initial commit

2026-08-27 11:21:58 -06:00
commit c21fb61050
336 changed files with 74161 additions and 0 deletions
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+using dnlib.DotNet;
+using dnlib.DotNet.Emit;
+
+namespace Obfuscator.Obfuscator.Mutation2;
+
+public class MulToShift : iMutation
+{
+	public void Prepare(TypeDef type)
+	{
+	}
+
+	public void Process(MethodDef method, ref int index)
+	{
+		if (!method.Body.Instructions[index - 1].IsLdcI4() || !method.Body.Instructions[index - 2].IsLdcI4())
+		{
+			return;
+		}
+		int ldcI4Value = method.Body.Instructions[index - 2].GetLdcI4Value();
+		int ldcI4Value2 = method.Body.Instructions[index - 1].GetLdcI4Value();
+		if (ldcI4Value2 < 3)
+		{
+			return;
+		}
+		Local local = new Local(method.Module.CorLibTypes.Int32);
+		method.Body.Variables.Add(local);
+		method.Body.Instructions.Insert(0, new Instruction(OpCodes.Stloc, local));
+		method.Body.Instructions.Insert(0, new Instruction(OpCodes.Ldc_I4, ldcI4Value));
+		index += 2;
+		method.Body.Instructions[index - 2].OpCode = OpCodes.Ldloc;
+		method.Body.Instructions[index - 2].Operand = local;
+		method.Body.Instructions[index - 1].OpCode = OpCodes.Nop;
+		method.Body.Instructions[index].OpCode = OpCodes.Nop;
+		int num = 0;
+		for (int num2 = ldcI4Value2; num2 > 0; num2 >>= 1)
+		{
+			if ((num2 & 1) == 1 && num != 0)
+			{
+				method.Body.Instructions.Insert(++index, new Instruction(OpCodes.Ldloc, local));
+				method.Body.Instructions.Insert(++index, new Instruction(OpCodes.Ldc_I4, num));
+				method.Body.Instructions.Insert(++index, new Instruction(OpCodes.Shl));
+				method.Body.Instructions.Insert(++index, new Instruction(OpCodes.Add));
+			}
+			num++;
+		}
+		if ((ldcI4Value2 & 1) == 0)
+		{
+			method.Body.Instructions.Insert(++index, new Instruction(OpCodes.Ldloc, local));
+			method.Body.Instructions.Insert(++index, new Instruction(OpCodes.Sub));
+		}
+	}
+
+	public bool Supported(Instruction instr)
+	{
+		return instr.OpCode == OpCodes.Mul;
+	}
+}