public void MergeDecryptionCode(AssemblyDef target)
{
// Merge decryption code
string code = Resources.DesValueDecrypterCode();
var decrypter = AssemblyDef.Compile(code);
target.Merge(decrypter);
// Add rule to avoid recursive calls to decryption code
// and method dead core removal
ObfuscationRule rule = new ObfuscationRule("des_values");
rule.Exclude(Features.ValueEncryption, Features.DeadCode)
.Targeting(Targets.Methods)
.Matching(new Regex("DesValueDecrypter.*"));
rule.ApplyTo(target);
// Get merged methods
_decryptArray = target.Find <MethodDef>("DesEncrypt.Code.DesValueDecrypter::DecryptArray.*", true);
_decryptInt32 = target.Find <MethodDef>("DesEncrypt.Code.DesValueDecrypter::DecryptInt32.*", true);
// Store to encrypted data
_encryptedData = target.Find <FieldDef>("DesEncrypt.Code.DesValueDecrypter::encrypted.*", true);
}
private void MergeDecompress(AssemblyDef target)
{
string lzma = Resources.LZMADecoderCode();
string code = Resources.ResUnpakerCode();
var unpacker = AssemblyDef.Compile(lzma, code);
target.Merge(unpacker);
_unpackStream = target.Find <MethodDef>("ResPacker.Code.ResUnpaker::UnpackResourceStream.*", true);
}
private void MergeAntiDebug(AssemblyDef target)
{
string code = Resources.AntiDebugNetCode();
Compiler compiler = new Compiler();
compiler.ReferencedAssemblies.Add("System.dll");
var antiDebug = AssemblyDef.Compile(compiler, code);
target.Merge(antiDebug);
var method = target.Find <MethodDef>("AntiDebug.Code.AntiDebug::Start.*", true);
// Call AntiDebug::Start at module initializer
target.CallAtModuleInitializer(method);
}
private void MergeLicensingCode(AssemblyDef target)
{
// Merge decryption code
string code = Resources.LicenseFileCheckWinFormCode();
Compiler compiler = new Compiler();
compiler.ReferencedAssemblies.Add("System.dll");
compiler.ReferencedAssemblies.Add("System.Windows.Forms.dll");
compiler.ReferencedAssemblies.Add(@".\Babel.Licensing.dll");
var licensing = AssemblyDef.Compile(compiler, code);
target.Merge(licensing, true);
var method = target.Find <MethodDef>(".*::ValidateLicense.*", true);
// Call license validation at module initializer
target.CallAtModuleInitializer(method);
}
