(VB.NET UWP/WinRT) 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 Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

Dim cert As New Chilkat.Cert
Dim privKey As New Chilkat.PrivateKey

'  Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
Dim success As Boolean = cert.LoadFromFile("qa_data/certs/sample_cert_a.cer")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


'  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")
If (success <> True) Then
    Debug.WriteLine(privKey.LastErrorText)
    Exit Sub
End If


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

'  Or get the PEM string directly...
Debug.WriteLine(cert.ExportCertPem())

'  Associate the private key with the cert object.
success = cert.SetPrivateKey(privKey)
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


'  Write the cert + private key to a .pfx file.
success = cert.ExportToPfxFile("qa_data/myPfx.pfx","password",True)
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")