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SubjectRe: Hitachi Encryption Reply to this message
Posted bysmf
Posted on09/13/04 03:43 PM

> Are there some opcodes which can used for decryption?

yes, it's well documented on his site ( fwiw I came up with the pea/odd vector method charles used, he credited me by my first name for some reason ).

unfortunately there seems to be a point where the encryption changes. it could be a one time thing ( i.e. boot code is encrypted one way & the rest is encrypted another ) or different parts of the game may be encrypted differently.

after the ( from memory ):
move.w #$2700, SR
cmp.l #$52ffff, d0

The encryption changes. I sent charles some more things to try but haven't heard back.


Entire Thread
Subject  Posted byPosted On
*Hitachi Encryption  finaldave08/26/04 01:35 PM
.*Re: Hitachi Encryption  smf09/11/04 07:19 AM
..*Re: Hitachi Encryption  finaldave09/11/04 10:03 PM
....Re: Hitachi Encryption  smf09/13/04 03:43 PM
...*Re: Hitachi Encryption  R. Belmont09/12/04 03:32 AM
....*Re: Hitachi Encryption  finaldave09/16/04 00:00 AM
.....*cmpi.l #$0091ffff,d0  finaldave09/17/04 11:47 AM
......*Screenshots!  finaldave09/20/04 12:19 PM
.......*Re: Screenshots!  smf09/21/04 06:54 AM
........*Re: Screenshots!  finaldave09/22/04 03:09 PM
.........*Re: Screenshots!  R. Belmont09/28/04 05:50 PM
..........*Re: Screenshots!  Barry Rodewald09/28/04 10:59 PM
...........*Re: Screenshots!  smf09/30/04 05:44 AM