Self signed SSL certificate

openssl genrsa -out ca_private.key 4096

openssl req -new -key ca_private.key -out ca.csr

openssl x509 -req -in ca.csr -out ca.cer -signkey ca_private.key -CAcreateserial -days 3650

openssl genrsa -out server.key 4096

openssl req -new -key server.key -out server.csr

openssl x509 -req -in server.csr -out server.cer -sha256 -CA ca.cer -CAkey ca_private.key -CAserial ca.srl -CAcreateserial -days 3650

openssl x509 -inform PEM -in server.cer -out server.crt

openssl x509 -inform PEM -in server.cer -out server.pem