/*
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.Skater_NET {
public class DeobfuscatorInfo : DeobfuscatorInfoBase {
public const string THE_NAME = "Skater .NET";
public const string THE_TYPE = "sk";
const string DEFAULT_REGEX = @"!`[^0-9]+&" + DeobfuscatorBase.DEFAULT_VALID_NAME_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 {
Options options;
StringDecrypter stringDecrypter;
EnumClassFinder enumClassFinder;
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 DeobfuscatorInfo.THE_NAME; }
}
public Deobfuscator(Options options)
: base(options) {
this.options = options;
StringFeatures = StringFeatures.AllowNoDecryption | StringFeatures.AllowStaticDecryption;
}
protected override int detectInternal() {
int val = 0;
if (stringDecrypter.Detected)
val += 100;
return val;
}
protected override void scanForObfuscator() {
stringDecrypter = new StringDecrypter(module);
if (hasAssemblyReference("Microsoft.VisualBasic"))
stringDecrypter.find();
}
bool hasAssemblyReference(string name) {
foreach (var asmRef in module.AssemblyReferences) {
if (asmRef.Name == name)
return true;
}
return false;
}
public override void deobfuscateBegin() {
base.deobfuscateBegin();
enumClassFinder = new EnumClassFinder(module);
stringDecrypter.initialize(DeobfuscatedFile);
}
public override void deobfuscateMethodEnd(Blocks blocks) {
if (CanRemoveStringDecrypterType)
stringDecrypter.deobfuscate(blocks);
enumClassFinder.deobfuscate(blocks);
base.deobfuscateMethodEnd(blocks);
}
public override void deobfuscateEnd() {
if (Operations.DecryptStrings != OpDecryptString.None && stringDecrypter.CanRemoveType)
addTypeToBeRemoved(stringDecrypter.Type, "String decrypter type");
fixEnumTypes();
base.deobfuscateEnd();
}
public override IEnumerable getStringDecrypterMethods() {
var list = new List();
return list;
}
}
}