Solução encontrada em openssl.cnf
default_days = 1000 # how long to certify for
default_crl_days= 30 # how long before next CRL
default_md = default # use public key default MD
preserve = no # keep passed DN ordering
torne-se
default_days = 1000 # how long to certify for
default_crl_days= 30 # how long before next CRL
default_md = sha256 # use public key sha256
preserve = no # keep passed DN ordering
e, em seguida, trabalhe com
openssl req -nodes -sha256 -newkey rsa:2048 -subj "/C=IT/ST=Lazio/L=Roma/O=Blu/CN=server.server.server" -keyout ssl.key -out ssl.req -passout file:"/root/pass"