How to read a certificate by activity?

Hello, hope you can help me. I want to read a file of type .cer, .der and .crt. Which activities are usable for this? Windows opens the file with the crypto shell extension. What are the possibilities to read the details?

You can open the certificate file with Start Process, use Click to switch to the Details tab and then Get Text to read the details. Set the scraping method for Get Text to Fulltext. The result is a tab separated text, that you can parse with e.g. the Generate Data Table From Text activity.