How to get information about the signature of a document in docx or pdf format?

Question

Python

Question: How can I get signature details (Subject, Publisher, Validity) for a document in docx and pdf format in the simplest way? Preferably using libraries in Python 3.X (other languages ​​are also allowed).

Description of the problem: I looked at many libraries, but did not find a normal stable method that can pull signature information from a signed docx document. I considered the product of the CryptoPro company (CryptoPro SVS 2.0), their price bites a lot, especially when scaling to many servers.
CryptoPro has a demo page for obtaining signature data ( https://dss.cryptopro.ru/Verify/Verify/ ), which displays the result when a signed document is loaded:

Ideally, receive similar data on the content of the document.

Additionally: I'm trying to gradually dive into the topic, I really welcome leading questions.
Server Configuration: Ubuntu 18.04, Python 3.7
Using System.IO.Packaging.PackageDigitalSignatureManager is not possible for Net Core

Answer 1

since other languages ​​are allowed
https://stackoverflow.com/questions/28106331/digit...