openssl pkcs8 -in rsa_private_key_pkcs8.pem -nocrypt -out pri_key.pkcs1
openssl rsa -in pri_key.pkcs1 -pubout -out pub.key
openssl req -new -x509 -key pri_key.pkcs1 -out pri.cer -days 3650
openssl pkcs12 -export -out pri.pfx -inkey pri_key.pkcs1 -in pri.cer