AutoIt

SFTP Authenticate with a SecureString Password and Private Key

Demonstrates the Chilkat SFtp.AuthenticateSecPwPk method, which authenticates using SecureString login and password objects together with a private key. The third argument is the SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: This is the SecureString form of two-factor SFTP authentication: the password is held encrypted in memory and combined with a private key for servers that require both. It is the most protective option when a deployment mandates two-factor SSH and you also want to minimize plaintext credential exposure in the process.

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Local $bSuccess = False

;  Demonstrates the SFtp.AuthenticateSecPwPk method, which authenticates using SecureString login
;  and password objects together with a private key.  The 1st argument is the username, the 2nd
;  is the password, and the 3rd is an SshKey private key.

$oSftp = ObjCreate("Chilkat.SFtp")

;  Step 1: Connect the SSH transport.  Port 22 is the usual port.
Local $iPort = 22
$bSuccess = $oSftp.Connect("sftp.example.com",$iPort)
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

;  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.
Local $sPassword = "mySshPassword"

;  Load the SSH private key.  LoadText reads the file's text, which is then imported.
$oPrivKey = ObjCreate("Chilkat.SshKey")
Local $sKeyText = $oPrivKey.LoadText("qa_data/id_rsa")
If ($oPrivKey.LastMethodSuccess = False) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oPrivKey.FromOpenSshPrivateKey($sKeyText)
If ($bSuccess = False) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

;  Place the login and password into SecureString objects.
$oSecureLogin = ObjCreate("Chilkat.SecureString")
$oSecureLogin.Append("mySshLogin")
$oSecurePassword = ObjCreate("Chilkat.SecureString")
$oSecurePassword.Append($sPassword)

$bSuccess = $oSftp.AuthenticateSecPwPk($oSecureLogin,$oSecurePassword,$oPrivKey)
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

;  Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
;  file or directory operations.
$bSuccess = $oSftp.InitializeSftp()
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Authenticated." & @CRLF)

$oSftp.Disconnect