Lianja

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.

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llSuccess = .F.

//  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("CkSFtp")

//  Step 1: Connect the SSH transport.  Port 22 is the usual port.
lnPort = 22
llSuccess = loSftp.Connect("sftp.example.com",lnPort)
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    return
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("CkSecureString")
loSecureLogin.Append("mySshLogin")
loSecurePassword = createobject("CkSecureString")
loSecurePassword.Append(lcPassword)

llSuccess = loSftp.AuthenticateSecPw(loSecureLogin,loSecurePassword)
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    release loSecureLogin
    release loSecurePassword
    return
endif

//  Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
//  file or directory operations.
llSuccess = loSftp.InitializeSftp()
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loSftp
    release loSecureLogin
    release loSecurePassword
    return
endif

? "Authenticated with secure strings."

loSftp.Disconnect()


release loSftp
release loSecureLogin
release loSecurePassword