(VBScript) FTP Connect, Examine Server Certificate, and then Authenticate

Demonstrates how to connect to an FTP server, examine the server's SSL/TLS certificate, and then, if it meets the application's security requirements, proceed to authenticate.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' This example assumes Chilkat Ftp2 to have been previously unlocked.
' See Unlock Ftp2 for sample code.

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Ftp2")
set ftp = CreateObject("Chilkat.Ftp2")

ftp.Hostname = "www.authtls-ftps-server.com"
ftp.Username = "FTP_LOGIN"
ftp.Password = "FTP_PASSWORD"
ftp.AuthTls = 1
ftp.Port = 21

' Connect to the FTP server using explicit TLS (AUTH TLS).
success = ftp.ConnectOnly()
If (success <> 1) Then
    outFile.WriteLine(ftp.LastErrorText)
    WScript.Quit
End If

' Get the FTP server's certificate.
' serverCert is a Chilkat.Cert
Set serverCert = ftp.GetSslServerCert()
If (ftp.LastMethodSuccess <> 1) Then
    outFile.WriteLine(ftp.LastErrorText)
    WScript.Quit
End If

' Now that we have the certificate, we can check it in any way we desire.
' (See the online reference documentation for the certificate object's methods
' and properties)...

' Assuming the certificate is OK, proceed to authenticate with the FTP server.
success = ftp.LoginAfterConnectOnly()
If (success <> 1) Then
    outFile.WriteLine(ftp.LastErrorText)
    WScript.Quit
End If

' 
' Proceed with uploading/download files, etc...
' 

success = ftp.Disconnect()
outFile.WriteLine("Success.")

outFile.Close