(MFC) Using WS_FTP Self-signed Certificate file (.crt) and Private Key File. (.key)

Demonstrates how to use a self-signed certificate created by WS_FTP with Chilkat FTP2.

Note: It is usually not necessary for the FTP client to use a client-side certificate. Most FTP servers using SSL and TLS connections (explicit or implicit) do not require client-side certs. In addition, some high-security FTP servers require "real" certificates -- meaning certificates issued by a real certificate authority with a chain of authentication that leads to a trusted root certificate. The certificates created by WS_FTP are self-signed and untrusted.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

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

void ChilkatSample(void)
    {
    CkString strOut;

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

    // Important:  Before running this program, convert your
    // .crt and .key files to a .p12 using OpenSSL:
    // The command is this:
    // openssl pkcs12 -export -in test.crt -inkey test.key -out test.p12
    // 

    CkFtp2 ftp;

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

    // 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);

    // Create an instance of a certificate store object, load a .p12 file,
    // locate the certificate we need, and use it for signing.
    // (a P12/PFX file may contain more than one certificate.)
    CkCertStore certStore;
    // The 1st argument is the filename, the 2nd arg is the 
    // .p12 file's password.  (OpenSSL will prompty you to set a password
    // when converting the .crt and .key into a .p12).
    bool success = certStore.LoadPfxFile("test.p12","secret");
    if (success != true) {
        strOut.append(certStore.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkCert *cert = certStore.FindCertBySubjectCN("Your cert's common name");
    if (certStore.get_LastMethodSuccess() == false) {
        strOut.append(certStore.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    success = ftp.SetSslClientCert(*cert);

    delete cert;

    // Connect and login to the FTP server.
    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!");
    strOut.append("\r\n");
    strOut.append(ftp.lastErrorText());
    strOut.append("\r\n");

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

    // ...
    // ...

    success = ftp.Disconnect();


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }