生成dsa密钥对
openssl dsaparam -out dsa_params.pem 1024
openssl genpkey -paramfile dsa_params.pem -out dsa_private.key
openssl dsa -in dsa_private.key -pubout -out dsa_public.key
一句话命令
openssl req -x509 -newkey rsa:2048 -nodes -days 3650 \
-keyout selfsigned.key -out selfsigned.crt \
-subj "/CN=你的域名/O=自签证书/C=US"