Use oqsprovider with openssl on Windows

oqsprovider_windows.cmd

:: put below in your config, usually for Win64 : C:\Program Files\Common Files\SSL\openssl.cnf

[provider_sect]
default = default_sect
oqsprovider = oqsprovider_sect
[default_sect]
activate = 1
[oqsprovider_sect]
activate = 1

:: cmd as admin, not powershell :
set OPENSSL_MODULES=C:\ossl
:: copy oqsprovider.dll to ossl dir

openssl list -providers -verbose
:: verify it shows oqsprovider as active

:: show algos enabled, since not all are from the oqsprovider dll official release
openssl list -signature-algorithms -provider oqsprovider
openssl list -kem-algorithms -provider oqsprovider