openssl pkcs12 -export -inkey a.key -in a.pem -out a.pfx
openssl x509 -inform der -in a.cer -out a.pem
openssl req -x509 -newkey rsa:4096 -keyout a.key -out a.pem -days 365
openssl pkcs12 -export -inkey a.key -in a.pem -out a.pfx
openssl x509 -inform der -in a.cer -out a.pem
openssl req -x509 -newkey rsa:4096 -keyout a.key -out a.pem -days 365