Analyzing a "caught" .usr file, and a new one, lin

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Lord Ned
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Analyzing a "caught" .usr file, and a new one, lin

Postby Lord Ned » Sun Sep 03, 2006 6:18 am

So i'm basicaly analyzing the .usr files of Uplink, line by line. I will use a brand new account, and one that i got caught on. Here are the first line of the two of them.

Caught:

Code: Select all

00000000 52 45 44 53 48 49 52 54  00 D3 C1 D6 B5 B8 80 7F REDSHIRT........


New:

Code: Select all

00000000 52 45 44 53 48 49 52 54  80 80 80 8A 80 80 80 91 REDSHIRT........


So the differance in the first line of code, are the numbers after "54" and before" 00. All of them have changed. I am going to check a few more, and see weither the first "set" of number s(before 54) have any change at all between them. =D

Because i have a theory that it is all based on the second set of numbers, and anything under REDSHIRT collumn.


Anyone have any ideas on this, or should i give up becasue it's impossibl, etc?
Immortius
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Postby Immortius » Sun Sep 03, 2006 10:30 am

That first set of numbers - they're the ascii codes for "REDSHIRT", which is at the beginning of all saved games. Typically a hex editor shows the raw values on the left side of the screen and the ascii for those values on the right.

For analysing the saved games, I suggest comparing copies of the same account, before and after making small changes. That way the differences in the files should be related directly to the change made.
Darksun
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Postby Darksun » Sun Sep 03, 2006 6:38 pm

iirc, when you lose, most of the information about the 'world' that's stored in the save file is lost. Hence it's not possible to hack a caught user file and make it 'uncaught'.

However, the user file format may have changed, and this may no longer be the case
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frenchfrog
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Postby frenchfrog » Sun Sep 03, 2006 10:55 pm

Darksun is rigth, when a game is over the world information is stripped and thus reduce the save game size below 10kb.

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