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Finding the CRC in memory

 
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argarg
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PostPosted: Tue Mar 20, 2007 8:02 pm    Post subject: Finding the CRC in memory Reply with quote

Hi, im trying to make a CRC bypass for another game than maplestory and I was wondering how the hell to you find which part of the memory is the CRC?
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ravicus
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PostPosted: Tue Mar 20, 2007 8:49 pm    Post subject: Reply with quote

Do you even know what a CRC Bypass does?
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argarg
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PostPosted: Wed Mar 21, 2007 5:44 am    Post subject: Reply with quote

Yes I do know what is it, it's the part of the memory which is being compared with the server or the guy you're playing against (in my case it's for a RTS game) to be sure you have the same data/values, Now could I get an answer?
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CZ3R0C
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PostPosted: Wed Mar 21, 2007 6:31 am    Post subject: Reply with quote

A cyclic redundancy check (CRC) is a type of hash function, which is used to produce a small, fixed-size checksum of a larger block of data, such as a packet of network traffic or a computer file. The checksum is used to detect errors* after transmission or storage.
-Wikipeda


Errors can include CRC differences and mismatching. Saying that a crc bypass is "the part of the memory which is being compared with the server or the guy you're playing against" shows you know little. Even though it can be checked against a server stored 'hash', it is not checked against the person you are playing against. And it is not the same unless the person you are playing against is hosting the game, and even with that most games w/o real hack protection...there are no crc checks.

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ravicus
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PostPosted: Wed Mar 21, 2007 7:20 am    Post subject: Reply with quote

Well, I have been trying to go deeper into hacking Graal 4, but I havn't had much luck since every time I change an OpCode, I get errors until i exit.
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Gthuggin
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PostPosted: Mon Mar 26, 2007 4:06 am    Post subject: Reply with quote

ya ive been trying to figure out how the CRC bypass was found in the first place! right?

where would you start?

the guy just didn't go looking through all the memory and go "oh this must be it"

then writes a script! lol there has to be a science to it ya know what i mean?

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