Visual Basic 6.0

Set an FTPS Client Certificate from a PFX File

Demonstrates the Chilkat Ftp2.SetSslClientCertPfx method, which loads a client certificate and private key from a PFX/P12 file. The first argument is the file path and the second is its password.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: A PFX (PKCS #12) file bundles a certificate with its private key in one password-protected file — the format Windows and many corporate PKI tools export. This is the counterpart to SetSslClientCertPem for mutual-TLS authentication when your credentials are packaged as a single .pfx. Set it before connecting.

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Visual Basic 6.0

Dim success As Long
success = 0

'  Demonstrates the Ftp2.SetSslClientCertPfx method, which loads a client certificate and private
'  key from a PFX/P12 file.  The 1st argument is the PFX file path and the 2nd is its password.

Dim ftp As New ChilkatFtp2

ftp.Hostname = "ftp.example.com"
ftp.Username = "myFtpLogin"

'  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.
ftp.Password = "myPassword"

'  Use explicit FTPS (AUTH TLS) on the standard FTP port.
ftp.AuthTls = 1

'  Provide the PFX client certificate before connecting.  The password should come from a secure
'  source rather than being hard-coded.
Dim pfxPassword As String
pfxPassword = "myPfxPassword"
success = ftp.SetSslClientCertPfx("qa_data/client.pfx",pfxPassword)
If (success = 0) Then
    Debug.Print ftp.LastErrorText
    Exit Sub
End If

success = ftp.Connect()
If (success = 0) Then
    Debug.Print ftp.LastErrorText
    Exit Sub
End If

Debug.Print "Connected with a PFX client certificate."

success = ftp.Disconnect()
If (success = 0) Then
    Debug.Print ftp.LastErrorText
    Exit Sub
End If