Create a ts request as expected by the specification
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-cssp/6aac4dea-08ef-47a6-8747-22ea7f6d8685?redirectedfrom=MSDN
read ts validate
This is the last step in cssp handshake
Server must send its public key incremented by one
and cyphered with the authentication protocol
Parse the ts message and extract the public key