I'm trying to purchase multiple certificates, some just signing, some just encrypting, and some a combination of the two. I wanted to purchase one signed by a CA, rather than using a self-signed one. I just want a file, so that I can easily integrate it with some software I've written and just call the command line to sign/encrypt files.
All the CA sites I've looked at are trying to sell it as a hardware package, with physical devices like USB drives, etc. Have I misunderstood what the CAs offer, or the whole process itself? I may be unaware of what the correct thing to google is, because the research I've tried to do on this hasn't cleared anything up.
An example site is GlobalSign, if I wanted to purchase a certificate for signing a document then the page I think I would want is here: https://www.globalsign.com/en/digital-signatures/
All the options available are hardware or SaaS.
Any help is appreciated, even just links to anything you think may help point me in the right direction. Thank you.
EDIT: It was suggested this is a duplicate of another issue. I believe it is different, because it has nothing to do with Adobe standards.
For example with signing, I want to be able to generate a PKCS7 key pair/certificate and then have a CA sign my certificate so that I can use these to share files. I have already generated the certificate, I have my own software that integrates the key for automated signing.