Initial commit

2025-02-20 16:33:04 +01:00
commit f20cf222a8
36 changed files with 4758 additions and 0 deletions
--- a/MetroUnlocker/LibTSForge/PhysicalStore/CRCBlock.cs
+++ b/MetroUnlocker/LibTSForge/PhysicalStore/CRCBlock.cs
@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.IO;
+
+namespace MetroUnlocker.LibTSForge.PhysicalStore
+{
+    public enum CRCBlockType : uint
+    {
+        UINT = 1 << 0,
+        STRING = 1 << 1,
+        BINARY = 1 << 2
+    }
+
+    public class CRCBlock
+    {
+        public CRCBlockType DataType;
+        public byte[] Key;
+        public string KeyAsStr
+        {
+            get
+            {
+                return Utils.DecodeString(Key);
+            }
+            set
+            {
+                Key = Utils.EncodeString(value);
+            }
+        }
+        public byte[] Value;
+        public string ValueAsStr
+        {
+            get
+            {
+                return Utils.DecodeString(Value);
+            }
+            set
+            {
+                Value = Utils.EncodeString(value);
+            }
+        }
+        public uint ValueAsInt
+        {
+            get
+            {
+                return BitConverter.ToUInt32(Value, 0);
+            }
+            set
+            {
+                Value = BitConverter.GetBytes(value);
+            }
+        }
+
+        public void Encode(BinaryWriter writer)
+        {
+            uint crc = CRC();
+            writer.Write(crc);
+            writer.Write((uint)DataType);
+            writer.Write(Key.Length);
+            writer.Write(Value.Length);
+
+            writer.Write(Key);
+            writer.Align(8);
+
+            writer.Write(Value);
+            writer.Align(8);
+        }
+
+        public static CRCBlock Decode(BinaryReader reader)
+        {
+            uint crc = reader.ReadUInt32();
+            uint type = reader.ReadUInt32();
+            uint lenName = reader.ReadUInt32();
+            uint lenVal = reader.ReadUInt32();
+
+            byte[] key = reader.ReadBytes((int)lenName);
+
+            reader.Align(8);
+
+            byte[] value = reader.ReadBytes((int)lenVal);
+            reader.Align(8);
+
+            CRCBlock block = new CRCBlock
+            {
+                DataType = (CRCBlockType)type,
+                Key = key,
+                Value = value,
+            };
+
+            if (block.CRC() != crc)
+            {
+                throw new InvalidDataException("Invalid CRC in variable bag.");
+            }
+
+            return block;
+        }
+
+        public uint CRC()
+        {
+            BinaryWriter wtemp = new BinaryWriter(new MemoryStream());
+            wtemp.Write(0);
+            wtemp.Write((uint)DataType);
+            wtemp.Write(Key.Length);
+            wtemp.Write(Value.Length);
+            wtemp.Write(Key);
+            wtemp.Write(Value);
+            return Utils.CRC32(((MemoryStream)wtemp.BaseStream).ToArray());
+        }
+    }
+}