initial commit

Obfuscator.Obfuscator.IntProtect/Int.cs

@@ -0,0 +1,52 @@
+using System;
+using dnlib.DotNet;
+using dnlib.DotNet.Emit;
+
+namespace Obfuscator.Obfuscator.IntProtect;
+
+internal class Int
+{
+	public static void Execute(ModuleDef moduleDef)
+	{
+		foreach (TypeDef type in moduleDef.GetTypes())
+		{
+			if (type.IsGlobalModuleType)
+			{
+				continue;
+			}
+			foreach (MethodDef method in type.Methods)
+			{
+				if (!method.HasBody)
+				{
+					continue;
+				}
+				for (int i = 0; i < method.Body.Instructions.Count; i++)
+				{
+					if (method.Body.Instructions[i].IsLdcI4())
+					{
+						int num = new Random(Guid.NewGuid().GetHashCode()).Next();
+						int num2 = new Random(Guid.NewGuid().GetHashCode()).Next();
+						int value = num ^ num2;
+						Instruction instruction = OpCodes.Nop.ToInstruction();
+						Local local = new Local(method.Module.ImportAsTypeSig(typeof(int)));
+						method.Body.Variables.Add(local);
+						method.Body.Instructions.Insert(i + 1, OpCodes.Stloc.ToInstruction(local));
+						method.Body.Instructions.Insert(i + 2, Instruction.Create(OpCodes.Ldc_I4, method.Body.Instructions[i].GetLdcI4Value() - 4));
+						method.Body.Instructions.Insert(i + 3, Instruction.Create(OpCodes.Ldc_I4, num));
+						method.Body.Instructions.Insert(i + 4, Instruction.Create(OpCodes.Ldc_I4, value));
+						method.Body.Instructions.Insert(i + 5, Instruction.Create(OpCodes.Xor));
+						method.Body.Instructions.Insert(i + 6, Instruction.Create(OpCodes.Ldc_I4, num2));
+						method.Body.Instructions.Insert(i + 7, Instruction.Create(OpCodes.Bne_Un, instruction));
+						method.Body.Instructions.Insert(i + 8, Instruction.Create(OpCodes.Ldc_I4, 2));
+						method.Body.Instructions.Insert(i + 9, OpCodes.Stloc.ToInstruction(local));
+						method.Body.Instructions.Insert(i + 10, Instruction.Create(OpCodes.Sizeof, method.Module.Import(typeof(float))));
+						method.Body.Instructions.Insert(i + 11, Instruction.Create(OpCodes.Add));
+						method.Body.Instructions.Insert(i + 12, instruction);
+						i += 12;
+					}
+				}
+				method.Body.SimplifyBranches();
+			}
+		}
+	}
+}