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Upgrade an FTP Control Channel to TLS (ConvertToTls)

Demonstrates the Chilkat Ftp2.ConvertToTls method, which upgrades an already-connected clear FTP control channel to explicit TLS. It takes no arguments and is used with a manually staged connection created by ConnectOnly while Ssl is disabled.

Background: This exposes the explicit-FTPS AUTH TLS upgrade as a discrete step for the rare case where you need to do something on the clear connection first — inspect the greeting, apply a workaround — before securing it. In the normal case you simply set AuthTls and let Connect perform the upgrade automatically; this manual path exists for staged control.

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Local $bSuccess = False

;  Demonstrates the Ftp2.ConvertToTls method, which upgrades an already-connected clear FTP control
;  channel to explicit TLS.  It takes no arguments.  It is used with a manually staged connection
;  created by ConnectOnly while Ssl is disabled.

$oFtp = ObjCreate("Chilkat.Ftp2")

$oFtp.Hostname = "ftp.example.com"
$oFtp.Port = 21

;  Connect in clear text first (Ssl is false).
$bSuccess = $oFtp.ConnectOnly()
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf

;  Upgrade the control channel to explicit TLS (AUTH TLS).
$bSuccess = $oFtp.ConvertToTls()
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf

;  Now authenticate over the encrypted control channel.
$oFtp.Username = "myFtpLogin"
$oFtp.Password = "myPassword"
$bSuccess = $oFtp.LoginAfterConnectOnly()
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Control channel upgraded to TLS and logged in." & @CRLF)

$bSuccess = $oFtp.Disconnect()
If ($bSuccess = False) Then
    ConsoleWrite($oFtp.LastErrorText & @CRLF)
    Exit
EndIf