add clearer permissions

shared/modules/services/dufs.nix

@@ -3,18 +3,34 @@
 let
   cfg = config.services.dufs;
 
-  # Helper to create auth arguments from user list
-  # Each user needs a separate -a flag
-  mkAuthArgs = users: readonlyUsers:
+  # User credential submodule
+  userCredential = lib.types.submodule {
+    options = {
+      username = lib.mkOption {
+        type = lib.types.str;
+        description = "Username for authentication";
+      };
+      passwordHash = lib.mkOption {
+        type = lib.types.str;
+        description = ''
+          SHA-512 password hash (generate with: mkpasswd -m sha-512)
+          Note: Must start with $6$ for dufs compatibility
+        '';
+      };
+    };
+  };
+
+  # Helper to create auth arguments for different permission levels
+  mkAuthArgs = rwUsers: roUsers:
     let
-      rwUsers = lib.concatMapStringsSep " "
+      writers = lib.concatMapStringsSep " "
         (user: "-a '${user.username}:${user.passwordHash}@/:rw'")
-        users;
-      roUsers = lib.concatMapStringsSep " "
+        rwUsers;
+      readers = lib.concatMapStringsSep " "
         (user: "-a '${user.username}:${user.passwordHash}@/:ro'")
-        readonlyUsers;
+        roUsers;
     in
-    "${rwUsers} ${roUsers}";
+    lib.concatStringsSep " " (lib.filter (s: s != "") [writers readers]);
 in
 {
   options.services.dufs = {
@@ -65,6 +81,12 @@ in
         description = "Bind address for public instance";
       };
 
+      users = lib.mkOption {
+        type = lib.types.listOf userCredential;
+        default = [];
+        description = "Users with read-write access";
+      };
+
       allowSearch = lib.mkOption {
         type = lib.types.bool;
         default = true;
@@ -88,55 +110,15 @@ in
       };
 
       users = lib.mkOption {
-        type = lib.types.listOf (lib.types.submodule {
-          options = {
-            username = lib.mkOption {
-              type = lib.types.str;
-              description = "Username for authentication";
-            };
-            passwordHash = lib.mkOption {
-              type = lib.types.str;
-              description = ''
-                SHA-512 password hash (generate with: mkpasswd -m sha-512)
-                Note: Must start with $6$ for dufs compatibility
-              '';
-            };
-          };
-        });
+        type = lib.types.listOf userCredential;
         default = [];
-        description = "List of users with read-write access";
-        example = [
-          {
-            username = "admin";
-            passwordHash = "$6$rounds=656000$...";
-          }
-        ];
+        description = "Users with read-write access";
       };
 
-      readonlyUsers = lib.mkOption {
-        type = lib.types.listOf (lib.types.submodule {
-          options = {
-            username = lib.mkOption {
-              type = lib.types.str;
-              description = "Username for authentication";
-            };
-            passwordHash = lib.mkOption {
-              type = lib.types.str;
-              description = ''
-                SHA-512 password hash (generate with: mkpasswd -m sha-512)
-                Note: Must start with $6$ for dufs compatibility
-              '';
-            };
-          };
-        });
+      guestUsers = lib.mkOption {
+        type = lib.types.listOf userCredential;
         default = [];
-        description = "List of users with read-only access";
-        example = [
-          {
-            username = "viewer";
-            passwordHash = "$6$rounds=656000$...";
-          }
-        ];
+        description = "Guest users with read-only access";
       };
 
       allowUpload = lib.mkOption {
@@ -192,12 +174,18 @@ in
         Type = "simple";
         User = cfg.user;
         Group = cfg.group;
-        ExecStart = ''
-          ${cfg.package}/bin/dufs ${cfg.servePathPublic} \
-            --bind ${cfg.publicInstance.bind} \
-            --port ${toString cfg.publicInstance.port} \
-            ${lib.optionalString cfg.publicInstance.allowSearch "--allow-search"}
-        '';
+        ExecStart =
+          let
+            hasAuth = (cfg.publicInstance.users != []);
+            authArgs = lib.optionalString hasAuth
+              (mkAuthArgs cfg.publicInstance.users []) + " -a @/"; # allows read only on all paths (public)
+          in ''
+            ${cfg.package}/bin/dufs ${cfg.servePathPublic} \
+              --bind ${cfg.publicInstance.bind} \
+              --port ${toString cfg.publicInstance.port} \
+              ${authArgs} \
+              ${lib.optionalString cfg.publicInstance.allowSearch "--allow-search"}
+          '';
         Restart = "on-failure";
         RestartSec = "10s";
 
@@ -224,7 +212,7 @@ in
           ${cfg.package}/bin/dufs ${cfg.servePathPrivate} \
             --bind ${cfg.privateInstance.bind} \
             --port ${toString cfg.privateInstance.port} \
-            ${mkAuthArgs cfg.privateInstance.users cfg.privateInstance.readonlyUsers} \
+            ${mkAuthArgs cfg.privateInstance.users cfg.privateInstance.guestUsers} \
             ${lib.optionalString cfg.privateInstance.allowUpload "--allow-upload"} \
             ${lib.optionalString cfg.privateInstance.allowDelete "--allow-delete"} \
             ${lib.optionalString cfg.privateInstance.allowSearch "--allow-search"}

shared/server-configuration.nix

@@ -182,38 +182,37 @@ in
       user = "kage";
       group = "users";
 
-      # Public read-only instance
+      # Public instance with admin/guest authentication
       publicInstance = {
         enable = true;
         port = 5000;
         allowSearch = true;
+        # Admin users can upload/modify on public instance
+        users = [
+          {
+            username = "nate";
+            passwordHash = "$6$lJDBaW7zzlaAlzbV$u.mzsKCDOCWdUffPlXhx9dWRgJsxOUJRKj5Z5/NMEPC2WfPT9x9W145rThogzFLhynIT7UkYXd4zYdnsrGPRS0"; # open
+          }
+        ];
       };
 
-      # Private read-write instance with authentication
+      # Private instance with admin/user/guest authentication
       privateInstance = {
         enable = true;
         port = 5001;
         allowUpload = true;
-        allowDelete = true;
+        allowDelete = false;
         allowSearch = true;
-        # Read-write users
         users = [
-          # Generate password hash with: mkpasswd -m sha-512
-          # These are temporary passwords and should be changed
           {
-            username = "nate";
-            passwordHash = "$6$eIqVeCL9q5GlN.Em$xm7RxNcGfArYFBprmnggt1zzDf.HluKwXcG9LsJNCK6.vnKGmQDb5b7h7g81tWY7jIDdPsgLu0jiTzbz1lFIC0";  # password
+            username = "user";
+            passwordHash = "$6$lJDBaW7zzlaAlzbV$u.mzsKCDOCWdUffPlXhx9dWRgJsxOUJRKj5Z5/NMEPC2WfPT9x9W145rThogzFLhynIT7UkYXd4zYdnsrGPRS0"; # open
           }
         ];
-        # Read-only users
-        readonlyUsers = [
+        guestUsers = [
           {
             username = "guest";
-            passwordHash = "$6$.Ot.4AWNRpx0LJ1s$M01RpAJ.VZWJfDrTlali.P0Fhnn0Ji.uP/fIdgZP0ly64g8AzeGb6/2C9dbKmnARdVV9M12mLmU6ENmUbR/ym1";  # guest
-          }
-          {
-            username = "readonly";
-            passwordHash = "$6$3Z5KK8mIbxN2tZR4$eCOpbwAKAk6CKMZWgWddgJaQyTDUkYzB0T8tNXfSUQkUL2A/QEXoEONcPaZnF/jfem9qB..Snm2xR/7GTkyVg.";  # readonly
+            passwordHash = "$6$.Ot.4AWNRpx0LJ1s$M01RpAJ.VZWJfDrTlali.P0Fhnn0Ji.uP/fIdgZP0ly64g8AzeGb6/2C9dbKmnARdVV9M12mLmU6ENmUbR/ym1"; # guest
           }
         ];
       };
@@ -235,7 +234,6 @@ in
       listenAddresses = [ "*:631" ];
       allowFrom = [ "all" ];
       browsing = true;
-      # browserAddress = "192.168.1.169:631";
       defaultShared = true;
       openFirewall = true;
     };