/*
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 .
*/
using System.Collections.Generic;
using dot10.DotNet;
using de4dot.blocks;
namespace de4dot.code.deobfuscators.Rummage {
public class DeobfuscatorInfo : DeobfuscatorInfoBase {
public const string THE_NAME = "Rummage";
public const string THE_TYPE = "rm";
const string DEFAULT_REGEX = @"!.";
public DeobfuscatorInfo()
: base(DEFAULT_REGEX) {
}
public override string Name {
get { return THE_NAME; }
}
public override string Type {
get { return THE_TYPE; }
}
public override IDeobfuscator createDeobfuscator() {
return new Deobfuscator(new Deobfuscator.Options {
ValidNameRegex = validNameRegex.get(),
});
}
}
class Deobfuscator : DeobfuscatorBase {
string obfuscatorName = DeobfuscatorInfo.THE_NAME;
StringDecrypter stringDecrypter;
internal class Options : OptionsBase {
}
public override string Type {
get { return DeobfuscatorInfo.THE_TYPE; }
}
public override string TypeLong {
get { return DeobfuscatorInfo.THE_NAME; }
}
public override string Name {
get { return obfuscatorName; }
}
public Deobfuscator(Options options)
: base(options) {
}
protected override int detectInternal() {
int val = 0;
int sum = toInt32(stringDecrypter.Detected);
if (sum > 0)
val += 100 + 10 * (sum - 1);
return val;
}
protected override void scanForObfuscator() {
stringDecrypter = new StringDecrypter(module);
stringDecrypter.find();
detectVersion();
}
void detectVersion() {
string version;
switch (stringDecrypter.Version) {
case RummageVersion.V1_1_445: version = "v1.1 - v2.0"; break;
case RummageVersion.V2_1_729: version = "v2.1 - v2.2"; break;
default: version = null; break;
}
if (version != null)
obfuscatorName += " " + version;
}
public override void deobfuscateBegin() {
base.deobfuscateBegin();
stringDecrypter.initialize();
}
public override void deobfuscateMethodEnd(Blocks blocks) {
if (CanRemoveStringDecrypterType)
stringDecrypter.deobfuscate(blocks);
base.deobfuscateMethodEnd(blocks);
}
public override void deobfuscateEnd() {
if (CanRemoveStringDecrypterType) {
addTypeToBeRemoved(stringDecrypter.Type, "String decrypter type");
addTypesToBeRemoved(stringDecrypter.OtherTypes, "Decrypted string type");
}
base.deobfuscateEnd();
}
public override IEnumerable getStringDecrypterMethods() {
return new List();
}
}
}