Fix digital signature library (C#)
There is a library for applying an electronic digital signature (EDS) according to DSTU-4145
file with a signing function
https://github.com/leon-mbs/DSTUSign/blob/main/Signer.cs
there is an issue with adding a timestamp from the TSP server
Actually, the code is there (line 190), without it everything works
some tax services require a TSP timestamp
If you look at the ASN.1 signature with a viewer, it looks fine.
At least the same as with a working similar function in PHP
https://github.com/leon-mbs/ppolib/blob/main/src/ppo.php
But the tax office rejects it with an error
It needs to be fixed
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