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Move bool inliner and create some more useful value inliners

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This commit is contained in:
de4dot 2012-01-03 10:38:09 +01:00
parent e79ee9832d
commit 6e80b5bb94
4 changed files with 130 additions and 76 deletions
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2
de4dot.code/de4dot.code.csproj
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@ -87,7 +87,6 @@
<Compile Include="deobfuscators\dotNET_Reactor\v3\NativeLibSaver.cs" />
<Compile Include="deobfuscators\dotNET_Reactor\v4\AssemblyResolver.cs" />
<Compile Include="deobfuscators\dotNET_Reactor\v4\BooleanDecrypter.cs" />
<Compile Include="deobfuscators\dotNET_Reactor\v4\BoolValueInliner.cs" />
<Compile Include="deobfuscators\dotNET_Reactor\v4\Deobfuscator.cs" />
<Compile Include="deobfuscators\dotNET_Reactor\v4\EmptyClass.cs" />
<Compile Include="deobfuscators\dotNET_Reactor\v4\EncryptedResource.cs" />
@ -135,6 +134,7 @@
<Compile Include="deobfuscators\Unknown\Deobfuscator.cs" />
<Compile Include="deobfuscators\UnpackedFile.cs" />
<Compile Include="deobfuscators\UnusedMethodsFinder.cs" />
<Compile Include="deobfuscators\ValueInlinerBase.cs" />
<Compile Include="deobfuscators\Xenocode\Deobfuscator.cs" />
<Compile Include="deobfuscators\Xenocode\StringDecrypter.cs" />
<Compile Include="IObfuscatedFile.cs" />

124
de4dot.code/deobfuscators/ValueInlinerBase.cs Normal file
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@ -0,0 +1,124 @@
/*
Copyright (C) 2011 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 System.Collections.Generic;
using Mono.Cecil;
using Mono.Cecil.Cil;
using de4dot.blocks;
namespace de4dot.code.deobfuscators {
abstract class ValueInlinerBase<TValue> : MethodReturnValueInliner {
MethodDefinitionAndDeclaringTypeDict<Func<MethodDefinition, object[], TValue>> decrypterMethods = new MethodDefinitionAndDeclaringTypeDict<Func<MethodDefinition, object[], TValue>>();
class MyCallResult : CallResult {
public MethodReference methodReference;
public MyCallResult(Block block, int callEndIndex, MethodReference method)
: base(block, callEndIndex) {
this.methodReference = method;
}
}
public bool HasHandlers {
get { return decrypterMethods.Count != 0; }
}
public IEnumerable<MethodDefinition> Methods {
get { return decrypterMethods.getKeys(); }
}
public void add(MethodDefinition method, Func<MethodDefinition, object[], TValue> handler) {
if (method != null)
decrypterMethods.add(method, handler);
}
protected override void inlineAllCalls() {
foreach (var tmp in callResults) {
var callResult = (MyCallResult)tmp;
var handler = decrypterMethods.find(callResult.methodReference);
callResult.returnValue = handler((MethodDefinition)callResult.methodReference, callResult.args);
}
}
protected override CallResult createCallResult(MethodReference method, Block block, int callInstrIndex) {
if (decrypterMethods.find(method) == null)
return null;
return new MyCallResult(block, callInstrIndex, method);
}
}
class BooleanValueInliner : ValueInlinerBase<bool> {
protected override void inlineReturnValues(IList<CallResult> callResults) {
foreach (var callResult in callResults) {
var block = callResult.block;
int num = callResult.callEndIndex - callResult.callStartIndex + 1;
block.replace(callResult.callStartIndex, num, DotNetUtils.createLdci4((bool)callResult.returnValue ? 1 : 0));
Log.v("Decrypted boolean: {0}", callResult.returnValue);
}
}
}
class Int32ValueInliner : ValueInlinerBase<int> {
protected override void inlineReturnValues(IList<CallResult> callResults) {
foreach (var callResult in callResults) {
var block = callResult.block;
int num = callResult.callEndIndex - callResult.callStartIndex + 1;
block.replace(callResult.callStartIndex, num, DotNetUtils.createLdci4((int)callResult.returnValue));
Log.v("Decrypted int32: {0}", callResult.returnValue);
}
}
}
class Int64ValueInliner : ValueInlinerBase<long> {
protected override void inlineReturnValues(IList<CallResult> callResults) {
foreach (var callResult in callResults) {
var block = callResult.block;
int num = callResult.callEndIndex - callResult.callStartIndex + 1;
block.replace(callResult.callStartIndex, num, Instruction.Create(OpCodes.Ldc_I8, (long)callResult.returnValue));
Log.v("Decrypted int64: {0}", callResult.returnValue);
}
}
}
class SingleValueInliner : ValueInlinerBase<float> {
protected override void inlineReturnValues(IList<CallResult> callResults) {
foreach (var callResult in callResults) {
var block = callResult.block;
int num = callResult.callEndIndex - callResult.callStartIndex + 1;
block.replace(callResult.callStartIndex, num, Instruction.Create(OpCodes.Ldc_R4, (float)callResult.returnValue));
Log.v("Decrypted single: {0}", callResult.returnValue);
}
}
}
class DoubleValueInliner : ValueInlinerBase<double> {
protected override void inlineReturnValues(IList<CallResult> callResults) {
foreach (var callResult in callResults) {
var block = callResult.block;
int num = callResult.callEndIndex - callResult.callStartIndex + 1;
block.replace(callResult.callStartIndex, num, Instruction.Create(OpCodes.Ldc_R8, (double)callResult.returnValue));
Log.v("Decrypted double: {0}", callResult.returnValue);
}
}
}
}

70
de4dot.code/deobfuscators/dotNET_Reactor/v4/BoolValueInliner.cs
View File

@ -1,70 +0,0 @@
/*
Copyright (C) 2011 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 System.Collections.Generic;
using Mono.Cecil;
using Mono.Cecil.Cil;
using de4dot.blocks;
namespace de4dot.code.deobfuscators.dotNET_Reactor.v4 {
class BoolValueInliner : MethodReturnValueInliner {
MethodDefinitionAndDeclaringTypeDict<Func<MethodDefinition, object[], bool>> boolDecrypters = new MethodDefinitionAndDeclaringTypeDict<Func<MethodDefinition, object[], bool>>();
class MyCallResult : CallResult {
public MethodReference methodReference;
public MyCallResult(Block block, int callEndIndex, MethodReference method)
: base(block, callEndIndex) {
this.methodReference = method;
}
}
public bool HasHandlers {
get { return boolDecrypters.Count != 0; }
}
public void add(MethodDefinition method, Func<MethodDefinition, object[], bool> handler) {
if (method != null)
boolDecrypters.add(method, handler);
}
protected override void inlineReturnValues(IList<CallResult> callResults) {
foreach (var callResult in callResults) {
var block = callResult.block;
int num = callResult.callEndIndex - callResult.callStartIndex + 1;
block.replace(callResult.callStartIndex, num, DotNetUtils.createLdci4((bool)callResult.returnValue ? 1 : 0));
Log.v("Decrypted boolean: {0}", callResult.returnValue);
}
}
protected override void inlineAllCalls() {
foreach (var tmp in callResults) {
var callResult = (MyCallResult)tmp;
var handler = boolDecrypters.find(callResult.methodReference);
callResult.returnValue = handler((MethodDefinition)callResult.methodReference, callResult.args);
}
}
protected override CallResult createCallResult(MethodReference method, Block block, int callInstrIndex) {
if (boolDecrypters.find(method) == null)
return null;
return new MyCallResult(block, callInstrIndex, method);
}
}
}

10
de4dot.code/deobfuscators/dotNET_Reactor/v4/Deobfuscator.cs
View File

@ -106,7 +106,7 @@ namespace de4dot.code.deobfuscators.dotNET_Reactor.v4 {
MethodsDecrypter methodsDecrypter;
StringDecrypter stringDecrypter;
BooleanDecrypter booleanDecrypter;
BoolValueInliner boolValueInliner;
BooleanValueInliner booleanValueInliner;
MetadataTokenObfuscator metadataTokenObfuscator;
AssemblyResolver assemblyResolver;
ResourceResolver resourceResolver;
@ -411,11 +411,11 @@ namespace de4dot.code.deobfuscators.dotNET_Reactor.v4 {
stringDecrypter.init(peImage, fileData, DeobfuscatedFile);
booleanDecrypter.init(fileData, DeobfuscatedFile);
boolValueInliner = new BoolValueInliner();
booleanValueInliner = new BooleanValueInliner();
emptyClass = new EmptyClass(module);
if (options.DecryptBools) {
boolValueInliner.add(booleanDecrypter.Method, (method, args) => {
booleanValueInliner.add(booleanDecrypter.Method, (method, args) => {
return booleanDecrypter.decrypt((int)args[0]);
});
}
@ -518,8 +518,8 @@ namespace de4dot.code.deobfuscators.dotNET_Reactor.v4 {
}
public override bool deobfuscateOther(Blocks blocks) {
if (boolValueInliner.HasHandlers)
return boolValueInliner.decrypt(blocks) > 0;
if (booleanValueInliner.HasHandlers)
return booleanValueInliner.decrypt(blocks) > 0;
return false;
}