- It's not static anymore - It implements ILogger - It can ignore errors/warnings but an option to disable it
771 lines
22 KiB
C#
771 lines
22 KiB
C#
/*
|
|
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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using dot10.DotNet;
|
|
using dot10.DotNet.Emit;
|
|
using dot10.DotNet.Writer;
|
|
using dot10.PE;
|
|
using de4dot.blocks;
|
|
using de4dot.blocks.cflow;
|
|
|
|
namespace de4dot.code.deobfuscators {
|
|
abstract class DeobfuscatorBase : IDeobfuscator, IModuleWriterListener {
|
|
public const string DEFAULT_VALID_NAME_REGEX = @"^[a-zA-Z_<{$][a-zA-Z_0-9<>{}$.`-]*$";
|
|
|
|
class RemoveInfo<T> {
|
|
public T obj;
|
|
public string reason;
|
|
public RemoveInfo(T obj, string reason) {
|
|
this.obj = obj;
|
|
this.reason = reason;
|
|
}
|
|
}
|
|
|
|
OptionsBase optionsBase;
|
|
protected ModuleDefMD module;
|
|
protected StaticStringInliner staticStringInliner = new StaticStringInliner();
|
|
IList<RemoveInfo<TypeDef>> typesToRemove = new List<RemoveInfo<TypeDef>>();
|
|
IList<RemoveInfo<MethodDef>> methodsToRemove = new List<RemoveInfo<MethodDef>>();
|
|
IList<RemoveInfo<FieldDef>> fieldsToRemove = new List<RemoveInfo<FieldDef>>();
|
|
IList<RemoveInfo<TypeDef>> attrsToRemove = new List<RemoveInfo<TypeDef>>();
|
|
IList<RemoveInfo<Resource>> resourcesToRemove = new List<RemoveInfo<Resource>>();
|
|
List<string> namesToPossiblyRemove = new List<string>();
|
|
MethodCallRemover methodCallRemover = new MethodCallRemover();
|
|
byte[] moduleBytes;
|
|
protected InitializedDataCreator initializedDataCreator;
|
|
|
|
protected byte[] ModuleBytes {
|
|
get { return moduleBytes; }
|
|
set { moduleBytes = value; }
|
|
}
|
|
|
|
internal class OptionsBase : IDeobfuscatorOptions {
|
|
public bool RenameResourcesInCode { get; set; }
|
|
public NameRegexes ValidNameRegex { get; set; }
|
|
public bool DecryptStrings { get; set; }
|
|
|
|
public OptionsBase() {
|
|
RenameResourcesInCode = true;
|
|
}
|
|
}
|
|
|
|
public IDeobfuscatorOptions TheOptions {
|
|
get { return optionsBase; }
|
|
}
|
|
|
|
public IOperations Operations { get; set; }
|
|
public IDeobfuscatedFile DeobfuscatedFile { get; set; }
|
|
public virtual StringFeatures StringFeatures { get; set; }
|
|
public virtual RenamingOptions RenamingOptions { get; set; }
|
|
public DecrypterType DefaultDecrypterType { get; set; }
|
|
|
|
public abstract string Type { get; }
|
|
public abstract string TypeLong { get; }
|
|
public abstract string Name { get; }
|
|
|
|
protected virtual bool CanInlineMethods {
|
|
get { return false; }
|
|
}
|
|
|
|
protected virtual bool KeepTypes {
|
|
get { return false; }
|
|
}
|
|
|
|
protected bool CanRemoveTypes {
|
|
get { return !Operations.KeepObfuscatorTypes && !KeepTypes; }
|
|
}
|
|
|
|
protected bool CanRemoveStringDecrypterType {
|
|
get { return Operations.DecryptStrings != OpDecryptString.None && staticStringInliner.InlinedAllCalls; }
|
|
}
|
|
|
|
public virtual IEnumerable<IBlocksDeobfuscator> BlocksDeobfuscators {
|
|
get {
|
|
var list = new List<IBlocksDeobfuscator>();
|
|
if (CanInlineMethods)
|
|
list.Add(new MethodCallInliner(false));
|
|
return list;
|
|
}
|
|
}
|
|
|
|
public DeobfuscatorBase(OptionsBase optionsBase) {
|
|
this.optionsBase = optionsBase;
|
|
StringFeatures = StringFeatures.AllowAll;
|
|
DefaultDecrypterType = DecrypterType.Static;
|
|
}
|
|
|
|
public virtual byte[] unpackNativeFile(IPEImage peImage) {
|
|
return null;
|
|
}
|
|
|
|
public virtual void init(ModuleDefMD module) {
|
|
setModule(module);
|
|
}
|
|
|
|
protected void setModule(ModuleDefMD module) {
|
|
this.module = module;
|
|
initializedDataCreator = new InitializedDataCreator(module);
|
|
}
|
|
|
|
protected virtual bool checkValidName(string name) {
|
|
return optionsBase.ValidNameRegex.isMatch(name);
|
|
}
|
|
|
|
public virtual int detect() {
|
|
scanForObfuscator();
|
|
return detectInternal();
|
|
}
|
|
|
|
protected abstract void scanForObfuscator();
|
|
protected abstract int detectInternal();
|
|
|
|
public virtual bool getDecryptedModule(int count, ref byte[] newFileData, ref DumpedMethods dumpedMethods) {
|
|
return false;
|
|
}
|
|
|
|
public virtual IDeobfuscator moduleReloaded(ModuleDefMD module) {
|
|
throw new ApplicationException("moduleReloaded() must be overridden by the deobfuscator");
|
|
}
|
|
|
|
public virtual void deobfuscateBegin() {
|
|
ModuleBytes = null;
|
|
}
|
|
|
|
public virtual void deobfuscateMethodBegin(Blocks blocks) {
|
|
}
|
|
|
|
public virtual void deobfuscateMethodEnd(Blocks blocks) {
|
|
removeMethodCalls(blocks);
|
|
}
|
|
|
|
public virtual void deobfuscateStrings(Blocks blocks) {
|
|
staticStringInliner.decrypt(blocks);
|
|
}
|
|
|
|
public virtual bool deobfuscateOther(Blocks blocks) {
|
|
return false;
|
|
}
|
|
|
|
public virtual void deobfuscateEnd() {
|
|
if (CanRemoveTypes) {
|
|
removeTypesWithInvalidBaseTypes();
|
|
|
|
deleteEmptyCctors();
|
|
deleteMethods();
|
|
deleteFields();
|
|
deleteCustomAttributes();
|
|
deleteOtherAttributes();
|
|
deleteTypes();
|
|
deleteDllResources();
|
|
}
|
|
|
|
restoreBaseType();
|
|
}
|
|
|
|
static bool isTypeWithInvalidBaseType(TypeDef moduleType, TypeDef type) {
|
|
return type.BaseType == null && !type.IsInterface && type != moduleType;
|
|
}
|
|
|
|
void restoreBaseType() {
|
|
var moduleType = DotNetUtils.getModuleType(module);
|
|
foreach (var type in module.GetTypes()) {
|
|
if (!isTypeWithInvalidBaseType(moduleType, type))
|
|
continue;
|
|
Logger.v("Adding System.Object as base type: {0} ({1:X8})",
|
|
Utils.removeNewlines(type),
|
|
type.MDToken.ToInt32());
|
|
type.BaseType = module.CorLibTypes.Object.TypeDefOrRef;
|
|
}
|
|
}
|
|
|
|
void removeTypesWithInvalidBaseTypes() {
|
|
var moduleType = DotNetUtils.getModuleType(module);
|
|
foreach (var type in module.GetTypes()) {
|
|
if (!isTypeWithInvalidBaseType(moduleType, type))
|
|
continue;
|
|
addTypeToBeRemoved(type, "Invalid type with no base type (anti-reflection)");
|
|
}
|
|
}
|
|
|
|
protected void fixEnumTypes() {
|
|
foreach (var type in module.GetTypes()) {
|
|
if (!type.IsEnum)
|
|
continue;
|
|
foreach (var field in type.Fields) {
|
|
if (field.IsStatic)
|
|
continue;
|
|
field.IsRTSpecialName = true;
|
|
field.IsSpecialName = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
protected void fixInterfaces() {
|
|
foreach (var type in module.GetTypes()) {
|
|
if (!type.IsInterface)
|
|
continue;
|
|
type.IsSealed = false;
|
|
}
|
|
}
|
|
|
|
public abstract IEnumerable<int> getStringDecrypterMethods();
|
|
|
|
class MethodCallRemover {
|
|
Dictionary<string, MethodDefinitionAndDeclaringTypeDict<bool>> methodNameInfos = new Dictionary<string, MethodDefinitionAndDeclaringTypeDict<bool>>();
|
|
MethodDefinitionAndDeclaringTypeDict<MethodDefinitionAndDeclaringTypeDict<bool>> methodRefInfos = new MethodDefinitionAndDeclaringTypeDict<MethodDefinitionAndDeclaringTypeDict<bool>>();
|
|
|
|
void checkMethod(IMethod methodToBeRemoved) {
|
|
var sig = methodToBeRemoved.MethodSig;
|
|
if (sig.Params.Count != 0)
|
|
throw new ApplicationException(string.Format("Method takes params: {0}", methodToBeRemoved));
|
|
if (sig.RetType.ElementType != ElementType.Void)
|
|
throw new ApplicationException(string.Format("Method has a return value: {0}", methodToBeRemoved));
|
|
}
|
|
|
|
public void add(string method, MethodDef methodToBeRemoved) {
|
|
if (methodToBeRemoved == null)
|
|
return;
|
|
checkMethod(methodToBeRemoved);
|
|
|
|
MethodDefinitionAndDeclaringTypeDict<bool> dict;
|
|
if (!methodNameInfos.TryGetValue(method, out dict))
|
|
methodNameInfos[method] = dict = new MethodDefinitionAndDeclaringTypeDict<bool>();
|
|
dict.add(methodToBeRemoved, true);
|
|
}
|
|
|
|
public void add(MethodDef method, MethodDef methodToBeRemoved) {
|
|
if (method == null || methodToBeRemoved == null)
|
|
return;
|
|
checkMethod(methodToBeRemoved);
|
|
|
|
var dict = methodRefInfos.find(method);
|
|
if (dict == null)
|
|
methodRefInfos.add(method, dict = new MethodDefinitionAndDeclaringTypeDict<bool>());
|
|
dict.add(methodToBeRemoved, true);
|
|
}
|
|
|
|
public void removeAll(Blocks blocks) {
|
|
var allBlocks = blocks.MethodBlocks.getAllBlocks();
|
|
|
|
removeAll(allBlocks, blocks, blocks.Method.Name.String);
|
|
removeAll(allBlocks, blocks, blocks.Method);
|
|
}
|
|
|
|
void removeAll(IList<Block> allBlocks, Blocks blocks, string method) {
|
|
MethodDefinitionAndDeclaringTypeDict<bool> info;
|
|
if (!methodNameInfos.TryGetValue(method, out info))
|
|
return;
|
|
|
|
removeCalls(allBlocks, blocks, info);
|
|
}
|
|
|
|
void removeAll(IList<Block> allBlocks, Blocks blocks, MethodDef method) {
|
|
var info = methodRefInfos.find(method);
|
|
if (info == null)
|
|
return;
|
|
|
|
removeCalls(allBlocks, blocks, info);
|
|
}
|
|
|
|
void removeCalls(IList<Block> allBlocks, Blocks blocks, MethodDefinitionAndDeclaringTypeDict<bool> info) {
|
|
var instrsToDelete = new List<int>();
|
|
foreach (var block in allBlocks) {
|
|
instrsToDelete.Clear();
|
|
for (int i = 0; i < block.Instructions.Count; i++) {
|
|
var instr = block.Instructions[i];
|
|
if (instr.OpCode != OpCodes.Call)
|
|
continue;
|
|
var destMethod = instr.Operand as IMethod;
|
|
if (destMethod == null)
|
|
continue;
|
|
|
|
if (info.find(destMethod)) {
|
|
Logger.v("Removed call to {0}", Utils.removeNewlines(destMethod));
|
|
instrsToDelete.Add(i);
|
|
}
|
|
}
|
|
block.remove(instrsToDelete);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void addCctorInitCallToBeRemoved(MethodDef methodToBeRemoved) {
|
|
methodCallRemover.add(".cctor", methodToBeRemoved);
|
|
}
|
|
|
|
public void addModuleCctorInitCallToBeRemoved(MethodDef methodToBeRemoved) {
|
|
methodCallRemover.add(DotNetUtils.getModuleTypeCctor(module), methodToBeRemoved);
|
|
}
|
|
|
|
public void addCtorInitCallToBeRemoved(MethodDef methodToBeRemoved) {
|
|
methodCallRemover.add(".ctor", methodToBeRemoved);
|
|
}
|
|
|
|
public void addCallToBeRemoved(MethodDef method, MethodDef methodToBeRemoved) {
|
|
methodCallRemover.add(method, methodToBeRemoved);
|
|
}
|
|
|
|
void removeMethodCalls(Blocks blocks) {
|
|
methodCallRemover.removeAll(blocks);
|
|
}
|
|
|
|
protected void addMethodsToBeRemoved(IEnumerable<MethodDef> methods, string reason) {
|
|
foreach (var method in methods)
|
|
addMethodToBeRemoved(method, reason);
|
|
}
|
|
|
|
protected void addMethodToBeRemoved(MethodDef method, string reason) {
|
|
if (method != null)
|
|
methodsToRemove.Add(new RemoveInfo<MethodDef>(method, reason));
|
|
}
|
|
|
|
protected void addFieldsToBeRemoved(IEnumerable<FieldDef> fields, string reason) {
|
|
foreach (var field in fields)
|
|
addFieldToBeRemoved(field, reason);
|
|
}
|
|
|
|
protected void addFieldToBeRemoved(FieldDef field, string reason) {
|
|
if (field != null)
|
|
fieldsToRemove.Add(new RemoveInfo<FieldDef>(field, reason));
|
|
}
|
|
|
|
protected void addAttributesToBeRemoved(IEnumerable<TypeDef> attrs, string reason) {
|
|
foreach (var attr in attrs)
|
|
addAttributeToBeRemoved(attr, reason);
|
|
}
|
|
|
|
protected void addAttributeToBeRemoved(TypeDef attr, string reason) {
|
|
if (attr == null)
|
|
return;
|
|
addTypeToBeRemoved(attr, reason);
|
|
attrsToRemove.Add(new RemoveInfo<TypeDef>(attr, reason));
|
|
}
|
|
|
|
protected void addTypesToBeRemoved(IEnumerable<TypeDef> types, string reason) {
|
|
foreach (var type in types)
|
|
addTypeToBeRemoved(type, reason);
|
|
}
|
|
|
|
protected void addTypeToBeRemoved(TypeDef type, string reason) {
|
|
if (type != null)
|
|
typesToRemove.Add(new RemoveInfo<TypeDef>(type, reason));
|
|
}
|
|
|
|
protected void addResourceToBeRemoved(Resource resource, string reason) {
|
|
if (resource != null)
|
|
resourcesToRemove.Add(new RemoveInfo<Resource>(resource, reason));
|
|
}
|
|
|
|
void deleteEmptyCctors() {
|
|
var emptyCctorsToRemove = new List<MethodDef>();
|
|
foreach (var type in module.GetTypes()) {
|
|
var cctor = type.FindClassConstructor();
|
|
if (cctor != null && DotNetUtils.isEmpty(cctor))
|
|
emptyCctorsToRemove.Add(cctor);
|
|
}
|
|
|
|
if (emptyCctorsToRemove.Count == 0)
|
|
return;
|
|
|
|
Logger.v("Removing empty .cctor methods");
|
|
Logger.Instance.indent();
|
|
foreach (var cctor in emptyCctorsToRemove) {
|
|
var type = cctor.DeclaringType;
|
|
if (type == null)
|
|
continue;
|
|
if (type.Methods.Remove(cctor))
|
|
Logger.v("{0:X8}, type: {1} ({2:X8})",
|
|
cctor.MDToken.ToUInt32(),
|
|
Utils.removeNewlines(type),
|
|
type.MDToken.ToUInt32());
|
|
}
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
void deleteMethods() {
|
|
if (methodsToRemove.Count == 0)
|
|
return;
|
|
|
|
Logger.v("Removing methods");
|
|
Logger.Instance.indent();
|
|
foreach (var info in methodsToRemove) {
|
|
var method = info.obj;
|
|
if (method == null)
|
|
continue;
|
|
var type = method.DeclaringType;
|
|
if (type == null)
|
|
continue;
|
|
if (type.Methods.Remove(method))
|
|
Logger.v("Removed method {0} ({1:X8}) (Type: {2}) (reason: {3})",
|
|
Utils.removeNewlines(method),
|
|
method.MDToken.ToUInt32(),
|
|
Utils.removeNewlines(type),
|
|
info.reason);
|
|
}
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
void deleteFields() {
|
|
if (fieldsToRemove.Count == 0)
|
|
return;
|
|
|
|
Logger.v("Removing fields");
|
|
Logger.Instance.indent();
|
|
foreach (var info in fieldsToRemove) {
|
|
var field = info.obj;
|
|
if (field == null)
|
|
continue;
|
|
var type = field.DeclaringType;
|
|
if (type == null)
|
|
continue;
|
|
if (type.Fields.Remove(field))
|
|
Logger.v("Removed field {0} ({1:X8}) (Type: {2}) (reason: {3})",
|
|
Utils.removeNewlines(field),
|
|
field.MDToken.ToUInt32(),
|
|
Utils.removeNewlines(type),
|
|
info.reason);
|
|
}
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
void deleteTypes() {
|
|
var types = module.Types;
|
|
if (types == null || typesToRemove.Count == 0)
|
|
return;
|
|
|
|
Logger.v("Removing types");
|
|
Logger.Instance.indent();
|
|
var moduleType = DotNetUtils.getModuleType(module);
|
|
foreach (var info in typesToRemove) {
|
|
var typeDef = info.obj;
|
|
if (typeDef == null || typeDef == moduleType)
|
|
continue;
|
|
bool removed;
|
|
if (typeDef.DeclaringType != null)
|
|
removed = typeDef.DeclaringType.NestedTypes.Remove(typeDef);
|
|
else
|
|
removed = types.Remove(typeDef);
|
|
if (removed)
|
|
Logger.v("Removed type {0} ({1:X8}) (reason: {2})",
|
|
Utils.removeNewlines(typeDef),
|
|
typeDef.MDToken.ToUInt32(),
|
|
info.reason);
|
|
}
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
void deleteCustomAttributes() {
|
|
if (attrsToRemove.Count == 0)
|
|
return;
|
|
|
|
Logger.v("Removing custom attributes");
|
|
Logger.Instance.indent();
|
|
deleteCustomAttributes(module.CustomAttributes);
|
|
if (module.Assembly != null)
|
|
deleteCustomAttributes(module.Assembly.CustomAttributes);
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
void deleteCustomAttributes(IList<CustomAttribute> customAttrs) {
|
|
if (customAttrs == null)
|
|
return;
|
|
foreach (var info in attrsToRemove) {
|
|
var typeDef = info.obj;
|
|
if (typeDef == null)
|
|
continue;
|
|
for (int i = 0; i < customAttrs.Count; i++) {
|
|
if (new SigComparer().Equals(typeDef, customAttrs[i].AttributeType)) {
|
|
customAttrs.RemoveAt(i);
|
|
i--;
|
|
Logger.v("Removed custom attribute {0} ({1:X8}) (reason: {2})",
|
|
Utils.removeNewlines(typeDef),
|
|
typeDef.MDToken.ToUInt32(),
|
|
info.reason);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void deleteOtherAttributes() {
|
|
Logger.v("Removing other attributes");
|
|
Logger.Instance.indent();
|
|
deleteOtherAttributes(module.CustomAttributes);
|
|
if (module.Assembly != null)
|
|
deleteOtherAttributes(module.Assembly.CustomAttributes);
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
void deleteOtherAttributes(IList<CustomAttribute> customAttributes) {
|
|
for (int i = customAttributes.Count - 1; i >= 0; i--) {
|
|
var attr = customAttributes[i].TypeFullName;
|
|
if (attr == "System.Runtime.CompilerServices.SuppressIldasmAttribute") {
|
|
Logger.v("Removed attribute {0}", Utils.removeNewlines(attr));
|
|
customAttributes.RemoveAt(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
void deleteDllResources() {
|
|
if (!module.HasResources || resourcesToRemove.Count == 0)
|
|
return;
|
|
|
|
Logger.v("Removing resources");
|
|
Logger.Instance.indent();
|
|
foreach (var info in resourcesToRemove) {
|
|
var resource = info.obj;
|
|
if (resource == null)
|
|
continue;
|
|
if (module.Resources.Remove(resource))
|
|
Logger.v("Removed resource {0} (reason: {1})", Utils.toCsharpString(resource.Name), info.reason);
|
|
}
|
|
Logger.Instance.deIndent();
|
|
}
|
|
|
|
protected void setInitLocals() {
|
|
foreach (var type in module.GetTypes()) {
|
|
foreach (var method in type.Methods) {
|
|
if (isFatHeader(method))
|
|
method.Body.InitLocals = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool isFatHeader(MethodDef method) {
|
|
if (method == null || method.Body == null)
|
|
return false;
|
|
var body = method.Body;
|
|
if (body.InitLocals || body.MaxStack > 8)
|
|
return true;
|
|
if (body.LocalList.Count > 0)
|
|
return true;
|
|
if (body.ExceptionHandlers.Count > 0)
|
|
return true;
|
|
if (getCodeSize(method) > 63)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int getCodeSize(MethodDef method) {
|
|
if (method == null || method.Body == null)
|
|
return 0;
|
|
int size = 0;
|
|
foreach (var instr in method.Body.Instructions)
|
|
size += instr.GetSize();
|
|
return size;
|
|
}
|
|
|
|
public override string ToString() {
|
|
return Name;
|
|
}
|
|
|
|
protected void findPossibleNamesToRemove(MethodDef method) {
|
|
if (method == null || !method.HasBody)
|
|
return;
|
|
|
|
foreach (var instr in method.Body.Instructions) {
|
|
if (instr.OpCode == OpCodes.Ldstr)
|
|
namesToPossiblyRemove.Add((string)instr.Operand);
|
|
}
|
|
}
|
|
|
|
protected void addResources(string reason) {
|
|
if (!module.HasResources)
|
|
return;
|
|
|
|
foreach (var name in namesToPossiblyRemove) {
|
|
foreach (var resource in module.Resources) {
|
|
if (resource.Name == name) {
|
|
addResourceToBeRemoved(resource, reason);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
protected bool removeProxyDelegates(ProxyCallFixerBase proxyCallFixer) {
|
|
return removeProxyDelegates(proxyCallFixer, true);
|
|
}
|
|
|
|
protected bool removeProxyDelegates(ProxyCallFixerBase proxyCallFixer, bool removeCreators) {
|
|
if (proxyCallFixer.Errors != 0) {
|
|
Logger.v("Not removing proxy delegates and creator type since errors were detected.");
|
|
return false;
|
|
}
|
|
addTypesToBeRemoved(proxyCallFixer.DelegateTypes, "Proxy delegate type");
|
|
if (removeCreators && proxyCallFixer.RemovedDelegateCreatorCalls > 0) {
|
|
addTypesToBeRemoved(proxyCallFixer.DelegateCreatorTypes, "Proxy delegate creator type");
|
|
foreach (var tuple in proxyCallFixer.OtherMethods)
|
|
addMethodToBeRemoved(tuple.Item1, tuple.Item2);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
protected Resource getResource(IEnumerable<string> strings) {
|
|
return DotNetUtils.getResource(module, strings);
|
|
}
|
|
|
|
protected CustomAttribute getAssemblyAttribute(IType attr) {
|
|
if (module.Assembly == null)
|
|
return null;
|
|
return module.Assembly.CustomAttributes.Find(attr);
|
|
}
|
|
|
|
protected CustomAttribute getModuleAttribute(IType attr) {
|
|
return module.CustomAttributes.Find(attr);
|
|
}
|
|
|
|
protected bool hasMetadataStream(string name) {
|
|
foreach (var stream in module.MetaData.AllStreams) {
|
|
if (stream.Name == name)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
List<T> getObjectsToRemove<T>(IList<RemoveInfo<T>> removeThese) where T : class, ICodedToken {
|
|
var list = new List<T>(removeThese.Count);
|
|
foreach (var info in removeThese) {
|
|
if (info.obj != null)
|
|
list.Add(info.obj);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
protected List<TypeDef> getTypesToRemove() {
|
|
return getObjectsToRemove(typesToRemove);
|
|
}
|
|
|
|
protected List<MethodDef> getMethodsToRemove() {
|
|
return getObjectsToRemove(methodsToRemove);
|
|
}
|
|
|
|
public virtual bool isValidNamespaceName(string ns) {
|
|
if (ns == null)
|
|
return false;
|
|
foreach (var part in ns.Split(new char[] { '.' })) {
|
|
if (!checkValidName(part))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
public virtual bool isValidTypeName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidMethodName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidPropertyName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidEventName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidFieldName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidGenericParamName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidMethodArgName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidMethodReturnArgName(string name) {
|
|
return string.IsNullOrEmpty(name) || checkValidName(name);
|
|
}
|
|
|
|
public virtual bool isValidResourceKeyName(string name) {
|
|
return name != null && checkValidName(name);
|
|
}
|
|
|
|
public virtual void OnWriterEvent(ModuleWriter writer, ModuleWriterEvent evt) {
|
|
}
|
|
|
|
protected void findAndRemoveInlinedMethods() {
|
|
removeInlinedMethods(InlinedMethodsFinder.find(module));
|
|
}
|
|
|
|
protected void removeInlinedMethods(List<MethodDef> inlinedMethods) {
|
|
addMethodsToBeRemoved(new UnusedMethodsFinder(module, inlinedMethods, getRemovedMethods()).find(), "Inlined method");
|
|
}
|
|
|
|
protected MethodCollection getRemovedMethods() {
|
|
var removedMethods = new MethodCollection();
|
|
removedMethods.add(getMethodsToRemove());
|
|
removedMethods.addAndNested(getTypesToRemove());
|
|
return removedMethods;
|
|
}
|
|
|
|
protected bool isTypeCalled(TypeDef decrypterType) {
|
|
if (decrypterType == null)
|
|
return false;
|
|
|
|
var decrypterMethods = new MethodCollection();
|
|
decrypterMethods.addAndNested(decrypterType);
|
|
|
|
var removedMethods = getRemovedMethods();
|
|
|
|
foreach (var type in module.GetTypes()) {
|
|
foreach (var method in type.Methods) {
|
|
if (method.Body == null)
|
|
continue;
|
|
if (decrypterMethods.exists(method))
|
|
break; // decrypter type / nested type method
|
|
if (removedMethods.exists(method))
|
|
continue;
|
|
|
|
foreach (var instr in method.Body.Instructions) {
|
|
switch (instr.OpCode.Code) {
|
|
case Code.Call:
|
|
case Code.Callvirt:
|
|
case Code.Newobj:
|
|
var calledMethod = instr.Operand as IMethod;
|
|
if (calledMethod == null)
|
|
break;
|
|
if (decrypterMethods.exists(calledMethod))
|
|
return true;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
protected static int toInt32(bool b) {
|
|
return b ? 1 : 0;
|
|
}
|
|
}
|
|
}
|