How to implement email signing documents on the site?

Question

1C-Bitrix

Good afternoon!
Tell me how it is possible to implement this:

There is a site on 1C-Bitrix.
The task is to make in the personal account the possibility of signing EDS documents by the client after passing the approval of certain stages and the EDS by the contractor. Tell me how this can be implemented, maybe there are modules?

Answer 1

There are no normal modules. There is allegedly an electronic document management from CryptoARM, but I could not get it to work normally, plus an extra layer is added on top of CryptoPro. And if CryptoPro is for everyone who uses EDS, then CryptoARM is not so common and customers will have to install it.
It is implemented on its own using the CryptoPro EDS Browser Plugin, there is a cades js library for interacting with CryptoPro and signing documents, etc. But the problem is that signing is half the battle, on the server you need to check the signature and verify it, otherwise you can easily sign not with your own signature or not qualified (qualified = legally significant). To do this, you need to install the CryptoPro SDK on the server and patch php 7 to add the cades library to php, which will just allow you to work with EDS on the server, verify signatures, etc. etc.
All this is in the CryptoPro documentation here https://docs.cryptopro.ru/cades/

Answer 2

The SDK must issue a center that certifies these very digital signatures. And with it, instructions for connecting.