PowerBuilder

Verify FTP SSL Server Certificate

See more FTP Examples

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. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Ftp
oleobject loo_Cert

li_Success = 0

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Ftp = create oleobject
li_rc = loo_Ftp.ConnectToNewObject("Chilkat.Ftp2")
if li_rc < 0 then
    destroy loo_Ftp
    MessageBox("Error","Connecting to COM object failed")
    return
end if

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

// Establish an AUTH SSL secure channel after connection
// on the standard FTP port 21.
loo_Ftp.AuthSsl = 1

// The Ssl property is for establishing an implicit SSL connection
// on port 990.  Do not set it.
loo_Ftp.Ssl = 0

// 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:
loo_Ftp.RequireSslCertVerify = 1

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

// Connect and login to the FTP server.
li_Success = loo_Ftp.Connect()
if li_Success = 0 then
    Write-Debug loo_Ftp.LastErrorText
    destroy loo_Ftp
    return
end if

// After logging on, you may examine the FTP server's cert:
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Ftp.GetServerCert(loo_Cert)
if li_Success = 0 then
    Write-Debug "No server certificate!"
else
    // Display the distinguished name of the SSL cert.
    Write-Debug loo_Cert.SubjectDN
end if

Write-Debug "Secure FTP Channel Established!"

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

li_Success = loo_Ftp.Disconnect()


destroy loo_Ftp
destroy loo_Cert