# session settings
ssl_session_timeout 1d;
ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
ssl_session_tickets off;

# ssl certs
{{ if .Env.ENABLE_LETSENCRYPT | default "0" | toBool }}
ssl_certificate /config/acme-certs/{{ .Env.LETSENCRYPT_DOMAIN }}/fullchain.pem;
ssl_certificate_key /config/acme-certs/{{ .Env.LETSENCRYPT_DOMAIN }}/key.pem;
{{ else }}
ssl_certificate /config/keys/cert.crt;
ssl_certificate_key /config/keys/cert.key;
{{ end }}

# protocols
# Mozilla Guideline v5.6, nginx 1.14.2, OpenSSL 1.1.1d, intermediate configuration, no OCSP
# https://ssl-config.mozilla.org/#server=nginx&version=1.14.2&config=intermediate&openssl=1.1.1d&ocsp=false&guideline=5.6
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
ssl_prefer_server_ciphers off;

# Diffie-Hellman parameter for DHE cipher suites
ssl_dhparam /defaults/ffdhe2048.txt;

# HSTS (ngx_http_headers_module is required) (63072000 seconds)
{{ if .Env.ENABLE_HSTS | default "1" | toBool }}
add_header Strict-Transport-Security "max-age=63072000" always;
{{ end }}