From 9124e6463a5ead6ab577f6764ef6493d58ac51e7 Mon Sep 17 00:00:00 2001
From: bird_egop <sampletext32@bk.ru>
Date: Fri, 15 Nov 2024 14:30:06 +0300
Subject: [PATCH] nl unpacker

---
 NLUnpacker/NLUnpacker.csproj | 10 ++++
 NLUnpacker/Program.cs        | 93 ++++++++++++++++++++++++++++++++++++
 ParkanPlayground.sln         |  6 +++
 3 files changed, 109 insertions(+)
 create mode 100644 NLUnpacker/NLUnpacker.csproj
 create mode 100644 NLUnpacker/Program.cs

diff --git a/NLUnpacker/NLUnpacker.csproj b/NLUnpacker/NLUnpacker.csproj
new file mode 100644
index 0000000..2f4fc77
--- /dev/null
+++ b/NLUnpacker/NLUnpacker.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>
diff --git a/NLUnpacker/Program.cs b/NLUnpacker/Program.cs
new file mode 100644
index 0000000..b54b3c3
--- /dev/null
+++ b/NLUnpacker/Program.cs
@@ -0,0 +1,93 @@
+using System.Buffers.Binary;
+using System.Runtime.CompilerServices;
+
+// ПОКА НЕ ПОНЯТНО КАК ОНО КОДИРУЕТСЯ
+
+// using var fs = new FileStream("gamefont.rlb", FileMode.Open, FileAccess.ReadWrite);
+//
+// int fileCount, c, i;
+// byte b, n;
+//
+// fs.Seek(4, SeekOrigin.Current);
+//
+// Span<byte> buf2 = stackalloc byte[2];
+// Span<byte> buf4 = stackalloc byte[4];
+//
+// fs.ReadExactly(buf2);
+//
+// fileCount = BinaryPrimitives.ReadInt16LittleEndian(buf2);
+//
+// fs.Seek(16 - 2, SeekOrigin.Current);
+//
+// b = (byte) fs.ReadByte();
+// c = (byte) fs.ReadByte();
+//
+// fs.Seek(12 - 2, SeekOrigin.Current);
+//
+// Span<byte> buf1 = stackalloc byte[1];
+//
+// if (32 * fileCount > 0)
+// {
+//     for (i = 0; i < 32 * fileCount; ++i)
+//     {
+//         b = (byte) ((b * 2) ^ c);
+//         n = (byte) c;
+//         c = (int) ((n >> 1) ^ b);
+//
+//         // Read, modify, and write the byte at the current position
+//         byte originalByte = (byte) fs.ReadByte();
+//         fs.Seek(-1, SeekOrigin.Current); // Move back one byte to overwrite it
+//         buf1[0] = (byte) (originalByte ^ b);
+//         fs.Write(buf1);
+//     }
+// }
+
+int v40 = 0;
+var flags = 0;
+var file_bytes = File.ReadAllBytes("gamefont.rlb");
+var FileSize = file_bytes.Length;
+var file_bytes_copy = file_bytes;
+var v8 = flags;
+if ((flags & 2) != 0)
+{
+    if (file_bytes[FileSize - 6] != 'A' && file_bytes[FileSize - 5] != 'O')
+        throw new Exception("4");
+    v40 = BinaryPrimitives.ReadInt32LittleEndian(
+        file_bytes.Skip(FileSize - 4)
+            .Take(4)
+            .ToArray()
+    );
+}
+
+if (file_bytes[0] != (byte)'N' || file_bytes[1] != (byte)'L' || file_bytes[2] != 0 || file_bytes[3] != 1)
+    throw new Exception("4");
+var file_count = BinaryPrimitives.ReadInt16LittleEndian(
+    file_bytes.Skip(4)
+        .Take(2)
+        .ToArray()
+);
+var file_count_copy = file_count;
+var section_mem_ptr = new byte[32 * file_count];
+
+var section_count = 0;
+var sixth_byte = file_bytes_copy[5];
+var sixth_byte_shifted_by_1_byte = file_bytes_copy[5] >> 8;
+if (32 * file_count > 0)
+{
+    do
+    {
+        sixth_byte = (byte) (sixth_byte_shifted_by_1_byte ^ (2 * sixth_byte));
+        sixth_byte_shifted_by_1_byte = sixth_byte ^ (sixth_byte_shifted_by_1_byte >> 1);
+        section_mem_ptr[section_count] = (byte) (sixth_byte ^ file_bytes_copy[section_count + 32]);
+        ++section_count;
+    } while (section_count < 32 * file_count);
+
+    v8 = flags;
+}
+
+for (var i = 0; i < section_mem_ptr.Length; i++)
+{
+    
+}
+
+File.WriteAllBytes("gamefont-dump.rlb", file_bytes);
\ No newline at end of file
diff --git a/ParkanPlayground.sln b/ParkanPlayground.sln
index 6b21db4..d0ae5da 100644
--- a/ParkanPlayground.sln
+++ b/ParkanPlayground.sln
@@ -4,6 +4,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ParkanPlayground", "ParkanP
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TextureDecoder", "TextureDecoder\TextureDecoder.csproj", "{15D1C9ED-1080-417D-A4D1-CFF80BE6A218}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NLUnpacker", "NLUnpacker\NLUnpacker.csproj", "{50C83E6C-23ED-4A8E-B948-89686A742CF0}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -18,5 +20,9 @@ Global
 		{15D1C9ED-1080-417D-A4D1-CFF80BE6A218}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{15D1C9ED-1080-417D-A4D1-CFF80BE6A218}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{15D1C9ED-1080-417D-A4D1-CFF80BE6A218}.Release|Any CPU.Build.0 = Release|Any CPU
+		{50C83E6C-23ED-4A8E-B948-89686A742CF0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{50C83E6C-23ED-4A8E-B948-89686A742CF0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{50C83E6C-23ED-4A8E-B948-89686A742CF0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{50C83E6C-23ED-4A8E-B948-89686A742CF0}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal