unable to open game application when dragging to il2cppinspecter

[Hacking-Rushi]

/*
Copyright 2017 Perfare - https://github.com/Perfare/Il2CppDumper
Copyright 2017-2021 Katy Coe - http://www.djkaty.com - https://github.com/djkaty

All rights reserved.

*/

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using NoisyCowStudios.Bin2Object;

namespace Il2CppInspector
{
public class Metadata : BinaryObjectStream
{
public Il2CppGlobalMetadataHeader Header { get; set; }

    public Il2CppAssemblyDefinition[] Assemblies { get; set; }
    public Il2CppImageDefinition[] Images { get; set; }
    public Il2CppTypeDefinition[] Types { get; set; }
    public Il2CppMethodDefinition[] Methods { get; set; }
    public Il2CppParameterDefinition[] Params { get; set; }
    public Il2CppFieldDefinition[] Fields { get; set; }
    public Il2CppFieldDefaultValue[] FieldDefaultValues { get; set; }
    public Il2CppParameterDefaultValue[] ParameterDefaultValues { get; set; }
    public Il2CppPropertyDefinition[] Properties { get; set; }
    public Il2CppEventDefinition[] Events { get; set; }
    public Il2CppGenericContainer[] GenericContainers { get; set; }
    public Il2CppGenericParameter[] GenericParameters { get; set; }
    public Il2CppCustomAttributeTypeRange[] AttributeTypeRanges { get; set; }
    public Il2CppInterfaceOffsetPair[] InterfaceOffsets { get; set; }
    public Il2CppMetadataUsageList[] MetadataUsageLists { get; set; }
    public Il2CppMetadataUsagePair[] MetadataUsagePairs { get; set; }
    public Il2CppFieldRef[] FieldRefs { get; set; }

    public int[] InterfaceUsageIndices { get; set; }
    public int[] NestedTypeIndices { get; set; }
    public int[] AttributeTypeIndices { get; set; }
    public int[] GenericConstraintIndices { get; set; }
    public uint[] VTableMethodIndices { get; set; }
    public string[] StringLiterals { get; set; }

    public Dictionary<int, string> Strings { get; private set; } = new Dictionary<int, string>();

    // Set if something in the metadata has been modified / decrypted
    public bool IsModified { get; private set; } = false;

    // Status update callback
    private EventHandler<string> OnStatusUpdate { get; set; }
    private void StatusUpdate(string status) => OnStatusUpdate?.Invoke(this, status);

    // Initialize metadata object from a stream
    public static Metadata FromStream(MemoryStream stream, EventHandler<string> statusCallback = null) {
        // TODO: This should really be placed before the Metadata object is created,
        // but for now this ensures it is called regardless of which client is in use
        PluginHooks.LoadPipelineStarting();

        var metadata = new Metadata(statusCallback);
        stream.Position = 0;
        stream.CopyTo(metadata);
        metadata.Position = 0;
        metadata.Initialize();
        return metadata;
    }

    private Metadata(EventHandler<string> statusCallback = null) : base() => OnStatusUpdate = statusCallback;

    private void Initialize()
    {
        // Pre-processing hook
        var pluginResult = PluginHooks.PreProcessMetadata(this);
        IsModified = pluginResult.IsStreamModified;

        StatusUpdate("Processing metadata");

        // Read metadata header
        Header = ReadObject<Il2CppGlobalMetadataHeader>(0);

        // Check for correct magic bytes
        if (Header.signature != Il2CppConstants.MetadataSignature) {
            throw new InvalidOperationException("The supplied metadata file is not valid.");
        }

        // Set object versioning for Bin2Object from metadata version
        Version = Header.version;

        if (Version < 16 || Version > 27) {
            throw new InvalidOperationException($"The supplied metadata file is not of a supported version ({Header.version}).");
        }

        // Rewind and read metadata header with the correct version settings
        Header = ReadObject<Il2CppGlobalMetadataHeader>(0);

        // Sanity checking
        // Unity.IL2CPP.MetadataCacheWriter.WriteLibIl2CppMetadata always writes the metadata information in the same order it appears in the header,
        // with each block always coming directly after the previous block, 4-byte aligned. We can use this to check the integrity of the data and
        // detect sub-versions.

        // For metadata v24.0, the header can either be either 0x110 (24.0, 24.1) or 0x108 (24.2) bytes long. Since 'stringLiteralOffset' is the first thing
        // in the header after the sanity and version fields, and since it will always point directly to the first byte after the end of the header,
        // we can use this value to determine the actual header length and therefore narrow down the metadata version to 24.0/24.1 or 24.2.

        if (!pluginResult.SkipValidation) {
            var realHeaderLength = Header.stringLiteralOffset;

            if (realHeaderLength != Sizeof(typeof(Il2CppGlobalMetadataHeader))) {
                if (Version == 24.0) {
                    Version = 24.2;
                    Header = ReadObject<Il2CppGlobalMetadataHeader>(0);
                }
            }

            if (realHeaderLength != Sizeof(typeof(Il2CppGlobalMetadataHeader))) {
                throw new InvalidOperationException("Could not verify the integrity of the metadata file or accurately identify the metadata sub-version");
            }
        }
        
        // Load all the relevant metadata using offsets provided in the header
        if (Version >= 16)
            Images = ReadArray<Il2CppImageDefinition>(Header.imagesOffset, Header.imagesCount / Sizeof(typeof(Il2CppImageDefinition)));

        // As an additional sanity check, all images in the metadata should have Mono.Cecil.MetadataToken == 1
        // In metadata v24.1, two extra fields were added which will cause the below test to fail.
        // In that case, we can then adjust the version number and reload
        // Tokens were introduced in v19 - we don't bother testing earlier versions
        if (Version >= 19 && Images.Any(x => x.token != 1))
            if (Version == 24.0) {
                Version = 24.1;

                // No need to re-read the header, it's the same for both sub-versions
                Images = ReadArray<Il2CppImageDefinition>(Header.imagesOffset, Header.imagesCount / Sizeof(typeof(Il2CppImageDefinition)));

                if (Images.Any(x => x.token != 1))
                    throw new InvalidOperationException("Could not verify the integrity of the metadata file image list");
            }

        Types = ReadArray<Il2CppTypeDefinition>(Header.typeDefinitionsOffset, Header.typeDefinitionsCount / Sizeof(typeof(Il2CppTypeDefinition)));
        Methods = ReadArray<Il2CppMethodDefinition>(Header.methodsOffset, Header.methodsCount / Sizeof(typeof(Il2CppMethodDefinition)));
        Params = ReadArray<Il2CppParameterDefinition>(Header.parametersOffset, Header.parametersCount / Sizeof(typeof(Il2CppParameterDefinition)));
        Fields = ReadArray<Il2CppFieldDefinition>(Header.fieldsOffset, Header.fieldsCount / Sizeof(typeof(Il2CppFieldDefinition)));
        FieldDefaultValues = ReadArray<Il2CppFieldDefaultValue>(Header.fieldDefaultValuesOffset, Header.fieldDefaultValuesCount / Sizeof(typeof(Il2CppFieldDefaultValue)));
        Properties = ReadArray<Il2CppPropertyDefinition>(Header.propertiesOffset, Header.propertiesCount / Sizeof(typeof(Il2CppPropertyDefinition)));
        Events = ReadArray<Il2CppEventDefinition>(Header.eventsOffset, Header.eventsCount / Sizeof(typeof(Il2CppEventDefinition)));
        InterfaceUsageIndices = ReadArray<int>(Header.interfacesOffset, Header.interfacesCount / sizeof(int));
        NestedTypeIndices = ReadArray<int>(Header.nestedTypesOffset, Header.nestedTypesCount / sizeof(int));
        GenericContainers = ReadArray<Il2CppGenericContainer>(Header.genericContainersOffset, Header.genericContainersCount / Sizeof(typeof(Il2CppGenericContainer)));
        GenericParameters = ReadArray<Il2CppGenericParameter>(Header.genericParametersOffset, Header.genericParametersCount / Sizeof(typeof(Il2CppGenericParameter)));
        GenericConstraintIndices = ReadArray<int>(Header.genericParameterConstraintsOffset, Header.genericParameterConstraintsCount / sizeof(int));
        InterfaceOffsets = ReadArray<Il2CppInterfaceOffsetPair>(Header.interfaceOffsetsOffset, Header.interfaceOffsetsCount / Sizeof(typeof(Il2CppInterfaceOffsetPair)));
        VTableMethodIndices = ReadArray<uint>(Header.vtableMethodsOffset, Header.vtableMethodsCount / sizeof(uint));

        if (Version >= 16) {
            // In v24.4 hashValueIndex was removed from Il2CppAssemblyNameDefinition, which is a field in Il2CppAssemblyDefinition
            // The number of images and assemblies should be the same. If they are not, we deduce that we are using v24.4
            // Note the version comparison matches both 24.2 and 24.3 here since 24.3 is tested for during binary loading
            var assemblyCount = Header.assembliesCount / Sizeof(typeof(Il2CppAssemblyDefinition));
            if (Version == 24.2 && assemblyCount < Images.Length)
                Version = 24.4;

            Assemblies = ReadArray<Il2CppAssemblyDefinition>(Header.assembliesOffset, Images.Length);
            ParameterDefaultValues = ReadArray<Il2CppParameterDefaultValue>(Header.parameterDefaultValuesOffset, Header.parameterDefaultValuesCount / Sizeof(typeof(Il2CppParameterDefaultValue)));
        }
        if (Version >= 19 && Version < 27) {
            MetadataUsageLists = ReadArray<Il2CppMetadataUsageList>(Header.metadataUsageListsOffset, Header.metadataUsageListsCount / Sizeof(typeof(Il2CppMetadataUsageList)));
            MetadataUsagePairs = ReadArray<Il2CppMetadataUsagePair>(Header.metadataUsagePairsOffset, Header.metadataUsagePairsCount / Sizeof(typeof(Il2CppMetadataUsagePair)));
        }
        if (Version >= 19) {
            FieldRefs = ReadArray<Il2CppFieldRef>(Header.fieldRefsOffset, Header.fieldRefsCount / Sizeof(typeof(Il2CppFieldRef)));
        }
        if (Version >= 21) {
            AttributeTypeIndices = ReadArray<int>(Header.attributeTypesOffset, Header.attributeTypesCount / sizeof(int));
            AttributeTypeRanges = ReadArray<Il2CppCustomAttributeTypeRange>(Header.attributesInfoOffset, Header.attributesInfoCount / Sizeof(typeof(Il2CppCustomAttributeTypeRange)));
        }

        // Get all metadata strings
        var pluginGetStringsResult = PluginHooks.GetStrings(this);
        if (pluginGetStringsResult.IsDataModified && !pluginGetStringsResult.IsInvalid)
            Strings = pluginGetStringsResult.Strings;

        else {
            Position = Header.stringOffset;

            while (Position < Header.stringOffset + Header.stringCount)
                Strings.Add((int) Position - Header.stringOffset, ReadNullTerminatedString());
        }

        // Get all string literals
        var pluginGetStringLiteralsResult = PluginHooks.GetStringLiterals(this);
        if (pluginGetStringLiteralsResult.IsDataModified)
            StringLiterals = pluginGetStringLiteralsResult.StringLiterals.ToArray();

        else {
            var stringLiteralList = ReadArray<Il2CppStringLiteral>(Header.stringLiteralOffset, Header.stringLiteralCount / Sizeof(typeof(Il2CppStringLiteral)));

            StringLiterals = new string[stringLiteralList.Length];
            for (var i = 0; i < stringLiteralList.Length; i++)
                StringLiterals[i] = ReadFixedLengthString(Header.stringLiteralDataOffset + stringLiteralList[i].dataIndex, stringLiteralList[i].length);
        }

        // Post-processing hook
        IsModified |= PluginHooks.PostProcessMetadata(this).IsStreamModified;
    }

    // Save metadata to file, overwriting if necessary
    public void SaveToFile(string pathname) {
        Position = 0;
        using (var outFile = new FileStream(pathname, FileMode.Create, FileAccess.Write))
            CopyTo(outFile);
    }

    public int Sizeof(Type type) => Sizeof(type, Version);
    
    public int Sizeof(Type type, double metadataVersion, int longSizeBytes = 8) {

        if (Reader.ObjectMappings.TryGetValue(type, out var streamType))
            type = streamType;

        int size = 0;
        foreach (var i in type.GetTypeInfo().GetFields())
        {
            // Only process fields for our selected object versioning (always process if none supplied)
            var versions = i.GetCustomAttributes<VersionAttribute>(false).Select(v => (v.Min, v.Max)).ToList();
            if (versions.Any() && !versions.Any(v => (v.Min <= metadataVersion || v.Min == -1) && (v.Max >= metadataVersion || v.Max == -1)))
                continue;

            if (i.FieldType == typeof(long) || i.FieldType == typeof(ulong))
                size += longSizeBytes;
            else if (i.FieldType == typeof(int) || i.FieldType == typeof(uint))
                size += 4;
            else if (i.FieldType == typeof(short) || i.FieldType == typeof(ushort))
                size += 2;

            // Fixed-length array
            else if (i.FieldType.IsArray) {
                var attr = i.GetCustomAttribute<ArrayLengthAttribute>(false) ??
                           throw new InvalidOperationException("Array field " + i.Name + " must have ArrayLength attribute");
                size += attr.FixedSize;
            }

            // Embedded object
            else
                size += Sizeof(i.FieldType, metadataVersion);
        }
        return size;
    }
}

}