protected override bool CheckHandlerMethodDesktopInternal(MethodDef handler) {
if (CheckHandlerV3(handler)) {
version = ResourceVersion.V3;
return true;
}
simpleDeobfuscator.Deobfuscate(handler);
if ((data40 = CheckHandlerV40(handler)) != null) {
version = ResourceVersion.V40;
return true;
}
var info = GetHandlerArgs41(handler);
Data41 data41Tmp;
if (info != null && CheckHandlerV41(info, out data41Tmp)) {
version = ResourceVersion.V41;
data41 = data41Tmp;
return true;
}
return false;
}
static Data40 CheckHandlerV40(MethodDef handler) {
var data40 = new Data40();
var instrs = handler.Body.Instructions;
for (int i = 0; i < instrs.Count; i++) {
int index = i;
if (instrs[index++].OpCode.Code != Code.Ldarg_1)
continue;
var ldtoken = instrs[index++];
if (ldtoken.OpCode.Code != Code.Ldtoken)
continue;
var field = ldtoken.Operand as FieldDef;
string methodSig = "(System.ResolveEventArgs,System.RuntimeFieldHandle,System.Int32,System.String,System.Int32)";
var method = ldtoken.Operand as MethodDef;
if (method != null) {
// >= 4.0.4
if (!DotNetUtils.IsMethod(method, "System.Byte[]", "()"))
continue;
field = GetResourceField(method);
methodSig = "(System.ResolveEventArgs,System.RuntimeMethodHandle,System.Int32,System.String,System.Int32)";
}
else {
// 4.0.1.18 .. 4.0.3
}
if (field == null || field.InitialValue == null || field.InitialValue.Length == 0)
continue;
var ldci4_len = instrs[index++];
if (!ldci4_len.IsLdcI4())
continue;
if (ldci4_len.GetLdcI4Value() != field.InitialValue.Length)
continue;
if (instrs[index++].OpCode.Code != Code.Ldstr)
continue;
var ldci4_magic = instrs[index++];
if (!ldci4_magic.IsLdcI4())
continue;
data40.magic = ldci4_magic.GetLdcI4Value();
var call = instrs[index++];
if (call.OpCode.Code == Code.Tailcall)
call = instrs[index++];
if (call.OpCode.Code != Code.Call)
continue;
var resolveHandler2 = call.Operand as MethodDef;
if (!DotNetUtils.IsMethod(resolveHandler2, "System.Reflection.Assembly", methodSig))
continue;
data40.resourceField = field;
data40.getDataMethod = method;
data40.resolveHandler2 = resolveHandler2;
return data40;
}
return null;
}
