Convert your .PFX (p12) certificate to a .pvk + .spc combination.

Install OpenSSL.

1) Extract your private key from the PFX file.

->openssl pkcs12 -in (pfx-file) -nocerts -nodes -out (pem-key-file)

The PFX password will be asked.



Download the PVK transform utility.

-> pvk -in(pem-key-file) -topvk -out (pvk-file)



2)Extract your certificates from the PFX file.

-> openssl pkcs12 -in (pfx-file) -nokeys -out (pem-certs-file).

The PFX password will be asked.



Transform your PEM file to a SPC file.

-> openssl crl2pkcs7 -nocrl -certfile (pem-certs-file) -outform DER -out (spc-file)



Below is the screenshot of all the files involved in the above process.