From 8dbb5300d6ebd215e1cfed1f971a68f28f16b34c Mon Sep 17 00:00:00 2001
From: n00mkrad <61149547+n00mkrad@users.noreply.github.com>
Date: Thu, 14 May 2026 01:40:22 +0200
Subject: [PATCH] Fix PseudoHash being able to generate invalid filenames

---
 CodeLegacy/Data/PseudoHash.cs | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/CodeLegacy/Data/PseudoHash.cs b/CodeLegacy/Data/PseudoHash.cs
index c45b0f6..68710be 100644
--- a/CodeLegacy/Data/PseudoHash.cs
+++ b/CodeLegacy/Data/PseudoHash.cs
@@ -11,18 +11,26 @@ namespace Flowframes.Data
         public static string GetHash(string path, bool b64 = true)
         {
             bool isDir = Directory.Exists(path);
+            string hash = "";
 
             if (isDir)
             {
                 var dir = new DirectoryInfo(path);
                 var files = IoUtils.GetFileInfosSorted(path);
-                string dirHash = $"{dir.Name}{files.Sum(f => f.Length)}{dir.LastWriteTime.ToString("yyyyMMddHHmmss")}";
-                return b64 ? Convert.ToBase64String(Encoding.UTF8.GetBytes(dirHash)).TrimEnd('=') : dirHash;
+                hash = $"{dir.Name}{files.Sum(f => f.Length)}{dir.LastWriteTime.ToString("yyyyMMddHHmmss")}";
+            }
+            else
+            {
+                var file = new FileInfo(path);
+                hash = $"{file.Name}{file.Length}{file.LastWriteTime.ToString("yyyyMMddHHmmss")}";
             }
 
-            var file = new FileInfo(path);
-            string hash = $"{file.Name}{file.Length}{file.LastWriteTime.ToString("yyyyMMddHHmmss")}";
-            return b64 ? Convert.ToBase64String(Encoding.UTF8.GetBytes(hash)).TrimEnd('=') : hash;
+            if (!b64)
+                return hash;
+
+            string hashB64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(hash));
+            hashB64 = new string(hashB64.TrimEnd('=').Where(c => !Path.GetInvalidFileNameChars().Contains(c)).ToArray()); // Ensure no invalid chars in b64 hash
+            return hashB64;
         }
     }
 }