Touhou Koumajou Densetsu
Posted: Sun Jul 31, 2011 4:34 am
The contents of this post was deleted because of possible forum rules violation.
i ported the method to bms for you though:
Code: Select all
idstring "DPMX"
get dataOffset long
get files long
get dummy long
for i = 0 < files
getdstring name 16
get dummy long # -1
get seed_0 byte
get seed_1 byte
get seed_2 byte
get seed_3 byte
get offset long
math offset += dataOffset #offset relative to the start of data section
get size long
log MEMORY_FILE offset size
callfunction unobfuscate
log name 0 size MEMORY_FILE
next i
cleanexit
# ported to bms by WRS
# source: http://asmodean.reverse.net/misc/_/exdpmx.zip
# exdpmx.cpp
# coded by asmodean
startfunction unobfuscate
set SEED2 byte 0xAA
set SEED3 byte 0x55
set SEED1 byte seed_0
math SEED1 += SEED3 # 55
math SEED1 ^= seed_2
set SEED4 byte seed_1
math SEED4 += SEED2 # AA
math SEED4 ^= seed_3
set MUT1 byte SEED1
math MUT1 += SEED2
set MUT2 byte SEED3
math MUT2 += SEED4
set KEY byte 0
for i = 0 < size
getvarchr BUFF MEMORY_FILE i
math BUFF -= MUT2
math BUFF ^= MUT1
math KEY += BUFF
putvarchr MEMORY_FILE i KEY
next i
endfunction