Set up pounce on lapetus

.sops.yaml

@@ -16,6 +16,11 @@ creation_rules:
       - age: 
         - *prescientmoon
         - *lapetus
+  - path_regex: hosts/nixos/lapetus/secrets.yaml
+    key_groups:
+      - age: 
+        - *prescientmoon
+        - *lapetus
   - path_regex: home/features/desktop/wakatime/secrets.yaml
     key_groups:
       - age:

hosts/nixos/common/optional/services/nginx.nix

@@ -1,4 +1,5 @@
 {
+  imports = [ ./acme ];
   services.nginx = {
     enable = true;
     recommendedGzipSettings = true;

hosts/nixos/lapetus/default.nix

@@ -3,10 +3,10 @@
     ../common/global
     ../common/users/adrielus.nix
     ../common/optional/services/slambda.nix
-    ../common/optional/services/acme
 
     ./services/syncthing.nix
     ./services/whoogle.nix
+    ./services/pounce.nix
     ./filesystems
     ./hardware
   ];

hosts/nixos/lapetus/secrets.yaml

@@ -0,0 +1,30 @@
+tilde_irc_pass: ENC[AES256_GCM,data:+pw/g0pffo1zF++1H/+iFXQDCDw=,iv:zTBvaUCwt78dgv1jF9EmrTuHMnM2S+GUGpQZWY828tA=,tag:umqaQOWqy8aMOxWR0CNGHQ==,type:str]
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age:
+        - recipient: age14mga4r0xa82a2uus3wq5q7rqnvflms3jmhknz4f3hsda8wttk9gsv2k9fs
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBYcjFoRm1WNW9jOUJjUC9W
+            NmxhWGRjWlFHd2tRaXJ6WnpaaWlxSFQ0RlZnCllVNTZ0b0MvL0VURDhQRUE1dDdW
+            L1NkYzBRRDFLcFpwTTgzRnphLy9GT00KLS0tIFcvU2ZUQ21FZU1NTEFJaHRTVjV3
+            eU1YeEZIOTJKa3I4c3ZwbVdPMlBLbmMKCBhopcTXWiAwR8ACyDf+P11SYcPrPSSv
+            QRPJ6I8Y1Lc7KTCbkO8zW2hBb6fdbvWBJQtW0rOfCuGQ831OyArr0w==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age1jem6jfkmfq54wzhqqhrnf786jsn5dmx82ewtt4vducac8m2fyukskun2p4
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBGV2VmdmJ2QlVVbUF6MUtt
+            dzZFUGJFS3cyKzlTTHJiWjlqRmJkUm04WXh3CktSdGRIUWxJRU5oVVdkUTFwaEZr
+            M1Y4NnRtclZVTkltOHNjNXAxVW9yaFEKLS0tIGlRYjgwd0FkN0FBU1RSQjRnVWpW
+            RHZ6alYrUU5BZ2xlMkdGR1dWRG5aeGMKJdsdtVZ6Mk9Vo3a+tS+rzAgaF2wpH+8U
+            lWhA+c0Kbe8EJT8hm7Vr8PqBmElz4V9AnXSCTp7D+Cu4pfWsHopLUQ==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2024-01-31T20:47:59Z"
+    mac: ENC[AES256_GCM,data:srdBFOeQmSc5CEIAjAqVzN4GuQL2el+/Q9cyAavr6Iv/LUUysdf6XkH9U3sZBRBdlcW2RR/Fu95kzSa51QL2RYOmnm6/MM6Kwa13MfTCiLiQBeH6tmCRBO9bKPwE9W24f4RwYhK4m5dIXdhCbN+GsCg6utEEgNKRCRFYSHe6h4Y=,iv:qkz66HLu8EcSDFD6Hkk3mNcP8zxNjAb9keZG/q8d2jM=,tag:M6jybdc4FwUcWbbjbiUONQ==,type:str]
+    pgp: []
+    unencrypted_suffix: _unencrypted
+    version: 3.8.1

hosts/nixos/lapetus/services/pounce.nix

@@ -0,0 +1,26 @@
+{ config, ... }:
+let makeNetworkConfig = host: port: join: secret: {
+  content = ''
+    sasl-plain = prescientmoon:${config.sops.placeholder.${secret}}
+    host = ${host}
+    port = ${toString port}
+    join = ${join}
+  '';
+  owner = config.services.pounce.user;
+};
+in
+{
+  security.acme.certs."wildcard-irc.moonythm.dev" = {
+    group = "pounce";
+    domain = "*.irc.moonythm.dev";
+  };
+
+  sops.secrets.tilde_irc_pass.sopsFile = ../secrets.yaml;
+  sops.templates."pounce-tilde.cfg" = makeNetworkConfig "eu.tilde.chat" 6697 "#meta" "tilde_irc_pass";
+  # services.pounce = {
+  #   enable = true;
+  #   externalHost = "irc.moonythm.dev";
+  #   certDir = "/var/lib/acme/wildcard-irc.moonythm.dev";
+  #   networks.tilde.config = config.sops.templates."pounce-tilde.cfg".path;
+  # };
+}

hosts/nixos/lapetus/services/syncthing.nix

@@ -1,11 +1,13 @@
+{ config, ... }:
+let port = 8384;
+in
 {
   imports = [ ../../common/optional/services/syncthing.nix ];
 
-  networking.firewall.allowedTCPPorts = [ 8384 ];
-
   services.syncthing = {
-    guiAddress = "0.0.0.0:8384"; # TODO: put this behind nginx
-
     settings.folders = { };
+    guiAddress = "127.0.0.1:${toString port}";
   };
+
+  services.nginx.virtualHosts."lapetus.syncthing.moonythm.dev" = config.satellite.proxy port;
 }

hosts/nixos/lapetus/services/whoogle.nix

@@ -1,4 +1,4 @@
-{ lib, ... }:
+{ lib, config, ... }:
 let
   port = 8401;
   websiteBlocklist = [
@@ -9,7 +9,10 @@ let
   ];
 in
 {
-  imports = [ ../../common/optional/podman.nix ./nginx.nix ];
+  imports = [
+    ../../common/optional/podman.nix
+    ../../common/optional/services/nginx.nix
+  ];
 
   virtualisation.oci-containers.containers.whoogle-search = {
     image = "benbusby/whoogle-search";
@@ -23,10 +26,8 @@ in
     };
   };
 
-  services.nginx.virtualHosts."search.moonythm.dev" = {
-    enableACME = true;
-    acmeRoot = null;
-    forceSSL = true;
-    locations."/".proxyPass = "http://127.0.0.1:${toString port}";
-  };
+  services.nginx.virtualHosts."search.moonythm.dev" = config.satellite.proxy port;
+  environment.persistence."/persist/state".directories = [
+    "/var/lib/acme"
+  ];
 }

modules/nixos/default.nix

@@ -2,4 +2,6 @@
 
 {
   # example = import ./example.nix;
+  nginx = import ./nginx.nix;
+  pounce = import ./pounce.nix;
 }

modules/nixos/nginx.nix

@@ -0,0 +1,13 @@
+{ lib, ... }: {
+  options.satellite.proxy = {
+    type = lib.types.functionTo lib.types.anything;
+    description = "Helper function for generating a quick proxy config";
+  };
+
+  config.satellite.proxy = port: {
+    enableACME = true;
+    acmeRoot = null;
+    forceSSL = true;
+    locations."/".proxyPass = "http://127.0.0.1:${toString port}";
+  };
+}

modules/nixos/pounce.nix

@@ -0,0 +1,192 @@
+# Taken from https://git.tempest.dev/ashe/nixos-wrapper-pounce/src/branch/main/flake.nix
+# I have removed a lot of the things I didn't need, and modified a few things to fit 
+# my preferences (specifically, simplified the cert situation)
+{ config, lib, pkgs, ... }:
+with lib;
+let
+  cfg = config.services.pounce;
+  pkg = pkgs.pounce;
+  defaultUser = "pounce";
+
+  # {{{ systemd hardening flags
+  hardeningFlags = {
+    CapabilityBoundingSet = [ "" ];
+    NoNewPrivileges = true;
+    PrivateDevices = true;
+    PrivateMounts = true;
+    PrivateTmp = true;
+    PrivateUsers = true;
+    ProtectClock = true;
+    ProtectControlGroups = true;
+    ProtectKernelLogs = true;
+    ProtectKernelModules = true;
+    ProtectKernelTunables = true;
+    ProtectProc = "invisible";
+    RestrictAddressFamilies = [ "AF_INET" "AF_INET6" "AF_UNIX" ];
+    RestrictNamespaces = true;
+    RestrictSUIDSGID = true;
+    SystemCallArchitectures = "native";
+    SystemCallFilter = [ "@system-service" "~@privileged" "~@resources" ];
+  };
+  # }}}
+in
+{
+  # {{{ Options
+  options.services.pounce = {
+    # {{{ general options
+    enable = mkEnableOption
+      (lib.mdDoc "the Pounce IRC bouncer and Calico dispatcher");
+
+    user = mkOption {
+      type = types.str;
+      default = defaultUser;
+      description = lib.mdDoc ''
+        User account under which Pounce runs. If not specified, a default user
+        will be created.
+      '';
+    };
+
+    dataDir = mkOption {
+      type = types.str;
+      default = "/run/pounce";
+      description = lib.mdDoc ''
+        Directory where each Pounce instance's UNIX-domain socket is stored for
+        Calico to route to.
+      '';
+    };
+
+    externalHost = mkOption {
+      type = types.str;
+      example = "example.org";
+      description = lib.mdDoc ''
+        Base domain name Calico will be accessible at. Each instance
+        will be at a subdomain of this.
+      '';
+    };
+
+    bindHost = mkOption {
+      type = types.str;
+      default = "localhost";
+      description = lib.mdDoc ''
+        The IP or host for Calico to bind to.
+      '';
+    };
+
+    port = mkOption {
+      type = types.port;
+      default = 6697;
+      description = lib.mdDoc "Port for Calico to listen on.";
+    };
+
+    openFirewall = mkOption {
+      type = types.bool;
+      default = false;
+      description = lib.mdDoc "Open port in the firewall for Calico.";
+    };
+
+    timeout = mkOption {
+      type = types.ints.positive;
+      default = 1000;
+      description = lib.mdDoc ''
+        Timeout parameter (in milliseconds) for Calico to close a connection
+        if no `ClientHello` message is sent.
+      '';
+    };
+
+    certDir = mkOption {
+      type = types.str;
+      example = "/var/lib/acme/wildcard-irc.exmaple.com";
+      description = lib.mdDoc ''
+        Directory where each Pounce instance's TLS certificates and private
+        keys are stored. The folder must contain wildcard certs as generated by acme.
+      '';
+    };
+    # }}} 
+    # {{{ networks 
+    networks = mkOption {
+      type = types.attrsOf (types.submodule {
+        options = {
+          config = mkOption {
+            type = types.path;
+            description = lib.mdDoc ''
+              Location to load pounce configuration from
+            '';
+          };
+        };
+      });
+      default = { };
+      description = lib.mdDoc "Attribute set of IRC networks to connect to.";
+    };
+  };
+  # }}}
+  # }}}
+  # {{{ config 
+  config = mkIf cfg.enable {
+    systemd.tmpfiles.rules = [ "d ${cfg.dataDir} 0700 ${cfg.user} ${cfg.user} -" ];
+    systemd.services = mkMerge (
+      # {{{ calico service 
+      [
+        {
+          calico = {
+            wantedBy = [ "multi-user.target" ];
+            after = [ "network.target" ];
+
+            description = "Calico dispatcher for Pounce IRC bouncer.";
+
+            serviceConfig = {
+              User = cfg.user;
+              Group = cfg.user;
+              ExecStart = ''
+                ${pkg}/bin/calico \
+                  -H ${cfg.bindHost} -P ${toString cfg.port} \
+                  -t ${toString cfg.timeout} ${cfg.dataDir}
+              '';
+              Restart = "on-failure";
+            } // hardeningFlags;
+          };
+        }
+      ] ++
+      # }}}
+      # {{{ pounce service
+      (mapAttrsToList
+        (name: value: mkMerge [
+          {
+            "pounce-${name}" = {
+              wantedBy = [ "calico.service" ];
+              after = [ "network.target" ];
+              before = [ "calico.service" ];
+
+              description = "Pounce IRC bouncer for the ${name} network.";
+
+              serviceConfig = {
+                User = cfg.user;
+                Group = cfg.user;
+                ExecStart = ''
+                  ${pkg}/bin/pounce \
+                    -C ${cfg.certDir}/fullchain.pem \
+                    -K ${cfg.certDir}/key.pem \
+                    -U ${cfg.dataDir} -H ${name}.${cfg.externalHost} \
+                    ${value.config}
+                '';
+                Restart = "on-failure";
+              } // hardeningFlags;
+            };
+          }
+        ])
+        cfg.networks)
+      # }}}
+    );
+
+    users = optionalAttrs (cfg.user == defaultUser) {
+      users.${defaultUser} = {
+        group = defaultUser;
+        isSystemUser = true;
+      };
+
+      groups.${defaultUser} = { };
+    };
+
+    networking.firewall.allowedTCPPorts = mkIf cfg.openFirewall [ cfg.port ];
+  };
+  # }}}
+}