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RvaData支持加密

backup
walon 2025-04-23 18:43:14 +08:00
parent 0ad6422b7b
commit 6bc9192c13
3 changed files with 27 additions and 6 deletions
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13
Editor/Emit/RvaDataAllocator.cs
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@ -39,6 +39,7 @@ namespace Obfuz.Emit
public FieldDef runtimeValueField; public FieldDef runtimeValueField;
public uint size; public uint size;
public List<byte> bytes; public List<byte> bytes;
public int minorSecret;
public void FillPadding() public void FillPadding()
{ {
@ -118,6 +119,7 @@ namespace Obfuz.Emit
runtimeValueField = runtimeValueField, runtimeValueField = runtimeValueField,
size = dataHolderType.ClassSize, size = dataHolderType.ClassSize,
bytes = new List<byte>((int)dataHolderType.ClassSize), bytes = new List<byte>((int)dataHolderType.ClassSize),
minorSecret = _random.NextInt(),
}; };
_rvaFields.Add(newRvaField); _rvaFields.Add(newRvaField);
return newRvaField; return newRvaField;
@ -222,9 +224,10 @@ namespace Obfuz.Emit
cctor.Body = body; cctor.Body = body;
var ins = body.Instructions; var ins = body.Instructions;
IMethod method = mod.Import(typeof(System.Runtime.CompilerServices.RuntimeHelpers).GetMethod("InitializeArray", new[] { typeof(Array), typeof(RuntimeFieldHandle) })); IMethod initializeArrayMethod = mod.Import(typeof(System.Runtime.CompilerServices.RuntimeHelpers).GetMethod("InitializeArray", new[] { typeof(Array), typeof(RuntimeFieldHandle) }));
IMethod decryptArrayMethod = mod.Import(typeof(EncryptionService).GetMethod("DecryptBytes", new[] { typeof(byte[]), typeof(int) }));
Assert.IsNotNull(method); Assert.IsNotNull(initializeArrayMethod);
foreach (var field in _rvaFields) foreach (var field in _rvaFields)
{ {
// ldc // ldc
@ -236,11 +239,13 @@ namespace Obfuz.Emit
ins.Add(Instruction.Create(OpCodes.Ldc_I4, (int)field.size)); ins.Add(Instruction.Create(OpCodes.Ldc_I4, (int)field.size));
ins.Add(Instruction.Create(OpCodes.Newarr, field.runtimeValueField.FieldType.Next.ToTypeDefOrRef())); ins.Add(Instruction.Create(OpCodes.Newarr, field.runtimeValueField.FieldType.Next.ToTypeDefOrRef()));
ins.Add(Instruction.Create(OpCodes.Dup)); ins.Add(Instruction.Create(OpCodes.Dup));
ins.Add(Instruction.Create(OpCodes.Dup));
ins.Add(Instruction.Create(OpCodes.Stsfld, field.runtimeValueField)); ins.Add(Instruction.Create(OpCodes.Stsfld, field.runtimeValueField));
ins.Add(Instruction.Create(OpCodes.Ldtoken, field.holderDataField)); ins.Add(Instruction.Create(OpCodes.Ldtoken, field.holderDataField));
ins.Add(Instruction.Create(OpCodes.Call, method)); ins.Add(Instruction.Create(OpCodes.Call, initializeArrayMethod));
ins.Add(Instruction.Create(OpCodes.Ldc_I4, field.minorSecret));
ins.Add(Instruction.Create(OpCodes.Call, decryptArrayMethod));
// TODO Decrpyt
} }
ins.Add(Instruction.Create(OpCodes.Ret)); ins.Add(Instruction.Create(OpCodes.Ret));
} }

2
Editor/Virtualization/DataNodes/ConstFromFieldRvaDataNode.cs
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@ -44,7 +44,7 @@ namespace Obfuz.Virtualization
private static IMethod s_convertDouble; private static IMethod s_convertDouble;
private static IMethod s_convertString; private static IMethod s_convertString;
private static IField s_Encoding_Utf8; //private static IField s_Encoding_Utf8;
private static IMethod s_convertBytes; private static IMethod s_convertBytes;
private void InitImportMetadatas(ModuleDef mod) private void InitImportMetadatas(ModuleDef mod)

16
Runtime/EncryptionService.cs Normal file
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@ -0,0 +1,16 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Obfuz
{
public static class EncryptionService
{
public static void DecryptBytes(byte[] data, int minorSecret)
{
}
}
}