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path: root/nix/hosts/corrino/www/sso.emile.space.nix
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{ config, pkgs, ... }:

let
  # authelia_port = config.services.authelia.instances.main.settings.server.port;
  authelia_port = config.emile.ports.authelia;
in
{

  services.nginx.virtualHosts."sso.emile.space" = {
    forceSSL = true;
    enableACME = true;

    locations = {
      "/" = {
        proxyPass = "http://127.0.0.1:${toString authelia_port}";

        extraConfig = ''
          ## Headers
          proxy_set_header Host $host;
          proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
          proxy_set_header X-Forwarded-Proto $scheme;
          proxy_set_header X-Forwarded-Host $http_host;
          proxy_set_header X-Forwarded-URI $request_uri;
          proxy_set_header X-Forwarded-Ssl on;
          proxy_set_header X-Forwarded-For $remote_addr;
          proxy_set_header X-Real-IP $remote_addr;

          ## Basic Proxy Configuration
          client_body_buffer_size 128k;
          proxy_next_upstream error timeout invalid_header http_500 http_502 http_503; ## Timeout if the real server is dead.
          proxy_redirect  http://  $scheme://;
          proxy_http_version 1.1;
          proxy_cache_bypass $cookie_session;
          proxy_no_cache $cookie_session;
          proxy_buffers 64 256k;

          ## Trusted Proxies Configuration
          ## Please read the following documentation before configuring this:
          ##     https://www.authelia.com/integration/proxies/nginx/#trusted-proxies
          # set_real_ip_from 10.0.0.0/8;
          # set_real_ip_from 172.16.0.0/12;
          # set_real_ip_from 192.168.0.0/16;
          # set_real_ip_from fc00::/7;
          set_real_ip_from 127.0.0.1/32;
          real_ip_header X-Forwarded-For;
          real_ip_recursive on;

          ## Advanced Proxy Configuration
          send_timeout 5m;
          proxy_read_timeout 360;
          proxy_send_timeout 360;
          proxy_connect_timeout 360;
        '';
      };

      "/api/verify" = {
        proxyPass = "http://127.0.0.1:${toString authelia_port}";
      };

      "/api/authz/" = {
        proxyPass = "http://127.0.0.1:${toString authelia_port}";
      };
    };
  };

  # set the permissions for the secrets...
  age.secrets = {
    # ... passwed via environment vars
    authelia_session_secret.owner = "authelia-main";
    authelia_session_secret.group = "authelia-main";
    authelia_mail_password.owner = "authelia-main";
    authelia_mail_password.group = "authelia-main";

    # ... passed via the services.authelia.instances.main.secrets attribute
    authelia_storage_encryption_key.owner = "authelia-main";
    authelia_storage_encryption_key.group = "authelia-main";
    authelia_jwt_secret.owner = "authelia-main";
    authelia_jwt_secret.group = "authelia-main";
    authelia_oidc_issuer_private_key.owner = "authelia-main";
    authelia_oidc_issuer_private_key.group = "authelia-main";
    authelia_oidc_hmac_secret.owner = "authelia-main";
    authelia_oidc_hmac_secret.group = "authelia-main";
  };

  services.authelia.instances = {
    main = {
      enable = true;
      package = pkgs.authelia;

      # pass some of the secrets in as env-vars
      environmentVariables = with config.age.secrets; {
        AUTHELIA_SESSION_SECRET_FILE = authelia_session_secret.path;
        AUTHELIA_NOTIFIER_SMTP_PASSWORD_FILE = authelia_mail_password.path;
      };
      secrets = with config.age.secrets; {
        manual = true;

        # some other secrets can be defined here, but not all...
        storageEncryptionKeyFile = authelia_storage_encryption_key.path;
        jwtSecretFile = authelia_jwt_secret.path;
        oidcIssuerPrivateKeyFile = authelia_oidc_issuer_private_key.path;
        oidcHmacSecretFile = authelia_oidc_hmac_secret.path;
      };
      settings = {
        theme = "dark";

        server = {
          # address = "127.0.0.1:${toString config.emile.ports.authelia}";
          host = "127.0.0.1";
          port = config.emile.ports.authelia;
        };

        # we're using a file to store the user information
        authentication_backend = {
          refresh_interval = "60s";
          file = {
            path = "/var/lib/authelia-main/user.yml";
            watch = true;
            password = {
              algorithm = "argon2id";
              iterations = 3;
              key_length = 32;
              salt_length = 16;
              memory = 65;
              parallelism = 4;
            };
          };
        };

        storage.local.path = "/var/lib/authelia-main/db.sqlite";

        session = {
          domain = "sso.emile.space";
          expiration = 3600; # 1 hour
          inactivity = 300; # 5 minutes
        };

        notifier = {
          disable_startup_check = false;
          smtp = {
            host = "mail.emile.space";
            port = 587;
            timeout = "30s";
            username = "mail@emile.space";

            sender = "mail@emile.space";
            subject = "[Authelia] {title}";

            disable_require_tls = false;
            disable_starttls = false;
            disable_html_emails = true;

            tls = {
              server_name = "mail.emile.space";
              skip_verify = true;
              minimum_version = "TLS1.3";
            };
          };
        };

        identity_providers = {
          oidc = {
            # regenerate keys like this:
            # ; nix run nixpkgs#authelia -- crypto certificate rsa generate
            # current serial: deb83f17e27e663f544a16ad2947631d

            enable_client_debug_messages = false;
            minimum_parameter_entropy = 8;
            enforce_pkce = "public_clients_only";
            enable_pkce_plain_challenge = false;
            cors = {
              endpoints = [
                "authorization"
                "token"
                "revocation"
                "introspection"
              ];
              allowed_origins = [ "https://emile.space" ];
              allowed_origins_from_client_redirect_uris = false;
            };
          };
        };

        access_control = {
          default_policy = "deny";
          rules = [
            {
              domain = "*.emile.space";
              policy = "two_factor";
            }
          ];
        };

        # type = types.enum [ "" "totp" "webauthn" "mobile_push" ];
        default_2fa_method = "totp";
        totp = {
          disable = false;
          issuer = "sso.emile.space";
          algorithm = "sha1";
          digits = 6;
          period = 30;
          skew = 1;
          secret_size = 32;
        };

        ntp = {
          address = "time.cloudflare.com:123";
          version = 3;
          max_desync = "3s";
          disable_startup_check = false;
          disable_failure = false;
        };
      };
    };
  };
}