(Xojo Plugin) SSH Tunnel with Dynamic Port Forwarding

Demonstrates how to start a background thread that runs a portable SSH tunnel w/ dynamic port forwarding that the foreground thread can use for establishing connections through an SSH tunnel.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
Dim chilkatGlob As New Chilkat.CkGlobal
Dim success As Boolean
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> True) Then
    System.DebugLog(chilkatGlob.LastErrorText)
    Return
End If

// This example requires Chilkat version 9.5.0.50 or greater.
Dim tunnel As New Chilkat.SshTunnel

Dim sshHostname As String
sshHostname = "sftp.example.com"
Dim sshPort As Int32
sshPort = 22

// Connect to an SSH server and establish the SSH tunnel:
success = tunnel.Connect(sshHostname,sshPort)
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Authenticate with the SSH server via a login/password
// or with a public key.  
// This example demonstrates SSH password authentication.
success = tunnel.AuthenticatePw("mySshLogin","mySshPassword")
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Indicate that the background SSH tunnel thread will behave as a SOCKS proxy server
// with dynamic port forwarding:
tunnel.DynamicPortForwarding = True

// We may optionally require that connecting clients authenticate with our SOCKS proxy server.
// To do this, set an inbound username/password.  Any connecting clients would be required to 
// use SOCKS5 with the correct username/password.
// If no inbound username/password is set, then our SOCKS proxy server will accept both
// SOCKS4 and SOCKS5 unauthenticated connections.

tunnel.InboundSocksUsername = "chilkat123"
tunnel.InboundSocksPassword = "password123"

// Start the listen/accept thread to begin accepting SOCKS proxy client connections.
// Listen on port 1080.
success = tunnel.BeginAccepting(1080)
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Now that a background thread is running a SOCKS proxy server that forwards connections
// through an SSH tunnel, it is possible to use any Chilkat implemented protocol that is SOCKS capable,
// such as HTTP, POP3, SMTP, IMAP, FTP, etc.  The protocol may use SSL/TLS because the SSL/TLS
// will be passed through the SSH tunnel to the end-destination.  Also, any number of simultaneous
// connections may be routed through the SSH tunnel.

// For this example, let's do a simple HTTPS request:
Dim url As String
url = "https://www.ethereum.org/"

Dim http As New Chilkat.Http

// Indicate that the HTTP object is to use our portable SOCKS proxy/SSH tunnel running in our background thread.
http.SocksHostname = "localhost"
http.SocksPort = 1080
http.SocksVersion = 5
http.SocksUsername = "chilkat123"
http.SocksPassword = "password123"

http.SendCookies = True
http.SaveCookies = True
http.CookieDir = "memory"

// Do the HTTPS page fetch (through the SSH tunnel)
Dim html As String
html = http.QuickGetStr(url)
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

// Stop the background listen/accept thread:
Dim waitForThreadExit As Boolean
waitForThreadExit = True
success = tunnel.StopAccepting(waitForThreadExit)
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Close the SSH tunnel (would also kick any remaining connected clients).
success = tunnel.CloseTunnel(waitForThreadExit)
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If