Cheat Engine

Jvlaple · Posted: Wed Apr 01, 2009 4:10 am Post subject: [Help] Binary Diff

How would I create a binary diff, such as having one binary file and another then comparing the differences then generating a new patch file which shows the difference between the two files? And then after I've generated the diff how would I apply it? I'm guessing you use some kind of checksum to check which bytes are equal then if they're not you add them into the diff file like:

<byte length><byte offset><AoB to insert>

And then the patcher might read the patch file like

read the length then the offset and the AoB then insert the extra bytes into the file? But how would I be able to accomplish this?

Thanks in advance Very Happy

Zerith · Posted: Wed Apr 01, 2009 4:22 am Post subject:

This makes sense.

nog_lorp · Posted: Wed Apr 01, 2009 7:29 pm Post subject:

Perhaps use one of the patch creators from Crackers Kit.

Jvlaple · Posted: Thu Apr 02, 2009 7:07 am Post subject:

DeletedUser14087 · Posted: Thu Apr 02, 2009 9:54 am Post subject:

Well, compare EACH byte within the same offset, now if it finds one store it in a variable, if it finds more create an array at run-time and store them all (if it finds more) there and when it gets to end of file save it in a file.

Jvlaple · Posted: Thu Apr 02, 2009 9:41 pm Post subject:

DeletedUser14087 · Posted: Fri Apr 03, 2009 3:27 am Post subject: