(PowerBuilder) Secure FTP with Client Certificate

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one.

Note: This example requires Chilkat v10.1.2 or greater.

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

integer li_rc
oleobject loo_Ftp
oleobject loo_CertStore
string ls_Password
integer li_Success
oleobject loo_JsonCN
oleobject loo_Cert

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

loo_Ftp = create oleobject
// Use "Chilkat_9_5_0.Ftp2" for versions of Chilkat < 10.0.0
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.example.com"
loo_Ftp.Port = 21
loo_Ftp.Username = "test"
loo_Ftp.Password = "test"

// This example will use explict TLS/SSL.
// Establish an explicit secure channel after connection
// on the standard FTP port 21.
loo_Ftp.AuthTls = 1

// The Ssl property is for establishing an implicit SSL connection
// on port 990.  Because this example uses explicit SSL, it 
// should remain 0.
loo_Ftp.Ssl = 0

// Load a certificate from a .pfx
// A PFX may contain several certs, including the certificates
// in a chain of authority.
loo_CertStore = create oleobject
// Use "Chilkat_9_5_0.CertStore" for versions of Chilkat < 10.0.0
li_rc = loo_CertStore.ConnectToNewObject("Chilkat.CertStore")

ls_Password = "***"
// Load the certs from a PFX into an in-memory certificate store:
li_Success = loo_CertStore.LoadPfxFile("chilkat.pfx",ls_Password)
if li_Success <> 1 then
    Write-Debug loo_CertStore.LastErrorText
    destroy loo_Ftp
    destroy loo_CertStore
    return
end if

// Find the desired certificate.
loo_JsonCN = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_JsonCN.ConnectToNewObject("Chilkat.JsonObject")

loo_JsonCN.UpdateString("CN","cert common name")

loo_Cert = create oleobject
// Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_CertStore.FindCert(loo_JsonCN,loo_Cert)
if li_Success = 0 then
    Write-Debug "Certificate not found!"
    destroy loo_Ftp
    destroy loo_CertStore
    destroy loo_JsonCN
    destroy loo_Cert
    return
end if

// Use this certificate for our secure (SSL/TLS) connection:
li_Success = loo_Ftp.SetSslClientCert(loo_Cert)

// Connect and login to the FTP server.  The connection is 
// made secure because of the AuthTls setting.
li_Success = loo_Ftp.Connect()
if li_Success <> 1 then
    Write-Debug loo_Ftp.LastErrorText
    destroy loo_Ftp
    destroy loo_CertStore
    destroy loo_JsonCN
    destroy loo_Cert
    return
else
    // LastErrorText contains information even when
    // successful. This allows you to visually verify
    // that the secure connection actually occurred.
    Write-Debug loo_Ftp.LastErrorText
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_CertStore
destroy loo_JsonCN
destroy loo_Cert