Visual FoxPro

SFTP Authenticate with a SecureString Password

Demonstrates the Chilkat SFtp.AuthenticateSecPw method, which authenticates using SecureString login and password objects. The first argument is the login and the second is the password.

Background: A SecureString keeps the credential encrypted in memory, reducing the chance of a plaintext password lingering in the process. The behavior otherwise matches AuthenticatePw; only the credential handling is more protective. Populate the SecureString from a value obtained at runtime, not a hard-coded literal.

Chilkat Visual FoxPro Downloads

Download Chilkat for Visual FoxPro

Visual FoxPro

LOCAL lnSuccess
LOCAL loSftp
LOCAL lnPort
LOCAL lcPassword
LOCAL loSecureLogin
LOCAL loSecurePassword

lnSuccess = 0

*  Demonstrates the SFtp.AuthenticateSecPw method, which authenticates using SecureString login
*  and password objects.  The 1st argument is the login and the 2nd is the password.

loSftp = CreateObject('Chilkat.SFtp')

*  Step 1: Connect the SSH transport.  Port 22 is the usual port.
lnPort = 22
lnSuccess = loSftp.Connect("sftp.example.com",lnPort)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    CANCEL
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.
lcPassword = "mySshPassword"

*  Place the login and password into SecureString objects.
loSecureLogin = CreateObject('Chilkat.SecureString')
loSecureLogin.Append("mySshLogin")
loSecurePassword = CreateObject('Chilkat.SecureString')
loSecurePassword.Append(lcPassword)

lnSuccess = loSftp.AuthenticateSecPw(loSecureLogin,loSecurePassword)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    RELEASE loSecureLogin
    RELEASE loSecurePassword
    CANCEL
ENDIF

*  Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
*  file or directory operations.
lnSuccess = loSftp.InitializeSftp()
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loSftp
    RELEASE loSecureLogin
    RELEASE loSecurePassword
    CANCEL
ENDIF

? "Authenticated with secure strings."

loSftp.Disconnect()

RELEASE loSftp
RELEASE loSecureLogin
RELEASE loSecurePassword