Apache
https://httpd.apache.org/docs/2.4/fr/ssl/ssl_howto.html
https://httpd.apache.org/docs/2.4/fr/mod/mod_ssl.html
https://ungeek.fr/http-ssl-client-certificate/
https://www.linuxtricks.fr/wiki/openssl-creation-de-certificats-et-ca-autosignes
Openssl
https://linux.die.net/man/1/openssl
https://www.openssl.org/docs/man1.0.2/man1/pkcs12.html
https://www.openssl.org/docs/manmaster/man1/openssl-req.html