Timestamp always uses SHA256 for hashing algorithm and ignores adobe sHashAlgo settings

[Pavel27664432ftuc]

I have Adobe Acrobat Reader 22.003.20282 and trying to set SHA512 hash algorithm for timestamps in Adobe Reader. According to the documentation I've tried to set the sHashAlgo (hashing algorithm OID used to hash the data to be timestamped) registry settings in HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\DC\Security\cASPKI\cAdobe_TSPProvider
For SHA512 I filled the sHashAlgo with string value 2.16.840.1.101.3.4.2.3

Problem is that if I set 2.16.840.1.101.3.4.2.3 in sHashAlgo the timestamp request from Adobe always contains SHA256 (OID 2.16.840.1.101.3.4.2.1) in messageImprint hashAlgorithm and not SHA512.
Appreciate any help,
Pavel

[Bernd Alheit]

Try the forum for Acrobat Reader.