137 lines
3.6 KiB
C#
137 lines
3.6 KiB
C#
/*
|
|
Copyright (C) 2011-2014 de4dot@gmail.com
|
|
|
|
This file is part of de4dot.
|
|
|
|
de4dot is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
de4dot is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with de4dot. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
using System.Collections.Generic;
|
|
using dnlib.DotNet;
|
|
using dnlib.DotNet.Emit;
|
|
using de4dot.blocks;
|
|
|
|
namespace de4dot.code.deobfuscators.ILProtector {
|
|
class MainType {
|
|
ModuleDefMD module;
|
|
List<RuntimeFileInfo> runtimeFileInfos;
|
|
TypeDef invokerDelegate;
|
|
FieldDef invokerInstanceField;
|
|
|
|
public List<RuntimeFileInfo> RuntimeFileInfos {
|
|
get { return runtimeFileInfos; }
|
|
}
|
|
|
|
public TypeDef InvokerDelegate {
|
|
get { return invokerDelegate; }
|
|
}
|
|
|
|
public FieldDef InvokerInstanceField {
|
|
get { return invokerInstanceField; }
|
|
}
|
|
|
|
public bool Detected {
|
|
get { return runtimeFileInfos != null; }
|
|
}
|
|
|
|
public MainType(ModuleDefMD module) {
|
|
this.module = module;
|
|
}
|
|
|
|
public void Find() {
|
|
CheckMethod(DotNetUtils.GetModuleTypeCctor(module));
|
|
}
|
|
|
|
static string[] ilpLocalsV1x = new string[] {
|
|
"System.Boolean",
|
|
"System.IntPtr",
|
|
"System.Object[]",
|
|
};
|
|
static string[] ilpLocalsV2x = new string[] {
|
|
"System.IntPtr",
|
|
};
|
|
bool CheckMethod(MethodDef cctor) {
|
|
if (cctor == null || cctor.Body == null)
|
|
return false;
|
|
var localTypes = new LocalTypes(cctor);
|
|
if (!localTypes.Exactly(ilpLocalsV1x) &&
|
|
!localTypes.Exactly(ilpLocalsV2x))
|
|
return false;
|
|
|
|
var type = cctor.DeclaringType;
|
|
var methods = GetPinvokeMethods(type, "Protect");
|
|
if (methods.Count == 0)
|
|
methods = GetPinvokeMethods(type, "P0");
|
|
if (methods.Count != 2)
|
|
return false;
|
|
if (type.Fields.Count < 1 || type.Fields.Count > 2)
|
|
return false;
|
|
|
|
if (!GetDelegate(type, out invokerInstanceField, out invokerDelegate))
|
|
return false;
|
|
|
|
runtimeFileInfos = new List<RuntimeFileInfo>(methods.Count);
|
|
foreach (var method in methods)
|
|
runtimeFileInfos.Add(new RuntimeFileInfo(method));
|
|
return true;
|
|
}
|
|
|
|
bool GetDelegate(TypeDef type, out FieldDef field, out TypeDef del) {
|
|
foreach (var fld in type.Fields) {
|
|
var theDelegate = fld.FieldType.TryGetTypeDef();
|
|
if (theDelegate != null && DotNetUtils.DerivesFromDelegate(theDelegate)) {
|
|
field = fld;
|
|
del = theDelegate;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
field = null;
|
|
del = null;
|
|
return false;
|
|
}
|
|
|
|
static List<MethodDef> GetPinvokeMethods(TypeDef type, string name) {
|
|
var list = new List<MethodDef>();
|
|
foreach (var method in type.Methods) {
|
|
if (method.ImplMap != null && method.ImplMap.Name == name)
|
|
list.Add(method);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
public string GetRuntimeVersionString() {
|
|
if (runtimeFileInfos == null)
|
|
return null;
|
|
foreach (var info in runtimeFileInfos) {
|
|
var version = info.GetVersion();
|
|
if (version != null)
|
|
return version.ToString();
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public void CleanUp() {
|
|
var cctor = DotNetUtils.GetModuleTypeCctor(module);
|
|
if (cctor != null) {
|
|
cctor.Body.InitLocals = false;
|
|
cctor.Body.Variables.Clear();
|
|
cctor.Body.Instructions.Clear();
|
|
cctor.Body.Instructions.Add(OpCodes.Ret.ToInstruction());
|
|
cctor.Body.ExceptionHandlers.Clear();
|
|
}
|
|
}
|
|
}
|
|
}
|