protected override void Execute(ConfuserContext context, ProtectionParameters parameters) {
foreach (ModuleDef module in parameters.Targets.OfType<ModuleDef>()) {
TypeRef attrRef = module.CorLibTypes.GetTypeRef("System.Runtime.CompilerServices", "SuppressIldasmAttribute");
var ctorRef = new MemberRefUser(module, ".ctor", MethodSig.CreateInstance(module.CorLibTypes.Void), attrRef);
var attr = new CustomAttribute(ctorRef);
module.CustomAttributes.Add(attr);
}
}
public static void Run() {
// Create a new module. The string passed in is the name of the module,
// not the file name.
ModuleDef mod = new ModuleDefUser("MyModule.exe");
// It's a console application
mod.Kind = ModuleKind.Console;
// Add the module to an assembly
AssemblyDef asm = new AssemblyDefUser("MyAssembly", new Version(1, 2, 3, 4), null, null);
asm.Modules.Add(mod);
// Add a .NET resource
byte[] resourceData = Encoding.UTF8.GetBytes("Hello, world!");
mod.Resources.Add(new EmbeddedResource("My.Resource", resourceData,
ManifestResourceAttributes.Private));
// Add the startup type. It derives from System.Object.
TypeDef startUpType = new TypeDefUser("My.Namespace", "Startup", mod.CorLibTypes.Object.TypeDefOrRef);
startUpType.Attributes = TypeAttributes.NotPublic | TypeAttributes.AutoLayout |
TypeAttributes.Class | TypeAttributes.AnsiClass;
// Add the type to the module
mod.Types.Add(startUpType);
// Create the entry point method
MethodDef entryPoint = new MethodDefUser("Main",
MethodSig.CreateStatic(mod.CorLibTypes.Int32, new SZArraySig(mod.CorLibTypes.String)));
entryPoint.Attributes = MethodAttributes.Private | MethodAttributes.Static |
MethodAttributes.HideBySig | MethodAttributes.ReuseSlot;
entryPoint.ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed;
// Name the 1st argument (argument 0 is the return type)
entryPoint.ParamDefs.Add(new ParamDefUser("args", 1));
// Add the method to the startup type
startUpType.Methods.Add(entryPoint);
// Set module entry point
mod.EntryPoint = entryPoint;
// Create a TypeRef to System.Console
TypeRef consoleRef = new TypeRefUser(mod, "System", "Console", mod.CorLibTypes.AssemblyRef);
// Create a method ref to 'System.Void System.Console::WriteLine(System.String)'
MemberRef consoleWrite1 = new MemberRefUser(mod, "WriteLine",
MethodSig.CreateStatic(mod.CorLibTypes.Void, mod.CorLibTypes.String),
consoleRef);
// Add a CIL method body to the entry point method
CilBody epBody = new CilBody();
entryPoint.Body = epBody;
epBody.Instructions.Add(OpCodes.Ldstr.ToInstruction("Hello World!"));
epBody.Instructions.Add(OpCodes.Call.ToInstruction(consoleWrite1));
epBody.Instructions.Add(OpCodes.Ldc_I4_0.ToInstruction());
epBody.Instructions.Add(OpCodes.Ret.ToInstruction());
// Save the assembly to a file on disk
mod.Write(@"C:\saved-assembly.exe");
}
/// <summary>
/// Resolve an IField from its name and a declaring TypeSpec.
/// </summary>
/// <param name="declaringType">Declaring TypeSpec</param>
/// <param name="fieldName">Field name</param>
/// <returns>IField, or null if none found</returns>
public IField ResolveField(TypeSpec declaringType, String fieldName)
{
TypeDef typeDef = declaringType.ResolveTypeDef();
if (typeDef == null)
return null;
FieldDef fieldDef = typeDef.FindField(fieldName);
if (fieldDef == null)
return null;
MemberRef memberRef = new MemberRefUser(_module, fieldDef.Name, fieldDef.FieldSig, declaringType);
return this.Importer.Import(memberRef);
}
void InitializeCtors(TypeDef manager, MethodDefAndDeclaringTypeDict<IMethod> ctors) {
if (manager == null)
return;
foreach (var ctor in manager.Methods) {
if (ctor.Name != ".ctor")
continue;
var newCtor = new MemberRefUser(module, ctor.Name, ctor.MethodSig.Clone(), manager.BaseType);
module.UpdateRowId(newCtor);
ctors.Add(ctor, newCtor);
}
}
IMDTokenProvider Create_SystemArray_get_Length()
{
if (Create_SystemArray_get_Length_result_initd)
return Create_SystemArray_get_Length_result;
Create_SystemArray_get_Length_result_initd = true;
var module = GetModule();
if (module == null)
return null;
const string propName = "Length";
var type = module.CorLibTypes.GetTypeRef("System", "Array");
var retType = module.CorLibTypes.Int32;
var mr = new MemberRefUser(module, "get_" + propName, MethodSig.CreateInstance(retType), type);
Create_SystemArray_get_Length_result = mr;
var md = mr.ResolveMethod();
if (md == null || md.DeclaringType == null)
return mr;
var prop = md.DeclaringType.FindProperty(propName);
if (prop == null)
return mr;
Create_SystemArray_get_Length_result = prop;
return prop;
}
IMethod ResolveMethod_NoLock(TypeSpec declaringSpec, MethodData data)
{
// Find a method that matches the signature (factoring in possible generic vars/mvars)
MethodSig matchedSig = null;
MethodDef method = FindMethodCheckBaseType(declaringSpec, data, out matchedSig);
if (matchedSig == null || method == null)
{
throw new Exception(String.Format(
"Unable to find generic method from the declaring/base types: DeclaringType={0}, MethodName={1}",
declaringSpec.ReflectionFullName, data.Name));
}
MemberRef memberRef = new MemberRefUser(this.Module, method.Name, matchedSig, declaringSpec);
if (data.HasGenericArguments)
return this.Importer.Import(new MethodSpecUser(memberRef, ToGenericInstMethodSig(data)));
else
return this.Importer.Import(memberRef);
}
public IMethod ReadMethodRef() {
var babelMethodRef = new MethodRefReader(this, reader).Read();
var method = GetMethodRef(babelMethodRef);
if (method == null) {
throw new ApplicationException(string.Format("Could not find method '{0}' in type '{1}'",
Utils.RemoveNewlines(babelMethodRef.Name),
Utils.RemoveNewlines(babelMethodRef.DeclaringType)));
}
var git = babelMethodRef.DeclaringType.ToGenericInstSig();
if (git == null)
return method;
var mr = new MemberRefUser(module, method.Name, method.MethodSig.Clone(), babelMethodRef.DeclaringType.ToTypeDefOrRef());
return module.UpdateRowId(mr);
}
IMDTokenProvider Create_SystemType_get_TypeHandle()
{
if (Create_SystemType_get_TypeHandle_initd)
return Create_SystemType_get_TypeHandle_result;
Create_SystemType_get_TypeHandle_initd = true;
const string propName = "TypeHandle";
var type = corLib.GetTypeRef("System", "Type");
var retType = new ValueTypeSig(corLib.GetTypeRef("System", "RuntimeTypeHandle"));
var mr = new MemberRefUser(methodDef.Module, "get_" + propName, MethodSig.CreateInstance(retType), type);
Create_SystemType_get_TypeHandle_result = mr;
var md = mr.ResolveMethod();
if (md == null || md.DeclaringType == null)
return mr;
var prop = md.DeclaringType.FindProperty(propName);
if (prop == null)
return mr;
Create_SystemType_get_TypeHandle_result = prop;
return prop;
}
public static void Run() {
// This is the file that will be created
string newFileName = @"C:\ctor-test.exe";
// Create the module
var mod = new ModuleDefUser("ctor-test", Guid.NewGuid(),
new AssemblyRefUser(new AssemblyNameInfo(typeof(int).Assembly.GetName().FullName)));
// It's a console app
mod.Kind = ModuleKind.Console;
// Create the assembly and add the created module to it
new AssemblyDefUser("ctor-test", new Version(1, 2, 3, 4)).Modules.Add(mod);
// Create System.Console type reference
var systemConsole = mod.CorLibTypes.GetTypeRef("System", "Console");
// Create 'void System.Console.WriteLine(string,object)' method reference
var writeLine2 = new MemberRefUser(mod, "WriteLine",
MethodSig.CreateStatic(mod.CorLibTypes.Void, mod.CorLibTypes.String,
mod.CorLibTypes.Object),
systemConsole);
// Create System.Object::.ctor method reference. This is the default constructor
var objectCtor = new MemberRefUser(mod, ".ctor",
MethodSig.CreateInstance(mod.CorLibTypes.Void),
mod.CorLibTypes.Object.TypeDefOrRef);
CilBody body;
// Create the base class
var bclass = new TypeDefUser("Ctor.Test", "BaseClass", mod.CorLibTypes.Object.TypeDefOrRef);
// Add it to the module
mod.Types.Add(bclass);
// Create Ctor.Test.BaseClass constructor: BaseClass()
var bctor = new MethodDefUser(".ctor", MethodSig.CreateInstance(mod.CorLibTypes.Void),
MethodImplAttributes.IL | MethodImplAttributes.Managed,
MethodAttributes.Public |
MethodAttributes.SpecialName | MethodAttributes.RTSpecialName);
// Add the method to BaseClass
bclass.Methods.Add(bctor);
// Create method body and add a few instructions
bctor.Body = body = new CilBody();
// Make sure we call the base class' constructor
body.Instructions.Add(OpCodes.Ldarg_0.ToInstruction());
body.Instructions.Add(OpCodes.Call.ToInstruction(objectCtor));
body.Instructions.Add(OpCodes.Ldstr.ToInstruction("BaseClass: Default .ctor called"));
body.Instructions.Add(OpCodes.Ldnull.ToInstruction());
body.Instructions.Add(OpCodes.Call.ToInstruction(writeLine2));
body.Instructions.Add(OpCodes.Ret.ToInstruction());
// Create the Ctor.Test.Main type which derives from Ctor.Test.BaseClass
var main = new TypeDefUser("Ctor.Test", "Main", bclass);
// Add it to the module
mod.Types.Add(main);
// Create the static 'void Main()' method
var entryPoint = new MethodDefUser("Main", MethodSig.CreateStatic(mod.CorLibTypes.Void),
MethodImplAttributes.IL | MethodImplAttributes.Managed,
MethodAttributes.Public | MethodAttributes.Static);
// Set entry point to entryPoint and add it as a Ctor.Test.Main method
mod.EntryPoint = entryPoint;
main.Methods.Add(entryPoint);
// Create first Ctor.Test.Main constructor: Main()
var ctor0 = new MethodDefUser(".ctor", MethodSig.CreateInstance(mod.CorLibTypes.Void),
MethodImplAttributes.IL | MethodImplAttributes.Managed,
MethodAttributes.Public |
MethodAttributes.SpecialName | MethodAttributes.RTSpecialName);
// Add the method to Main
main.Methods.Add(ctor0);
// Create method body and add a few instructions
ctor0.Body = body = new CilBody();
// Make sure we call the base class' constructor
body.Instructions.Add(OpCodes.Ldarg_0.ToInstruction());
body.Instructions.Add(OpCodes.Call.ToInstruction(bctor));
body.Instructions.Add(OpCodes.Ldstr.ToInstruction("Default .ctor called"));
body.Instructions.Add(OpCodes.Ldnull.ToInstruction());
body.Instructions.Add(OpCodes.Call.ToInstruction(writeLine2));
body.Instructions.Add(OpCodes.Ret.ToInstruction());
// Create second Ctor.Test.Main constructor: Main(int,string)
var ctor1 = new MethodDefUser(".ctor", MethodSig.CreateInstance(mod.CorLibTypes.Void, mod.CorLibTypes.Int32, mod.CorLibTypes.String),
MethodImplAttributes.IL | MethodImplAttributes.Managed,
MethodAttributes.Public |
MethodAttributes.SpecialName | MethodAttributes.RTSpecialName);
// Add the method to Main
main.Methods.Add(ctor1);
// Create names for the arguments. This is optional. Since this is an instance method
// (it's a constructor), the first arg is the 'this' pointer. The normal arguments
// begin at index 1.
ctor1.Parameters[1].CreateParamDef();
ctor1.Parameters[1].ParamDef.Name = "count";
ctor1.Parameters[2].CreateParamDef();
ctor1.Parameters[2].ParamDef.Name = "name";
// Create method body and add a few instructions
ctor1.Body = body = new CilBody();
// Make sure we call the base class' constructor
body.Instructions.Add(OpCodes.Ldarg_0.ToInstruction());
body.Instructions.Add(OpCodes.Call.ToInstruction(bctor));
body.Instructions.Add(OpCodes.Ldstr.ToInstruction(".ctor(Int32) called with arg {0}"));
body.Instructions.Add(OpCodes.Ldarg_1.ToInstruction());
body.Instructions.Add(OpCodes.Box.ToInstruction(mod.CorLibTypes.Int32));
body.Instructions.Add(OpCodes.Call.ToInstruction(writeLine2));
body.Instructions.Add(OpCodes.Ret.ToInstruction());
// Create the entry point method body and add instructions to allocate a new Main()
// object and call the two created ctors.
entryPoint.Body = body = new CilBody();
body.Instructions.Add(OpCodes.Newobj.ToInstruction(ctor0));
body.Instructions.Add(OpCodes.Pop.ToInstruction());
body.Instructions.Add(OpCodes.Ldc_I4.ToInstruction(12345));
body.Instructions.Add(OpCodes.Ldnull.ToInstruction());
body.Instructions.Add(OpCodes.Newobj.ToInstruction(ctor1));
body.Instructions.Add(OpCodes.Pop.ToInstruction());
body.Instructions.Add(OpCodes.Ret.ToInstruction());
// Save the assembly
mod.Write(newFileName);
}
public static void Run()
{
// This is the file that will be created
string newFileName = @"GenericExample1.exe";
// Create the module
var mod = new ModuleDefUser("GenericExample1", Guid.NewGuid(),
new AssemblyRefUser(new AssemblyNameInfo(typeof(int).Assembly.GetName().FullName)));
// It's a console app
mod.Kind = ModuleKind.Console;
// Create the assembly and add the created module to it
new AssemblyDefUser("GenericExample1", new Version(1, 2, 3, 4)).Modules.Add(mod);
// Add the startup type. It derives from System.Object.
TypeDef startUpType = new TypeDefUser("My.Namespace", "Startup", mod.CorLibTypes.Object.TypeDefOrRef);
startUpType.Attributes = TypeAttributes.NotPublic | TypeAttributes.AutoLayout |
TypeAttributes.Class | TypeAttributes.AnsiClass;
// Add the type to the module
mod.Types.Add(startUpType);
// Create the entry point method
MethodDef entryPoint = new MethodDefUser("Main",
MethodSig.CreateStatic(mod.CorLibTypes.Int32, new SZArraySig(mod.CorLibTypes.String)));
entryPoint.Attributes = MethodAttributes.Private | MethodAttributes.Static |
MethodAttributes.HideBySig | MethodAttributes.ReuseSlot;
entryPoint.ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed;
// Name the 1st argument (argument 0 is the return type)
entryPoint.ParamDefs.Add(new ParamDefUser("args", 1));
// Add the method to the startup type
startUpType.Methods.Add(entryPoint);
// Set module entry point
mod.EntryPoint = entryPoint;
// Create System.Console type reference
var systemConsole = mod.CorLibTypes.GetTypeRef("System", "Console");
// Create 'void System.Console.WriteLine(string,object)' method reference
var writeLine2 = new MemberRefUser(mod, "WriteLine",
MethodSig.CreateStatic(mod.CorLibTypes.Void, mod.CorLibTypes.String,
mod.CorLibTypes.Object),
systemConsole);
//
// Method 1: Create List<String> inst signature by importing (easy way)
// --------------------------------------------------------------------
//Importer importer = new Importer(mod);
//var listGenericInstSig = importer.ImportAsTypeSig(typeof(System.Collections.Generic.List<String>));
//
// Method 2: Create List<String> inst signature manually (harder way)
// ------------------------------------------------------------------
var assemblyRef = mod.CorLibTypes.AssemblyRef;
var listRef = new TypeRefUser(mod, @"System.Collections.Generic", "List`1", assemblyRef);
// Create the GenericInstSig from a ClassSig with <String> generic arg
var listGenericInstSig = new GenericInstSig(new ClassSig(listRef), mod.CorLibTypes.String);
// Create TypeSpec from GenericInstSig
var listTypeSpec = new TypeSpecUser(listGenericInstSig);
// Create System.Collections.Generic.List<String>::.ctor method reference
var listCtor = new MemberRefUser(mod, ".ctor", MethodSig.CreateInstance(mod.CorLibTypes.Void),
listTypeSpec);
// Create Add(!0) method reference, !0 signifying first generic argument of declaring type
// In this case, would be Add(String item)
// (GenericMVar would be used for method generic argument, such as Add<!!0>(!!0))
var listAdd = new MemberRefUser(mod, "Add",
MethodSig.CreateInstance(mod.CorLibTypes.Void, new GenericVar(0)),
listTypeSpec);
var listGetCount = new MemberRefUser(mod, "get_Count",
MethodSig.CreateInstance(mod.CorLibTypes.Int32),
listTypeSpec);
IList<Local> locals = new List<Local>();
locals.Add(new Local(listGenericInstSig)); // local[0]: class [mscorlib]System.Collections.Generic.List`1<string>
var body = new CilBody(true, new List<Instruction>(), new List<ExceptionHandler>(), locals);
// Call the list .ctor
body.Instructions.Add(OpCodes.Newobj.ToInstruction(listCtor));
body.Instructions.Add(OpCodes.Stloc_0.ToInstruction()); // Store list to local[0]
// list.Add("Item 1")
body.Instructions.Add(OpCodes.Ldloc_0.ToInstruction());
body.Instructions.Add(OpCodes.Ldstr.ToInstruction("Item 1"));
body.Instructions.Add(OpCodes.Callvirt.ToInstruction(listAdd));
// WriteLine("Array: {0}", list.ToArray());
//body.Instructions.Add(OpCodes.Ldstr.ToInstruction("Array: {0}"));
//body.Instructions.Add(OpCodes.Ldloc_0.ToInstruction()); // Load list from local[0]
//body.Instructions.Add(OpCodes.Callvirt.ToInstruction(listToArray));
//body.Instructions.Add(OpCodes.Call.ToInstruction(writeLine2));
// WriteLine("Count: {0}", list.Count)
body.Instructions.Add(OpCodes.Ldstr.ToInstruction("Count: {0}"));
body.Instructions.Add(OpCodes.Ldloc_0.ToInstruction()); // Load list from local[0]
body.Instructions.Add(OpCodes.Callvirt.ToInstruction(listGetCount));
body.Instructions.Add(OpCodes.Box.ToInstruction(mod.CorLibTypes.Int32));
body.Instructions.Add(OpCodes.Call.ToInstruction(writeLine2));
// return 0;
body.Instructions.Add(OpCodes.Ldc_I4_0.ToInstruction());
body.Instructions.Add(OpCodes.Ret.ToInstruction());
entryPoint.Body = body;
// Save the assembly
mod.Write(newFileName);
}
MemberRef SimpleClone(MethodDef methodRef, ITypeDefOrRef declaringType) {
if (module == null)
return new MemberRefUser(null, methodRef.Name, methodRef.MethodSig, declaringType);
var mr = new MemberRefUser(module.ModuleDefMD, methodRef.Name, methodRef.MethodSig, declaringType);
return module.ModuleDefMD.UpdateRowId(mr);
}
public MemberRef CreateInitializeArrayMethod()
{
if (_initializeArrayMethod == null)
{
var runtimeHelpersType = FindOrCreateTypeRef(_module, _module.CorLibTypes.AssemblyRef, "System.Runtime.CompilerServices", "RuntimeHelpers", false);
var systemArrayType = FindOrCreateTypeRef(_module, _module.CorLibTypes.AssemblyRef, "System", "Array", false);
var runtimeFieldHandleType = FindOrCreateTypeRef(_module, _module.CorLibTypes.AssemblyRef, "System", "RuntimeFieldHandle", true);
var methodSig = MethodSig.CreateStatic(_module.CorLibTypes.Void, systemArrayType, runtimeFieldHandleType);
_initializeArrayMethod = _module.UpdateRowId(new MemberRefUser(_module, "InitializeArray", methodSig, runtimeHelpersType.TypeDefOrRef));
}
return _initializeArrayMethod;
}
private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
{
int instructionIndex = dgBody.SelectedRows.TopmostRow().Index + 1;
foreach (Instruction instruction in _copiedInstructions.OrderByDescending(i => i.Offset))
{
var newInstruction = new Instruction(instruction.OpCode);
if (instruction.Operand != null)
switch (instruction.OpCode.OperandType)
{
case OperandType.InlineField:
var field = instruction.Operand as IField;
if (field.DeclaringType.DefinitionAssembly != CurrentAssembly.ManifestModule.Assembly ||
field.Module != CurrentAssembly.ManifestModule)
{
var fieldRef = new MemberRefUser(field.Module, field.Name, field.FieldSig,
field.DeclaringType);
newInstruction.Operand = CurrentAssembly.ManifestModule.Import(fieldRef);
}
else
{
newInstruction.Operand = CurrentAssembly.ManifestModule.ResolveField(field.Rid);
}
break;
case OperandType.InlineMethod:
var method = instruction.Operand as IMethod;
if (method.DeclaringType.DefinitionAssembly != CurrentAssembly.ManifestModule.Assembly ||
method.Module != CurrentAssembly.ManifestModule)
{
var methodRef = new MemberRefUser(method.Module, method.Name, method.MethodSig,
method.DeclaringType);
newInstruction.Operand = CurrentAssembly.ManifestModule.Import(methodRef);
}
else
{
newInstruction.Operand = CurrentAssembly.ManifestModule.ResolveMethod(method.Rid);
}
break;
case OperandType.InlineType:
var type = instruction.Operand as ITypeDefOrRef;
if (type.DefinitionAssembly != CurrentAssembly.ManifestModule.Assembly ||
type.Module != CurrentAssembly.ManifestModule)
{
var typeRef = new TypeRefUser(type.Module, type.Namespace, type.Name,
CurrentAssembly.ManifestModule.CorLibTypes.AssemblyRef);
newInstruction.Operand = CurrentAssembly.ManifestModule.Import(typeRef);
}
else
{
newInstruction.Operand = CurrentAssembly.ManifestModule.ResolveTypeDefOrRef(type.Rid);
}
break;
default:
newInstruction.Operand = instruction.Operand;
break;
}
CurrentAssembly.Method.Body.Instructions.Insert(instructionIndex, newInstruction);
}
FixBranches();
CurrentAssembly.Method.Body.Instructions.UpdateInstructionOffsets();
DataGridViewHandler.ReadMethod(CurrentAssembly.Method);
}
public static void Run()
{
// This is the file that will be created
string newFileName = @"GenericExample2.exe";
// Create the module
var mod = new ModuleDefUser("GenericExample2", Guid.NewGuid(),
new AssemblyRefUser(new AssemblyNameInfo(typeof(int).Assembly.GetName().FullName)));
// It's a console app
mod.Kind = ModuleKind.Console;
// Create the assembly and add the created module to it
new AssemblyDefUser("GenericExample2", new Version(1, 2, 3, 4)).Modules.Add(mod);
// Add the startup type. It derives from System.Object.
TypeDef startUpType = new TypeDefUser("My.Namespace", "Startup", mod.CorLibTypes.Object.TypeDefOrRef);
startUpType.Attributes = TypeAttributes.NotPublic | TypeAttributes.AutoLayout |
TypeAttributes.Class | TypeAttributes.AnsiClass;
// Add the type to the module
mod.Types.Add(startUpType);
// Create the entry point method
MethodDef entryPoint = new MethodDefUser("Main",
MethodSig.CreateStatic(mod.CorLibTypes.Int32, new SZArraySig(mod.CorLibTypes.String)));
entryPoint.Attributes = MethodAttributes.Private | MethodAttributes.Static |
MethodAttributes.HideBySig | MethodAttributes.ReuseSlot;
entryPoint.ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed;
// Name the 1st argument (argument 0 is the return type)
entryPoint.ParamDefs.Add(new ParamDefUser("args", 1));
// Add the method to the startup type
startUpType.Methods.Add(entryPoint);
// Set module entry point
mod.EntryPoint = entryPoint;
// Create System.Console type reference
var systemConsole = mod.CorLibTypes.GetTypeRef("System", "Console");
// Create 'void System.Console.WriteLine(string,object)' method reference
var writeLine2 = new MemberRefUser(mod, "WriteLine",
MethodSig.CreateStatic(mod.CorLibTypes.Void, mod.CorLibTypes.String,
mod.CorLibTypes.Object),
systemConsole);
var assemblyRef = mod.CorLibTypes.AssemblyRef;
// Create 'System.Collections.ObjectModel.ReadOnlyCollection`1' type ref
var roCollectionRef = new TypeRefUser(mod, "System.Collections.ObjectModel", "ReadOnlyCollection`1", assemblyRef);
// Create 'ReadOnlyCollection<!!0>' signature for return type
var roCollectionSig = new GenericInstSig(new ClassSig(roCollectionRef), new GenericMVar(0)); // Return type
// Create 'ReadOnlyCollection<Int32>' type spec
var roCollectionTypeSpec = new TypeSpecUser(new GenericInstSig(new ClassSig(roCollectionRef), mod.CorLibTypes.Int32));
// Create 'ReadOnlyCollection<Int32>.get_Count()' method reference
var roCollectionGetCount = new MemberRefUser(mod, "get_Count",
MethodSig.CreateInstance(mod.CorLibTypes.Int32),
roCollectionTypeSpec);
// Create 'System.Array' type ref
var arrayRef = new TypeRefUser(mod, "System", "Array", assemblyRef);
// Create 'ReadOnlyCollection<T> Array.AsReadOnly<T>(T[] array)' method reference
// Apparently CreateStaticGeneric should be used only if at least one GenericMVar is used? Not 100% certain.
var asReadOnly = new MemberRefUser(mod, "AsReadOnly",
MethodSig.CreateStaticGeneric(1, roCollectionSig, new SZArraySig(new GenericMVar(0))),
arrayRef);
// Create 'Array.AsReadOnly<Int32>' method spec
var asReadOnlySpec = new MethodSpecUser(asReadOnly,
new GenericInstMethodSig(mod.CorLibTypes.Int32));
// Create 'ReadOnlyCollection<Int32>' signature for local
var roCollectionInt32 = roCollectionTypeSpec.TryGetGenericInstSig();
// Method body locals
IList<Local> locals = new List<Local>();
locals.Add(new Local(new SZArraySig(mod.CorLibTypes.Int32))); // local[0]: Int32[]
locals.Add(new Local(roCollectionInt32)); // local[1]: class [mscorlib]System.Collections.ObjectModel.ReadOnlyCollection`1<Int32>
var body = new CilBody(true, new List<Instruction>(), new List<ExceptionHandler>(), locals);
// array = new Int32[2];
body.Instructions.Add(OpCodes.Ldc_I4_2.ToInstruction());
body.Instructions.Add(OpCodes.Newarr.ToInstruction(mod.CorLibTypes.Int32));
body.Instructions.Add(OpCodes.Stloc_0.ToInstruction()); // Store array to local[0]
// array[0] = 5;
body.Instructions.Add(OpCodes.Ldloc_0.ToInstruction());
body.Instructions.Add(OpCodes.Ldc_I4_0.ToInstruction());
body.Instructions.Add(OpCodes.Ldc_I4_5.ToInstruction());
body.Instructions.Add(OpCodes.Stelem_I4.ToInstruction());
// array[1] = 111;
body.Instructions.Add(OpCodes.Ldloc_0.ToInstruction());
body.Instructions.Add(OpCodes.Ldc_I4_1.ToInstruction());
body.Instructions.Add(OpCodes.Ldc_I4.ToInstruction(111));
body.Instructions.Add(OpCodes.Stelem_I4.ToInstruction());
// collection = Array.AsReadOnly<Int32>(array)
body.Instructions.Add(OpCodes.Ldloc_0.ToInstruction());
body.Instructions.Add(OpCodes.Call.ToInstruction(asReadOnlySpec));
body.Instructions.Add(OpCodes.Stloc_1.ToInstruction());
// Console.WriteLine("Count: {0}", collection.Count)
body.Instructions.Add(OpCodes.Ldstr.ToInstruction("Count: {0}"));
body.Instructions.Add(OpCodes.Ldloc_1.ToInstruction());
body.Instructions.Add(OpCodes.Callvirt.ToInstruction(roCollectionGetCount));
body.Instructions.Add(OpCodes.Box.ToInstruction(mod.CorLibTypes.Int32));
body.Instructions.Add(OpCodes.Call.ToInstruction(writeLine2));
// return 0;
body.Instructions.Add(OpCodes.Ldc_I4_0.ToInstruction());
body.Instructions.Add(OpCodes.Ret.ToInstruction());
entryPoint.Body = body;
// Save the assembly
mod.Write(newFileName);
}
/// <summary>
/// Creates a custom ObfuscationAttribute that can be added to a method.
/// </summary>
/// <param name="module">Module</param>
/// <param name="feature">Obfuscation feature name</param>
/// <param name="exclude">true if exclude, false if include</param>
/// <returns>CustomAttribute</returns>
CustomAttribute CreateAttribute(ModuleDef module, String feature, Boolean exclude)
{
TypeSig stringSig = module.CorLibTypes.String;
TypeSig booleanSig = module.CorLibTypes.Boolean;
CANamedArgument[] args = new CANamedArgument[] {
// Feature
new CANamedArgument(
false,
stringSig,
"Feature",
new CAArgument(stringSig, feature)),
// Exclude
new CANamedArgument(
false,
booleanSig,
"Exclude",
new CAArgument(booleanSig, exclude))
};
TypeRef obfuscationRef = new TypeRefUser(
module, "System.Reflection", "ObfuscationAttribute", module.CorLibTypes.AssemblyRef);
MemberRef obfuscationCtor = new MemberRefUser(module, ".ctor",
MethodSig.CreateInstance(module.CorLibTypes.Void),
obfuscationRef);
CustomAttribute attr = new CustomAttribute(
obfuscationCtor,
new CAArgument[0],
args
);
return attr;
}
/// <summary>
/// Calli.
/// </summary>
/// <param name="module">Module</param>
/// <param name="mainType">Main type</param>
/// <returns>Instructions</returns>
static IList<Instruction> GetCalliInstructions(ModuleDef module, TypeDef mainType)
{
TypeRef consoleRef = new TypeRefUser(module, "System", "Console", module.CorLibTypes.AssemblyRef);
MemberRef consoleWrite0 = new MemberRefUser(module, "WriteLine",
MethodSig.CreateStatic(module.CorLibTypes.Void),
consoleRef);
var all = new List<Instruction>();
all.Add(OpCodes.Ldftn.ToInstruction(consoleWrite0));
all.Add(OpCodes.Calli.ToInstruction(consoleWrite0.MethodSig));
all.Add(OpCodes.Ret.ToInstruction());
return all;
}
