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Start SSH Tunnel Keyboard-Interactive Authentication

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Demonstrates the Chilkat SshTunnel.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts, which are answered with ContinueKeyboardAuth.

Background: Keyboard-interactive is the prompt-driven authentication method: the server sends one or more questions — a password, a one-time code, a security question — and the client answers each. This is how a tunnel supports two-factor and other challenge-response schemes. The returned XML says exactly what to ask and whether to mask the input.

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Local $bSuccess = False

;  Demonstrates the SshTunnel.StartKeyboardAuth method, which begins keyboard-interactive
;  authentication.  The only argument is the login name.  It returns XML describing the server's
;  prompts, which are answered with ContinueKeyboardAuth.

$oTunnel = ObjCreate("Chilkat.SshTunnel")

;  The tunnel forwards accepted local connections to this destination through the SSH server.
$oTunnel.DestHostname = "db.internal.example.com"
$oTunnel.DestPort = 5432

;  Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
;  does not authenticate yet.
Local $iSshPort = 22
$bSuccess = $oTunnel.Connect("ssh.example.com",$iSshPort)
If ($bSuccess = False) Then
    ConsoleWrite($oTunnel.LastErrorText & @CRLF)
    Exit
EndIf

;  Begin keyboard-interactive authentication.  The returned XML describes the server's prompts.
Local $sInfoRequestXml = $oTunnel.StartKeyboardAuth("mySshLogin")
If ($oTunnel.LastMethodSuccess = False) Then
    ConsoleWrite($oTunnel.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($sInfoRequestXml & @CRLF)

;  Answer the prompt(s) with ContinueKeyboardAuth, then call BeginAccepting.

Local $bWaitForThreadExit = True
$bSuccess = $oTunnel.CloseTunnel($bWaitForThreadExit)
If ($bSuccess = False) Then
    ConsoleWrite($oTunnel.LastErrorText & @CRLF)
    Exit
EndIf