Signing a usermode driver for a (virtual) printer

Pascal Loonen 6 Reputation points
2021-10-29T12:37:31.45+00:00

Hi,
I've taken my first steps in driver development, but i'm stuck with the signing part. I've created a virtual printer driver (there is no actual printer, just like a PDF printer). The driver is working in testmode, but now i want to install it on a customer pc. A couple of questions:

If i understand everything correctly, only kernel mode drivers need to be verified by Microsoft?

I have a Sectigo Code Signing certificate, if i select it as a file (.PFX) in Visual Studio 2019 as a "Production Certificate" there's an error: "Invalid certificate or password". No further information. The password is correct so there must be something wrong with the certificate, but i don't know what's wrong. I hope you can give me a direction. (if i import the certificate in the Trusted Publishers store and then in Visual Studio 2019 "Select from Store" the list is empty.)

Some thoughts of my own:
The certificate i have is a code signing certificate, NOT an EV code signing certificate. (the documentation only talks about that an EV is mandatory for kernel mode so i think that it is not needed for user mode, but maybe i'm wrong)?

I hope you can help me with this.

145034-cert.png

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