override public void Pack() { MemoryStream ms = new MemoryStream(); NetworkByteWriter nbw = new NetworkByteWriter(ms); nbw.WriteByte((byte)Message); nbw.WriteBytes(cookie); nbw.WriteNameList(kex_algorithms); nbw.WriteNameList(server_host_key_algorithms); nbw.WriteNameList(encryption_algorithms_client_to_server); nbw.WriteNameList(encryption_algorithms_server_to_client); nbw.WriteNameList(mac_algorithms_client_to_server); nbw.WriteNameList(mac_algorithms_server_to_client); nbw.WriteNameList(compression_algorithms_client_to_server); nbw.WriteNameList(compression_algorithms_server_to_client); nbw.WriteNameList(languages_client_to_server); nbw.WriteNameList(languages_server_to_client); nbw.WriteBoolean(first_kex_packet_follows); nbw.WriteUInt32(0); nbw.Flush(); SetPayload(ms.ToArray()); }
public void SendPacket(ICryptoTransform encryptor, Packet packet) { byte[] payload = packet.GetPayload(); int blocksize = 16; if (encryptor == null) { uint size = (uint)payload.Length; size += 5; size = (uint)((size + blocksize) / blocksize * blocksize); uint packet_length = size - 4; byte padding_length = (byte)(size - 5 - payload.Length); MemoryStream ms = new MemoryStream(); NetworkByteWriter nbw = new NetworkByteWriter(ms); nbw.WriteUInt32(packet_length); nbw.WriteByte(padding_length); nbw.WriteBytes(payload); for (int i = 0; i < padding_length; i++ ) nbw.WriteByte(0x0C); nbw.Flush(); writer.WriteBytes(ms.ToArray()); writer.Flush(); } else { blocksize = Math.Max(encryptor.InputBlockSize, blocksize); uint size = (uint)payload.Length; size += (5 + (uint)encryptor.InputBlockSize); size = (uint)((size + blocksize) / blocksize * blocksize); uint packet_length = size - 4; byte padding_length = (byte)(size - 5 - payload.Length); MemoryStream ms = new MemoryStream(); NetworkByteWriter nbw = new NetworkByteWriter(ms); nbw.WriteUInt32(packet_length); nbw.WriteByte(padding_length); nbw.WriteBytes(payload); for (int i = 0; i < padding_length; i++) nbw.WriteByte(0x0C); nbw.Flush(); // compute mac byte[] cache = ms.ToArray(); MemoryStream ms_mac = new MemoryStream(); NetworkByteWriter nbw_mac = new NetworkByteWriter(ms_mac); nbw_mac.WriteUInt32((uint)sequence); nbw_mac.WriteBytes(cache); nbw_mac.Flush(); byte[] mac = crypto_mac_encryptor.ComputeHash(ms_mac.ToArray()); crypto_encryptor.TransformBlock(cache, 0, cache.Length, cache, 0); writer.WriteBytes(cache); writer.Flush(); if (crypto_mac_encryptor != null) { writer.WriteBytes(mac); } } sequence++; }
public void SendPacket(ICryptoTransform encryptor, Packet packet) { byte[] payload = packet.GetPayload(); int blocksize = 16; if (encryptor == null) { uint size = (uint)payload.Length; size += 5; size = (uint)((size + blocksize) / blocksize * blocksize); uint packet_length = size - 4; byte padding_length = (byte)(size - 5 - payload.Length); MemoryStream ms = new MemoryStream(); NetworkByteWriter nbw = new NetworkByteWriter(ms); nbw.WriteUInt32(packet_length); nbw.WriteByte(padding_length); nbw.WriteBytes(payload); for (int i = 0; i < padding_length; i++) { nbw.WriteByte(0x0C); } nbw.Flush(); writer.WriteBytes(ms.ToArray()); writer.Flush(); } else { blocksize = Math.Max(encryptor.InputBlockSize, blocksize); uint size = (uint)payload.Length; size += (5 + (uint)encryptor.InputBlockSize); size = (uint)((size + blocksize) / blocksize * blocksize); uint packet_length = size - 4; byte padding_length = (byte)(size - 5 - payload.Length); MemoryStream ms = new MemoryStream(); NetworkByteWriter nbw = new NetworkByteWriter(ms); nbw.WriteUInt32(packet_length); nbw.WriteByte(padding_length); nbw.WriteBytes(payload); for (int i = 0; i < padding_length; i++) { nbw.WriteByte(0x0C); } nbw.Flush(); // compute mac byte[] cache = ms.ToArray(); MemoryStream ms_mac = new MemoryStream(); NetworkByteWriter nbw_mac = new NetworkByteWriter(ms_mac); nbw_mac.WriteUInt32((uint)sequence); nbw_mac.WriteBytes(cache); nbw_mac.Flush(); byte[] mac = crypto_mac_encryptor.ComputeHash(ms_mac.ToArray()); crypto_encryptor.TransformBlock(cache, 0, cache.Length, cache, 0); writer.WriteBytes(cache); writer.Flush(); if (crypto_mac_encryptor != null) { writer.WriteBytes(mac); } } sequence++; }
public override void Pack() { MemoryStream ms = new MemoryStream(); NetworkByteWriter nbw = new NetworkByteWriter(ms); nbw.WriteByte((byte)Message); nbw.WriteBytes(cookie); nbw.WriteNameList(kex_algorithms); nbw.WriteNameList(server_host_key_algorithms); nbw.WriteNameList(encryption_algorithms_client_to_server); nbw.WriteNameList(encryption_algorithms_server_to_client); nbw.WriteNameList(mac_algorithms_client_to_server); nbw.WriteNameList(mac_algorithms_server_to_client); nbw.WriteNameList(compression_algorithms_client_to_server); nbw.WriteNameList(compression_algorithms_server_to_client); nbw.WriteNameList(languages_client_to_server); nbw.WriteNameList(languages_server_to_client); nbw.WriteBoolean(first_kex_packet_follows); nbw.WriteUInt32(0); nbw.Flush(); SetPayload(ms.ToArray()); }
public void OpenChannel(VideoTerminal x) { PacketGeneral packet_openchannel = new PacketGeneral(90); NetworkByteWriter nbw = packet_openchannel.GetStreamWriter(); nbw.WriteString("session"); nbw.WriteUInt32(0); nbw.WriteUInt32(1048576); nbw.WriteUInt32(16384); SendPacket(crypto_encryptor, packet_openchannel); Packet packet = RecvPacket(crypto_decryptor); NetworkByteReader nbr = packet.GenerateReader(); nbr.ReadByte(); uint recipient_channel = nbr.ReadUInt32(); uint sender_channel = nbr.ReadUInt32(); uint initial_window_size = nbr.ReadUInt32(); uint maximum_packet_size = nbr.ReadUInt32(); PacketGeneral packet_pty = new PacketGeneral(Packet.SSH_MSG_CHANNEL_REQUEST); nbw = packet_pty.GetStreamWriter(); nbw.WriteUInt32(recipient_channel); nbw.WriteString("pty-req"); nbw.WriteByte(0); nbw.WriteString("vt100"); nbw.WriteUInt32(80); nbw.WriteUInt32(24); nbw.WriteUInt32(640); nbw.WriteUInt32(480); nbw.WriteString(""); SendPacket(crypto_encryptor, packet_pty); PacketGeneral packet_shell = new PacketGeneral(Packet.SSH_MSG_CHANNEL_REQUEST); nbw = packet_shell.GetStreamWriter(); nbw.WriteUInt32(recipient_channel); nbw.WriteString("shell"); nbw.WriteByte(0); SendPacket(crypto_encryptor, packet_shell); while (true) { if (RecvAvailable()) { packet = RecvPacket(crypto_decryptor); switch (packet.Message) { case Packet.SSH_MSG_CHANNEL_WINDOW_ADJUST: break; case Packet.SSH_MSG_CHANNEL_DATA: PacketChannelData p = new PacketChannelData(packet); p.Parse(); x.HandleServerData(p.data); break; default: break; } } else { string data = x.GetClientData(); if (data.Length != 0) { PacketGeneral packet_key = new PacketGeneral(Packet.SSH_MSG_CHANNEL_DATA); nbw = packet_key.GetStreamWriter(); nbw.WriteUInt32(recipient_channel); nbw.WriteString(data); SendPacket(crypto_encryptor, packet_key); } } } }