Generate a Public and Private Key Pair

• Generate a keystore with private key

keytool -genkey -v -alias YOUR_ALIAS>'' -keyalg EC -sigalg SHA256withECDSA -deststoretype pkcs12 -keystore <FILE_NAME>.jks -dname "CN=xxx,OU=xxx,O=xxx,L=xxx,ST=xxx,C=CN" -validity 365 -storepass <YOUR_PASSWORD> -keypass <YOUR_PASSWORD>

• Export the certificate corresponding to the private key

keytool -export -alias <YOUR_ALIAS> -keystore <FILE_NAME>.jks -storepass <YOUR_PASSWORD> -rfc -file <FILE_NAME>.cer

• Extract the public key from the certificate

openssl x509 -in <FILE_NAME>.cer -pubkey -noout > <FILE_NAME>.pem