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SMTP over Multiple Hop SSH

Demonstrates how to send email (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => SmtpServer

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

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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

$oMailman = ObjCreate("Chilkat.MailMan")

;  Tell the mailman object to connect to the SMTP server though the ssh2 tunnel (which itself is routed through ssh1).
;  The connection looks like this:  Application => ServerSSH1 => ServerSSH2 => SMTPServer
$bSuccess = $oMailman.UseSsh($oSsh2)
If ($bSuccess <> True) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

;  Set the SMTP server.
$oMailman.SmtpHost = "smtp.someserver.com"

;  Set the SMTP login/password (if required)
$oMailman.SmtpUsername = "myUsername"
$oMailman.SmtpPassword = "myPassword"

;  Create a new email object
$oEmail = ObjCreate("Chilkat.Email")

$oEmail.Subject = "This is a test"
$oEmail.Body = "This is a test"
$oEmail.From = "Chilkat Support <support@chilkatsoft.com>"
$bSuccess = $oEmail.AddTo("Chilkat Admin","admin@chilkatsoft.com")

$bSuccess = $oMailman.SendEmail($oEmail)
If ($bSuccess <> True) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

;  Close the connection with the server.  This closes the tunnel through ssh2.
$bSuccess = $oMailman.CloseSmtpConnection()
If ($bSuccess <> True) Then
    ConsoleWrite("Connection to SMTP server not closed cleanly." & @CRLF)
EndIf

ConsoleWrite("Mail Sent!" & @CRLF)

;  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