Add WIP modules for matrix and coturn

modules/default.nix

@@ -30,6 +30,8 @@
     ./security/gpg.nix
     ./security/pass.nix
     ./services/borgmatic
+    ./services/coturn
+    ./services/matrix
     ./shell/git
     ./shell/zsh
   ];

modules/services/coturn/default.nix

@@ -0,0 +1,59 @@
+{ config, lib, pkgs, inputs, ... }:
+
+with lib;
+
+let
+  cfg = config.modules.services.coturn;
+  domain = "vimium.com";
+in {
+  options.modules.services.coturn = {
+    enable = mkOption {
+      default = false;
+      example = true;
+    };
+  };
+
+  config = {
+    age.secrets."passwords/services/coturn/secret" = {
+      file = "${inputs.secrets}/passwords/services/coturn/secret.age";
+    };
+
+    networking.firewall = {
+      allowedTCPPorts = [
+        5349  # STUN TLS
+        5350  # STUN TLS alt
+      ];
+      allowedUDPPortRanges = [
+        { from = 49152; to = 49999; } # TURN relay
+      ];
+    };
+
+    services.coturn = {
+      enable = true;
+      lt-cred-mech = true;
+      use-auth-secret = true;
+      static-auth-secret = ""; # TODO: Pass as extraConfig
+      realm = "turn.${domain}";
+      relay-ips = [
+        "198.244.190.160"
+      ];
+      no-tcp-relay = true;
+      extraConfig = ''
+        cipher-list="HIGH"
+        no-loopback-peers
+        no-multicast-peers
+      '';
+      secure-stun = true;
+      cert = "/var/lib/acme/turn.${domain}/fullchain.pem";
+      pkey = "/var/lib/acme/turn.${domain}/key.pem";
+      min-port = 49152;
+      max-port = 49999;
+    };
+
+    security.acme.certs = {
+      "turn.${domain}" = {
+        reloadServices = [ "coturn" ];
+      };
+    };
+  };
+}

modules/services/matrix/default.nix

@@ -0,0 +1,120 @@
+{ config, lib, pkgs, inputs, ... }:
+
+with lib;
+
+let
+  cfg = config.modules.services.matrix;
+  domain = "vimium.com";
+  clientConfig = {
+    "m.homeserver" = {
+      base_url = "https://matrix.${domain}";
+      server_name = domain;
+    };
+    "m.identity_server" = {};
+  };
+  serverConfig."m.server" = "matrix.${domain}:443";
+  mkWellKnown = data: ''
+    more_set_headers 'Content-Type: application/json';
+    return 200 '${builtins.toJSON data}';
+  '';
+in {
+  options.modules.services.matrix = {
+    enable = mkOption {
+      default = false;
+      example = true;
+    };
+    coturn = mkOption {
+      default = config.services.coturn.enable;
+      example = true;
+    };
+    elementWeb = mkOption {
+      default = true;
+      example = true;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    networking.firewall = {
+      allowedTCPPorts = [
+        8448  # Matrix federation
+      ];
+    };
+
+    services.nginx = {
+      virtualHosts = {
+        "${domain}" = {
+          # Assume this listener is already setup
+          locations."= /.well-known/matrix/server".extraConfig = (mkWellKnown serverConfig);
+          locations."= /.well-known/matrix/client".extraConfig = (mkWellKnown clientConfig);
+        };
+        "matrix.${domain}" = {
+          forceSSL = true;
+          useACMEHost = "matrix.${domain}";
+          listen = [
+            { addr = "0.0.0.0"; port = 443; ssl = true; }
+            { addr = "0.0.0.0"; port = 80; }
+            { addr = "0.0.0.0"; port = 8448; ssl = true; }
+            { addr = "[::1]"; port = 443; ssl = true; }
+            { addr = "[::1]"; port = 80; }
+            { addr = "[::1]"; port = 8448; ssl = true; }
+          ];
+          locations = {
+            "/" = {
+              proxyPass = "http://localhost:8008";
+              extraConfig = ''
+                proxy_set_header X-Forwarded-For $remote_addr;
+              '';
+            };
+            "/_matrix" = {
+              proxyPass = "http://localhost:8008";
+              extraConfig = ''
+                proxy_set_header X-Forwarded-For $remote_addr;
+                client_max_body_size ${services.matrix-synapse.settings.max_upload_size};
+              '';
+            };
+            "/_synapse/client".proxyPass = "http://localhost:8008";
+          };
+        };
+        "chat.${domain}" = mkIf cfg.elementWeb {
+          forceSSL = true;
+          useACMEHost = "matrix.${domain}";
+          root = pkgs.element-web.override {
+            conf = {
+              default_server_config = clientConfig;
+              brand = "Vimium Chat";
+              branding = {
+                auth_header_logo_url = "https://vimium.com/images/logo.svg";
+                auth_footer_links = [
+                  { text = "Vimium.com"; url = "https://www.vimium.com"; }
+                ];
+              };
+            };
+          };
+        };
+      };
+    };
+
+    services.matrix-synapse = {
+      enable = true;
+      settings = {
+        database.name = "sqlite3";
+        enable_registration = false;
+        server_name = domain;
+        turn_shared_secret_file = mkIf cfg.coturn config.age.secrets."passwords/services/coturn/secret".path;
+        turn_uris = mkIf cfg.coturn [
+          "turn:${config.services.coturn.realm}:5349?transport=udp"
+          "turn:${config.services.coturn.realm}:5350?transport=udp"
+          "turn:${config.services.coturn.realm}:5349?transport=tcp"
+          "turn:${config.services.coturn.realm}:5350?transport=tcp"
+        ];
+      };
+    };
+
+    security.acme.certs = {
+      "matrix.${domain}" = {
+        extraDomainNames = mkIf cfg.elementWeb [ "chat.${domain}" ];
+        reloadServices = [ "matrix-synapse" ];
+      };
+    };
+  };
+}