2012-01-11 11:38:02 +08:00
|
|
|
|
/*
|
2015-10-30 05:45:26 +08:00
|
|
|
|
Copyright (C) 2011-2015 de4dot@gmail.com
|
2012-01-11 11:38:02 +08:00
|
|
|
|
|
|
|
|
|
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/>.
|
|
|
|
|
*/
|
|
|
|
|
|
2012-04-30 04:22:43 +08:00
|
|
|
|
using System;
|
|
|
|
|
using System.Collections.Generic;
|
|
|
|
|
|
2012-01-11 11:38:02 +08:00
|
|
|
|
namespace de4dot.blocks.cflow {
|
2012-04-30 04:22:43 +08:00
|
|
|
|
public abstract class BlockDeobfuscator : IBlocksDeobfuscator {
|
|
|
|
|
protected List<Block> allBlocks;
|
|
|
|
|
protected Blocks blocks;
|
|
|
|
|
|
2013-04-30 18:15:07 +08:00
|
|
|
|
public bool ExecuteIfNotModified { get; set; }
|
2012-05-03 11:34:12 +08:00
|
|
|
|
|
2013-01-19 20:03:57 +08:00
|
|
|
|
public virtual void DeobfuscateBegin(Blocks blocks) {
|
2012-04-30 04:22:43 +08:00
|
|
|
|
this.blocks = blocks;
|
|
|
|
|
}
|
|
|
|
|
|
2013-01-19 20:03:57 +08:00
|
|
|
|
public bool Deobfuscate(List<Block> allBlocks) {
|
|
|
|
|
Initialize(allBlocks);
|
2012-04-30 04:22:43 +08:00
|
|
|
|
|
2013-04-30 18:15:07 +08:00
|
|
|
|
bool modified = false;
|
2012-04-30 04:22:43 +08:00
|
|
|
|
foreach (var block in allBlocks) {
|
|
|
|
|
try {
|
2013-04-30 18:15:07 +08:00
|
|
|
|
modified |= Deobfuscate(block);
|
2012-04-30 04:22:43 +08:00
|
|
|
|
}
|
|
|
|
|
catch (NullReferenceException) {
|
|
|
|
|
// Here if eg. invalid metadata token in a call instruction (operand is null)
|
|
|
|
|
}
|
|
|
|
|
}
|
2013-04-30 18:15:07 +08:00
|
|
|
|
return modified;
|
2012-01-11 11:38:02 +08:00
|
|
|
|
}
|
|
|
|
|
|
2013-01-19 20:03:57 +08:00
|
|
|
|
protected virtual void Initialize(List<Block> allBlocks) {
|
2012-04-30 04:22:43 +08:00
|
|
|
|
this.allBlocks = allBlocks;
|
2012-01-11 11:38:02 +08:00
|
|
|
|
}
|
2012-04-30 04:22:43 +08:00
|
|
|
|
|
2013-01-19 20:03:57 +08:00
|
|
|
|
protected abstract bool Deobfuscate(Block block);
|
2012-01-11 11:38:02 +08:00
|
|
|
|
}
|
|
|
|
|
}
|