If you have Windows and an OpenSSL installation you can request a SHA256 certificate using the followin code:

set domein=YourDomain
set pass=YourPassword
set organisatie=YourOrganisation
set provincie=YourProviceorState
set stad=YourCity
set string="/CN=%domein%/O=%organisatie%/C=NL/ST=%provincie%/L=%stad%"
echo %string%
openssl genrsa -des3 -passout pass:%pass% 2048 > %domein%.key
openssl rsa -in %domein%.key -passin pass:%pass% -out %domein%-decrypted.key
openssl req –sha256 -new -key %domein%-decrypted.key -subj %string% -out %domein%.csr