AutoIt

FTP over Implicit TLS (Ssl, AuthSsl, AutoFix)

Demonstrates the SSL/TLS connection-mode properties Ssl, AuthSsl, and AutoFix. Setting Ssl true selects implicit FTPS, in which TLS begins immediately after the TCP connection on port 990.

Background: FTP has two ways to add TLS: implicit (this example) starts encrypted from the first byte on a dedicated port, 990; explicit (via AuthTls) connects in the clear on port 21 and issues AUTH TLS to upgrade. Explicit is the modern standard; implicit persists mainly for legacy servers. AuthSsl is an obsolete AUTH SSL variant to avoid. AutoFix, on by default, infers the mode from the port — disable it when you set these properties explicitly so it does not override your choice.

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Local $bSuccess = False

$oFtp = ObjCreate("Chilkat.Ftp2")

$oFtp.Hostname = "ftp.example.com"
$oFtp.Username = "myFtpLogin"

;  Normally you would not hard-code the password in source.  You should instead obtain it
;  from an interactive prompt, environment variable, or a secrets vault.
$oFtp.Password = "myPassword"

;  Ssl = True selects IMPLICIT FTPS: TLS begins immediately after the TCP connection, before
;  the greeting.  Port 990 is conventional for implicit FTPS.  Ssl takes priority over AuthTls
;  and AuthSsl.
$oFtp.Ssl = True
$oFtp.Port = 990

;  AuthSsl selects the legacy AUTH SSL command and is very uncommon -- use AuthTls (explicit
;  FTPS) for modern servers instead.  Left False here.
$oFtp.AuthSsl = False

;  AutoFix (default True) automatically adjusts Ssl/AuthTls/AuthSsl based solely on the Port
;  (21 or 990).  Disable it when setting these properties explicitly, as here.
$oFtp.AutoFix = False

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

ConsoleWrite("Connected using implicit FTPS." & @CRLF)

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