Hello all!
I have tried to run Cryptpad on a NixOS VPS, adapting the config from an old thread. Most things work, but I cannot register new users and the Cryptpad Checkup complains about not being configured securely. Has anybody found a way to adapt the Cryptpad NGINX config to NixOS in a way that everything works? I would like to migrate away from my last Debian server in the near future.
Thanks in Advance.
Can we see your configuration.nix?
As I said, I adapted from the old thread and just changed the domains.
My cryptpad-nginx.nix:
{ config, pkgs, ... }:
let
cryptpadConfig = ''
# CryptPad serves static assets over these two domains.
# `main_domain` is what users will enter in their address bar.
# Privileged computation such as key management is handled in this scope
# UI content is loaded via the `sandbox_domain`.
# "Content Security Policy" headers prevent content loaded via the sandbox
# from accessing privileged information.
# These variables must be different to take advantage of CryptPad's sandboxing techniques.
# In the event of an XSS vulnerability in CryptPad's front-end code
# this will limit the amount of information accessible to attackers.
set $main_domain "cryptpad.kuecker.xyz";
set $sandbox_domain "cryptpad-sandbox.kuecker.xyz";
# CryptPad's dynamic content (websocket traffic and encrypted blobs)
# can be served over separate domains. Using dedicated domains (or subdomains)
# for these purposes allows you to move them to a separate machine at a later date
# if you find that a single machine cannot handle all of your users.
# If you don't use dedicated domains, this can be the same as $main_domain
# If you do, they'll be added as exceptions to any rules which block connections to remote domains.
set $api_domain "cryptpad.kuecker.xyz";
set $files_domain "cryptpad.kuecker.xyz";
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options nosniff;
add_header Access-Control-Allow-Origin "*";
# add_header X-Frame-Options "SAMEORIGIN";
# Opt out of Google's FLoC Network
add_header Permissions-Policy interest-cohort=();
set $coop ${"''"};
#if ($uri ~ ^\/(sheet|presentation|doc|convert)\/.*$) { set $coop 'same-origin'; }
# Enable SharedArrayBuffer in Firefox (for .xlsx export)
add_header Cross-Origin-Resource-Policy cross-origin;
add_header Cross-Origin-Opener-Policy $coop;
add_header Cross-Origin-Embedder-Policy require-corp;
# Insert the path to your CryptPad repository root here
root ${pkgs.cryptpad}/lib/node_modules/cryptpad;
index index.html;
error_page 404 /customize.dist/404.html;
# any static assets loaded with "ver=" in their URL will be cached for a year
if ($args ~ ver=) {
set $cacheControl max-age=31536000;
}
if ($uri ~ ^/.*(\/|\.html)$) {
set $cacheControl no-cache;
}
# Will not set any header if it is emptystring
add_header Cache-Control $cacheControl;
# CSS can be dynamically set inline, loaded from the same domain, or from $main_domain
set $styleSrc "'unsafe-inline' 'self' ''${main_domain}";
# connect-src restricts URLs which can be loaded using script interfaces
set $connectSrc "'self' https://''${main_domain} ''${main_domain} https://''${api_domain} blob: wss://''${api_domain} ''${api_domain} ''${files_domain}";
# fonts can be loaded from data-URLs or the main domain
set $fontSrc "'self' data: ''${main_domain}";
# images can be loaded from anywhere, though we'd like to deprecate this as it allows the use of images for tracking
set $imgSrc "'self' data: * blob: ''${main_domain}";
# frame-src specifies valid sources for nested browsing contexts.
# this prevents loading any iframes from anywhere other than the sandbox domain
set $frameSrc "'self' ''${sandbox_domain} blob:";
# specifies valid sources for loading media using video or audio
set $mediaSrc "'self' data: * blob: ''${main_domain}";
# defines valid sources for webworkers and nested browser contexts
# deprecated in favour of worker-src and frame-src
set $childSrc "https://''${main_domain}";
# specifies valid sources for Worker, SharedWorker, or ServiceWorker scripts.
# supercedes child-src but is unfortunately not yet universally supported.
set $workerSrc "https://''${main_domain}";
# script-src specifies valid sources for javascript, including inline handlers
set $scriptSrc "'self' resource: ''${main_domain}";
set $unsafe 0;
# the following assets are loaded via the sandbox domain
# they unfortunately still require exceptions to the sandboxing to work correctly.
if ($uri ~ ^\/(sheet|doc|presentation)\/inner.html.*$) { set $unsafe 1; }
if ($uri ~ ^\/common\/onlyoffice\/.*\/.*\.html.*$) { set $unsafe 1; }
# everything except the sandbox domain is a privileged scope, as they might be used to handle keys
if ($host != $sandbox_domain) { set $unsafe 0; }
# this iframe is an exception. Office file formats are converted outside of the sandboxed scope
# because of bugs in Chromium-based browsers that incorrectly ignore headers that are supposed to enable
# the use of some modern APIs that we require when javascript is run in a cross-origin context.
# We've applied other sandboxing techniques to mitigate the risk of running WebAssembly in this privileged scope
if ($uri ~ ^\/unsafeiframe\/inner\.html.*$) { set $unsafe 1; }
# privileged contexts allow a few more rights than unprivileged contexts, though limits are still applied
if ($unsafe) {
set $scriptSrc "'self' 'unsafe-eval' 'unsafe-inline' resource: ''${main_domain}";
}
# Finally, set all the rules you composed above.
add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";
# The nodejs process can handle all traffic whether accessed over websocket or as static assets
# We prefer to serve static content from nginx directly and to leave the API server to handle
# the dynamic content that only it can manage. This is primarily an optimization
location ^~ /cryptpad_websocket {
proxy_pass http://[::1]:3000;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# WebSocket support (nginx 1.4)
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection upgrade;
}
location ^~ /customize.dist/ {
# This is needed in order to prevent infinite recursion between /customize/ and the root
}
# try to load customizeable content via /customize/ and fall back to the default content
# located at /customize.dist/
# This is what allows you to override behaviour.
location ^~ /customize/ {
rewrite ^/customize/(.*)$ $1 break;
try_files /customize/$uri /customize.dist/$uri;
}
# /api/config is loaded once per page load and is used to retrieve
# the caching variable which is applied to every other resource
# which is loaded during that session.
location ~ ^/api/(config|broadcast).*$ {
proxy_pass http://[::1]:3000;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# These settings prevent both NGINX and the API server
# from setting the same headers and creating duplicates
proxy_hide_header Cross-Origin-Resource-Policy;
add_header Cross-Origin-Resource-Policy cross-origin;
proxy_hide_header Cross-Origin-Embedder-Policy;
add_header Cross-Origin-Embedder-Policy require-corp;
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options nosniff;
add_header Access-Control-Allow-Origin '*';
add_header Permissions-Policy interest-cohort=();
add_header Cross-Origin-Resource-Policy cross-origin;
add_header Cross-Origin-Opener-Policy $coop;
add_header Cross-Origin-Embedder-Policy require-corp;
add_header Cache-Control $cacheControl;
add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";
}
# encrypted blobs are immutable and are thus cached for a year
location ^~ /blob/ {
root /www/cryptpad;
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options nosniff;
add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";
if ($request_method = 'OPTIONS') {
add_header Cache-Control $cacheControl;
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options nosniff;
add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'application/octet-stream; charset=utf-8';
add_header 'Content-Length' 0;
return 204;
}
add_header Cache-Control max-age=31536000;
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
try_files $uri =404;
}
# the "block-store" serves encrypted payloads containing users' drive keys
# these payloads are unlocked via login credentials. They are mutable
# and are thus never cached. They're small enough that it doesn't matter, in any case.
location ^~ /block/ {
root /www/cryptpad;
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options nosniff;
add_header Access-Control-Allow-Origin "*";
add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";
add_header Cache-Control max-age=0;
try_files $uri =404;
}
# This block provides an alternative means of loading content
# otherwise only served via websocket. This is solely for debugging purposes,
# and is thus not allowed by default.
#location ^~ /datastore/ { # nixos: possibly also blobstage, data, pins, tasks
#root /www/cryptpad;
#add_header Cache-Control max-age=0;
#try_files $uri =404;
#}
# The nodejs server has some built-in forwarding rules to prevent
# URLs like /pad from resulting in a 404. This simply adds a trailing slash
# to a variety of applications.
location ~ ^/(register|login|settings|user|pad|drive|poll|slide|code|whiteboard|file|media|profile|contacts|todo|filepicker|debug|kanban|sheet|support|admin|notifications|teams|calendar|presentation|doc|form|report|convert)$ {
rewrite ^(.*)$ $1/ redirect;
}
# Finally, serve anything the above exceptions don't govern.
try_files /www/$uri /www/$uri/index.html /customize/$uri;
'';
in {
services.cryptpad = {
enable = true;
configFile = ./cryptpad-config.js;
};
services.nginx.virtualHosts = {
"cryptpad.kuecker.xyz" = {
forceSSL = true;
enableACME = true;
extraConfig = cryptpadConfig;
};
"cryptpad-sandbox.kuecker.xyz" = {
forceSSL = true;
enableACME = true;
extraConfig = cryptpadConfig;
};
};
}
The config.js I took from the example config and just changed the domain names.