AutoIt

TCP or TLS over Multiple Hop SSH to Remote Server

See more Socket/SSL/TLS Examples

Demonstrates how to use the Chilkat Socket API to connect to a remote server (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => DestinationServer

The ConnectThroughSsh and UseSsh methods are added in Chilkat version 9.5.0.55 to accomplish this task.

AutoIt

Local $bSuccess = False

; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

$oSsh1 = ObjCreate("Chilkat.Ssh")

; Connect directly to the 1st SSH server.
$bSuccess = $oSsh1.Connect("serverssh1.com",22)
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh1.LastErrorText & @CRLF)
    Exit
EndIf

; Authenticate using login/password:
$bSuccess = $oSsh1.AuthenticatePw("ssh1Login","ssh1Password")
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh1.LastErrorText & @CRLF)
    Exit
EndIf

; Connect through the 1st SSH connection to reach a 2nd SSH server.
; Note: Any number of SSH connections may be simultaneously tunneled through a single
; existing SSH connection.
$oSsh2 = ObjCreate("Chilkat.Ssh")
$bSuccess = $oSsh2.ConnectThroughSsh($oSsh1,"serverssh2.com",22)
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh2.LastErrorText & @CRLF)
    Exit
EndIf

; Authenticate with ssh2...
$bSuccess = $oSsh2.AuthenticatePw("ssh2Login","ssh2Password")
If ($bSuccess <> True) Then
    ConsoleWrite($oSsh2.LastErrorText & @CRLF)
    Exit
EndIf

$oSocket = ObjCreate("Chilkat.Socket")

; Tell the socket object to connect to our destination server though the ssh2 tunnel (which itself is routed through ssh1).
; The connection looks like this:  ApplicationSocket(TLS) => ServerSSH1 => ServerSSH2 => DestinationServer
$bSuccess = $oSocket.UseSsh($oSsh2)
If ($bSuccess <> True) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

; Connect using TLS to www.chilkatsoft.com
; We could also tunnel a bare TCP connection by specifying port 80 with useTls = False.
Local $bUseTls = True
Local $iMaxWaitMillisec = 20000
$bSuccess = $oSocket.Connect("www.chilkatsoft.com",443,$bUseTls,$iMaxWaitMillisec)
If ($bSuccess <> True) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

; Once the multiple hop SSH tunneled connection is setup,  the socket programming
; is identical to the normal case where we have a direct connection.

; Tell the socket object that all text is to be sent in the utf-8 encoding,
; and the text received is assumed to be utf-8.
$oSocket.StringCharset = "utf-8"

; Send an HTTP HEAD request:
$bSuccess = $oSocket.SendString("HEAD / HTTP/1.1" & @CRLF & "Host: www.chilkatsoft.com" & @CRLF & @CRLF)
If ($bSuccess <> True) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

; Wait a maximum of 4 seconds while no data is forthcoming:
$oSocket.MaxReadIdleMs = 4000

; Get the 1st response line, which should be "HTTP/1.1 200 OK"
Local $sResponseStatusLine = $oSocket.ReceiveToCRLF()
If ($oSocket.LastMethodSuccess <> True) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("StatusLine: " & $sResponseStatusLine & @CRLF)

; Now get the 1st line of the response header:
Local $sResponseHeaderLine = $oSocket.ReceiveToCRLF()
If ($oSocket.LastMethodSuccess <> True) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("HeaderLine: " & $sResponseHeaderLine & @CRLF)

; Now read the remainder of the response header by reading until a double CRLF is seen:
Local $sRemainderOfHeader = $oSocket.ReceiveUntilMatch(@CRLF & @CRLF)
If ($oSocket.LastMethodSuccess <> True) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Remainder: " & $sRemainderOfHeader & @CRLF)

; Close the connection with the server.  This closes the tunnel through ssh2.
; Wait a max of 20 seconds (20000 millsec)
$bSuccess = $oSocket.Close(20000)

; Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
; The connection with ssh1 is still alive, and may be used for more connections.
$oSsh2.Disconnect 

$oSsh1.Disconnect