Openbsd Nginx with Client Authentication

OpenBSD
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Requirement

/etc/httpd.conf

# $OpenBSD: httpd.conf,v 1.20 2018/06/13 15:08:24 reyk Exp $

server "*" {
  listen on * port 8080
  location "/.well-known/acme-challenge/*" {
    root "/acme"
    request strip 2
  }
}

/etc/nginx/nginx.conf

# Take note of http://wiki.nginx.org/Pitfalls

#user  www;
worker_processes  1;

#load_module "modules/ngx_stream_module.so";

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
#error_log  syslog:server=unix:/dev/log,severity=notice;

#pid        logs/nginx.pid;

worker_rlimit_nofile 1024;
events {
    worker_connections  800;
}


http {
    include       mime.types;
    default_type  application/octet-stream;
    index         index.html index.htm;

    #access_log  logs/access.log  main;

    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server_tokens off;

    server {
        listen       80;
        listen       [::]:80;
        server_name  localhost;
        root         /var/www/htdocs;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root  /var/www/htdocs;
        }
    }


    # HTTPS server
    server {
        listen       443 ssl;
        server_name  localhost;
        root         /var/www/htdocs;

        ssl_certificate      /etc/ssl/puffy201.planet.crt;
        ssl_certificate_key  /etc/ssl/private/puffy201.planet.key;

        ssl_session_timeout  5m;
        ssl_session_cache    shared:SSL:1m;

        ssl_ciphers  HIGH:!aNULL:!MD5:!RC4;
        ssl_prefer_server_ciphers   on;

        ssl_client_certificate /etc/ssl/root_ca.crt;
        ssl_verify_client optional;


    location /secure
    {
        if ($ssl_client_verify != SUCCESS) {
             return 403;
        }

        proxy_pass  http://127.0.0.1:8080;

        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;

        ### Set headers ####
        proxy_headers_hash_max_size 51200;
        proxy_headers_hash_bucket_size 6400;
        proxy_set_header        Accept-Encoding   "";
        proxy_set_header        Host            $host;
        proxy_set_header        X-Real-IP       $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header        X-Forwarded-Proto $scheme;
        add_header              Front-End-Https   on;

        proxy_redirect     off;
    }

    location /
    {
        proxy_pass  http://127.0.0.1:8080;

        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;

        ### Set headers ####
        proxy_headers_hash_max_size 51200;
        proxy_headers_hash_bucket_size 6400;
        proxy_set_header        Accept-Encoding   "";
        proxy_set_header        Host            $host;
        proxy_set_header        X-Real-IP       $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header        X-Forwarded-Proto $scheme;
        add_header              Front-End-Https   on;

        proxy_redirect     off;
      }
    }
}
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