openssl req -newkey rsa:2048 -keyout name.key -out name.csr
openssl rsa -in name.key -out name.rsa
openssl pkcs12 -export -in name.crt -out name.p12 -inkey name.key
openssl pkcs12 -in name.pfx -out name.crt
Convert your files into PEM format
The private key: if it not in PEM format, use the following command line to convert it:
openssl rsa -in private-key-name -outform PEM
Your certificate: if it not in PEM format, use the following command line to convert it:
openssl x509 -inform PEM -in your-certificate
The certification chain: if it not in PEM format, use the following command line to convert it:
openssl x509 -inform PEM -in certification-chain-file-name