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import os.path
import io
import struct
from binascii import b2a_hex
from hexdump import hexdump, asasc, tohex, unhex
from koddecoder import kodecode
"""
python3 crodump.py crodump chechnya_proverki_ul_2012
python3 crodump.py kodump -s 6 -o 0x4cc9 -e 0x5d95 chechnya_proverki_ul_2012/CroStru.dat
"""
def enumunreferenced(ranges, filesize):
o = 0
for start, end, desc in sorted(ranges):
if start > o:
yield o, start-o
o = end
if o<filesize:
yield o, filesize-o
class Datafile:
def __init__(self, dat, tad):
self.dat = dat
self.tad = tad
self.readtad()
self.dat.seek(0, io.SEEK_END)
self.datsize = self.dat.tell()
def readtad(self):
self.tad.seek(0)
hdrdata = self.tad.read(2*4)
self.tadhdr = struct.unpack("<2L", hdrdata)
indexdata = self.tad.read()
self.tadidx = [ struct.unpack_from("<3L", indexdata, 12*_) for _ in range(len(indexdata)//12) ]
def readdata(self, ofs, size):
self.dat.seek(ofs)
return self.dat.read(size)
def dump(self, args, dokodecode=False, plainbytes=0):
print("tadhdr: %08x %08x" % tuple(self.tadhdr))
ranges = []
for i, (ofs, ln, chk) in enumerate(self.tadidx):
if ln==0xFFFFFFFF:
print("%5d: %08x %08x %08x" % (i, ofs, ln, chk))
continue
flags = ln>>24
ln &= 0xFFFFFFF
dat = self.readdata(ofs, ln)
plain = b''
decrypted = ' '
if dokodecode and not args.nokod:
pb = plainbytes if flags else 8
plain = dat[:pb]
dat = kodecode(i+1, dat[pb:])
decrypted = '*' if flags else '+'
if args.ascdump:
print("%5d: %08x-%08x: (%02x:%08x) %s %s%s" % (i, ofs, ofs+ln, flags, chk, tohex(plain), decrypted, asasc(dat)))
else:
print("%5d: %08x-%08x: (%02x:%08x) %s %s%s" % (i, ofs, ofs+ln, flags, chk, tohex(plain), decrypted, tohex(dat)))
ranges.append((ofs, ofs+ln, "item #%d" % i))
if args.verbose:
# output parts not referenced in the .tad file.
for o, l in enumunreferenced(ranges, self.datsize):
dat = self.readdata(o, l)
if args.ascdump:
print("%08x-%08x: %s" % (o, o+l, asasc(dat)))
else:
print("%08x-%08x: %s" % (o, o+l, tohex(dat)))
class Database:
def __init__(self, dbdir):
self.dbdir = dbdir
self.stru = self.getfile("Stru")
self.index = self.getfile("Index")
self.bank = self.getfile("Bank")
self.sys = self.getfile("Sys")
def getfile(self, name):
try:
return Datafile(open(self.getname(name, "dat"), "rb"), open(self.getname(name, "tad"), "rb"))
except IOError:
return
def getname(self, name, ext):
return os.path.join(self.dbdir, "Cro%s.%s" % (name, ext))
def incdata(data, s):
"""
add 's' to each byte.
This is useful for finding the correct shift from an incorrectly shifted chunk.
"""
return b"".join(struct.pack("<B", (_+s)&0xFF) for _ in data)
def decode_kod(args, data):
"""
various methods of hexdumping KOD decoded data.
"""
if args.nokod:
# plain hexdump, no KOD decode
hexdump(args.offset, data)
elif args.shift:
# explicitly specified shift.
args.shift = int(args.shift, 0)
enc = kodecode(args.shift, data)
hexdump(args.offset, enc)
elif args.increment:
# explicitly specified shift.
for s in range(256):
enc = incdata(data, s)
if args.ascdump:
print("%02x: %s" % (s, asasc(enc)))
else:
print("%02x: %s" % (s, tohex(enc)))
else:
# output with all possible 'shift' values.
for s in range(256):
enc = kodecode(s, data)
if args.ascdump:
print("%02x: %s" % (s, asasc(enc)))
else:
print("%02x: %s" % (s, tohex(enc)))
def kod_hexdump(args):
"""
KOD decode a section of a data file
"""
args.offset = int(args.offset, 0)
if args.length:
args.length = int(args.length, 0)
elif args.endofs:
args.endofs = int(args.endofs, 0)
args.length = args.endofs - args.offset
if args.filename:
with open(args.filename, "rb") as fh:
fh.seek(args.offset)
data = fh.read(args.length)
decode_kod(args, data)
else:
# no filename -> read from stdin.
import sys
data = sys.stdin.buffer.read()
if args.unhex:
data = unhex(data)
decode_kod(args, data)
def cro_dump(args):
db = Database(args.dbdir)
if db.stru:
print("stru")
db.stru.dump(args, dokodecode=True)
if args.struonly:
return
if db.index:
print("index")
db.index.dump(args)
if db.bank:
print("bank")
db.bank.dump(args)
if db.sys:
print("sys")
db.sys.dump(args, dokodecode=True, plainbytes=8)
def main():
import argparse
parser = argparse.ArgumentParser(description='CRO hexdumper')
subparsers = parser.add_subparsers()
parser.set_defaults(handler=None)
ko = subparsers.add_parser('kodump', help='KOD/hex dumper')
ko.add_argument('--offset', '-o', type=str, default="0")
ko.add_argument('--length', '-l', type=str)
ko.add_argument('--endofs', '-e', type=str)
ko.add_argument('--unhex', '-x', action='store_true', help="assume the input contains hex data")
ko.add_argument('--shift', '-s', type=str, help="KOD decode with the specified shift")
ko.add_argument('--increment', '-i', action='store_true', help="assume data is already KOD decoded, but with wrong shift -> dump alternatives.")
ko.add_argument('--ascdump', '-a', action='store_true', help="CP1251 asc dump of the data")
ko.add_argument('--nokod', '-n', action='store_true', help="don't KOD decode")
ko.add_argument('filename', type=str, nargs='?', help="dump either stdin, or the specified file")
ko.set_defaults(handler=kod_hexdump)
cro = subparsers.add_parser('crodump', help='CROdumper')
cro.add_argument('--verbose', '-v', action='store_true')
cro.add_argument('--kodecode', '-k', action='store_true')
cro.add_argument('--ascdump', '-a', action='store_true')
cro.add_argument('--nokod', '-n', action='store_true')
cro.add_argument('--struonly', action='store_true')
cro.add_argument('dbdir', type=str)
cro.set_defaults(handler=cro_dump)
args = parser.parse_args()
if args.handler:
args.handler(args)
if __name__=='__main__':
main()
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