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.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

FreeBSD C++ Libraries

HP-UX C++ Libraries

BlackBerry QNX C++ Libraries

// Needs #include <CkFtp2.h>
// Needs #include <CkCertStore.h>
// Needs #include <CkCert.h>

    CkString strOut;

    CkFtp2 ftp;

    bool success;

    //  Any string unlocks the component for the 1st 30-days.
    success = ftp.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        strOut.append(ftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    ftp.put_Hostname("ftp.***.com");
    ftp.put_Port(21);
    ftp.put_Username("test");
    ftp.put_Password("test");

    //  This example will use explict TLS/SSL.
    //  Establish an explicit secure channel after connection
    //  on the standard FTP port 21.
    ftp.put_AuthTls(true);

    //  The Ssl property is for establishing an implicit SSL connection
    //  on port 990.  Because this example uses explicit SSL, it
    //  should remain false.
    ftp.put_Ssl(false);

    //  Load a certificate from a .pfx
    //  A PFX may contain several certs, including the certificates
    //  in a chain of authority.
    CkCertStore certStore;
    const char * password;
    password = "***";
    //  Load the certs from a PFX into an in-memory certificate store:
    success = certStore.LoadPfxFile("chilkat.pfx",password);
    if (success != true) {
        strOut.append(certStore.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Find the exact cert we'll use:
    CkCert *cert = 0;
    cert = certStore.FindCertBySubject("Chilkat Software, Inc.");
    if (cert == 0 ) {
        strOut.append("Certificate not found!");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Use this certificate for our secure (SSL/TLS) connection:
    ftp.SetSslClientCert(*cert);
    delete cert;

    //  Connect and login to the FTP server.  The connection is
    //  made secure because of the AuthTls setting.
    success = ftp.Connect();
    if (success != true) {
        strOut.append(ftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }
    else {
        //  LastErrorText contains information even when
        //  successful. This allows you to visually verify
        //  that the secure connection actually occurred.
        strOut.append(ftp.lastErrorText());
        strOut.append("\r\n");
    }

    strOut.append("Secure FTP Channel Established!\r\n");

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

    //  .....
    //  .....

    ftp.Disconnect();

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());