46 lines
1.6 KiB
C#
46 lines
1.6 KiB
C#
/*
|
|
Copyright (C) 2011-2013 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 dnlib.DotNet.Emit;
|
|
using de4dot.blocks;
|
|
|
|
namespace de4dot.code.deobfuscators.Goliath_NET {
|
|
class LogicalExpressionFixer {
|
|
public void deobfuscate(Blocks blocks) {
|
|
foreach (var block in blocks.MethodBlocks.getAllBlocks()) {
|
|
var instrs = block.Instructions;
|
|
for (int i = 0; i < instrs.Count - 1; i++) {
|
|
var first = instrs[i];
|
|
var second = instrs[i + 1];
|
|
if (first.OpCode.Code == Code.Not && second.OpCode.Code == Code.Neg) {
|
|
// It's increment
|
|
instrs[i] = new Instr(OpCodes.Ldc_I4_1.ToInstruction());
|
|
instrs[i + 1] = new Instr(OpCodes.Add.ToInstruction());
|
|
}
|
|
else if (first.OpCode.Code == Code.Neg && second.OpCode.Code == Code.Not) {
|
|
// It's decrement
|
|
instrs[i] = new Instr(OpCodes.Ldc_I4_1.ToInstruction());
|
|
instrs[i + 1] = new Instr(OpCodes.Sub.ToInstruction());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|