nginx-configs/sites-available/cryptpad.conf

server {
	listen 80;
	listen [::]:80;

	listen 11021;
	listen [::]:11021;

	server_name pad.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion;
	server_name vernccl7gknhlgousdumou4dryxkm25dzx54yitr6k7kqxzfulwa.b32.i2p;

	location / {
#		proxy_pass https://pad.vern.cc/;
		proxy_redirect https://pad.vern.cc/ http://$host/;
		proxy_set_header Host pad.vern.cc;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header X-Forwarded-Proto $scheme;
	}
	
}

server {
	listen 443 ssl http2;

	add_header Onion-Location http://pad.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion$request_uri;

	# 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 "pad.vern.cc";
	set $sandbox_domain "crypt-sandbox.vern.cc";

	# By default CryptPad allows remote domains to embed CryptPad documents in iframes.
	# This behaviour can be blocked by changing $allowed_origins from "*" to the
	# sandbox domain, which must be permitted to load content from the main domain
	# in order for CryptPad to work as expected.
	#
	# An example is given below which can be uncommented if you want to block
	# remote sites from including content from your server
	set $allowed_origins "*";
	# set $allowed_origins "https://${sandbox_domain}";

	# 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 can be added as exceptions to any rules which block connections to remote domains.
	# You can find these variables referenced below in the relevant places
	set $api_domain "pad.vern.cc";
	set $files_domain "pad.vern.cc";

	# nginx doesn't let you set server_name via variables, so you need to hardcode your domains here
	server_name pad.vern.cc crypt-sandbox.vern.cc;

	# You'll need to Set the path to your certificates and keys here
	# IMPORTANT: this config is intended to serve assets for at least two domains
	# (your main domain and your sandbox domain). As such, you'll need to generate a single SSL certificate
	# that includes both domains in order for things to work as expected.
	include snippets/lets-encrypt.conf;
	# Speeds things up a little bit when resuming a session
	ssl_session_timeout 5m;
	ssl_session_cache shared:SSL:5m;

	# You'll need nginx 1.13.0 or better to support TLSv1.3
	ssl_protocols TLSv1.2 TLSv1.3;

	# https://cipherli.st/
	ssl_ciphers EECDH+AESGCM:EDH+AESGCM;
	ssl_ecdh_curve secp384r1; # Requires nginx >= 1.1.0

	add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
	add_header X-XSS-Protection "1; mode=block";
	add_header X-Content-Type-Options nosniff;
	add_header Access-Control-Allow-Origin "${allowed_origins}";
	# add_header X-Frame-Options "SAMEORIGIN";

	# Opt out of Google's FLoC Network
	add_header Permissions-Policy interest-cohort=();

	# Enable SharedArrayBuffer in Firefox (for .xlsx export)
	add_header Cross-Origin-Resource-Policy cross-origin;
	add_header Cross-Origin-Embedder-Policy require-corp;

	# Insert the path to your CryptPad repository root here
	root /home/cryptpad/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 $styleSrc   "'unsafe-inline' 'self' https://${main_domain}";

	# connect-src restricts URLs which can be loaded using script interfaces
	# if you have configured your instance to use a dedicated $files_domain or $api_domain
	# you will need to add them below as: https://${files_domain} and https://${api_domain}
	set $connectSrc "'self' https://${main_domain} blob: wss://${api_domain} https://${sandbox_domain}";

	# fonts can be loaded from data-URLs or the main domain
	set $fontSrc	"'self' data: https://${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 $imgSrc	 "'self' data: blob: https://${main_domain}";

	# frame-src specifies valid sources for nested browsing contexts.
	# this prevents loading any iframes from anywhere other than the sandbox domain
	set $frameSrc   "'self' https://${sandbox_domain} blob:";

	# specifies valid sources for loading media using video or audio
	set $mediaSrc   "blob:";

	# 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  "'self'";

	# script-src specifies valid sources for javascript, including inline handlers
	set $scriptSrc  "'self' resource: https://${main_domain}";

	# frame-ancestors specifies which origins can embed your CryptPad instance
	# this must include 'self' and your main domain (over HTTPS) in order for CryptPad to work
	# if you have enabled remote embedding via the admin panel then this must be more permissive.
	# note: cryptpad.fr permits web pages served via https: and vector: (element desktop app)
	#set $frameAncestors "'self' https://${main_domain}";
	set $frameAncestors "'self' https: vector:";

	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 $scriptSrc "'self' 'unsafe-eval' 'unsafe-inline' resource: https://${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; frame-ancestors $frameAncestors";

	# 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://localhost:3475;
		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/.*$ {
		proxy_pass http://localhost:3475;
		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;
	}

	# encrypted blobs are immutable and are thus cached for a year
	location ^~ /blob/ {
		if ($request_method = 'OPTIONS') {
			add_header 'Access-Control-Allow-Origin' "${allowed_origins}";
			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 X-Content-Type-Options nosniff;
		add_header Cache-Control max-age=31536000;
		add_header 'Access-Control-Allow-Origin' "${allowed_origins}";
		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,Content-Length';
		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,Content-Length';
		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/ {
		add_header X-Content-Type-Options nosniff;
		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/ {
		#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|checkup)$ {
		rewrite ^(.*)$ $1/ redirect;
	}

	# Finally, serve anything the above exceptions don't govern.
	try_files /www/$uri /www/$uri/index.html /customize/$uri;
}