivePacket();
            SSH1DataReader reader   = new SSH1DataReader(response);
            PacketType     pt       = reader.ReadPacketType();

            if (pt == PacketType.SSH_SMSG_FAILURE)
            {
                throw new SSHException(Strings.GetString("ServerRefusedRSA"));
            }
            else if (pt != PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE)
            {
                throw new SSHException(String.Format(Strings.GetString("UnexpectedResponse"), pt));
            }
            TraceReceptionEvent(PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE, "received challenge");

            //creating challenge
            BigInteger challenge = key.decryptChallenge(reader.ReadMPInt());

            byte[] rawchallenge = RSAUtil.StripPKCS1Pad(challenge, 2).getBytes();

            //building response
            MemoryStream bos = new MemoryStream();

            bos.Write(rawchallenge, 0, rawchallenge.Length); //!!mindtermでは頭が0かどうかで変なハンドリングがあった
            bos.Write(_sessionID, 0, _sessionID.Length);
            byte[] reply = new MD5CryptoServiceProvider().ComputeHash(bos.ToArray());

            w = new SSH1DataWriter();
            w.Write(reply);
            p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, w.ToByteArray());
            p.WriteTo(_stream, _tCipher);
            TraceReceptionEvent(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, "received response");
        }
示例#5
0
        /**
         * closes this channel
         */
        public override void Close()
        {
            if (!_connection.IsOpen)
            {
                return;
            }

            if (_type == ChannelType.Shell)
            {
                SSH1DataWriter wr2 = new SSH1DataWriter();
                wr2.WriteInt32(_remoteID);
                SSH1Packet p2 = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_EOF, wr2.ToByteArray());
                Transmit(p2);
            }

            SSH1DataWriter wr = new SSH1DataWriter();

            wr.WriteInt32(_remoteID);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_CHANNEL_CLOSE, wr.ToByteArray());

            Transmit(p);
        }
示例#6
0
        /**
         * creates a packet as the input of shell
         */
        static SSH1Packet AsStdinString(byte[] input)
        {
            SSH1DataWriter w = new SSH1DataWriter();

            w.WriteAsString(input);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_STDIN_DATA, w.ToByteArray());

            return(p);
        }
示例#7
0
        /**
         * resizes the size of terminal
         */
        public override void ResizeTerminal(int width, int height, int pixel_width, int pixel_height)
        {
            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteInt32(height);
            writer.WriteInt32(width);
            writer.WriteInt32(pixel_width);
            writer.WriteInt32(pixel_height);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_WINDOW_SIZE, writer.ToByteArray());

            Transmit(p);
        }
示例#8
0
        /**
         * transmits channel data
         */
        public override void Transmit(byte[] data, int offset, int length)
        {
            SSH1DataWriter wr = new SSH1DataWriter();

            if (_type == ChannelType.Shell)
            {
                wr.WriteAsString(data, offset, length);
                SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_STDIN_DATA, wr.ToByteArray());
                Transmit(p);
            }
            else
            {
                wr.WriteInt32(_remoteID);
                wr.WriteAsString(data, offset, length);
                SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_CHANNEL_DATA, wr.ToByteArray());
                Transmit(p);
            }
        }
示例#9
0
        public override void ListenForwardedPort(string allowed_host, int bind_port)
        {
            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteInt32(bind_port);
            writer.WriteString(allowed_host);
            writer.WriteInt32(0);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_PORT_FORWARD_REQUEST, writer.ToByteArray());

            p.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_CMSG_PORT_FORWARD_REQUEST, "start to listening to remote port: host={0} port={1}", allowed_host, bind_port);

            if (_shellID == -1)
            {
                ExecShell();
                _shellID = _channel_collection.RegisterChannelEventReceiver(null, new SSH1DummyReceiver()).LocalID;
            }
        }
示例#10
0
        private void ProcessPortforwardingRequest(ISSHConnectionEventReceiver receiver, SSH1DataReader reader)
        {
            int    server_channel = reader.ReadInt32();
            string host           = Encoding.ASCII.GetString(reader.ReadString());
            int    port           = reader.ReadInt32();

            SSH1DataWriter            writer = new SSH1DataWriter();
            PortForwardingCheckResult result = receiver.CheckPortForwardingRequest(host, port, "", 0);

            if (result.allowed)
            {
                int local_id = _channel_collection.RegisterChannelEventReceiver(null, result.channel).LocalID;
                _eventReceiver.EstablishPortforwarding(result.channel, new SSH1Channel(this, ChannelType.ForwardedRemoteToLocal, local_id, server_channel));

                writer.WriteInt32(server_channel);
                writer.WriteInt32(local_id);
                SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_CHANNEL_OPEN_CONFIRMATION, writer.ToByteArray());
                p.WriteTo(_stream, _tCipher);
            }
            else
            {
                writer.WriteInt32(server_channel);
                SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_CHANNEL_OPEN_FAILURE, writer.ToByteArray());
                p.WriteTo(_stream, _tCipher);
            }
        }
示例#11
0
        private void SendRequestPTY()
        {
            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteString(_param.TerminalName);
            writer.WriteInt32(_param.TerminalHeight);
            writer.WriteInt32(_param.TerminalWidth);
            writer.WriteInt32(_param.TerminalPixelWidth);
            writer.WriteInt32(_param.TerminalPixelHeight);
            writer.Write(new byte[1]); //TTY_OP_END
            SSH1Packet SSH1Packet = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_REQUEST_PTY, writer.ToByteArray());

            SSH1Packet.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_CMSG_REQUEST_PTY, "open shell: terminal={0} width={1} height={2}", _param.TerminalName, _param.TerminalWidth, _param.TerminalHeight);
        }
示例#12
0
        public override SSHChannel ForwardPort(ISSHChannelEventReceiver receiver, string remote_host, int remote_port, string originator_host, int originator_port)
        {
            if (_shellID == -1)
            {
                ExecShell();
                _shellID = _channel_collection.RegisterChannelEventReceiver(null, new SSH1DummyReceiver()).LocalID;
            }

            int local_id = _channel_collection.RegisterChannelEventReceiver(null, receiver).LocalID;

            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteInt32(local_id); //channel id is fixed to 0
            writer.WriteString(remote_host);
            writer.WriteInt32(remote_port);
            //originator is specified only if SSH_PROTOFLAG_HOST_IN_FWD_OPEN is specified
            //writer.Write(originator_host);
            SSH1Packet SSH1Packet = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_PORT_OPEN, writer.ToByteArray());

            SSH1Packet.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_MSG_PORT_OPEN, "open forwarded port: host={0} port={1}", remote_host, remote_port);

            return(new SSH1Channel(this, ChannelType.ForwardedLocalToRemote, local_id));
        }
示例#13
0
        private void SendExecCommand()
        {
            Debug.WriteLine("EXEC COMMAND");
            string         cmd    = _execCmd;
            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteString(cmd);
            SSH1Packet SSH1Packet = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_EXEC_CMD, writer.ToByteArray());

            SSH1Packet.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_CMSG_EXEC_CMD, "exec command: cmd={0}", cmd);
        }
示例#14
0
        public override void Disconnect(string msg)
        {
            if (!this.IsOpen)
            {
                return;
            }
            SSH1DataWriter w = new SSH1DataWriter();

            w.WriteString(msg);
            SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_DISCONNECT, w.ToByteArray());

            p.WriteTo(_stream, _tCipher);
            base.Close();
        }
示例#15
0
        private void SendPlainPassword()
        {
            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteString(_param.Password);
            SSH1Packet SSH1Packet = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_PASSWORD, writer.ToByteArray());

            SSH1Packet.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_CMSG_AUTH_PASSWORD, "sent password");
        }
示例#16
0
        private void SendUserName(string username)
        {
            SSH1DataWriter writer = new SSH1DataWriter();

            writer.WriteString(username);
            SSH1Packet SSH1Packet = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_USER, writer.ToByteArray());

            SSH1Packet.WriteTo(_stream, _tCipher);
            TraceTransmissionEvent(PacketType.SSH_CMSG_USER, "sent user name");
        }
示例#17
0
        private void SendSessionKey(byte[] session_key)
        {
            try {
                //step1 XOR with session_id
                byte[] working_data = new byte[session_key.Length];
                byte[] session_id   = CalcSessionID();
                Array.Copy(session_key, 0, working_data, 0, session_key.Length);
                for (int i = 0; i < session_id.Length; i++)
                {
                    working_data[i] ^= session_id[i];
                }

                //step2 decrypts with RSA
                RSAPublicKey  first_encryption;
                RSAPublicKey  second_encryption;
                SSHServerInfo si = _cInfo._serverinfo;
                int           first_key_bytelen, second_key_bytelen;
                if (si.server_key_bits < si.host_key_bits)
                {
                    first_encryption   = new RSAPublicKey(si.server_key_public_exponent, si.server_key_public_modulus);
                    second_encryption  = new RSAPublicKey(si.host_key_public_exponent, si.host_key_public_modulus);
                    first_key_bytelen  = (si.server_key_bits + 7) / 8;
                    second_key_bytelen = (si.host_key_bits + 7) / 8;
                }
                else
                {
                    first_encryption   = new RSAPublicKey(si.host_key_public_exponent, si.host_key_public_modulus);
                    second_encryption  = new RSAPublicKey(si.server_key_public_exponent, si.server_key_public_modulus);
                    first_key_bytelen  = (si.host_key_bits + 7) / 8;
                    second_key_bytelen = (si.server_key_bits + 7) / 8;
                }

                Rng        rng           = RngManager.GetSecureRng();
                BigInteger first_result  = RSAUtil.PKCS1PadType2(new BigInteger(working_data), first_key_bytelen, rng).modPow(first_encryption.Exponent, first_encryption.Modulus);
                BigInteger second_result = RSAUtil.PKCS1PadType2(first_result, second_key_bytelen, rng).modPow(second_encryption.Exponent, second_encryption.Modulus);

                //output
                SSH1DataWriter writer = new SSH1DataWriter();
                writer.WriteByte((byte)_cInfo._algorithmForTransmittion);
                writer.Write(si.anti_spoofing_cookie);
                writer.WriteBigInteger(second_result);
                writer.WriteInt32(0); //protocol flags

                //send
                TraceTransmissionEvent(PacketType.SSH_CMSG_SESSION_KEY, "sent encrypted session-keys");
                SSH1Packet packet = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_SESSION_KEY, writer.ToByteArray());
                packet.WriteTo(_stream);

                _sessionID = session_id;
            }
            catch (Exception e) {
                if (e is IOException)
                {
                    throw (IOException)e;
                }
                else
                {
                    string t = e.StackTrace;
                    throw new SSHException(e.Message); //IOException以外はみなSSHExceptionにしてしまう
                }
            }
        }