- It's not static anymore - It implements ILogger - It can ignore errors/warnings but an option to disable it
86 lines
2.8 KiB
C#
86 lines
2.8 KiB
C#
/*
|
|
Copyright (C) 2011-2012 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;
|
|
using System.Collections.Generic;
|
|
using dot10.DotNet;
|
|
using dot10.DotNet.Emit;
|
|
using de4dot.blocks;
|
|
|
|
namespace de4dot.code.deobfuscators.Agile_NET {
|
|
class ProxyCallFixer : ProxyCallFixer1 {
|
|
public ProxyCallFixer(ModuleDefMD module)
|
|
: base(module) {
|
|
}
|
|
|
|
public ProxyCallFixer(ModuleDefMD module, ProxyCallFixer oldOne)
|
|
: base(module) {
|
|
foreach (var method in oldOne.delegateCreatorMethods)
|
|
setDelegateCreatorMethod(lookup(method, "Could not find delegate creator method"));
|
|
}
|
|
|
|
public void findDelegateCreator() {
|
|
foreach (var type in module.Types) {
|
|
var methodName = "System.Void " + type.FullName + "::icgd(System.Int32)";
|
|
foreach (var method in type.Methods) {
|
|
if (method.FullName == methodName) {
|
|
setDelegateCreatorMethod(method);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
protected override object checkCctor(ref TypeDef type, MethodDef cctor) {
|
|
var instrs = cctor.Body.Instructions;
|
|
if (instrs.Count != 3)
|
|
return null;
|
|
if (!instrs[0].IsLdcI4())
|
|
return null;
|
|
if (instrs[1].OpCode != OpCodes.Call || !isDelegateCreatorMethod(instrs[1].Operand as MethodDef))
|
|
return null;
|
|
if (instrs[2].OpCode != OpCodes.Ret)
|
|
return null;
|
|
|
|
int delegateToken = 0x02000001 + instrs[0].GetLdcI4Value();
|
|
if (type.MDToken.ToInt32() != delegateToken) {
|
|
Logger.w("Delegate token is not current type");
|
|
return null;
|
|
}
|
|
|
|
return new object();
|
|
}
|
|
|
|
protected override void getCallInfo(object context, FieldDef field, out IMethod calledMethod, out OpCode callOpcode) {
|
|
var name = field.Name.String;
|
|
callOpcode = OpCodes.Call;
|
|
if (name.EndsWith("%", StringComparison.Ordinal)) {
|
|
callOpcode = OpCodes.Callvirt;
|
|
name = name.TrimEnd(new char[] { '%' });
|
|
}
|
|
byte[] value = Convert.FromBase64String(name);
|
|
int methodIndex = BitConverter.ToInt32(value, 0); // 0-based memberRef index
|
|
var mr = module.ResolveMemberRef((uint)methodIndex + 1);
|
|
if (mr == null || !mr.IsMethodRef)
|
|
throw new ApplicationException(string.Format("Invalid MemberRef index: {0}", methodIndex));
|
|
calledMethod = mr;
|
|
}
|
|
}
|
|
}
|