modules/private/certificates.nix

   1 { lib, pkgs, config, name, ... }:
   2 {
   3   options.myServices.certificates = {
   4     enable = lib.mkEnableOption "enable certificates";
   5     certConfig = lib.mkOption {
   6       default = {
   7         webroot = "/var/lib/acme/acme-challenges";
   8         email = "ismael@bouya.org";
   9         postRun = builtins.concatStringsSep "\n" [
  10           (lib.optionalString config.services.httpd.Prod.enable "systemctl reload httpdProd.service")
  11           (lib.optionalString config.services.httpd.Tools.enable "systemctl reload httpdTools.service")
  12           (lib.optionalString config.services.httpd.Inte.enable "systemctl reload httpdInte.service")
  13           (lib.optionalString config.services.nginx.enable "systemctl reload nginx.service")
  14         ];
  15       };
  16       description = "Default configuration for certificates";
  17     };
  18   };
  19
  20   config = lib.mkIf config.myServices.certificates.enable {
  21     services.duplyBackup.profiles.system.excludeFile = ''
  22       + /var/lib/acme/acme-challenges
  23       '';
  24     services.nginx = {
  25       recommendedTlsSettings = true;
  26       virtualHosts = {
  27         "${config.hostEnv.fqdn}" = {
  28           acmeRoot = config.security.acme.certs."${name}".webroot;
  29           useACMEHost = name;
  30           forceSSL = true;
  31         };
  32       };
  33     };
  34     services.websites.certs = config.myServices.certificates.certConfig;
  35     myServices.databasesCerts = config.myServices.certificates.certConfig;
  36     myServices.ircCerts = config.myServices.certificates.certConfig;
  37
  38     security.acme.acceptTerms = true;
  39     security.acme.preliminarySelfsigned = true;
  40
  41     security.acme.certs = {
  42       "${name}" = config.myServices.certificates.certConfig // {
  43         domain = config.hostEnv.fqdn;
  44       };
  45     };
  46
  47     systemd.services = lib.attrsets.mapAttrs' (k: v:
  48       lib.attrsets.nameValuePair "acme-selfsigned-${k}" { script = lib.mkBefore ''
  49         cp $workdir/server.crt ${config.security.acme.certs."${k}".directory}/cert.pem
  50         chown '${v.user}:${v.group}' ${config.security.acme.certs."${k}".directory}/cert.pem
  51         chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.certs."${k}".directory}/cert.pem
  52
  53         cp $workdir/ca.crt ${config.security.acme.certs."${k}".directory}/chain.pem
  54         chown '${v.user}:${v.group}' ${config.security.acme.certs."${k}".directory}/chain.pem
  55         chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.certs."${k}".directory}/chain.pem
  56         '';
  57       }
  58     ) config.security.acme.certs //
  59     lib.attrsets.mapAttrs' (k: data:
  60       lib.attrsets.nameValuePair "acme-${k}" {
  61         serviceConfig.ExecStartPre =
  62           let
  63             script = pkgs.writeScript "acme-pre-start" ''
  64               #!${pkgs.runtimeShell} -e
  65               mkdir -p '${data.webroot}/.well-known/acme-challenge'
  66               chmod a+w '${data.webroot}/.well-known/acme-challenge'
  67               #doesn't work for multiple concurrent runs
  68               #chown -R '${data.user}:${data.group}' '${data.webroot}/.well-known/acme-challenge'
  69             '';
  70           in
  71             "+${script}";
  72       }
  73     ) config.security.acme.certs //
  74     {
  75       httpdProd = lib.mkIf config.services.httpd.Prod.enable
  76         { after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
  77       httpdTools = lib.mkIf config.services.httpd.Tools.enable
  78         { after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
  79       httpdInte = lib.mkIf config.services.httpd.Inte.enable
  80         { after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
  81     };
  82   };
  83 }