Fix uploading world images

Dotnet/AppApi/Cef/ImageUploading.cs

@@ -0,0 +1,33 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using librsync.net;
+
+namespace VRCX;
+
+public partial class AppApi
+{
+    public string MD5File(string blob)
+    {
+        var fileData = Convert.FromBase64CharArray(blob.ToCharArray(), 0, blob.Length);
+        using var md5 = MD5.Create();
+        var md5Hash = md5.ComputeHash(fileData);
+        return Convert.ToBase64String(md5Hash);
+    }
+
+    public string SignFile(string blob)
+    {
+        var fileData = Convert.FromBase64String(blob);
+        using var sig = Librsync.ComputeSignature(new MemoryStream(fileData));
+        using var memoryStream = new MemoryStream();
+        sig.CopyTo(memoryStream);
+        var sigBytes = memoryStream.ToArray();
+        return Convert.ToBase64String(sigBytes);
+    }
+
+    public string FileLength(string blob)
+    {
+        var fileData = Convert.FromBase64String(blob);
+        return fileData.Length.ToString();
+    }
+}

Dotnet/AppApi/Common/AppApiCommon.cs

@@ -28,14 +28,6 @@ namespace VRCX
             }
         };
 
-        public string MD5File(string blob)
-        {
-            var fileData = Convert.FromBase64CharArray(blob.ToCharArray(), 0, blob.Length);
-            using var md5 = MD5.Create();
-            var md5Hash = md5.ComputeHash(fileData);
-            return Convert.ToBase64String(md5Hash);
-        }
-
         public int GetColourFromUserID(string userId)
         {
             var hash = _hasher.ComputeHash(Encoding.UTF8.GetBytes(userId));

Dotnet/VRCX-Cef.csproj

@@ -61,6 +61,14 @@
     <EmbeddedResource Remove="DBMerger\**" />
     <None Remove="DBMerger\**" />
   </ItemGroup>
+  <ItemGroup>
+	  <Reference Include="Blake2Sharp">
+		  <HintPath>libs\Blake2Sharp.dll</HintPath>
+	  </Reference>
+	  <Reference Include="librsync.net">
+		  <HintPath>libs\librsync.net.dll</HintPath>
+	  </Reference>
+  </ItemGroup>
   <ItemGroup>
     <None Include="app.manifest" />
     <None Include="..\Version">

Dotnet/libs/README.md

@@ -1,3 +1,11 @@
+### librsync.net.dll
+
+- [https://github.com/braddodson/librsync.net](https://github.com/braddodson/librsync.net)
+
+### Blake2Sharp.dll
+
+- [https://github.com/BLAKE2/BLAKE2/tree/master/csharp](https://github.com/BLAKE2/BLAKE2/tree/master/csharp)
+
 ### openvr_api.dll
 
 - [https://github.com/ValveSoftware/openvr](https://github.com/ValveSoftware/openvr)