Cheat Engine

[paul44]

En/decode a lua script does not seem to give problems, but i have been trying to do the same with a Form.
I basically save the form to disk (so not accessible via Table~edit), and (would) load it as file:
//... (as raw file, it can be loaded this way)
local sLua = 'My_Form.frm'
oLua = findTableFile(sLua).stream
My_GUI = createFormFromStream(oLua)
...//

Above works fine, but the form - on disk - should be in encoded format. And i can not get this work - load & decode - somehow ?!

Btw: main reason to use this: the gui references (link & images) to FRF forum; and i obviously like to make sure that it stays this way...

[AylinCE]

Since you encrypted the form text (code), load the encrypted code into a txt file.

At runtime, decrypt the txt code, save it as a ".FRM" file somewhere on disk (like Temp), call it, run it, and delete the decrypted instance from disk.

[Csimbi]

[AylinCE]

If Cheat Engine doesn't have a built-in decoder for your specific encryption method, you must handle the decryption within your script logic.

However, I understand your concern about "defeating the point" by saving it to disk. If you want to avoid the disk entirely for security reasons, you should decrypt the data directly into a MemoryStream instead of a physical file.

Since createFormFromStream expects a stream object, the logic would be:

Load the encrypted file into a local variable/buffer.

Decrypt it in memory (using your custom function).

Write the decrypted string/bytes into a createMemoryStream().

Pass that memory stream to createFormFromStream(ms).

The logic remains the same: Whether it's in RAM or on Disk, the decrypted content must exist somewhere for the engine to parse it.

Also, consider this: Is your main script itself encrypted? If the main script is plain text, anyone can see your decryption function and easily reverse the process to get your FRM content anyway. To truly protect your links/images, the "loader" script itself needs to be protected/wrapped.

[Csimbi]

MemoryStream - check.
Makes sense, thanks!

[paul44]

@AylinCE: "Since you encrypted the form text (code), load the encrypted code into a txt file".
=> you might have misinterpreted my rq: in fact, atm i do NOT know how to encrypt a form (using - logically (?) - CE's encode fn here) 'properly'. If there is/are another method(s), then do tell !

Iow if you know the proper steps to encode a form, and get it working using the decode fn, then that is actually what i'm looking for.

ps: the intention is to use ce v7.6 with its extended/external en/decode functionality/dll.
ps2: yep, i also follow #csimbi's logic.
=> However: if you can work out a practical example as explained in your 2nd post - following them respective steps - then that would be smashing.
(nothing fancy: just using a simple form with a button or whatever)
==> give a shout if you want me to test/prepare/explain something in more detail...

[Dark Byte]

here's an example of non destructively encrypting a tablefile (in this case a form)

[paul44]

^ "just" tested and working; really big thx for this one !

btw: i'm more of a "i have to see it to believe it"-kind_of_a_guy...
So: [ https://ibb.co/3X5sSzq ]

In practise, I see 2 things in our app:
a. only the 'encoded' form is added to the table
b. the decode fn is called in Lua_startup; ànd encoded itself
(~ we kinda have that covered)
=> atm i can not really grasp its impact on the current/existing lua coding, but surely doable (without too much hassle... me hopes)

ps: in case any is wondering what the en/decode function does: it "simply" increases the ascii_value (byte) by '1' (and decode obviously reverses it)

[panraven]

The CEForm method (A)saveToStream seems not match (B)createFormFromStream.
It said 'missing root element' when use (B) to load the stream created by (A).

But this work,

[paul44]

In order to avoid adding the form(file) to the CT table, i've tried to actually 'stream' it to the form... but can't seem to get this one working ?!
(and there isn't much info to be found re these fns).

I've tried both 'createMemorystream()' and 'createStringstream()' here...
(the only 2 methods i've found, with a basic example ~ google ai tells me that streaming this way should be possible, but does not reference an example ~ perhaps it collected from winapi ?)


ps: i've also pm-ed #panraven if he knew of a fn to remove an attached file:
>> myfile.delete()
(also tried .destroy() and .kill() before, but no cigar)

[AylinCE]

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