C++

Duplicate openssl pkcs12 –export –in certfile.cer –inkey certfile.key –out certfile.pfx

See more OpenSSL Examples

How to create a PKCS12 (.p12 or .pfx) from a certificate file and private key file: Demonstrates how to duplicate this OpenSSL command:

Duplicate openssl pkcs12 –export –in certfile.cer –inkey certfile.key –out certfile.pfx

C++

#include <CkPrivateKey.h>
#include <CkCert.h>
#include <CkCertChain.h>
#include <CkPfx.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkPrivateKey pkey;

    // Load the private key from the file.
    success = pkey.LoadAnyFormatFile("certFile.key","");
    if (success != true) {
        std::cout << pkey.lastErrorText() << "\r\n";
        return;
    }

    CkCert cert;
    // The LoadFromFile method auto-recognizes the format...
    success = cert.LoadFromFile("certfile.cer");
    if (success != true) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    // We'll need a cert chain object to create the PKCS12, so get it
    // from the cert.  
    CkCertChain *certChain = 0;
    certChain = cert.GetCertChain();
    if (!cert.get_LastMethodSuccess()) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    // Create the PFX object, add the cert and private key, and write to a .pfx file.
    CkPfx pfx;

    // The cert(s) are automatically added in the call to AddPrivateKey
    success = pfx.AddPrivateKey(pkey,*certChain);
    if (success != true) {
        std::cout << pfx.lastErrorText() << "\r\n";
        return;
    }

    // Write the .pfx to a file.
    const char *password = "myPassword";
    success = pfx.ToFile(password,"certfile.pfx");
    if (success != true) {
        std::cout << pfx.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Success." << "\r\n";
    }