75 lines
2.4 KiB
C#
75 lines
2.4 KiB
C#
/*
|
|
Copyright (C) 2011-2015 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;
|
|
|
|
namespace de4dot.blocks.cflow {
|
|
// Only deobfuscates a method once. A copy of the method (now deobfuscated) is returned.
|
|
public class CachedCflowDeobfuscator {
|
|
BlocksCflowDeobfuscator cflowDeobfuscator = new BlocksCflowDeobfuscator();
|
|
Dictionary<MethodDef, MethodDef> deobfuscated = new Dictionary<MethodDef, MethodDef>();
|
|
|
|
public CachedCflowDeobfuscator() {
|
|
}
|
|
|
|
public CachedCflowDeobfuscator(IEnumerable<IBlocksDeobfuscator> blocksDeobfuscators) {
|
|
Add(blocksDeobfuscators);
|
|
}
|
|
|
|
public void Add(IEnumerable<IBlocksDeobfuscator> blocksDeobfuscators) {
|
|
foreach (var bd in blocksDeobfuscators)
|
|
cflowDeobfuscator.Add(bd);
|
|
}
|
|
|
|
public void Add(IBlocksDeobfuscator blocksDeobfuscator) {
|
|
cflowDeobfuscator.Add(blocksDeobfuscator);
|
|
}
|
|
|
|
public MethodDef Deobfuscate(MethodDef method) {
|
|
MethodDef deobfuscatedMethod;
|
|
if (deobfuscated.TryGetValue(method, out deobfuscatedMethod))
|
|
return deobfuscatedMethod;
|
|
|
|
if (method.Body == null || method.Body.Instructions.Count == 0) {
|
|
deobfuscated[method] = method;
|
|
return method;
|
|
}
|
|
|
|
deobfuscatedMethod = DotNetUtils.Clone(method);
|
|
deobfuscated[method] = deobfuscatedMethod;
|
|
|
|
var blocks = new Blocks(deobfuscatedMethod);
|
|
Deobfuscate(blocks);
|
|
IList<Instruction> allInstructions;
|
|
IList<ExceptionHandler> allExceptionHandlers;
|
|
blocks.GetCode(out allInstructions, out allExceptionHandlers);
|
|
DotNetUtils.RestoreBody(deobfuscatedMethod, allInstructions, allExceptionHandlers);
|
|
|
|
return deobfuscatedMethod;
|
|
}
|
|
|
|
void Deobfuscate(Blocks blocks) {
|
|
cflowDeobfuscator.Initialize(blocks);
|
|
cflowDeobfuscator.Deobfuscate();
|
|
}
|
|
}
|
|
}
|