public PacketGeneral(int message) : base() { cache = new MemoryStream(); writer = new NetworkByteWriter(cache); writer.WriteByte((byte)message); }
public void Authenticate(string username, string password) { PacketGeneral packet_auth = new PacketGeneral(Packet.SSH_MSG_USERAUTH_REQUEST); packet_auth.GetStreamWriter().WriteString("ssh-userauth"); SendPacket(crypto_encryptor, packet_auth); Packet packet = RecvPacket(crypto_decryptor); if (packet.Message == Packet.SSH_MSG_SERVICE_ACCEPT) { Console.WriteLine("SSH_MSG_SERVICE_ACCEPT"); } packet_auth = new PacketGeneral(50); NetworkByteWriter nbw_cache = packet_auth.GetStreamWriter(); //SSH_MSG_USERAUTH_REQUEST nbw_cache.WriteString(username); nbw_cache.WriteString("ssh-connection"); nbw_cache.WriteString("password"); nbw_cache.WriteByte((byte)0); nbw_cache.WriteString(password); SendPacket(crypto_encryptor, packet_auth); packet = RecvPacket(crypto_decryptor); if (Packet.SSH_MSG_USERAUTH_SUCCESS == packet.Message) { Console.WriteLine("oh ya!"); } }
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 PrepareCryptoTransforms() { byte[] key_cache; HashAlgorithm hash_key = SHA1.Create(); // { MemoryStream ms_cache = new MemoryStream(); NetworkByteWriter nbw_cache = new NetworkByteWriter(ms_cache); nbw_cache.WriteMPInt(verify_k); nbw_cache.WriteBytes(verify_h); nbw_cache.WriteByte((byte)0x41); nbw_cache.WriteBytes(verify_h); key_cache = ms_cache.ToArray(); } byte[] IVc2s = hash_key.ComputeHash(key_cache); int j = key_cache.Length - verify_h.Length - 1; key_cache[j] = 0x42; byte[] IVs2c = hash_key.ComputeHash(key_cache); key_cache[j] = 0x43; byte[] Ec2s = hash_key.ComputeHash(key_cache); key_cache[j] = 0x44; byte[] Es2c = hash_key.ComputeHash(key_cache); key_cache[j] = 0x45; byte[] MACc2s = hash_key.ComputeHash(key_cache); key_cache[j] = 0x46; byte[] MACs2c = hash_key.ComputeHash(key_cache); { byte[] tmp = new byte[16]; Array.Copy(Ec2s, 0, tmp, 0, tmp.Length); Ec2s = tmp; } { byte[] tmp = new byte[16]; Array.Copy(IVc2s, 0, tmp, 0, tmp.Length); IVc2s = tmp; } { byte[] tmp = new byte[16]; Array.Copy(Es2c, 0, tmp, 0, tmp.Length); Es2c = tmp; } { byte[] tmp = new byte[16]; Array.Copy(IVs2c, 0, tmp, 0, tmp.Length); IVs2c = tmp; } RijndaelManaged rijndael = new RijndaelManaged(); rijndael.Mode = CipherMode.CBC; rijndael.Padding = PaddingMode.None; crypto_encryptor = rijndael.CreateEncryptor(Ec2s, IVc2s); crypto_decryptor = rijndael.CreateDecryptor(Es2c, IVs2c); crypto_mac_encryptor = HMACSHA1.Create(); ((HMAC)crypto_mac_encryptor).Key = MACc2s; }
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 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 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); } } } }