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> Sent: Thursday, August 20, 2009 4:20 PM > Cc: Aaron Giles > Subject: Re: Brap Boys progress > > Last one for tonight. I'm sending these because I have no idea when > the > next source update will be and I'd prefer it to be as up to date as > possible so that this info can't be lost. > > We're almost half way there as far as decrypting brapboysj tables is > concerned, however, we still need to better understand how the > protection device uses them. > > These all apply against a clean SVN, not the previous patches I sent. > > David Haywood wrote: > > more progress in decrypting the tables. > > > > David Haywood wrote: > >> current progress, 2 extra tables decrypted. > >> > >> > >> David Haywood wrote: > >>> Further work on the decrypting of tables from the ROM. Added a > >>> status table of the data I've decrypted, data I have to study etc. > >>> > >>> David Haywood wrote: > >>>> Missed an 'else' sorry, wasn't decoding the table correctly. > >>>> > >>>> David Haywood wrote: > >>>>> here's another which will decrypt table 0x19 for brapboys. (use > >>>>> this instead of previous) > >>>>> > >>>>> I guess I need to understand something else like where it REALLY > >>>>> writes the table data, or some other maths related ops, because > it > >>>>> just does a trap #0 to an infinite loop and then watchdog resets > >>>>> now without requesting any more tables than the ones I've > >>>>> decrypted. I'll work on decrypting the rest of them tho, as we > >>>>> have a trojan that can supply whatever tables we request, however > >>>>> understanding how to use them is becoming more important. > >>>>> > >>>>> David Haywood wrote: > >>>>>> this decrypts table 11 (ugly ... but correct compared to the > >>>>>> extracted data which is included for verification at this point) > >>>>>> > >>>>>> I may send newer versions as more tables are decrypted, > depending > >>>>>> on progress. This is so that nothing gets lost, and can be > >>>>>> included. |
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