How to make authorization, signing documents through EDS?

Question

Electronic digital signature

Good afternoon!
We need a person who will be able to implement authorization / registration / digital signature
pki.gov.kz/index.php/ru/razrabotchikam
The site is developed in PHP.
Interested in those who have already done this work.
PS: I will be grateful for any suggestion and information on the topic.

Answer 1

Is it possible to authorize on the site using the digital signature?