Generate RSA private key
1、openssl genrsa -out rsa_private_key.pem 1024
Convert RSA private key into PKCS8 format
2、openssl pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -out PEM -nocrypt
Generate RSA public key
3、openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
Now the RSA key pair is available
