8. 
```
openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -nodes -days 365 -subj '/C=RU/ST=SamaraRegion/L=Samara/O=MyOffice/OU=SamaraDep/CN=myoffice.ru/'
openssl x509 -in cert.pem -noout -text
```