Visual Basic 6.0

Set an FTPS Client Certificate from PEM

Demonstrates the Chilkat Ftp2.SetSslClientCertPem method, which configures a client certificate and private key from PEM. The first argument may be the PEM text or a PEM file path, and the second is the private-key password (empty when the key is not encrypted).

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: This is the PEM-based form of setting the mutual-TLS client certificate — convenient when the certificate and key already live in a .pem file, the common format from OpenSSH and Unix tooling. Use SetSslClientCertPfx instead for a PKCS#12 .pfx/.p12 bundle. As with any client certificate, set it before connecting.

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Visual Basic 6.0

Dim success As Long
success = 0

'  Demonstrates the Ftp2.SetSslClientCertPem method, which configures a client certificate and
'  private key from PEM.  The 1st argument is the PEM text or a PEM file path, and the 2nd is the
'  private-key password (empty when the key is not encrypted).

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 PEM client certificate before connecting.  The password should come from a secure
'  source rather than being hard-coded.
Dim pemPassword As String
pemPassword = "myPemPassword"
success = ftp.SetSslClientCertPem("qa_data/client.pem",pemPassword)
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 PEM client certificate."

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