46 lines
1.6 KiB
C#
46 lines
1.6 KiB
C#
/*
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Copyright (C) 2011-2015 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using dnlib.DotNet.Emit;
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using de4dot.blocks;
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namespace de4dot.code.deobfuscators.Goliath_NET {
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class LogicalExpressionFixer {
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public void Deobfuscate(Blocks blocks) {
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foreach (var block in blocks.MethodBlocks.GetAllBlocks()) {
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var instrs = block.Instructions;
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for (int i = 0; i < instrs.Count - 1; i++) {
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var first = instrs[i];
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var second = instrs[i + 1];
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if (first.OpCode.Code == Code.Not && second.OpCode.Code == Code.Neg) {
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// It's increment
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instrs[i] = new Instr(OpCodes.Ldc_I4_1.ToInstruction());
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instrs[i + 1] = new Instr(OpCodes.Add.ToInstruction());
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}
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else if (first.OpCode.Code == Code.Neg && second.OpCode.Code == Code.Not) {
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// It's decrement
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instrs[i] = new Instr(OpCodes.Ldc_I4_1.ToInstruction());
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instrs[i + 1] = new Instr(OpCodes.Sub.ToInstruction());
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}
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}
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}
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}
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}
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}
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