protected override void Execute(ConfuserContext context, ProtectionParameters parameters)
{
if (context.Packer == null)
return;
if (context.Annotations.Get<CompressorContext>(context, Compressor.ContextKey) != null)
return;
var mainModule = parameters.GetParameter<string>(context, null, "main");
if (context.CurrentModule.Name == mainModule) {
var ctx = new CompressorContext {
ModuleIndex = context.CurrentModuleIndex,
Assembly = context.CurrentModule.Assembly
};
context.Annotations.Set(context, Compressor.ContextKey, ctx);
ctx.ModuleName = context.CurrentModule.Name;
context.CurrentModule.Name = "koi";
ctx.EntryPoint = context.CurrentModule.EntryPoint;
context.CurrentModule.EntryPoint = null;
ctx.Kind = context.CurrentModule.Kind;
context.CurrentModule.Kind = ModuleKind.NetModule;
context.CurrentModule.Assembly.Modules.Remove(context.CurrentModule);
context.CurrentModuleWriterListener.OnWriterEvent += new ResourceRecorder(ctx, context.CurrentModule).OnWriterEvent;
}
}
protected override void Execute(ConfuserContext context, ProtectionParameters parameters)
{
if (context.Packer == null)
return;
bool isExe = context.CurrentModule.Kind == ModuleKind.Windows ||
context.CurrentModule.Kind == ModuleKind.Console;
if (context.Annotations.Get<CompressorContext>(context, Compressor.ContextKey) != null) {
if (isExe) {
context.Logger.Error("Too many executable modules!");
throw new ConfuserException(null);
}
return;
}
if (isExe) {
var ctx = new CompressorContext {
ModuleIndex = context.CurrentModuleIndex,
Assembly = context.CurrentModule.Assembly
};
context.Annotations.Set(context, Compressor.ContextKey, ctx);
ctx.ModuleName = context.CurrentModule.Name;
context.CurrentModule.Name = "koi";
ctx.EntryPoint = context.CurrentModule.EntryPoint;
context.CurrentModule.EntryPoint = null;
ctx.Kind = context.CurrentModule.Kind;
context.CurrentModule.Kind = ModuleKind.NetModule;
context.CurrentModuleWriterListener.OnWriterEvent += new ResourceRecorder(ctx, context.CurrentModule).OnWriterEvent;
}
}
internal StubProtection(CompressorContext ctx)
{
this.ctx = ctx;
}
public KeyInjector(CompressorContext ctx)
{
this.ctx = ctx;
}
void PackModules(ConfuserContext context, CompressorContext compCtx, ModuleDef stubModule, ICompressionService comp, RandomGenerator random)
{
int maxLen = 0;
var modules = new Dictionary<string, byte[]>();
for (int i = 0; i < context.OutputModules.Count; i++) {
if (i == compCtx.ModuleIndex)
continue;
string name = context.Modules[i].Assembly.Name.ToUpperInvariant();
modules.Add(name, context.OutputModules[i]);
int strLen = Encoding.UTF8.GetByteCount(name);
if (strLen > maxLen)
maxLen = strLen;
}
foreach (var extModule in context.ExternalModules) {
var name = GetName(extModule).ToUpperInvariant();
modules.Add(name, extModule);
int strLen = Encoding.UTF8.GetByteCount(name);
if (strLen > maxLen)
maxLen = strLen;
}
byte[] key = random.NextBytes(4 + maxLen);
key[0] = (byte)(compCtx.EntryPointToken >> 0);
key[1] = (byte)(compCtx.EntryPointToken >> 8);
key[2] = (byte)(compCtx.EntryPointToken >> 16);
key[3] = (byte)(compCtx.EntryPointToken >> 24);
for (int i = 4; i < key.Length; i++) // no zero bytes
key[i] |= 1;
compCtx.KeySig = key;
int moduleIndex = 0;
foreach (var entry in modules) {
byte[] name = Encoding.UTF8.GetBytes(entry.Key);
for (int i = 0; i < name.Length; i++)
name[i] *= key[i + 4];
uint state = 0x6fff61;
foreach (byte chr in name)
state = state * 0x5e3f1f + chr;
byte[] encrypted = compCtx.Encrypt(comp, entry.Value, state, progress => {
progress = (progress + moduleIndex) / modules.Count;
context.Logger.Progress((int)(progress * 10000), 10000);
});
context.CheckCancellation();
var resource = new EmbeddedResource(Convert.ToBase64String(name), encrypted, ManifestResourceAttributes.Private);
stubModule.Resources.Add(resource);
moduleIndex++;
}
context.Logger.EndProgress();
}
void InjectStub(ConfuserContext context, CompressorContext compCtx, ProtectionParameters parameters, ModuleDef stubModule)
{
var rt = context.Registry.GetService<IRuntimeService>();
RandomGenerator random = context.Registry.GetService<IRandomService>().GetRandomGenerator(Id);
var comp = context.Registry.GetService<ICompressionService>();
IEnumerable<IDnlibDef> defs = InjectHelper.Inject(rt.GetRuntimeType("Confuser.Runtime.Compressor"), stubModule.GlobalType, stubModule);
switch (parameters.GetParameter(context, context.CurrentModule, "key", Mode.Normal)) {
case Mode.Normal:
compCtx.Deriver = new NormalDeriver();
break;
case Mode.Dynamic:
compCtx.Deriver = new DynamicDeriver();
break;
default:
throw new UnreachableException();
}
compCtx.Deriver.Init(context, random);
context.Logger.Debug("Encrypting modules...");
// Main
MethodDef entryPoint = defs.OfType<MethodDef>().Single(method => method.Name == "Main");
stubModule.EntryPoint = entryPoint;
if (compCtx.EntryPoint.HasAttribute("System.STAThreadAttribute")) {
var attrType = stubModule.CorLibTypes.GetTypeRef("System", "STAThreadAttribute");
var ctorSig = MethodSig.CreateInstance(stubModule.CorLibTypes.Void);
entryPoint.CustomAttributes.Add(new CustomAttribute(
new MemberRefUser(stubModule, ".ctor", ctorSig, attrType)));
}
else if (compCtx.EntryPoint.HasAttribute("System.MTAThreadAttribute")) {
var attrType = stubModule.CorLibTypes.GetTypeRef("System", "MTAThreadAttribute");
var ctorSig = MethodSig.CreateInstance(stubModule.CorLibTypes.Void);
entryPoint.CustomAttributes.Add(new CustomAttribute(
new MemberRefUser(stubModule, ".ctor", ctorSig, attrType)));
}
uint seed = random.NextUInt32();
compCtx.OriginModule = context.OutputModules[compCtx.ModuleIndex];
byte[] encryptedModule = compCtx.Encrypt(comp, compCtx.OriginModule, seed,
progress => context.Logger.Progress((int)(progress * 10000), 10000));
context.Logger.EndProgress();
context.CheckCancellation();
compCtx.EncryptedModule = encryptedModule;
MutationHelper.InjectKeys(entryPoint,
new[] { 0, 1 },
new[] { encryptedModule.Length >> 2, (int)seed });
InjectData(stubModule, entryPoint, encryptedModule);
// Decrypt
MethodDef decrypter = defs.OfType<MethodDef>().Single(method => method.Name == "Decrypt");
decrypter.Body.SimplifyMacros(decrypter.Parameters);
List<Instruction> instrs = decrypter.Body.Instructions.ToList();
for (int i = 0; i < instrs.Count; i++) {
Instruction instr = instrs[i];
if (instr.OpCode == OpCodes.Call) {
var method = (IMethod)instr.Operand;
if (method.DeclaringType.Name == "Mutation" &&
method.Name == "Crypt") {
Instruction ldDst = instrs[i - 2];
Instruction ldSrc = instrs[i - 1];
Debug.Assert(ldDst.OpCode == OpCodes.Ldloc && ldSrc.OpCode == OpCodes.Ldloc);
instrs.RemoveAt(i);
instrs.RemoveAt(i - 1);
instrs.RemoveAt(i - 2);
instrs.InsertRange(i - 2, compCtx.Deriver.EmitDerivation(decrypter, context, (Local)ldDst.Operand, (Local)ldSrc.Operand));
}
else if (method.DeclaringType.Name == "Lzma" &&
method.Name == "Decompress") {
MethodDef decomp = comp.GetRuntimeDecompressor(stubModule, member => { });
instr.Operand = decomp;
}
}
}
decrypter.Body.Instructions.Clear();
foreach (Instruction instr in instrs)
decrypter.Body.Instructions.Add(instr);
// Pack modules
PackModules(context, compCtx, stubModule, comp, random);
}
public ResourceRecorder(CompressorContext ctx, ModuleDef module)
{
this.ctx = ctx;
targetModule = module;
}
internal StubProtection(CompressorContext ctx, ModuleDef originModule)
{
this.ctx = ctx;
this.originModule = originModule;
}
internal StubProtection(CompressorContext ctx, ModuleDef originModule)
{
this.ctx = ctx;
this.originModule = originModule;
}
public ResourceRecorder(CompressorContext ctx, ModuleDef module)
{
this.ctx = ctx;
targetModule = module;
}
internal StubProtection(CompressorContext ctx)
{
this.ctx = ctx;
}