B4X

SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

B4X

Dim success As Boolean = False

'  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=="
'  }

Dim json As ChilkatJsonObject
json.Initialize
json.LoadFile("qa_data/passwords/ssh.json")

Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

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

Dim ssLogin As ChilkatSecureString
ssLogin.Initialize
Dim ssPassword As ChilkatSecureString
ssPassword.Initialize

'  Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
'  a randomly generated session key.)
crypt.DecryptSecureENC(json.StringOf("ssh_login"), ssLogin)
crypt.DecryptSecureENC(json.StringOf("ssh_password"), ssPassword)

Dim sftp As ChilkatSFtp
sftp.Initialize("sftp")

success = sftp.Connect("MY-SSH-SERVER-DOMAIN-OR-IP", 22)
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  Authenticate using secure strings
success = sftp.AuthenticateSecPw(ssLogin, ssPassword)
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


Log("SFTP Authentication successful.")

sftp.Disconnect