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nixos/tests/dnscrypt-wrapper: test TCP and run on port 443
- Test both TCP and UDP queries (tinydns → bind) - Test IPv6 by default - Run DNSCrypt on port 443 along with HTTPS
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61202fc867
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@ -1,5 +1,15 @@
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{ lib, pkgs, ... }:
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let
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snakeoil = import ../common/acme/server/snakeoil-certs.nix;
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hosts = lib.mkForce
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{ "fd::a" = [ "server" snakeoil.domain ];
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"fd::b" = [ "client" ];
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};
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in
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{
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name = "dnscrypt-wrapper";
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meta = with pkgs.lib.maintainers; {
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@ -7,59 +17,122 @@
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};
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nodes = {
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server = { lib, ... }:
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{ services.dnscrypt-wrapper = with builtins;
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server = {
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networking.hosts = hosts;
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networking.interfaces.eth1.ipv6.addresses = lib.singleton
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{ address = "fd::a"; prefixLength = 64; };
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services.dnscrypt-wrapper =
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{ enable = true;
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address = "192.168.1.1";
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address = "[::]";
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port = 5353;
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keys.expiration = 5; # days
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keys.checkInterval = 2; # min
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# The keypair was generated by the command:
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# dnscrypt-wrapper --gen-provider-keypair \
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# --provider-name=2.dnscrypt-cert.server \
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# --ext-address=192.168.1.1:5353
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providerKey.public = toFile "public.key" (readFile ./public.key);
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providerKey.secret = toFile "secret.key" (readFile ./secret.key);
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providerKey.public = "${./public.key}";
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providerKey.secret = "${./secret.key}";
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};
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services.tinydns.enable = true;
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services.tinydns.data = ''
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..:192.168.1.1:a
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+it.works:1.2.3.4
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'';
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networking.firewall.allowedUDPPorts = [ 5353 ];
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networking.firewall.allowedTCPPorts = [ 5353 ];
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networking.interfaces.eth1.ipv4.addresses = lib.mkForce
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[ { address = "192.168.1.1"; prefixLength = 24; } ];
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# nameserver
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services.bind.enable = true;
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services.bind.zones = lib.singleton
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{ name = ".";
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master = true;
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file = pkgs.writeText "root.zone" ''
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$TTL 3600
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. IN SOA example.org. admin.example.org. ( 1 3h 1h 1w 1d )
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. IN NS example.org.
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example.org. IN AAAA 2001:db8::1
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'';
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};
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# webserver
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services.nginx.enable = true;
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services.nginx.virtualHosts.${snakeoil.domain} =
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{ onlySSL = true;
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listenAddresses = [ "localhost" ];
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sslCertificate = snakeoil.${snakeoil.domain}.cert;
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sslCertificateKey = snakeoil.${snakeoil.domain}.key;
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locations."/ip".extraConfig = ''
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default_type text/plain;
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return 200 "Ciao $remote_addr!\n";
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'';
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};
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# demultiplex HTTP and DNS from port 443
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services.sslh =
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{ enable = true;
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method = "ev";
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settings.transparent = true;
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settings.listen = lib.mkForce
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[ { host = "server"; port = "443"; is_udp = false; }
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{ host = "server"; port = "443"; is_udp = true; }
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];
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settings.protocols =
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[ # Send TLS to webserver (TCP)
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{ name = "tls"; host= "localhost"; port= "443"; }
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# Send DNSCrypt to dnscrypt-wrapper (TCP or UDP)
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{ name = "anyprot"; host = "localhost"; port = "5353"; }
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{ name = "anyprot"; host = "localhost"; port = "5353"; is_udp = true;}
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];
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};
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networking.firewall.allowedTCPPorts = [ 443 ];
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networking.firewall.allowedUDPPorts = [ 443 ];
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};
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client = { lib, ... }:
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{ services.dnscrypt-proxy2.enable = true;
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services.dnscrypt-proxy2.upstreamDefaults = false;
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services.dnscrypt-proxy2.settings = {
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server_names = [ "server" ];
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static.server.stamp = "sdns://AQAAAAAAAAAAEDE5Mi4xNjguMS4xOjUzNTMgFEHYOv0SCKSuqR5CDYa7-58cCBuXO2_5uTSVU9wNQF0WMi5kbnNjcnlwdC1jZXJ0LnNlcnZlcg";
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client = {
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networking.hosts = hosts;
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networking.interfaces.eth1.ipv6.addresses = lib.singleton
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{ address = "fd::b"; prefixLength = 64; };
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services.dnscrypt-proxy2.enable = true;
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services.dnscrypt-proxy2.upstreamDefaults = false;
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services.dnscrypt-proxy2.settings =
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{ server_names = [ "server" ];
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listen_addresses = [ "[::1]:53" ];
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cache = false;
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# Computed using https://dnscrypt.info/stamps/
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static.server.stamp =
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"sdns://AQAAAAAAAAAADzE5Mi4xNjguMS4yOjQ0MyAUQdg6"
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+"_RIIpK6pHkINhrv7nxwIG5c7b_m5NJVT3A1AXRYyLmRuc2NyeXB0LWNlcnQuc2VydmVy";
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};
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networking.nameservers = [ "127.0.0.1" ];
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networking.interfaces.eth1.ipv4.addresses = lib.mkForce
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[ { address = "192.168.1.2"; prefixLength = 24; } ];
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};
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networking.nameservers = [ "::1" ];
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security.pki.certificateFiles = [ snakeoil.ca.cert ];
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};
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};
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testScript = ''
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start_all()
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with subtest("The server can generate the ephemeral keypair"):
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server.wait_for_unit("dnscrypt-wrapper")
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server.wait_for_file("/var/lib/dnscrypt-wrapper/2.dnscrypt-cert.server.key")
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server.wait_for_file("/var/lib/dnscrypt-wrapper/2.dnscrypt-cert.server.crt")
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almost_expiration = server.succeed("date --date '4days 23 hours 56min'").strip()
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with subtest("The client can connect to the server"):
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server.wait_for_unit("tinydns")
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client.wait_for_unit("dnscrypt-proxy2")
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assert "1.2.3.4" in client.wait_until_succeeds(
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"host it.works"
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), "The IP address of 'it.works' does not match 1.2.3.4"
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with subtest("The DNSCrypt client can connect to the server"):
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server.wait_for_unit("sslh")
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client.wait_until_succeeds("journalctl -u dnscrypt-proxy2 --grep '\[server\] OK'")
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with subtest("HTTP client can connect to the server"):
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server.wait_for_unit("nginx")
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client.succeed("curl -s --fail https://${snakeoil.domain}/ip | grep -q fd::b")
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with subtest("DNS queries over UDP are working"):
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server.wait_for_unit("bind")
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client.wait_for_open_port(53)
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assert "2001:db8::1" in client.wait_until_succeeds(
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"host -U example.org"
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), "The IP address of 'example.org' does not match 2001:db8::1"
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with subtest("DNS queries over TCP are working"):
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server.wait_for_unit("bind")
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client.wait_for_open_port(53)
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assert "2001:db8::1" in client.wait_until_succeeds(
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"host -T example.org"
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), "The IP address of 'example.org' does not match 2001:db8::1"
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with subtest("The server rotates the ephemeral keys"):
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# advance time by a little less than 5 days
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@ -68,7 +141,8 @@
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server.wait_for_file("/var/lib/dnscrypt-wrapper/oldkeys")
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with subtest("The client can still connect to the server"):
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server.wait_for_unit("dnscrypt-wrapper")
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client.succeed("host it.works")
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client.systemctl("restart dnscrypt-proxy2")
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client.wait_until_succeeds("host -T example.org")
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client.wait_until_succeeds("host -U example.org")
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'';
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}
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