CreateMQTT.txt

https://www.survivingwithandroid.com/2016/10/mqtt-protocol-tutorial.html
openssl genrsa -out mosq-ca.key 2048
openssl req -new -x509 -days 365 -key mosq-ca.key -out mosq-ca.crt
openssl genrsa -out mosq-serv.key 2048
openssl req -new -key mosq-serv.key -out mosq-serv.csr
openssl x509 -req -in mosq-serv.csr -CA mosq-ca.crt -CAkey mosq-ca.key -CAcreateserial -out mosq-serv.crt -days 365 -sha256
openssl x509 -in mosq-serv.crt -noout -text
Mosquitto.conf
listener 8883
cafile /home/pi/ssl-cert-mosq/mosq-ca.crt
certfile /home/pi/ssl-cert-mosq/mosq-serv.crt
keyfile /home/pi/ssl-cert-mosq/mosq-serv.key
mosquitto_pub -p 8883 -t "test" -cafile mosq-ca.crt -m "Hello MQTT" -d -h 192.168.1.8

https://dzone.com/articles/introduction-to-security-and-tls?fromrel=true
https://dzone.com/articles/secure-communication-with-tls-and-the-mosquitto-broker?fromrel=true
openssl genrsa -des3 -out m2mqtt_ca.key 2048
openssl req -new -x509 -days 3650 -key m2mqtt_ca.key -out m2mqtt_ca.crt
openssl genrsa -out m2mqtt_srv.key 2048
openssl req -new -key m2mqtt_srv.key -out m2mqtt_srv.csr 
openssl x509 -req -in m2mqtt_srv.csr -CA m2mqtt_ca.crt -CAkey m2mqtt_ca.key -CAcreateserial -out m2mqtt_srv.crt -days 3650

cafile C:\Program Files (x86)\mosquitto\certs\m2mqtt_ca.crt
certfile C:\Program Files (x86)\mosquitto\certs\m2mqtt_srv.crt
keyfile C:\Program Files (x86)\mosquitto\certs\m2mqtt_srv.key