chore(koi): ecryptfs -> gocryptfs

hosts/koi/containers/navidrome/default.nix

@@ -37,7 +37,7 @@ in {
       "--group-add=${builtins.toString config.users.groups.geesefs.gid}"
     ];
   };
-  systemd.services.docker-navidrome.requires = [ "ecryptfs.service" ];
+  systemd.services.docker-navidrome.requires = [ "gocryptfs.service" ];
 
   systemd.tmpfiles.rules = [
     "d /srv/navidrome 0755 ${builtins.toString UID} ${builtins.toString UID} -"

hosts/koi/containers/sftpgo/default.nix

@@ -51,7 +51,7 @@ in {
       "${builtins.toString WEBDAV_PORT}:80"
     ];
   };
-  systemd.services.docker-sftpgo.requires = [ "ecryptfs.service" ];
+  systemd.services.docker-sftpgo.requires = [ "gocryptfs.service" ];
 
   systemd.tmpfiles.rules = [
     "d /srv/sftpgo/data 0700 ${builtins.toString UID} ${builtins.toString UID} -"

hosts/koi/containers/soulseek/default.nix

@@ -9,7 +9,7 @@ in {
     extraGroups = [ "geesefs" ];
   };
 
-  systemd.services.docker-slskd.requires = [ "ecryptfs.service" ];
+  systemd.services.docker-slskd.requires = [ "gocryptfs.service" ];
   virtualisation.oci-containers.containers.slskd = {
     image = "slskd/slskd:0.21.4.65534-9a68c184";
     volumes = [

hosts/koi/services/geesefs.nix

@@ -3,7 +3,7 @@
 {
   imports = [
     (abs "services/geesefs.nix")
-    (abs "services/ecryptfs.nix")
+    (abs "services/gocryptfs.nix")
   ];
 
   desu.secrets.geesefs-credentials = {};
@@ -40,12 +40,12 @@
     mountPoint = "/mnt/s3-desu-priv";
   };
 
-  services.ecryptfs = {
+  services.gocryptfs = {
     enable = true;
-    cipherDir = "/mnt/s3-desu-priv/encrypted";
-    passphrasePath = config.desu.secrets.desu-priv-passphrase.path;
-    masterKeyPath = "/mnt/s3-desu-priv/encrypted.key";
+    cipherDir = "/mnt/s3-desu-priv/encrypted-go";
     mountPoint = "/mnt/s3-desu-priv-encrypted";
+    passwordFile = config.desu.secrets.desu-priv-passphrase.path;
+    extraOptions = [ "-allow_other" ];
   };
-  systemd.services.ecryptfs-setup.requires = [ "geesefs.service" ];
+  systemd.services.gocryptfs.requires = [ "geesefs.service" ];
 }

services/ecryptfs.nix

@@ -1,122 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-{
-  # todo: ideally we should support multiple encrypted directories
-  options.services.ecryptfs = with lib; {
-    enable = mkEnableOption "ecryptfs";
-    package = mkOption {
-      type = types.package;
-      default = pkgs.ecryptfs;
-      defaultText = "pkgs.ecryptfs";
-      description = "ecryptfs package";
-    };
-    serviceName = mkOption {
-      type = types.str;
-      default = "ecryptfs";
-      description = "ecryptfs service name";
-    };
-
-    cipherDir = mkOption {
-      type = types.str;
-      description = "path to the directory used as the underlying encrypted storage";
-    };
-
-    passphrasePath = mkOption {
-      type = types.str;
-      description = "path to the file containing the passphrase (this can be rotated down the line without needing to re-encrypt the data)";
-    };
-
-    masterKeyPath = mkOption {
-      type = types.str;
-      description = "path to the master key (i.e. the wrapped passphrase file)";
-    };
-
-    mountPoint = mkOption {
-      type = types.str;
-      description = "ecryptfs mount point";
-    };
-
-    encryptFilenames = mkOption {
-      type = types.bool;
-      default = true;
-      description = "whether to encrypt filenames";
-    };
-
-    encryptionKeySize = mkOption {
-      type = types.int;
-      default = 32;
-      description = "size of the encryption key in bytes";
-    };
-
-    extraOptions = mkOption {
-      type = types.listOf types.str;
-      default = [ ];
-      description = "additional options to pass to ecryptfs";
-    };
-  };
-
-  config = let 
-    cfg = config.services.ecryptfs;
-
-    mountOptions = 
-      [ 
-        "ecryptfs_sig=$sig"
-        "ecryptfs_key_bytes=${toString cfg.encryptionKeySize}"
-        "ecryptfs_cipher=aes"
-        "ecryptfs_unlink_sigs"
-        "no_sig_cache"
-      ] ++
-      (lib.optional cfg.encryptFilenames "ecryptfs_fnek_sig=$sig") ++
-      cfg.extraOptions;
-  in {
-    systemd.services.${cfg.serviceName} = {
-      description = "${cfg.serviceName} setup";
-      wantedBy = [ "multi-user.target" ];
-      path = [ cfg.package pkgs.keyutils ];
-      serviceConfig = {
-        User = "root";
-        Group = "root";
-        Type = "oneshot";
-        RemainAfterExit = true;
-        ExecStop = "${pkgs.utillinux}/bin/umount ${lib.escapeShellArg cfg.mountPoint}";
-      };
-      script = ''
-        set -euo pipefail
-        if [ ! -f ${lib.escapeShellArg cfg.masterKeyPath} ]; then
-          echo "master key file ${cfg.masterKeyPath} does not exist, generating..."
-          passphrase=$(${pkgs.coreutils}/bin/head -c 48 /dev/random | base64)
-          wrapping_passphrase=$(cat ${lib.escapeShellArg cfg.passphrasePath})
-          printf "%s\n%s" "$passphrase" "$wrapping_passphrase" | ecryptfs-wrap-passphrase ${lib.escapeShellArg cfg.masterKeyPath} -
-        fi
-
-        if [ ! -d ${lib.escapeShellArg cfg.cipherDir} ]; then
-          echo "ecryptfs: directory ${lib.escapeShellArg cfg.cipherDir} does not exist"
-          exit 1
-        fi
-
-        if [ ! -d ${lib.escapeShellArg cfg.mountPoint} ]; then
-          mkdir -p ${lib.escapeShellArg cfg.mountPoint}
-        fi
-
-        result=$(cat ${lib.escapeShellArg cfg.passphrasePath} | ecryptfs-insert-wrapped-passphrase-into-keyring ${lib.escapeShellArg cfg.masterKeyPath} -)
-        sig=$(echo "$result" | sed -r 's/^.*sig \[(.*)\] into.*$/\1/')
-
-        if [ -z "$sig" ]; then
-          echo "failed to extract signature"
-          echo "$result"
-          exit 1
-        fi
-
-        echo "Keyring signature: $sig"
-
-        if ! keyctl show | grep -q "_uid.0"; then
-          # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870126
-          # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870335
-          keyctl link @u @s
-        fi
-
-        ${pkgs.utillinux}/bin/mount -i -t ecryptfs ${lib.escapeShellArg cfg.cipherDir} ${lib.escapeShellArg cfg.mountPoint} -o "${lib.concatStringsSep "," mountOptions}"
-      '';
-    };
-  };
-}

services/gocryptfs.nix

@@ -0,0 +1,84 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # todo: ideally we should support multiple encrypted directories
+  options.services.gocryptfs = with lib; {
+    enable = mkEnableOption "gocryptfs";
+    package = mkOption {
+      type = types.package;
+      default = pkgs.gocryptfs;
+      defaultText = "pkgs.gocryptfs";
+      description = "gocryptfs package";
+    };
+    serviceName = mkOption {
+      type = types.str;
+      default = "gocryptfs";
+      description = "gocryptfs service name";
+    };
+
+    passwordFile = mkOption {
+      type = types.str;
+      description = "path to the file containing the password";
+    };
+
+    cipherDir = mkOption {
+      type = types.str;
+      description = "path to the directory used as the underlying encrypted storage";
+    };
+
+    mountPoint = mkOption {
+      type = types.str;
+      description = "gocryptfs mount point";
+    };
+
+    extraInitOptions = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+      description = "additional options to pass to gocryptfs -init";
+    };
+    
+    extraOptions = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+      description = "additional options to pass to gocryptfs mount";
+    };
+  };
+
+  config = let 
+    cfg = config.services.gocryptfs;
+  in {
+    systemd.services.${cfg.serviceName} = {
+      description = "${cfg.serviceName} daemon";
+      wantedBy = [ "multi-user.target" ];
+      path = [ cfg.package ];
+      serviceConfig = {
+        User = "root";
+        Group = "root";
+      };
+      script = ''
+        set -euo pipefail
+
+        if [ ! -d ${lib.escapeShellArg cfg.cipherDir} ]; then
+          echo "gocryptfs: directory ${lib.escapeShellArg cfg.cipherDir} does not exist"
+          exit 1
+        fi
+
+        if [ ! -f ${lib.escapeShellArg cfg.cipherDir}/gocryptfs.conf ]; then
+          echo "gocryptfs: running gocryptfs -init"
+          gocryptfs -init \
+            -passfile ${lib.escapeShellArg cfg.passwordFile} \
+            ${builtins.concatStringsSep " " (map lib.escapeShellArg cfg.extraInitOptions)} \
+            ${lib.escapeShellArg cfg.cipherDir}
+        fi
+
+        if [ ! -d ${lib.escapeShellArg cfg.mountPoint} ]; then
+          mkdir -p ${lib.escapeShellArg cfg.mountPoint}
+        fi
+
+        gocryptfs -fg -passfile ${lib.escapeShellArg cfg.passwordFile} \
+          ${builtins.concatStringsSep " " (map lib.escapeShellArg cfg.extraOptions)} \
+          ${lib.escapeShellArg cfg.cipherDir} ${lib.escapeShellArg cfg.mountPoint}
+      '';
+    };
+  };
+}