22 Stateless Mode

Dadeos edited this page 2024-09-21 18:44:37 +01:00

Table of Contents

• Stateless Mode
• NGINX
• CADDY
• APACHE
• HAPROXY

Stateless Mode

Configure your webserver to respond statelessly to challenges for a given account key. This requires nothing more than a one-time web server configuration change and no "moving parts".

1. First get your account key thumbprint:

   root@ed:~# acme.sh --register-account
   [Mon Feb  6 21:40:18 CST 2017] Registering account
   [Mon Feb  6 21:40:19 CST 2017] Already registered
   [Mon Feb  6 21:40:21 CST 2017] Update success.
   [Mon Feb  6 21:40:21 CST 2017] ACCOUNT_THUMBPRINT='6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd'
   

   Remember the thumbprint in the last line: 6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd

2. Configure the web server to return the account key thumbprint:

   NGINX

   Add something similar to your nginx.conf:

   http {
   ...
     server {
     ...
       location ~ ^/\.well-known/acme-challenge/([-_a-zA-Z0-9]+)$ {
         default_type text/plain;
         return 200 "$1.6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd";
       }
     ...
     }
   }
   

   CADDY

   Add something similar to your Caddyfile:

   example.com {
     @achallenge {
       path_regexp ch ^/\.well-known/acme-challenge/([-_a-zA-Z0-9]+)$
    }
    respond @achallenge "{re.ch.1}.6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd"
   

   APACHE

   Tested on Apache 2.4.62

   Add something similar to your httpd.conf:

   ...
   <VirtualHost *:80>
       ...
       <LocationMatch "/.well-known/acme-challenge/(?<challenge>[-_a-zA-Z0-9]+)">
           RewriteEngine On
           RewriteRule "^([-_a-zA-Z0-9]+)$" "$1" [E=challenge:$1]
           ErrorDocument 200 "%{ENV:MATCH_CHALLENGE}.6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd"
           RewriteRule ^ - [L,R=200]
       </LocationMatch>
       ...
   </VirtualHost>
   ...
   

   HAPROXY

   Add the http-request return rule to your configuration:

   global
       setenv ACCOUNT_THUMBPRINT '6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd'
       log stderr local0
       stats socket /var/run/haproxy.sock level admin mode 0666
   
   frontend web
       log global
       option httplog
       mode  http
       bind :80
       bind :443 ssl crt /etc/haproxy/certs/
       http-request return status 200 content-type text/plain lf-string "%[path,field(-1,/)].${ACCOUNT_THUMBPRINT}\n" if { path_reg '^/.well-known/acme-challenge/[-_a-zA-Z0-9]+$' }
   

3. Ok, you can issue cert now.

acme.sh --issue -d example.com  --stateless

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