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(C++) 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.

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

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

    CkFtp2 ftp;

    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 = 0;
    password = "***";
    // Load the certs from a PFX into an in-memory certificate store:
    bool success = certStore.LoadPfxFile("chilkat.pfx",password);
    if (success != true) {
        std::cout << certStore.lastErrorText() << "\r\n";
        return;
    }

    // Find the exact cert we'll use:
    CkCert *cert = 0;
    cert = certStore.FindCertBySubject("Chilkat Software, Inc.");
    if (certStore.get_LastMethodSuccess() == false) {
        std::cout << "Certificate not found!" << "\r\n";
        return;
    }

    // Use this certificate for our secure (SSL/TLS) connection:
    success = 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) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }
    else {
        // LastErrorText contains information even when
        // successful. This allows you to visually verify
        // that the secure connection actually occurred.
        std::cout << ftp.lastErrorText() << "\r\n";
    }

    std::cout << "Secure FTP Channel Established!" << "\r\n";

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

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

    success = ftp.Disconnect();
    }

 

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