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Add fallback to invalid compressed int in BlobReader

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This commit is contained in:
LukeFZ
2024-02-25 15:24:09 +01:00
parent e328ed9b84
commit eababc31f3
1 changed files with 45 additions and 14 deletions
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59
Il2CppInspector.Common/Utils/BlobReader.cs
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@@ -2,6 +2,7 @@
using System.Text;
using System;
using System.Diagnostics;
using System.IO;
namespace Il2CppInspector.Utils;
@@ -33,14 +34,10 @@ public static class BlobReader
value = blob.ReadInt16();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U4:
value = blob.Version >= 29
? blob.ReadCompressedUInt32()
: blob.ReadUInt32();
value = ReadUInt32();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I4:
value = blob.Version >= 29
? blob.ReadCompressedInt32()
: blob.ReadInt32();
value = ReadInt32();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U8:
value = blob.ReadUInt64();
@@ -55,19 +52,13 @@ public static class BlobReader
value = blob.ReadDouble();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_STRING:
var uiLen = blob.Version >= 29
? blob.ReadCompressedInt32()
: blob.ReadInt32();
var uiLen = ReadInt32();
if (uiLen != -1)
value = Encoding.UTF8.GetString(blob.ReadBytes(uiLen));
break;
case Il2CppTypeEnum.IL2CPP_TYPE_SZARRAY:
var length = blob.Version >= 29
? blob.ReadCompressedInt32()
: blob.ReadInt32();
var length = ReadInt32();
if (length == -1)
break;
@@ -117,6 +108,46 @@ public static class BlobReader
}
return value;
int ReadInt32()
{
if (blob.Version >= 29)
{
var address = blob.Position;
try
{
return blob.ReadCompressedInt32();
}
catch (InvalidDataException)
{
Console.WriteLine($"Found invalid compressed int at metadata address 0x{address:x8}. Reading as normal int.");
return blob.ReadInt32(address);
}
}
return blob.ReadInt32();
}
uint ReadUInt32()
{
if (blob.Version >= 29)
{
var address = blob.Position;
try
{
return blob.ReadCompressedUInt32();
}
catch (InvalidDataException)
{
Console.WriteLine($"Found invalid compressed uint at metadata address 0x{address:x8}. Reading as normal uint.");
return blob.ReadUInt32(address);
}
}
return blob.ReadUInt32();
}
}
public static Il2CppTypeEnum ReadEncodedTypeEnum(Il2CppInspector inspector, BinaryObjectStream blob,