Visual FoxPro

SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

Visual FoxPro

LOCAL lnSuccess
LOCAL loJson
LOCAL loCrypt
LOCAL loSsLogin
LOCAL loSsPassword
LOCAL loSftp

lnSuccess = 0

* This example requires the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

* Imagine we've previously saved our encrypted login and password within a JSON config file
* that contains this:

* {
*   "ssh_login": "2+qylFfC56Ck7OQQt/U2/w==",
*   "ssh_password": "5neIq9Jmn0E3p71N6Yc8TA=="
* }

loJson = CreateObject('Chilkat.JsonObject')
loJson.LoadFile("qa_data/passwords/ssh.json")

loCrypt = CreateObject('Chilkat.Crypt2')

* These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
loCrypt.CryptAlgorithm = "aes"
loCrypt.CipherMode = "cbc"
loCrypt.KeyLength = 128
loCrypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F","hex")
loCrypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex")
loCrypt.EncodingMode = "base64"

loSsLogin = CreateObject('Chilkat.SecureString')
loSsPassword = CreateObject('Chilkat.SecureString')

* Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
* a randomly generated session key.)
loCrypt.DecryptSecureENC(loJson.StringOf("ssh_login"),loSsLogin)
loCrypt.DecryptSecureENC(loJson.StringOf("ssh_password"),loSsPassword)

loSftp = CreateObject('Chilkat.SFtp')

lnSuccess = loSftp.Connect("MY-SSH-SERVER-DOMAIN-OR-IP",22)
IF (lnSuccess <> 1) THEN
    ? loSftp.LastErrorText
    RELEASE loJson
    RELEASE loCrypt
    RELEASE loSsLogin
    RELEASE loSsPassword
    RELEASE loSftp
    CANCEL
ENDIF

* Authenticate using secure strings
lnSuccess = loSftp.AuthenticateSecPw(loSsLogin,loSsPassword)
IF (lnSuccess <> 1) THEN
    ? loSftp.LastErrorText
    RELEASE loJson
    RELEASE loCrypt
    RELEASE loSsLogin
    RELEASE loSsPassword
    RELEASE loSftp
    CANCEL
ENDIF

? "SFTP Authentication successful."

loSftp.Disconnect()

RELEASE loJson
RELEASE loCrypt
RELEASE loSsLogin
RELEASE loSsPassword
RELEASE loSftp