X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=modules%2Fprivate%2Fcertificates.nix;h=c568783b622c17ecb32ca43257070e6daaa3d50e;hb=cfda3cfc35445979225850f686f338e6d4ace372;hp=9de3e6d7b1c82cdae432f6e72a7f6b05b655dad7;hpb=8415083eb6acc343dfa404dbbc12fa0171a48a20;p=perso%2FImmae%2FConfig%2FNix.git

diff --git a/modules/private/certificates.nix b/modules/private/certificates.nix
index 9de3e6d..c568783 100644
--- a/modules/private/certificates.nix
+++ b/modules/private/certificates.nix
@@ -1,56 +1,189 @@
-{ lib, pkgs, config,  ... }:
+{ lib, pkgs, config, name, ... }:
 {
   options.myServices.certificates = {
     enable = lib.mkEnableOption "enable certificates";
+    webroot = lib.mkOption {
+      readOnly = true;
+      default = "/var/lib/acme/acme-challenges";
+    };
     certConfig = lib.mkOption {
       default = {
-        webroot = "${config.security.acme.directory}/acme-challenge";
+        webroot = lib.mkForce null; # avoids creation of tmpfiles
         email = "ismael@bouya.org";
-        postRun = ''
-          systemctl reload httpdTools.service httpdInte.service httpdProd.service
-        '';
-        plugins = [ "cert.pem" "chain.pem" "fullchain.pem" "full.pem" "key.pem" "account_key.json" ];
+        postRun = builtins.concatStringsSep "\n" [
+          (lib.optionalString config.services.httpd.Prod.enable "systemctl reload httpdProd.service")
+          (lib.optionalString config.services.httpd.Tools.enable "systemctl reload httpdTools.service")
+          (lib.optionalString config.services.httpd.Inte.enable "systemctl reload httpdInte.service")
+          (lib.optionalString config.services.nginx.enable "systemctl reload nginx.service")
+        ];
+        extraLegoRenewFlags = [ "--reuse-key" ];
+        keyType = lib.mkDefault "ec256"; # https://github.com/NixOS/nixpkgs/pull/83121
       };
       description = "Default configuration for certificates";
     };
   };
 
   config = lib.mkIf config.myServices.certificates.enable {
-    services.backup.profiles.system.excludeFile = ''
-      + ${config.security.acme.directory}
+    services.duplyBackup.profiles.system.excludeFile = ''
+      + ${config.myServices.certificates.webroot}
       '';
+    services.nginx = {
+      recommendedTlsSettings = true;
+      virtualHosts = {
+        "${config.hostEnv.fqdn}" = {
+          acmeRoot = config.myServices.certificates.webroot;
+          useACMEHost = name;
+          forceSSL = true;
+        };
+      };
+    };
     services.websites.certs = config.myServices.certificates.certConfig;
     myServices.databasesCerts = config.myServices.certificates.certConfig;
     myServices.ircCerts = config.myServices.certificates.certConfig;
 
+    security.acme.acceptTerms = true;
     security.acme.preliminarySelfsigned = true;
 
     security.acme.certs = {
-      "eldiron" = config.myServices.certificates.certConfig // {
-        domain = "eldiron.immae.eu";
+      "${name}" = config.myServices.certificates.certConfig // {
+        domain = config.hostEnv.fqdn;
       };
     };
 
+    users.users.acme = {
+      uid = config.ids.uids.acme;
+      group = "acme";
+      description = "Acme user";
+    };
+    users.groups.acme = {
+      gid = config.ids.gids.acme;
+    };
+
     systemd.services = lib.attrsets.mapAttrs' (k: v:
-      lib.attrsets.nameValuePair "acme-selfsigned-${k}" (lib.mkBefore { script =
-        (lib.optionalString (builtins.elem "cert.pem" v.plugins) ''
-        cp $workdir/server.crt ${config.security.acme.directory}/${k}/cert.pem
-        chown '${v.user}:${v.group}' ${config.security.acme.directory}/${k}/cert.pem
-        chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.directory}/${k}/cert.pem
-        '') +
-        (lib.optionalString (builtins.elem "chain.pem" v.plugins) ''
-        cp $workdir/ca.crt ${config.security.acme.directory}/${k}/chain.pem
-        chown '${v.user}:${v.group}' ${config.security.acme.directory}/${k}/chain.pem
-        chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.directory}/${k}/chain.pem
-        '')
-      ; })
-    ) config.security.acme.certs // {
-      httpdProd.after = [ "acme-selfsigned-certificates.target" ];
-      httpdProd.wants = [ "acme-selfsigned-certificates.target" ];
-      httpdTools.after = [ "acme-selfsigned-certificates.target" ];
-      httpdTools.wants = [ "acme-selfsigned-certificates.target" ];
-      httpdInte.after = [ "acme-selfsigned-certificates.target" ];
-      httpdInte.wants = [ "acme-selfsigned-certificates.target" ];
+      lib.attrsets.nameValuePair "acme-selfsigned-${k}" {
+          wantedBy = [ "acme-selfsigned-certificates.target" ];
+          script = lib.mkAfter ''
+          cp $workdir/server.crt ${config.security.acme.certs."${k}".directory}/cert.pem
+          chown '${v.user}:${v.group}' ${config.security.acme.certs."${k}".directory}/cert.pem
+          chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.certs."${k}".directory}/cert.pem
+
+          cp $workdir/ca.crt ${config.security.acme.certs."${k}".directory}/chain.pem
+          chown '${v.user}:${v.group}' ${config.security.acme.certs."${k}".directory}/chain.pem
+          chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.certs."${k}".directory}/chain.pem
+          '';
+        }
+      ) config.security.acme.certs //
+    lib.attrsets.mapAttrs' (k: data:
+      lib.attrsets.nameValuePair "acme-${k}" {
+        after = lib.mkAfter [ "bind.service" ];
+        serviceConfig =
+          let
+            cfg = config.security.acme;
+            hashOptions = let
+              domains = builtins.concatStringsSep "," (
+                [ data.domain ] ++ (builtins.attrNames data.extraDomains)
+              );
+              certOptions = builtins.concatStringsSep "," [
+                (if data.ocspMustStaple then "must-staple" else "no-must-staple")
+              ];
+            in
+              builtins.hashString "sha256" (builtins.concatStringsSep ";" [ data.keyType domains certOptions ]);
+            accountsDir = "accounts-${data.keyType}";
+            lpath = "acme/${k}";
+            apath = "/var/lib/${lpath}";
+            spath = "/var/lib/acme/.lego/${k}";
+            fileMode = if data.allowKeysForGroup then "640" else "600";
+            dirFileMode = if data.allowKeysForGroup then "750" else "700";
+            globalOpts = [ "-d" data.domain "--email" data.email "--path" "." "--key-type" data.keyType ]
+              ++ lib.optionals (cfg.acceptTerms) [ "--accept-tos" ]
+              ++ lib.optionals (data.dnsProvider != null && !data.dnsPropagationCheck) [ "--dns.disable-cp" ]
+              ++ lib.concatLists (lib.mapAttrsToList (name: root: [ "-d" name ]) data.extraDomains)
+              ++ (if data.dnsProvider != null then [ "--dns" data.dnsProvider ] else [ "--http" "--http.webroot" config.myServices.certificates.webroot ])
+              ++ lib.optionals (cfg.server != null || data.server != null) ["--server" (if data.server == null then cfg.server else data.server)];
+            certOpts = lib.optionals data.ocspMustStaple [ "--must-staple" ];
+            runOpts = lib.escapeShellArgs (globalOpts ++ [ "run" ] ++ certOpts);
+            renewOpts = lib.escapeShellArgs (globalOpts ++
+              [ "renew" "--days" (builtins.toString cfg.validMinDays) ] ++
+              certOpts ++ data.extraLegoRenewFlags);
+            forceRenewOpts = lib.escapeShellArgs (globalOpts ++
+              [ "renew" "--days" "999" ] ++
+              certOpts ++ data.extraLegoRenewFlags);
+            keyName = builtins.replaceStrings ["*"] ["_"] data.domain;
+          in {
+            User = lib.mkForce "acme";
+            Group = lib.mkForce "acme";
+            WorkingDirectory = lib.mkForce spath;
+            StateDirectory = lib.mkForce "acme/.lego/${k} acme/.lego/${accountsDir}";
+            ExecStartPre =
+              let
+                script = pkgs.writeScript "acme-prestart" ''
+                  #!${pkgs.runtimeShell} -e
+                  install -m 0755 -o acme -g acme -d ${config.myServices.certificates.webroot}
+                '';
+              in
+                lib.mkForce "+${script}";
+            ExecStart = lib.mkForce (pkgs.writeScript "acme-start" ''
+              #!${pkgs.runtimeShell} -e
+              # lego doesn't check key type after initial creation, we
+              # need to check for him
+              if [ -L ${spath}/accounts -o -d ${spath}/accounts ]; then
+                if [ -L ${spath}/accounts -a "$(readlink ${spath}/accounts)" != ../${accountsDir} ]; then
+                  ln -sfn ../${accountsDir} ${spath}/accounts
+                  mv -f ${spath}/certificates/${keyName}.key ${spath}/certificates/${keyName}.key.old
+                fi
+              else
+                ln -s ../${accountsDir} ${spath}/accounts
+              fi
+              # check if domain changed: lego doesn't check by itself
+              if [ ! -e ${spath}/certificates/${keyName}.crt -o ! -e ${spath}/certificates/${keyName}.key -o ! -e "${spath}/accounts/acme-v02.api.letsencrypt.org/${data.email}/account.json" ]; then
+                ${pkgs.lego}/bin/lego ${runOpts}
+              elif [ ! -f ${spath}/currentDomains -o "$(cat ${spath}/currentDomains)" != "${hashOptions}" ]; then
+                ${pkgs.lego}/bin/lego ${forceRenewOpts}
+              else
+                ${pkgs.lego}/bin/lego ${renewOpts}
+              fi
+            '');
+            ExecStartPost =
+              let
+                script = pkgs.writeScript "acme-post-start" ''
+                  #!${pkgs.runtimeShell} -e
+                  install -m 0755 -o root -g root -d /var/lib/acme
+                  install -m 0${dirFileMode} -o ${data.user} -g ${data.group} -d /var/lib/acme/${k}
+                  cd /var/lib/acme/${k}
+
+                  # Test that existing cert is older than new cert
+                  KEY=${spath}/certificates/${keyName}.key
+                  KEY_CHANGED=no
+                  if [ -e $KEY -a $KEY -nt key.pem ]; then
+                    KEY_CHANGED=yes
+                    cp -p ${spath}/certificates/${keyName}.key key.pem
+                    cp -p ${spath}/certificates/${keyName}.crt fullchain.pem
+                    cp -p ${spath}/certificates/${keyName}.issuer.crt chain.pem
+                    ln -sf fullchain.pem cert.pem
+                    cat key.pem fullchain.pem > full.pem
+                    echo -n "${hashOptions}" > ${spath}/currentDomains
+                  fi
+
+                  chmod ${fileMode} *.pem
+                  chown '${data.user}:${data.group}' *.pem
+
+                  if [ "$KEY_CHANGED" = "yes" ]; then
+                    : # noop in case postRun is empty
+                    ${data.postRun}
+                  fi
+                '';
+              in
+                lib.mkForce "+${script}";
+          };
+      }
+    ) config.security.acme.certs //
+    {
+      httpdProd = lib.mkIf config.services.httpd.Prod.enable
+        { after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
+      httpdTools = lib.mkIf config.services.httpd.Tools.enable
+        { after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
+      httpdInte = lib.mkIf config.services.httpd.Inte.enable
+        { after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
     };
   };
 }