Questions about markers

[Forrest Gump]

Hello Enigma,

I am a database application developer who understand nothing of low level programming I think Enigma Protector is excellent because I can use markers to protect parts my application easily.

Here comes the... uhm... stupid questions

1. When/where should I use the VM, Decrypt_On_Execute and Check_Protection markers? I mean maybe you could give some practical tips about what is the preferred marker to protect what kind of code.

2. Is the code inside Run_Once markers executed is virtualized too? Like VM marker but after execution the virtualized(?) code will be deleted from memory?

3. If I have 2 procedures like this:

Code: Select all

Procedure TForm1.Drive;
begin
  ...
end;

Procedure TForm1.DrinkVodka;
begin
  {$I vm_begin.inc}
  ...
  Drive;
  ...
  {$I vm_end.inc}
end

;

Is the procedure Drive protected too?

4. Is it safe to use VM markers inside a simple thread (a worker thread that only talk to the main thread, not with another worker thread) ?

Thank you Enigma

[GROL]

also question from me, it's correct?:

Code: Select all

procedure TForm1.PROC1;
begin
  {$I vm_begin.inc}
  ...
  {$I vm_end.inc}
end;

procedure TForm1.PROC2;
begin
  {$I vm_begin.inc}
  ...
  PROC1;
  ...
  {$I vm_end.inc}
end

[Sebastiano]

1. You should use vm in that parts of ur code what r not requring high execution speed but r critical for ur app engine
2. Not virtualized, code will be cleaned after the first execution, use it only in some init stuff that requires high execution speed, if there is no such places u should use vm in most cases
3. It's not protected, only Drive() call is protected

[Enigma]

Sebastiano thank you very much for the reply, I fully agree with you.

3. If I have 2 procedures like this:

No, the only call of Drive function is protected. You have to quote the code of Drive function to protect it.

4. Is it safe to use VM markers inside a simple thread (a worker thread that only talk to the main thread, not with another worker thread) ?

Yes, using any kind of markers is thread safe, so you can use it anywhere without any restrictions.

also question from me, it's correct?:

Code: Select all

procedure TForm1.PROC1;
begin
  {$I vm_begin.inc}
  ...
  {$I vm_end.inc}
end;

procedure TForm1.PROC2;
begin
  {$I vm_begin.inc}
  ...
  PROC1;
  ...
  {$I vm_end.inc}
end

Yes, sure, this is correct!

[Forrest Gump]

Thank you guys.

Now since we can not have markers inside markers, I think it is a good thing if you make "hybrid markers" like VM_Run_Once and another variations, if possible.

[Enigma]

Now since we can not have markers inside markers, I think it is a good thing if you make "hybrid markers" like VM_Run_Once and another variations, if possible.

Yes, I 100% agree with you. There is just one issue. We need to decide how is it better to make this. For example, we can add a VM_Run_Once marker (same as VM_Reg_Crypt etc etc), there will appear few new markers. Or, maybe better, allow VM marker to contain another kind of markers.

This issue in todo list..