Is Stunnel a good solution for using openssl? Are the better solutions than Stunnel to create my .pem files?

What are you trying to create/convert in PEM format? If you want to use openssl to generate a self signed certificate in pem format: 1. generate a private/public keys pair: openssl genrsa -out privkey.pem 1024 2. create a self signed certificate : openssl req -new -x509 -key privkey.pem -out cert.pem -days 1095 If you want to convert existing certificate to pem format: from pfx to pem: openssl pkcs12 -in cert.pfx -out cert.pem –nodes from der to pem: openssl x509 –in input.crt –inform DER –out output.crt –outform PEM /Hasain