Converting Private Key
// Convert Private RSA Key PEM
openssl pkcs12 -in {pfx_file_name}.pfx -nocerts -nodes -passin pass:{password} | openssl rsa -out privkey.pem
// Convert Private RSA Key to Private PEM
openssl pkcs8 -topk8 -inform PEM -in privkey.pem -outform PEM -nocrypt > private.pem
Converting Public Certificate Pem
openssl pkcs12 -in {pfx_file_name}.pfx -clcerts -nokeys -passin pass:{password} -out publicCert.pem
Convert to Public Key
openssl pkcs12 -in {pfx_file_name}.pfx -clcerts -nokeys -passin pass:{password} | openssl x509 -pubkey -noout | ssh-keygen -f /dev/stdin -i -m PKCS8 > public_key
An alternative way
// Exports all keys
openssl pkcs12 -in {pfx_file_name}.pfx -nocerts -nodes -passin pass:{password} -out exported.key
// Export Private RSA Key PEM
openssl rsa -in exported.key -out privkey.pem
// Convert Private RSA Key to Private PEM
openssl pkcs8 -topk8 -inform PEM -in privkey.pem -outform PEM -nocrypt > private.pem
// Export Public key
openssl rsa -in exported.key -pubout -out publicCert.pem