(Swift 3,4,5...) Convert Cert + Key to PEM and PFX

This example is based on the following question from a Chilkat customer:

We receive 2 files :

    MyCertificate.p7b
    MyCertificate-privatekey.pkey

We have to transform these certificate like this:

First convert it to PEM like this:

openssl pkcs7 -in MyCertificate.p7b -inform DER -out MyCertificate.pem -print_certs

Now we get MyCertificate.pem

Last step, we need to convert it to pfx file:

openssl pkcs12 -export -inkey moncertificat-privatekey.pkey  -in  moncertificat.pem -out moncertificat.pfx

Is there a way to make all these steps with Chilkat ?

I will be nice to include this directly in our software instead of askig the user to do it manualy.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    let cert = CkoCert()!
    let privKey = CkoPrivateKey()!

    // Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
    var success: Bool = cert.load(fromFile: "qa_data/certs/sample_cert_a.cer")
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    // Load the private key.
    // (The various privKey methods that load from a file will automatically detect
    // the format.  It doesn't actually matter if you try to load a non-PKCS8 format private key
    // by calling LoadPkcs8EncryptedFile -- internally Chilkat will detect the format and will load
    // based on what it finds.)
    success = privKey.loadPkcs8EncryptedFile("qa_data/certs/sample_key_a.pkcs8", password: "password")
    if success != true {
        print("\(privKey.lastErrorText!)")
        return
    }

    // Write the cert as PEM.
    success = cert.exportPemFile("qa_output/cert.pem")

    // Or get the PEM string directly...
    print("\(cert.exportPem()!)")

    // Associate the private key with the cert object.
    success = cert.setPrivateKey(privKey)
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    // Write the cert + private key to a .pfx file.
    success = cert.export(toPfxFile: "qa_data/myPfx.pfx", pfxPassword: "password", bIncludeCertChain: true)
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    print("Success.")

}