@echo off
if "%3" == "" goto show_usage
openssl pkcs12 -nodes -nocerts -in %1 -out private.pem -passin pass:""
openssl dgst -sha256 -sign private.pem -out signature.bin %2
copy /b %2 + signature.bin %3
del private.pem
del signature.bin
goto done
:show_usage
echo Usage: Pkcs1Sign PfxFile InputFile SignedFile
:done