- Create key and cert
openssl req -x509 -newkey rsa:2048 -keyout mykey.pem -out cert.pem -days 365
or
openssl req -x509 -newkey rsa:2048 -keyout mykey.pem -out cert.pem -days 365 -nodes
- make .p12 from key and cert
openssl pkcs12 -export -out identity.p12 -inkey mykey.pem -in cert.pem