C

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

See more FTP Examples

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.

C

#include <C_CkFtp2.h>
#include <C_CkCertStore.h>
#include <C_CkJsonObject.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkFtp2 ftp;
    HCkCertStore certStore;
    HCkJsonObject jsonCN;
    HCkCert cert;

    success = FALSE;

    //  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
    //  

    ftp = CkFtp2_Create();

    CkFtp2_putHostname(ftp,"ftp.example.com");
    CkFtp2_putPort(ftp,21);
    CkFtp2_putUsername(ftp,"testLogin");
    CkFtp2_putPassword(ftp,"testPassword");

    //  This example will use explict TLS/SSL.
    //  Establish an explicit secure channel after connection
    //  on the standard FTP port 21.
    CkFtp2_putAuthTls(ftp,TRUE);

    //  The Ssl property is for establishing an implicit SSL connection
    //  on port 990.  Because this example uses explicit SSL, it 
    //  should remain FALSE.
    CkFtp2_putSsl(ftp,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.)
    certStore = CkCertStore_Create();
    //  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).
    success = CkCertStore_LoadPfxFile(certStore,"test.p12","secret");
    if (success != TRUE) {
        printf("%s\n",CkCertStore_lastErrorText(certStore));
        CkFtp2_Dispose(ftp);
        CkCertStore_Dispose(certStore);
        return;
    }

    jsonCN = CkJsonObject_Create();
    CkJsonObject_UpdateString(jsonCN,"CN","cert common name");

    cert = CkCert_Create();
    success = CkCertStore_FindCert(certStore,jsonCN,cert);
    if (success == FALSE) {
        printf("%s\n",CkCertStore_lastErrorText(certStore));
        CkFtp2_Dispose(ftp);
        CkCertStore_Dispose(certStore);
        CkJsonObject_Dispose(jsonCN);
        CkCert_Dispose(cert);
        return;
    }

    success = CkFtp2_SetSslClientCert(ftp,cert);

    //  Connect and login to the FTP server.
    success = CkFtp2_Connect(ftp);
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        CkCertStore_Dispose(certStore);
        CkJsonObject_Dispose(jsonCN);
        CkCert_Dispose(cert);
        return;
    }
    else {
        //  LastErrorText contains information even when
        //  successful. This allows you to visually verify
        //  that the secure connection actually occurred.
        printf("%s\n",CkFtp2_lastErrorText(ftp));
    }

    printf("Secure FTP Channel Established!\n");
    printf("%s\n",CkFtp2_lastErrorText(ftp));

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

    //  ...
    //  ...

    success = CkFtp2_Disconnect(ftp);


    CkFtp2_Dispose(ftp);
    CkCertStore_Dispose(certStore);
    CkJsonObject_Dispose(jsonCN);
    CkCert_Dispose(cert);

    }