public void ConnectHost(string i_HostIp)
{
m_Socket.Connect(i_HostIp, 22);
// Recieving server version
m_Buffer = new byte[m_BufferLength];
m_RecievedBytes = m_Socket.Receive(m_Buffer);
// checking the recieved buffer if it is the server version
if (m_RecievedBytes > 0)
{
// removing \r\n
if (m_Buffer[m_RecievedBytes - 1] == 10)
{
m_RecievedBytes--;
if (m_Buffer[m_RecievedBytes - 1] == 13)
{
m_RecievedBytes--;
}
// Decoding server version
m_ServerVersionString= Encoding.ASCII.GetString(m_Buffer, 0, m_RecievedBytes);
Trace.WriteLine(string.Format("Server version {0}", m_ServerVersionString));
// Sending client version
m_Socket.Send(Encoding.ASCII.GetBytes(m_ClientVersionString));
// Client send key exchange supported encryptions
m_KexPhasesManager = new KexPhasesManager();
m_KexPhasesManager.ClientKexPacket.MessageCode = eSshMessages.SSH_MSG_KEXINIT;
m_KexPhasesManager.ClientKexPacket.kex_algorithms.SetNameList("diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1");
m_KexPhasesManager.ClientKexPacket.server_host_key_algorithms.SetNameList("ssh-rsa,ssh-dss");
m_KexPhasesManager.ClientKexPacket.encryption_algorithms_client_to_server.SetNameList("aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]");
m_KexPhasesManager.ClientKexPacket.encryption_algorithms_server_to_client.SetNameList("aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]");
m_KexPhasesManager.ClientKexPacket.mac_algorithms_client_to_server.SetNameList("hmac-sha1,hmac-sha1-96,hmac-md5");
m_KexPhasesManager.ClientKexPacket.mac_algorithms_server_to_client.SetNameList("hmac-sha1,hmac-sha1-96,hmac-md5");
m_KexPhasesManager.ClientKexPacket.compression_algorithms_client_to_server.SetNameList("none,zlib");
m_KexPhasesManager.ClientKexPacket.compression_algorithms_server_to_client.SetNameList("none,zlib");
m_KexPhasesManager.ClientKexPacket.languages_client_to_server.SetNameList(string.Empty);
m_KexPhasesManager.ClientKexPacket.languages_server_to_client.SetNameList(string.Empty);
/*m_SshKeyExchangePacketClient.kex_algorithms.SetNameList("diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1");
m_SshKeyExchangePacketClient.server_host_key_algorithms.SetNameList("ssh-rsa,ssh-dss");
m_SshKeyExchangePacketClient.encryption_algorithms_client_to_server.SetNameList("3des-cbc,aes128-cbc");
m_SshKeyExchangePacketClient.encryption_algorithms_server_to_client.SetNameList("3des-cbc,aes128-cbc");
m_SshKeyExchangePacketClient.mac_algorithms_client_to_server.SetNameList("hmac-md5,hmac-sha1");
m_SshKeyExchangePacketClient.mac_algorithms_server_to_client.SetNameList("hmac-md5,hmac-sha1");
m_SshKeyExchangePacketClient.compression_algorithms_client_to_server.SetNameList("none");
m_SshKeyExchangePacketClient.compression_algorithms_server_to_client.SetNameList("none");
m_SshKeyExchangePacketClient.languages_client_to_server.SetNameList(string.Empty);
m_SshKeyExchangePacketClient.languages_server_to_client.SetNameList(string.Empty);
*/
m_KexPhasesManager.SetPayloadAsClientKex();
// sending to server
m_Socket.Send(m_KexPhasesManager.SshPacket.ToByteArray());
// receiving from server
m_RecievedBytes = m_Socket.Receive(m_Buffer);
m_KexPhasesManager.SshPacket.ParseBuffer(m_Buffer);
if (m_KexPhasesManager.ParseServerSshMsgKexInit())
{
// server sent SSH_MSG_KEXINIT
if (m_KexPhasesManager.ServerKexPacket.first_kex_packet_follows)
{
Debug.WriteLine("Next packet is guessed key");
}
else
{
if (m_KexPhasesManager.SearchKexAlgorithem() == true)
{
m_KexPhasesManager.CreateSshMsgKexDhGexRequestOld(4096);
// SSH_MSG_KEX_DH_GEX_REQUEST_OLD
m_Socket.Send(m_KexPhasesManager.SshPacket.ToByteArray());
// DH key exchange reply
#region DH region
m_Buffer = new byte[m_BufferLength];
m_RecievedBytes = m_Socket.Receive(m_Buffer);
m_KexPhasesManager.SshPacket.ParseBuffer(m_Buffer);
if (m_KexPhasesManager.ComputePublicKeyToServer())
{
#region SSH_MSG_KEX_DH_GEX_INIT
m_KexPhasesManager.CreateSshMsgKexDhGexInit();
m_Socket.Send(m_KexPhasesManager.SshPacket.ToByteArray());
#endregion SSH_MSG_KEX_DH_GEX_INIT
m_Buffer = new byte[m_BufferLength];
m_RecievedBytes = m_Socket.Receive(m_Buffer);
m_KexPhasesManager.SshPacket.ParseBuffer(m_Buffer);
m_KexPhasesManager.ParseServerSshMsgKexDhGexReply();
Debug.Write("Finished DH Key Exchange Reply");
}
}
#endregion DH region
else
{
Debug.WriteLine("No supported kex_algorithms was found, disconnecting session");
m_Socket.Shutdown(SocketShutdown.Both);
m_Socket.Disconnect(false);
}
}
}
}
}
else
{
Trace.WriteLine("Corrupt packege recieved");
}
}
public ClassSshLayer()
{
m_Random = new Random();
m_KexPhasesManager = null;
m_Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
m_Buffer = null;
m_ClientVersionString = "SSH-2.0-SshLayer_1.0.0.0\r\n";
}