Chilkat Examples

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Xojo Plugin Examples


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(Xojo Plugin) Verify FTP SSL Server Certificate

This example demonstrates how to verify the FTP server's certificate and authenticity. The intent is to verify the authenticity of the server before passing a login/password to it.

Chilkat Xojo Plugin Download

Xojo Plugin for Windows, Linux, Mac OS X, and ARM

Dim ftp As New Chilkat.Ftp2

Dim success As Boolean

//  Any string unlocks the component for the 1st 30-days.
success = ftp.UnlockComponent("Anything for 30-day trial")
If (success <> True) Then
    System.DebugLog(ftp.LastErrorText)
    Return
End If

ftp.Hostname = "ftp.myftpserver.com"
ftp.Username = "myUsername"
ftp.Password = "myPassword"

//  Establish an AUTH SSL secure channel after connection
//  on the standard FTP port 21.
ftp.AuthSsl = True

//  The Ssl property is for establishing an implicit SSL connection
//  on port 990.  Do not set it.
ftp.Ssl = False

//  Indicate that the FTP server must have a verifiable SSL certificate.
//  Do not accept self-signed certs or certificates that are
//  expired, revoked, or cannot be verified to a root authority:
ftp.RequireSslCertVerify = True

//  You may also set a requirement.  In this example,
//  the certificate's Common Name (CN) must match the
//  required string exactly:
ftp.SetSslCertRequirement "subjectcn","Chilkat Software, Inc."

//  Connect and login to the FTP server.
success = ftp.Connect()
If (success <> True) Then
    System.DebugLog(ftp.LastErrorText)
    Return
Else
    //  LastErrorText contains information even when
    //  successful. This allows you to visually verify
    //  that the secure connection actually occurred.
    System.DebugLog(ftp.LastErrorText)
End If

//  After logging on, you may examine the FTP server's cert:
Dim cert As Chilkat.Cert
cert = ftp.GetSslServerCert()
If (cert Is Nil ) Then
    System.DebugLog("No server certificate!")
Else
    //  Display the distinguished name of the SSL cert.
    System.DebugLog(cert.SubjectDN)
End If

System.DebugLog("Secure FTP Channel Established!")

//  Do whatever you're doing to do ...
//  upload files, download files, etc...

success = ftp.Disconnect()

 

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