0xcjy
55 lines
2.8 KiB
C#
55 lines
2.8 KiB
C#
// Read-only IL2CPP method pointer lookup against a hash-verified recovered target.
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// Accepts RVAs on the command line; outputs exact metadata matches, not guesses.
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using System.Reflection;
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using System.Security.Cryptography;
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using AssetRipper.Primitives;
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using LibCpp2IL;
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using LibCpp2IL.Metadata;
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const string root = @"D:\Projects\UmaTools\UmaViewer-master5\tmp";
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var binaryPath = Path.Combine(root, "target-gameassembly-unpacked.dll");
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var metadataPath = Path.Combine(root, "global-metadata.runtime.dat");
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const string expectedHash = "E273B4F499E4449BBABC361C03C91F260178BF3E687825AA3ABE6E686664569B";
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const string expectedMetadataHash = "88A465567FBB7189F00689D0DEC6C741F2BAD0915E123D6CE1415E3261F49D0D";
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if (!SHA256.HashData(File.ReadAllBytes(binaryPath)).AsSpan().SequenceEqual(Convert.FromHexString(expectedHash)))
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throw new InvalidDataException("Recovered target binary hash mismatch");
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if (!SHA256.HashData(File.ReadAllBytes(metadataPath)).AsSpan().SequenceEqual(Convert.FromHexString(expectedMetadataHash)))
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throw new InvalidDataException("Recovered target metadata hash mismatch");
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var wanted = args.Select(a => Convert.ToUInt64(a.StartsWith("0x", StringComparison.OrdinalIgnoreCase) ? a[2..] : a, 16))
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.ToHashSet();
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if (wanted.Count == 0)
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throw new ArgumentException("Pass one or more hexadecimal RVAs");
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// LibCpp2IL emits several pages of initialization messages; keep the report bounded.
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var stdout = Console.Out;
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LibCpp2IlContext context;
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try
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{
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Console.SetOut(TextWriter.Null);
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context = LibCpp2IlMain.LoadFromFileAsContext(binaryPath, metadataPath, UnityVersion.Parse("2022.3.62f3"));
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}
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finally { Console.SetOut(stdout); }
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var metadata = context.Metadata;
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var found = new Dictionary<ulong, List<string>>();
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for (int i = 0; i < metadata.TypeDefinitionCount; i++)
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{
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var index = (Il2CppVariableWidthIndex<Il2CppTypeDefinition>)Activator.CreateInstance(
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typeof(Il2CppVariableWidthIndex<Il2CppTypeDefinition>),
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BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
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binder: null, args: new object[] { i }, culture: null)!;
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var type = metadata.GetTypeDefinitionFromIndex(index);
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foreach (var method in type.Methods ?? Array.Empty<Il2CppMethodDefinition>())
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{
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ulong rva;
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try { rva = method.Rva; }
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catch { continue; }
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if (!wanted.Contains(rva)) continue;
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var name = $"{type.Namespace}.{type.Name}.{method.Name}";
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if (!found.TryGetValue(rva, out var names)) found[rva] = names = new List<string>();
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names.Add(name);
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}
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}
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Console.WriteLine($"verified target SHA256={expectedHash}; metadataVersion={context.Binary.MetadataVersion}");
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foreach (ulong rva in wanted.OrderBy(x => x))
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Console.WriteLine($"0x{rva:x}: {(found.TryGetValue(rva, out var names) ? string.Join("; ", names) : "<no metadata method pointer>")}");
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