using System;
using System.Windows.Forms;
/* StreamForwarding.cs
* ====================================================================
* The following example was posted with the original JSch java library,
* and is translated to C# to show the usage of SharpSSH JSch API
* ====================================================================
* */
namespace Tamir.SharpSsh.jsch.examples{
/// <summary>
/// This program will demonstrate the stream forwarding. The given Java
/// I/O streams will be forwared to the given remote host and port on
/// the remote side. It is simmilar to the -L option of ssh command,
/// but you don't have to assign and open a local tcp port.
/// You will be asked username, hostname, host:hostport and passwd.
/// If everything works fine, System.in and System.out streams will be
/// forwared to remote port and you can send messages from command line.
/// </summary>
public class StreamForwarding
{
public static void Main(String[] arg)
{
int port;
try
{
//Create a new JSch instance
JSch jsch=new JSch();
//Prompt for username and server host
Console.WriteLine("Please enter the user and host info at the popup window...");
String host = InputForm.GetUserInput
("Enter username@hostname",
Environment.UserName+"@localhost");
String user=host.Substring(0, host.IndexOf('@'));
host=host.Substring(host.IndexOf('@')+1);
//Create a new SSH session
Session session=jsch.getSession(user, host, 22);
// username and password will be given via UserInfo interface.
UserInfo ui=new MyUserInfo();
session.setUserInfo(ui);
session.connect();
//Get from user the remote host and remote host port
String foo = InputForm.GetUserInput("Enter host and port", "host:port");
host=foo.Substring(0, foo.IndexOf(':'));
port=int.Parse(foo.Substring(foo.IndexOf(':')+1));
Console.WriteLine("System.{in,out} will be forwarded to "+
host+":"+port+".");
Channel channel=session.openChannel("direct-tcpip");
((ChannelDirectTCPIP)channel).setInputStream(Console.OpenStandardInput());
((ChannelDirectTCPIP)channel).setOutputStream(Console.OpenStandardOutput());
((ChannelDirectTCPIP)channel).setHost(host);
((ChannelDirectTCPIP)channel).setPort(port);
channel.connect();
while(!channel.isClosed())
{
System.Threading.Thread.Sleep(500);
}
channel.disconnect();
session.disconnect();
}
catch(Exception e)
{
Console.WriteLine(e);
}
}
/// <summary>
/// A user info for getting user data
/// </summary>
public class MyUserInfo : UserInfo
{
/// <summary>
/// Holds the user password
/// </summary>
private String passwd;
/// <summary>
/// Returns the user password
/// </summary>
public String getPassword(){ return passwd; }
/// <summary>
/// Prompt the user for a Yes/No input
/// </summary>
public bool promptYesNo(String str)
{
return InputForm.PromptYesNo(str);
}
/// <summary>
/// Returns the user passphrase (passwd for the private key file)
/// </summary>
public String getPassphrase(){ return null; }
/// <summary>
/// Prompt the user for a passphrase (passwd for the private key file)
/// </summary>
public bool promptPassphrase(String message){ return true; }
/// <summary>
/// Prompt the user for a password
/// </summary>\
public bool promptPassword(String message)
{
passwd=InputForm.GetUserInput(message, true);
return true;
}
/// <summary>
/// Shows a message to the user
/// </summary>
public void showMessage(String message)
{
InputForm.ShowMessage(message);
}
}
}
}
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